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-   -   Crank Trigger (https://classracer.com/classforum/showthread.php?t=49049)

Tom keedle 09-05-2013 07:56 PM

Re: Crank Trigger
 
Quote:

Originally Posted by Todd Hoven (Post 398425)
I wasn't going to join this but I figured I would stick in my 2 cents. I had a problem with with my engine in the begining of my race season with a high speed miss above 6500. I chased the normal things, but wound up with a cam profile issue that caused destabilization in the valvetrain above the rpm stated above rpm. After a cam change my problem was solved. One of the conditions that was resolved was the timing jumping around while trying to set it. My issue is a small base circle cast cam core that was flexing with the aggressive lobe. The new cam had a different lobe and a slightly bigger base circle and cam core. I figure my cam was flexing and this was the reason for the timing variation.
I can see benifets to a crank trigger, when you are running very aggressive roller cams with alot of spring pressure causing cam flex in certain circumstances, and timing variation. With a crank trigger you eleminate a few parts that can cause an issue, nothing is more accurate than taking a signal off of the crankshaft. If you have a big enough cam core, and the right lobe design for what your trying to do, I'm sure a distributor will work well. I'm not really sure you will any ET in one over a good distributor. But I'm sure it won't slow you down. Your mileage may varry. Good luck.

now, if your distributor was at the FRONT of the engine, you wouldn't have had this problem,correct?

Chad Rhodes 09-05-2013 08:33 PM

Re: Crank Trigger
 
Quote:

Originally Posted by buzzinhalfdozen (Post 398450)
Oh I think 1 retard in that car is enough.

Bwahahahaha

Todd Hoven 09-05-2013 09:28 PM

Re: Crank Trigger
 
Quote:

Originally Posted by Tom keedle (Post 398515)
now, if your distributor was at the FRONT of the engine, you wouldn't have had this problem,correct?


I'm sure I wouldnt.

R Lowry 09-05-2013 09:45 PM

Re: Crank Trigger
 
1320 racer, why don't you just shut up!!!

1320racer 09-06-2013 07:54 AM

Re: Crank Trigger
 
Quote:

Originally Posted by Todd Hoven (Post 398425)
I can see benifets to a crank trigger, when you are running very aggressive roller cams with alot of spring pressure causing cam flex in certain circumstances, and timing variation.

Todd, I'm pretty sure my cam with over .800 lift and 30 degree intensity and spring pressure falls under what you might call..."very aggressive roller cams with alot of spring pressure" with . Now IF my cam is flexing(standard BBC core btw) and my timing varying, it's doing it exactly the same every pass on any given day, 36 weekends a seeaon, 250+ passes a season because it ain't showing on the time slip with runs that typically vary thousanths from pass to pass.;)

BTW, I also run 3/8" .080 wall, 1 piece pushrods and ain't ever broke a pushrod in any of my race engines EVER!

Jim Kaekel 09-06-2013 08:30 AM

Re: Crank Trigger
 
BTW, I also run 3/8" .080 wall, 1 piece pushrods and ain't ever broke a pushrod in any of my race engines EVER![/QUOTE]

There's a statement that shows your complete ignorance. Pushrods flex a helluva lot before they break. I would think that a 7/16" x .120" wall pushrod in your car would pick up some HP and I'm surely not "Grumpy" Jenkins.

Pedigo Perf 09-06-2013 08:31 AM

Re: Crank Trigger
 
Quote:

Originally Posted by 1320racer (Post 398564)
Todd, I'm pretty sure my cam with over .800 lift and 30 degree intensity and spring pressure falls under what you might call..."very aggressive roller cams with alot of spring pressure" with . Now IF my cam is flexing(standard BBC core btw) and my timing varying, it's doing it exactly the same every pass on any given day, 36 weekends a seeaon, 250+ passes a season because it ain't showing on the time slip with runs that typically vary thousanths from pass to pass.;)

BTW, I also run 3/8" .080 wall, 1 piece pushrods and ain't ever broke a pushrod in any of my race engines EVER!

Why would you need the best of anything in your cushy little bracket car. You can get by with a lot of slop if you don't need to outrun a guy who is pushing the limits. Clearly this game is NOT for you.

