Turbo Stockers
 

In the 2010 rules amendments they have added for turbo stockers:


By housing bore do the mean the inlet of the compressor housing? And they are measuring the id of the inlet right in front of the compressor wheel? Just making sure I am interpreting this correctly.

Re: Turbo Stockers
 

I doubt they know. When they did mine they never had a clue. Even though I gave them a turbo to measure. and count vanes etc. The next time I came apart. They had forgot about it and didn't do a thing with it. It was a junkyard unit with a lot of play. But the exact same as the one I had. They were more obsessed with my piston being .375 to high (LOL).
A mistake in their books, which eventually was corrected.

PS If all they are going to check is size. I can make a stocker run 3 seconds under Every turbo car I know runs a stock turbo. not a "stocker turbo". If you cheat a turbo on some cars you would fly. There is a lot more to a turbo other than how much boost you can run.
It's more about how quick you can get the boost.

Re: Turbo Stockers
 

With the stock turbos that shouldnt be a problem! Getting the boost the same every pass to actually win a round is the real challenge!

Re: Turbo Stockers
 

My car used to be consistent. The only problem was the nut behind the wheel Some people went rounds with turbo cars.
If you think about it how many consistent number 1 qualifiers go rounds? Whether turbo, supercharged or naturally aspireated

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If they are clueless about "size" I bet they will have fun with altitude et/mph corrections for turbo and supercharged sportsman cars.

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Prior to this rule the only turbo rule I have seen in stock is the header rule. Header permitted, turbo must remain in the engine bay. Art, do most or all the turbo dodge guys run the stock exhaust manifold?

Re: Turbo Stockers
 

All that I know.

Re: Turbo Stockers
 

I run the stock manifold, ported. I don't see the advantage of adding volume between the port and the turbo. You'll only lose energy (heat). If you made a real short, real thick wall header, it might be better due to balancing the flow between cylinders. Obviously a custom ($$$) part...

Re: Turbo Stockers
 

Indeed. I view an exhaust port of a turbo engine similar to an intake port. Make the x port too large, and all you are doing is reducing velocity. I am not positive that playing with runner length for a small turbo would make a large difference. I am certianly not going to spend the money if I am facing being too fast anyway. There is a really nice cast manifold for my setup that I will most likely use.

Re: Turbo Stockers
 

There was one car in front stock a few years ago that had the turbo mounted in front of the motor. He got through tech. But I belive he was lucky. Haven't heard about the that car
for a few years.
Most of the cars I know use a stock or slightly modified stock manfold

Re: Turbo Stockers
 

Guys, if ya don't mind I would like to join in on this conversation. I have just started running an '88 thunderbird 4 cylinder turbo car and would love to ask some questions. I'm an IHRA car in I/FIA but could fit in H/I/J with weight.

1.) Assuming you are using a two-step, what rpm are you able to leave at?

2.) How much difference, if any, have you noticed with engine temperature being higher or lower in your et's?

3.) How in the heck do we figure out how to dial these things? I have noticed if we are running pretty close my car seems to fall off .05-.10 every pass. Is that pretty normal?

Thanks for any help

People tell me to just put a small block in it and forget this turbo stuff. But, I do like a challenge!

Re: Turbo Stockers
 

Sounds like your having an electronics issue. You can not fight the computer, you have to fool it

Re: Turbo Stockers
 

What brand of computer are you using.

Re: Turbo Stockers
 

Stock Ford computer, MSD Ignition box.

Re: Turbo Stockers
 

How much boost are you getting out of it.

Re: Turbo Stockers
 

Also auto or stick.

Re: Turbo Stockers
 

21 lbs. max. only 11 lbs. off the line. Automatic transmission conversion, car came stock with manual. max. rpm off the line is 2800 or it starts rolling the beams any higher. stock brakes and master cylinder.

Re: Turbo Stockers
 

Whats your 60' and ET.

Re: Turbo Stockers
 

Are you running it up against a 2 step on the line?

Re: Turbo Stockers
 

two-step/ yes

i will get the log book this afternoon and give you guys the incrementals

thanks again for the help; i really want to make this work

Re: Turbo Stockers
 

Try disconnecting the battery just before making a run. This should put the computer in open loop (learning mode).
I had to do that on one of my turbo cars. If I didn't it would slow up at least 1 to 1.5 tenths no matter what temp air etc.

Re: Turbo Stockers
 

Art, thanks for the tip. Disconnect pos. and negative sides? We are running a 4:88 gear. shifting at 5800 1st to 2nd and 5800 2nd to 3rd.

60' 1.76
330' 5.29
1/8th mile 8.37
1/8th mph 79.53
1/4 mile 13.37
1/4 mph 97.34

Re: Turbo Stockers
 

Marc ,You can make 11 lbs @ 2800 against a 2 step?
How long does it take to get there?

Re: Turbo Stockers
 

I like to know also.

Re: Turbo Stockers
 

How? Heck I don't know! :)

Like i said, I just started this deal; sounds like I shouldn't be getting that much? I will pay closer attention this weekend. Hope to test on Friday and we have a combo race Saturday where I will try and get as much info for you guys, just tell me what to look for.

