throttle body up grade
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Heel & Toe
Joined: Apr 2016
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Team Owner
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From: Athens AL
C7 of the Year - Unmodified Finalist 2021
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You have zero need to upgrade your TB until you've upgraded the rest of the intake system. Once you've enlarged the plenum/runners/base, you may see some small gains from a TB change, but this is not a part that gives you a bunch of HP even then.
If you change to MR, you will need to do a lot of things as well to get the combination correct. Dont know if your current injectors to feed the cam you have are enough with this added airflow, and finally a chip tune. Do not just blindly swap a MR on there without thinking out what you want from the car.
If you change to MR, you will need to do a lot of things as well to get the combination correct. Dont know if your current injectors to feed the cam you have are enough with this added airflow, and finally a chip tune. Do not just blindly swap a MR on there without thinking out what you want from the car.
Last edited by vader86; Jul 17, 2018 at 09:00 PM.
Burning Brakes
Joined: Jul 2012
Posts: 897
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From: Poughkeepsie, NY
I upgraded to the Holley 52mm only because the shaft on my original was sticking and another forum member was selling one.
Noticed a little better throttle response but overall the same performance.
Mine is a stock 89'
Noticed a little better throttle response but overall the same performance.
Mine is a stock 89'
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From: Hartford WI
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From: Park City Utah
:agree:
Sure...but you've got a 600 hp motor, or so.
Only reason why you'd put a TB on a stock or stockfish TPI would be to have more throttle reaction/response. Is it worth it? Probably not. For the price of a TB you could buy a cam which would increase power 10X more than a TB will.
Only reason why you'd put a TB on a stock or stockfish TPI would be to have more throttle reaction/response. Is it worth it? Probably not. For the price of a TB you could buy a cam which would increase power 10X more than a TB will.
Melting Slicks
Joined: Apr 2007
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I agree. 48 mm is what GM has on the LT4 cars in 96. I think they flow nearly 660-700 CFM.
More than enough for a 350 TPI car at 230-250 hp. Even if you are making that at the wheels with your upgrades, that’s plenty of throttle body.
More than enough for a 350 TPI car at 230-250 hp. Even if you are making that at the wheels with your upgrades, that’s plenty of throttle body.
Last edited by 856SPEED; Jul 20, 2018 at 03:10 PM.