1320racer 09-06-2013 08:37 AM

Re: Crank Trigger
 
Quote:

Originally Posted by Pedigo Perf (Post 398573)
Why would you need the best of anything in your cushy little bracket car. You can get by with a lot of slop if you don't need to outrun a guy who is pushing the limits. Clearly this game is NOT for you.

coming from the guy that thinks timing changes with oil viscosity and oil temp who also can't apply the proper torque on a stud or bolt to keep a distributor clamp from loosening up.:rolleyes:

Quote:

Originally Posted by Jim Kaekel (Post 398572)
BTW, I also run 3/8" .080 wall, 1 piece pushrods and ain't ever broke a pushrod in any of my race engines EVER!

There's a statement that shows your complete ignorance. Pushrods flex a helluva lot before they break. I would think that a 7/16" x .120" wall pushrod in your car would pick up some HP and I'm surely not "Grumpy" Jenkins.[/QUOTE]
and you would be wrong! Grumpy raced Pro Stock a long, long time ago and built high RPM engines for comp and pro stock which neither you are I are doing!

Further, these same pushrods are in 1000s of engines built by the biggest names in sportsman engine builders, run in the super catagories as well brackets.

Joe Toller 09-06-2013 08:39 AM

Re: Crank Trigger
 
It's obvious to me that 1320 is just *very* insecure. He gets off on this because he has little else to do. Like the youngsters say, "don't feed the trolls."

Why else would he be spouting off on a class forum, if he's not a class racer?

buzzinhalfdozen 09-06-2013 08:40 AM

Re: Crank Trigger
 
Quote:

Originally Posted by Jim Kaekel (Post 398572)
BTW, I also run 3/8" .080 wall, 1 piece pushrods and ain't ever broke a pushrod in any of my race engines EVER!

There's a statement that shows your complete ignorance. Pushrods flex a helluva lot before they break. I would think that a 7/16" x .120" wall pushrod in your car would pick up some HP and I'm surely not "Grumpy" Jenkins.[/QUOTE]

Jim, dead on with a 0, a 3/8 pushrod unless possibly it's .120 wall with any real cam profile or spring pressure bends like crazy....seen it personally, not merely speculation. Would see witness marks on the head of rubbing with an observed static pushrod to head clearence of at least 3/16 of an inch please don't try to help this person!

buzzinhalfdozen 09-06-2013 08:53 AM

Re: Crank Trigger
 
Quote:

Originally Posted by 1320racer (Post 398575)
coming from the guy that thinks timing changes with oil viscosity and oil temp who also can't apply the proper torque on a stud or bolt to keep a distributor clamp from loosening up.:rolleyes:



There's a statement that shows your complete ignorance. Pushrods flex a helluva lot before they break. I would think that a 7/16" x .120" wall pushrod in your car would pick up some HP and I'm surely not "Grumpy" Jenkins.

and you would be wrong! Grumpy raced Pro Stock a long, long time ago and built high RPM engines for comp and pro stock which neither you are I are doing!

Further, these same pushrods are in 1000s of engines built by the biggest names in sportsman engine builders, run in the super catagories as well brackets.[/QUOTE]

So now you know what pushrods Grumpy used????? You spoke to him on the subject? You stated these are the same pushrods usedin 1000s of engines again how could you possibly know this to be true, did you personally assemvle or witness their installation? For someone that's constantly quoting "truth and facts" you never seem to have any "PROOF" to support your statements. So you're merely Speculating that you are correct. Now I've personally observed maybe close to 100 engines, big and small in the past couple years equipped with 7/16 or 1/2 in. pushrods (bracket, SS top sportsman) if you could explain exactly why these racers and their engine builders are doing it wrong by not merely using the 3/8 stuff we're all ears otherwise keep your speculation to yourself. Yet another subject you've commented on with no knowledge of the forces at work. Kinda lame for a guy who's supposedly an engineer. Believe I noticed on here someone eluded that sunset does your engines..is this correct?

1320racer 09-06-2013 09:04 AM

Re: Crank Trigger
 
the master tech continues to try while failing again, to argue about what he thinks he knows, clearly subjects beyond his experience, over his head and above his pay grade!:p

My engine builder as well as many other nationally known engine builders install 3/8" 1 piece pushrods in the conventional headed BBC super class and bracket engines making upwards of 1100HP!

