Aftermarket Throttle Body

[jderry]

I am still using my stock 48mm TB.
Are the gains of going to a 52 or 58 worth the price tag?

[mcalus]

Curious as well, although are you still running stock injectors? I would assume that would better gains after a tune. I have gotta be pretty close to maxing out stick injectors and you're running a bigger cam than me.

[ryanwarby01]

If you go with a 52mm, just port the stock tb. If you go bigger, I cannot recommend this tb strong enough: http://www.tpis.com/parts/view/49 . I've used BBK and Holley and neither even come close to the TPIS. The throttle is so much crisper and I had iac issues with the Holley. It is a night&day difference in quality compared to most on the market. Just my .02

[jderry]

Stock injectors, fuel pump, TB.
I was planning on injectors after I get my NX kit from Jonny at the begining of next month.
Tax refund money will probably go to a set of ET Streets =)
Shooting for some 11s soon.

[JoeliusZ28]

Is there any benefit to a bigger TB without a bigger maf?

[JoeliusZ28]

Is there any benefit to a bigger TB without a bigger maf?

Anyberdy? Or any engineer types here that can calculate if the stock LT1 TB flows comparably to a stock LS1 TB (which is the same size as a maf i believe).

[jetice]

If I could get my hands on one of each, I could tell you in 2 months.

[birdie2000]

Anyberdy? Or any engineer types here that can calculate if the stock LT1 TB flows comparably to a stock LS1 TB (which is the same size as a maf i believe).

If you haven't already, read Ed Wright's posts on LS1Tech about throttle body size. Interesting results.

[BP_Z28]

If you haven't already, read Ed Wright's posts on LS1Tech about throttle body size. Interesting results.

post a link

[birdie2000]

http://ls1tech.com/forums/lt1-lt4-mo...-355-dyno.html

I'm sure there's more, but this is the most recent I've seen him bring up his results. Make sure to read the whole thread, he makes a couple posts sharing his experience.

If you don't know him, he was tuning LT1s before most of us here had our license.

edit: Here's a few more from him, some with discussion of MAF size too:

http://ls1tech.com/forums/lt1-lt4-mo...ck-engine.html
http://ls1tech.com/forums/lt1-lt4-mo...ody-worth.html
http://ls1tech.com/forums/lt1-lt4-mo...-vs-stock.html