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-   -   Max Speed/under carb throttle atops. (https://classracer.com/classforum/showthread.php?t=85566)

Phil S/ST 08-23-2023 10:35 AM

Max Speed/under carb throttle atops.
 
My build is almost ready. I've used a linkage stop in past but I want to upgrade. The APD Max Speed carb is my first choice, 2nd would be their carb and plenum stop but I'm weary of the fuel going through the stop. This is the set up Luke Bogacki is running which gives me a little more confidence. 3rd choice would be 1# Stop and probably a APD, ATM or Stinnett 1050 carb. This set up is for a Super Street/Hot Rod car 505 BBC. Curious as to what other guys are running especially the Max Speed. ThanX

ausby 08-23-2023 03:13 PM

Re: Max Speed/under carb throttle atops.
 
ive been using a deadenbear ts-5 under carb stop. its probably older than i am. 565 with a 1050 alky carb. just got a #1 stop and it looks really nice. gonna see how it does in bowling green this weekend. ive never used an inline stop before sorry i cant help there.

1320racer 08-23-2023 09:13 PM

Re: Max Speed/under carb throttle atops.
 
Most I know that were running the Max speed have long sold it and those that I know running APD engines have their plate stop, NOT the Max speed.

I run a #1 electric stop and ATM carb on both my S/C dragster and S/ST Firebird

Tom Goldman 08-24-2023 09:52 AM

Re: Max Speed/under carb throttle atops.
 
APD tends to push Max Speed carbs that are way too large for the engine application. I borrowed a early Max Speed 1050 a few years ago and had great success with it on a 582 engine . When I had them build me one they sent one that was much larger in CFM ,the consistency was not there and it had to be run at a much higher cruise RPM.
I now use a Stinnett baseplate stop from Number 1 Stop and a ATM carb built for my combination. Deadly consistent and absolutely the best fuel curve I've ever seen while on the stop. ATM also makes an excellent baseplate stop.

Phil S/ST 08-24-2023 01:54 PM

Re: Max Speed/under carb throttle atops.
 
Tom Goldman I've watched the Stinnett videos on Luke Bogacki's site and the smaller carb theory seems the way to go. Brian at ATM was very helpful and so was Joey at APD. Since its a large $$ purchase, I only want to make it once..lol!! I still need a data logger also.

Tom Goldman 08-24-2023 05:05 PM

Re: Max Speed/under carb throttle atops.
 
Quote:

Originally Posted by Phil S/ST (Post 684943)
Tom Goldman I've watched the Stinnett videos on Luke Bogacki's site and the smaller carb theory seems the way to go. Brian at ATM was very helpful and so was Joey at APD. Since its a large $$ purchase, I only want to make it once..lol!! I still need a data logger also.

Phil , going from a 1150 carb to the ATM 1050 I only lost about 1 -11/2 mph and I made that back up by being able to run a lower cruise rpm .

Average Joe 08-24-2023 09:06 PM

Re: Max Speed/under carb throttle atops.
 
Order a Stinnett carb and then call Gary Heuer at Number stop to get a throttle stop. Gary Heuer is a great asset and so helpful.

1320racer 08-28-2023 12:03 PM

Re: Max Speed/under carb throttle atops.
 
Quote:

Originally Posted by Tom Goldman (Post 684932)
I now use a Stinnett baseplate stop from Number 1 Stop and a ATM carb built for my combination. Deadly consistent and absolutely the best fuel curve I've ever seen while on the stop.

Same here on both my cars.

I don't subscribe to the smaller carb theory and we have done very well.

Charlie Yannetti 08-29-2023 11:03 AM

Re: Max Speed/under carb throttle atops.
 
I recently purchased a billet stop from #1 Stop.. it has all the bells and whistles as the Stinnet and APD stops.. Gary is great to deal with, will pre-set your stop to your combination, and will save you money over the other brands.. I also found the billet #1 Stop to have a bit more consistency over the #1 Cast Stop, which is also good if you don't want to spend for the billet stop.. #1 STOP is highly recommended..

J&S Racing 08-29-2023 02:25 PM

Re: Max Speed/under carb throttle atops.
 