NO head rubbing, NO witness marks, NO broken pushrods on my current engine seeing 8000 in the lights every weekend, 36 weekends a season for the past 5 seasons, or my previous engine for 17 seasons! Not 1 broken pushrod in 22 years and over 5000 passes racing conventional headed BBCs with 3/8" pushrods!!!

buzzinhalfdozen 09-06-2013 09:47 AM

Re: Crank Trigger
 
Quote:

Originally Posted by 1320racer (Post 398587)
the master tech continues to try while failing again, to argue about what he thinks he knows, clearly subjects beyond his experience, over his head and above his pay grade!:p

My engine builder as well as many other nationally known engine builders install 3/8" 1 piece pushrods in the conventional headed BBC super class and bracket engines making upwards of 1100HP!

NO head rubbing, NO witness marks, NO broken pushrods on my current engine seeing 8000 in the lights every weekend, 36 weekends a season for the past 5 seasons, or my previous engine for 17 seasons! Not 1 broken pushrod in 22 years and over 5000 passes racing conventional headed BBCs with 3/8" pushrods!!!

First, you have no idea how much money I make but from your post it looks like YOU make around 380,000 (your figure ,four times what I make) second IF you actually held an engineering degree simple math and an understanding of the materials involved would be used to find the answer which would indicate you posess no such degree unless it's in the waste managment field. Lastly again you refuse to answer direct questions or provide direct proof of your claims unless you've spoken to every engine builder and asked them specifically what pushrod (and most importantly WHY) you're simply as I've many times stated talking SH!T. BTW point out on a post where I stated 3/8 pushrods break....go ahead find it.

1320racer 09-06-2013 09:56 AM

Re: Crank Trigger
 
I admittingly was foolish to assume a "master tech" with many certificates he earned from general motors technical college and who's skill set allows him to diagnose and repair a "modern vehicle" made at least $100,000 in the year 2013 when I stated I make at least 4 times your salary.

Shame on me.:p

The op has read our replies to his question and made his decision. I'm done with this thread.

Jim Kaekel 09-06-2013 10:07 AM

Re: Crank Trigger
 
I'm done with this thread.[/QUOTE]

Thank God.

Jeff Lee 09-06-2013 10:25 AM

Re: Crank Trigger
 
For an "engineer", 1320 can't even find a calculator (if he can't even do it in his head).
$380,000 / 4 = $95,000 per year. That's $5,000 less per year than 1320's math.

Flippant comments, flippant math, I detect a pattern....:rolleyes:

Reed Granrt 09-06-2013 12:10 PM

Re: Crank Trigger
 
Quote:

Originally Posted by Jeff Lee (Post 398614)
For an "engineer", 1320 can't even find a calculator (if he can't even do it in his head).
$380,000 / 4 = $95,000 per year. That's $5,000 less per year than 1320's math.

Flippant comments, flippant math, I detect a pattern....:rolleyes:


$380,000 or $95,000 or $100,000 is not a good representation of knowlege that we get paid for, cause look at our Congress people. They all make more than that and look at what they knooooow..
reed

Ken Haase 09-07-2013 02:12 AM

Re: Crank Trigger
 
Perhaps I can help js72mav feel better about going with a crank trigger and put this thread to rest at the same time.

My all steel(except hood) 377" SBC Malibu ran a best of 10.22/131(6.51 1/8th) without the benefit of a crank trigger.

So I purchased an MSD crank trigger and now my car is capable of violating it's 8.50 cert and topping 160 MPH. And I'm amazed at the stability of the timing and the ease of adjustment. Now, some of my racing bud's argue vehemently with me that the dramatic increase in my car's performance can be traced to the fact that my crank trigger is bolted to a 555" BBC that is planted in a 2500 lb. tube chassis Firebird, but I steadfastly disagree. I think it's the crank trigger, and I would never go back.

'course at almost 20 g's, it was a little pricey for a crank trigger!

P.S. What on earth could Kyle have done to get sentenced to the gulag? He's one funny dude.

Pedigo Perf 09-07-2013 09:27 AM

Re: Crank Trigger
 
Quote:

Originally Posted by Ken Haase (Post 398733)
P.S. What on earth could Kyle have done to get sentenced to the gulag? He's one funny dude.

I have no idea how this has happened, but apparently Kyle has been perceived as a sexual deviant. Perhaps admin has a keen eye for the obvious.