I do go to full throttle as soon as i stage to get the boost as high as possible. Do you think it would help to add brake pressure and be able to leave at a higher rpm?

Re: Turbo Stockers
 

Sounds kinda high for the RPM. I can make 6-7 @ 3500 .The brakes won't hold higher than that. I'm working on a smaller diameter converter right now. I figure it'll take 4000 rpm to get to 10-11 lbs.
You said "stock brakes" . Is that stock vacuum assisted brakes?

Re: Turbo Stockers
 

Don't fool it, just reprogram it!

Re: Turbo Stockers
 

What he said^^^^^

If everything goes the way it suppose to and I get out there in Stock next year, it will be my first reall attempt at bracket racing a turbo car. I am a little afraid that .05 off will not be to uncommon. I think the boost off the line will be the key.

Ah well, I have no grandiose dreams of going rounds unless heads up runs. A record, and a number 1 qualifying spot will be my goal next year. From there I will see if I will campaign the car a second year, or move on to a consistent car.

Re: Turbo Stockers
 

Best of luck. have fun.
One thing I believe to be true is, don't mess with the hairdryer. All the cars I know that don't do that, are consistent. My car almost always ran the number (within a hundreth or two). But my reaction times were so bad I couldn't go rounds.
Mark Poole in a turbododge finished in second place points in stock/superstock combo 2 years in a row at the "Hill" in Nashville. And there were a bunch of heavy hitters running there back then. So you can go rounds. My car was most consistent running it hard, running overweight but not shortshifting or playing with the boost..

Re: Turbo Stockers
 

You ran a manual boost controller, right? Not computer control? I think that helps. The computer has adaptives that are always adjusting the wastegate to keep the boost (and knock) under control. I'm going to turn off all the adaptives this year and see if I can't get some consistency out of the thing. It's really strange - it will run severals passes in the same range, and then it will be off 0.2 for no apparent reason. I think it's the computer trying to take over...

I also think boost and traction off the line are key. Because turbos need load to spool; the better your traction, the faster the boost will build. I think getting the traction off the line consistent is key. And, that's doubly hard if you're FWD becuase the 'groove' is 8ft behind your slicks...

Re: Turbo Stockers
 

Rob, have you tried the battery disconnect method? going to test Saturday and def. try this out. What about rear tire pressure? currently runnin 14 lbs but we're gonna try to play with that saturday too. What gauges you guys want me to look at and note? Want to bring all the information back to the forum that i can. I too just want consistency and then we'll start worrying about "other" stuff.

Re: Turbo Stockers
 

When you are talking about computer controlled boost, are you speaking of electronic boost controller, or the factory computer. Sorry, do not know much about turbo dodges. I havent decided what boost control I am going to run. Im sure at first it will be a manual.

Re: Turbo Stockers
 

What brand of car are you building.

Re: Turbo Stockers
 

Plymouth, Mitsubishi, or Eagle. Haven't decided what I am badging it yet lol. :confused:

Since this is my thread, I don't mind going off topic. I am having troubles deciding between running the trim for the Plymouth Laser, Mitsubishi Eclipse, or Eagle Talon. Multiple reasons for and against. The Plymouth, and Eagle brands are defunct. Mitsubishi... Well, forced induction in class racing already has a stigma of its own, don't really want to add any more fuel to the fire. I lean toward Plymouth, because I grew up on Mopars, and my father runs Super Street in Div 3 with a Challenger. They also weigh the least. Eagle, is my personal choice as far aesthetics go. The car I am starting with is a Mitsubishi, so it would require the least work before paint. It would also be nice to run a car that the manufacturer is still in business.

So any input?

Re: Turbo Stockers
 

again, i don't mean to hijack this thread...if u want me to start a new one i will. Tested Saturday and got some additional info. Car went it's best pass so we're apparently making strides.

60' 1.714
660' 8.19 @ 81.12mph

two-step @ 3000 rpm gettin 9lbs boost at the starting line; fuel pressure turned up to 50lbs. shifting at 5800

Think we blew a head gasket but haven't taken it apart yet.

Seems the battery disconnect was helpful but still want to get more data to confirm it. car was pretty dang consistent all day.

Thoughts???

Re: Turbo Stockers
 

You need to get an EGT gauge. And tune with that.
The head gasket is usually the first to go, but the valves and the pistons are usually soon to follow

Re: Turbo Stockers
 

Ford SVO use to make turbo hp head gasket for your motor.

Re: Turbo Stockers
 

We have an EGT. What numbers shall I get you from that. I will look into the SVO gasket.

Re: Turbo Stockers
 

Isnt the correct gasket for the SVO
turbo 4cyl FEL PRO- 1035???

Comp 387

Re: Turbo Stockers
 

Sounds about right on the boost . You ARE working with more CFM than I am.

Yes, 1035 Felpro is the wire ring gasket. About $50. Haven't kicked one out yet. Change the bolts every third install. Every time, if it's in the budget.