LT1-LT4 Modifications 1993-97 Gen II Small Block V8

Anyone Have Summit Racing TB

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Old Feb 18, 2011 | 12:05 AM
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Default Anyone Have Summit Racing TB

Anyone Have a 52mm or 58mm TB from Summit Racing?

If so, Any good? Any issues?

http://www.summitracing.com/parts/SUM-227701/


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Old Feb 18, 2011 | 12:33 AM
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I can stand behind the Professional Products 58mm TB. It's about the same price as the summit part without being on sale. I know the PP 52mm TB is $210 on summit. I bought my PP 58mm TB from CNCmotorsports about 2 years ago for around $165-$185 though.
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Old Feb 18, 2011 | 07:08 AM
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Originally Posted by 93Z2871805
I can stand behind the Professional Products 58mm TB. It's about the same price as the summit part without being on sale. I know the PP 52mm TB is $210 on summit. I bought my PP 58mm TB from CNCmotorsports about 2 years ago for around $165-$185 though.
I've heard the PP model has had a ton of issues with the blades sticking open. Do a search and you'll find some threads about it.
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Old Feb 18, 2011 | 07:18 AM
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I've had a summit 58mm on mine for a year now with no issues.
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Old Feb 18, 2011 | 08:17 PM
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Yea, i have had issues with Professional Products before as well.. they have horrible sealing issues. On their LS intakes, i have seen them no seal properly and have a hell of a time tuning them and have heard the same for the LT Throttle Bodies as well.. id stick with the Summit one before ever going with them
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Old Feb 18, 2011 | 08:38 PM
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i have had mine for a little over 4 years now. i am 99% sure it is a professional products but it looks exactly like the one in your link. i have never had a problem with leaking or the throttle blades sticking open and this is actually the first thread i noticed that even mentioned it. i have had several people drive my car before and after the TB and the only thing noted was how much better the throttle response was.
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Old Feb 19, 2011 | 12:42 AM
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My PP TB has worked just fine, no leaks etc. I drove it everyday for 2 years. I noticed better throttle response as well. I'm now moving up to a single plane with an LS style TB on an elbow with the EFI Connection 24x. The new manifold, TB, and elbow are all coming from PP. If the TB doesn't work out however, I'll be going to a Wilson elbow and a NW 96mm or 102mm.
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Old Feb 19, 2011 | 07:25 AM
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I'm also curious about people's experiences with the Summit TB. My brother will be at that point later this year, and it'd be nice if he could save some $$.

Btw OP, your car looks good with those wheels and that color combination
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Old Feb 19, 2011 | 08:33 AM
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I've had a Summit 58mm for about 2 years and I havent had one problem with it.
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Old Feb 19, 2011 | 08:40 AM
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I have the summit 58mm polished unit, has been flawless since day 1 and that was 3 years ago.
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Old Feb 19, 2011 | 09:01 AM
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i have the PP which is the same thing as the summit brand. The only problem i had was after driving for a while with the engine hot, then letting it sit, then starting it back up 20mins later or however long, the blades would stick closed and i would have to press the gas pedal a little harder to get it to open that first initial time. then it would work normal. After 1-2,000 miles it worked fine and didnt do it anymore.


it works good. nice crisper throttle response. no issues with the tuning part. that was all pretty easy for my tuner to do. if you have an auto you need to get the shift points changed since you will be using less throttle to move the car. i think all we did was shift the #'s down or up on the tables. so that it shifted like it did originally at 20% throttle but now its at 15%. understand? not those specific numbers but an example.
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Old Feb 19, 2011 | 02:09 PM
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Originally Posted by Badazz 97 TA
i have the PP which is the same thing as the summit brand. The only problem i had was after driving for a while with the engine hot, then letting it sit, then starting it back up 20mins later or however long, the blades would stick closed and i would have to press the gas pedal a little harder to get it to open that first initial time. then it would work normal. After 1-2,000 miles it worked fine and didnt do it anymore.


it works good. nice crisper throttle response. no issues with the tuning part. that was all pretty easy for my tuner to do. if you have an auto you need to get the shift points changed since you will be using less throttle to move the car. i think all we did was shift the #'s down or up on the tables. so that it shifted like it did originally at 20% throttle but now its at 15%. understand? not those specific numbers but an example.
Thanks for the input! I think I'm going with the 52mm because of my limited mods. BTW, whats with the "24.2@70mph" in your sig?
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Old Feb 19, 2011 | 03:59 PM
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The summit one is Trickflow. They work well.

I've seen no first hand issues w the pro products either
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Old Feb 20, 2011 | 11:40 AM
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Like gregrob siad trickflow makes the summit 1. Im running the trickflow 1 with out any problems
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Old Feb 20, 2011 | 07:37 PM
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Sounds like that might be the way to go, thanks!
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Old Feb 21, 2011 | 06:26 AM
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I had a 58 summit on mine with no issues. It's for sale too $175 + shipping

Going ls platform so have many good LT1 parts for sale.
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Old Feb 27, 2015 | 12:59 PM
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Default tb sticking with summit

Originally Posted by Big Bad Bud
Anyone Have a 52mm or 58mm TB from Summit Racing?

If so, Any good? Any issues?

http://www.summitracing.com/parts/SUM-227701/


I just bought a tb from summit knowing that it has some stic sticking issues I called them and told them it sticks between 1000 to 2000 and the guy on the phone said he never got complaint about sticking issues .what are u gonna tell him now? is it possible that none of the guys here who have sticking problems have not called and let them know about it yet?
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Old Feb 28, 2015 | 11:04 AM
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Originally Posted by Big Bad Bud
I think I'm going with the 52mm because of my limited mods.
If going 52, I would and did, have my stock 48 bored to 52. None of the idle air passage issues most aftermarket TB's have.

you will need to get PCM re-tuned for the larger TB, especially on a A4 car
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Old Feb 28, 2015 | 11:14 AM
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...this thread is 4 years old...
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Old Mar 1, 2015 | 12:06 PM
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I got the summit one and it works great for me
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