Why this site tends to prefer the edgy and enlightening comments of 1320racer instead of Kyle's colorful humor remains a mystery.

TP

MidwestStocker 09-07-2013 05:43 PM

Re: Crank Trigger
 
Quote:

Originally Posted by 1320racer (Post 398587)

NO head rubbing, NO witness marks, NO broken pushrods on my current engine seeing 8000 in the lights every weekend, 36 weekends a season for the past 5 seasons, or my previous engine for 17 seasons! Not 1 broken pushrod in 22 years and over 5000 passes racing conventional headed BBCs with 3/8" pushrods!!!

Every weekend???? Really???? Oh you are good???? You can post and race all at the same time???? Maybe you should focus more on racing............

Let's see... 5000 passes / 22 years = 227 passes a year
Let's see... 227 passes a year / 36 weekends a year = 6.3 runs a weekend

THATS REALLY IMPRESSIVE!!!!

Jeff Lee 09-07-2013 08:14 PM

Re: Crank Trigger
 
Quote:

Originally Posted by 1320racer (Post 398587)
the master tech continues to try while failing again, to argue about what he thinks he knows, clearly subjects beyond his experience, over his head and above his pay grade!:p

My engine builder as well as many other nationally known engine builders install 3/8" 1 piece pushrods in the conventional headed BBC super class and bracket engines making upwards of 1100HP!

NO head rubbing, NO witness marks, NO broken pushrods on my current engine seeing 8000 in the lights every weekend, 36 weekends a season for the past 5 seasons, or my previous engine for 17 seasons! Not 1 broken pushrod in 22 years and over 5000 passes racing conventional headed BBCs with 3/8" pushrods!!!


You know, it's really not nice to slam a person's career. Obviously your making snide remarks about Joe being a master tech. I suppose that's not as "good" as being an engineer.
But your company resume' says your a "General Superintendent" and you "studied" Civil Engineering.
I once studied civil engineering as I was a civil draftsman...but I wasn't an engineer

SStockDart 09-07-2013 08:42 PM

Re: Crank Trigger
 
Quote:

Originally Posted by MidwestStocker (Post 398789)
Every weekend???? Really???? Oh you are good???? You can post and race all at the same time???? Maybe you should focus more on racing............

Let's see... 5000 passes / 22 years = 227 passes a year
Let's see... 227 passes a year / 36 weekends a year = 6.3 runs a weekend

THATS REALLY IMPRESSIVE!!!!

I detect a little exaggeration too......Let's be real for a minute....I believe he uses a Sunset Engine.....They build good stuff for Super Gas And Super Comp cars. They are build to last forever (tug boat motor). He has a Super Gas car that he chooses to bracket race. He says he runs it 8,000 RPM, (I believe probably closer to 7100 based on his numbers) so I suspect he uses around a 4.56 gear.
You don't need a lot of valve spring for this RPM and I am reasonable sure that his engine is not running a cam lift that is anything close to a competitive Super Stock or Comp car.

So, at 8,000 RPM, Light valve springs and low lift (relatively speaking). - a 3/8 inch 120 trend push rod should last forever.

Let's be clear here....there is a huge difference between big cube "Super" engines and Super Stock and Competition eliminator engines. If he were to were to run his car in Comp, with all those cubes, would be like A/EA index......wait, his carb is too big.....So he would be around an A Altered/automatic......he can't run within 2 1/2 seconds of these guys.

So when he brags about having a "Rocket" and no crank trigger, no evac system, .....and he doesn't break parts, remember that it is all relative. I have the fastest riding lawn mover in my area and I have never broken a part.....(a little tongue in cheek for ya)

Alan Roehrich 09-07-2013 09:10 PM

Re: Crank Trigger
 
Guys, he thrives on the attention. Let it go.

Kevin Panzino 09-08-2013 12:15 AM

Re: Crank Trigger
 
Quote:

Originally Posted by alan roehrich (Post 398843)
guys, he thrives on the attention. Let it go.


x1000000000000000000000000000000000000000000 :D

randy wilson 09-08-2013 07:22 PM

Re: Crank Trigger
 
Damn, I tell the truth on here about half the time, and I get no where near the attention!