I’ve been running the max speed for a while. It takes time to get the jet/restrictors tuned but it’s deadly once you get it.

Phil S/ST 08-30-2023 09:08 AM

Re: Max Speed/under carb throttle atops.
 
Quote:

Originally Posted by J&S Racing (Post 685240)
I’ve been running the max speed for a while. It takes time to get the jet/restrictors tuned but it’s deadly once you get it.

Are you using a data logger??

Phil S/ST 08-30-2023 09:26 AM

Re: Max Speed/under carb throttle atops.
 
Quote:

Originally Posted by ausby (Post 684905)
ive been using a deadenbear ts-5 under carb stop. its probably older than i am. 565 with a 1050 alky carb. just got a #1 stop and it looks really nice. gonna see how it does in bowling green this weekend. ive never used an inline stop before sorry i cant help there.

Looked at the # from Bowling Green and the 60, 330 and ets all looked great! Thay repeated really nice!

J&S Racing 08-30-2023 12:16 PM

Re: Max Speed/under carb throttle atops.
 
Quote:

Originally Posted by Phil S/ST (Post 685276)
Are you using a data logger??

Logger with O2 is a Must have running the max speed

Phil S/ST 08-30-2023 01:23 PM

Re: Max Speed/under carb throttle atops.
 
Quote:

Originally Posted by J&S Racing (Post 685284)
Logger with O2 is a Must have running the max speed

Did you buy your carb new and how long was the tuning curve to get dailed in? Thanx

J&S Racing 08-30-2023 03:26 PM

Re: Max Speed/under carb throttle atops.
 
Quote:

Originally Posted by Phil S/ST (Post 685288)
Did you buy your carb new and how long was the tuning curve to get dailed in? Thanx

I had a stock Holley 1050 turned into a 1150 max speed. Honestly I struggled for a while but it turned out to be my converter. Last few times out with the new converter the car was deadly.

1320racer 08-31-2023 05:16 PM

Re: Max Speed/under carb throttle atops.
 
my advice is don't go with it, go with a plate stop. Either #1, APD or ATM.

Lenny5160_v2 09-01-2023 11:21 AM

Re: Max Speed/under carb throttle atops.
 
Quote:

Originally Posted by 1320racer (Post 685352)
my advice is don't go with it, go with a plate stop. Either #1, APD or ATM.

Agree. I'm pretty sure the APD 'house cars' don't even run Max Speeds.

1320racer 09-01-2023 11:29 AM

Re: Max Speed/under carb throttle atops.
 
They don't and neither does a multi time, divisional winner, Jegs AllStar and top 3 in the world who accomplished all that with the Max speed as well as numerous other very accomplished racers who did and don't anymore.

Phil S/ST 09-05-2023 11:37 AM

Re: Max Speed/under carb throttle atops.
 
Quote:

Originally Posted by 1320racer (Post 685393)
They don't and neither does a multi time, divisional winner, Jegs AllStar and top 3 in the world who accomplished all that with the Max speed as well as numerous other very accomplished racers who did and don't anymore.

Bogacki is running a plate stop!! Leaning toward a Stinnett setup or APD although ATM has been very helpful on the phone. Its a tough call, like picking a converter builder..LOL ThanX for all the input.

ausby 09-06-2023 01:57 PM

Re: Max Speed/under carb throttle atops.
 
unloaded in indy with a 9.92 then went 9.895 then 9.912 i went red so it didnt matter after that. love the new stop i got from #1 stop.

Mark Yeager 09-06-2023 04:41 PM

Re: Max Speed/under carb throttle atops.
 
I have run the 1450 Max speed and it worked pretty good on my 622 with a lot of testing, then I switched to a 1150 Stinnett w #1 Stop, and that worked a little better w/ no testing. Now I'm running a Stinnett 1050 w/ #1 Stop and It's Awesome. (I didn't even adjust the idle on the 1050)

Both Gary's are great to work with, and answer their phones.

For what its worth, I have had zero mph loss by going to the smaller carb. I can run the stop lower with the 1050 and have it come on sooner. I'm a big fan of the smaller carb.


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