72151 Throttle body
Team Owner
Joined: Sep 2003
Posts: 25,413
Likes: 2,745
Le Mans Master
Joined: Aug 2007
Posts: 8,735
Likes: 414
From: WV
If your thinking of installing a larger TB to increase power, forget it , unless you go over 400 hp the stock TB is plenty..I'm right around 400 hp and running the stock TB without any problems...WW
Pro
Joined: Jun 2002
Posts: 662
Likes: 2
From: chatam nj
Not sure I'd agree. I bored my stock tb to 52mm. the throttle response was worth the upgrade IMO, motor has about 350-370 hp. The 52mm will accommodate future mods.
Last edited by silvvette; Aug 1, 2015 at 03:47 PM.
Drifting
Joined: Sep 2014
Posts: 1,579
Likes: 59
From: Trieste Italy
I had to replace TB cause i've a problem on it... Stock engine 52mm would work fine on mine?
Team Owner
Joined: Jul 2004
Posts: 28,502
Likes: 3,302
From: Hartford WI
I'd buy a 1000cfm unit and get it over with if you are planning big mods for the future. OTOH, 52 is plenty for a stock unit. I had a friend that told me on back to back runs, he lost time by going to the 1000cfm unit ONLY. My thought is that without supporting mods, you could create a problem. I changed intakes and added headers and that was what Lingenfelter had at the time and what I had him tune for. Now that I have a 383 making about 420 at the wheels, I would think it is ok.
Drifting
Joined: Sep 2014
Posts: 1,579
Likes: 59
From: Trieste Italy
I'd buy a 1000cfm unit and get it over with if you are planning big mods for the future. OTOH, 52 is plenty for a stock unit. I had a friend that told me on back to back runs, he lost time by going to the 1000cfm unit ONLY. My thought is that without supporting mods, you could create a problem. I changed intakes and added headers and that was what Lingenfelter had at the time and what I had him tune for. Now that I have a 383 making about 420 at the wheels, I would think it is ok.
Team Owner
Joined: Jul 2004
Posts: 28,502
Likes: 3,302
From: Hartford WI
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Drifting
Joined: Sep 2014
Posts: 1,579
Likes: 59
From: Trieste Italy
...that's all, IMO car is running very good as lt1 stock unit so 52mm should work fine for me...
Just a question stock intake manifold has which holes size? 48mm?