SStockDart 09-08-2013 08:27 PM

Re: Crank Trigger
 
Quote:

Originally Posted by randy wilson (Post 398966)
Damn, I tell the truth on here about half the time, and I get no where near the attention!

Randy, you are way to honest to be on here.....lol

randy wilson 09-09-2013 05:22 PM

Re: Crank Trigger
 
Thanks guy. But the bad thing is, no one will know which half I'm lying about! Ha!

SuperStock 1890 09-09-2013 07:52 PM

Re: Crank Trigger
 
Maybe I can talk about my experience with switching from a billet MSD optispark to a crank trigger while on the dyno. This may not be exactly what you are looking for but since you guys are throwing daggers back and forth maybe something about the topic would be helpful.

I was chasing a top end miss and changed all kinds of crap and it was still there. I had a new crank trigger in the box so I decided to see if it would help clear up the miss. I never even unstrapped the car from the dyno. Got everthing together and set the timing where it was in about an hour and was ready for a pull. There were no other changes. Guess what. I still had the miss. Still scratching my head I pulled up the data. From 4500 to 7400 I picked up 10-14 hp on a stocker except at the points of the miss. I rechecked the timing to make sure I did not find out something by accident. Still where it was with the optispark. Still had the miss but got a little more power. Cooled it down and did it over and same result.

Ed Wright 09-09-2013 08:27 PM

Re: Crank Trigger
 
When I still had my chassis dyno I tested thing like that all the time. You can move the car off the rollers, move it out of the shop. Drive it back in, tie it back down on the rollers, and pick up or lose 5 or so RWHP. Same day also, the built-in weather stations aren't perfect.
I would certainly call that a valid test, and would certainly show up on the track.
Thanks for sharing.

SuperStock 1890 09-09-2013 08:47 PM

Re: Crank Trigger
 
Ed,
The car did pick up while still missing.I did share with you the cause of my miss. After I got that out the car definitly picked up more. I did not think a crank trigger could do that much but I am not taking it off.

SStockDart 09-09-2013 09:28 PM

Re: Crank Trigger
 
Quote:

Originally Posted by SuperStock 1890 (Post 399183)
Maybe I can talk about my experience with switching from a billet MSD optispark to a crank trigger while on the dyno. This may not be exactly what you are looking for but since you guys are throwing daggers back and forth maybe something about the topic would be helpful.

I was chasing a top end miss and changed all kinds of crap and it was still there. I had a new crank trigger in the box so I decided to see if it would help clear up the miss. I never even unstrapped the car from the dyno. Got everthing together and set the timing where it was in about an hour and was ready for a pull. There were no other changes. Guess what. I still had the miss. Still scratching my head I pulled up the data. From 4500 to 7400 I picked up 10-14 hp on a stocker except at the points of the miss. I rechecked the timing to make sure I did not find out something by accident. Still where it was with the optispark. Still had the miss but got a little more power. Cooled it down and did it over and same result.

Valve spring causing the miss?

SuperStock 1890 09-10-2013 06:08 PM

Re: Crank Trigger
 
Nope on the valve springs. The BS3 is sensitive to grounds and I ran a wire from the ignition box to the same spot on the back battery where the BS3 was grounded. Miss all gone after that.

Capri 09-10-2013 07:26 PM

Re: Crank Trigger
 
SBF crank trigger vs locked Dist at 9000rpm was worth more power. It keeps the timing at 1 spot better. Especially when using a timing belt.

At least that what we found out in the "bracket racing" section.

I now understand Ed so much better. Yesterday he couldnt spell engineer and today he is one.

Ed Wright 09-10-2013 09:52 PM

Re: Crank Trigger
 
If you are talking about me, I have known all along how to spell it. Just don't call me one. LOL

Edit: I think some took what I said about 1320 being an engineer wrong. I work with engineers in my business all the time. I do like to kid a couple of them about like being like Sheldon on Big Bang Therory. They aren't , but I tell them they are. Sorry if I offended anybody.

SmBlkFord 09-17-2013 11:21 PM

Re: Crank Trigger
 
A crank trigger can be anywhere from 5-7 hp maybe more maybe less, hp jumps all over the place on its way up to peak rpm without a trigger , its pretty ugly , have seen side by side tests on an engine dyno and I'm sure that anybody who operates an engine dyno will say the same thing .


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