my question is, i think wouldent the tps signal sent to the computer be way off with the addition of one of these because of the much larger amount of air passing thru at the same position.therby causing the need for more fuel necessary ?it would also effect anything else that uses the tps senser to ajust paramiters it would seem.would the easy answer be to reburn the chip with a different injecter constant? this question arrises because it seems that the consenses is that a larger tb will help airflow even in my supercharged application. anyone have any reason not to install a 58mm tb?
thanks
pete

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1990 Trans Am,350 TPI(L98),WS6suspension ,bridgestone RE71's /245/45/zr16
edelbrock manifold,asm ltr's
paxton supercharger,afr 190heads, alston sfc's,msd 6AL-BTM,
8.5 superconductor wires SLP 1-3/4 headers,duel cats,3"slp exaust, lakewood LCA's,T.B.Bypass
160 degree stat,alum driveshaft,fiberglass wing,custem chip by me!

"if you cant win fair CHEAT"

[This message has been edited by blowen90ta (edited September 23, 2001).]

[This message has been edited by blowen90ta (edited September 23, 2001).]

 

To put a large TB on a stock engine is folly. You want some *ram* effect from the air velocity. It's not a case of bigger being better. Now if you engine noticeably makes more HP then it will need a given increase in air flow at a given throttle opening.

In S/C, T/C applications when in *boost* you'd have to have a miserable manifold to need to use butterfly diameter to balance out the airflow. There are lots of Turbo Buicks making 2-3x the stock HP and still use the stock throttle body.

If this is a street car, then another consideration is what the car will drive like when not in boost. WOT and in serious S/C T/C is something that you just can't use really often in metropolitian areas <g>...

 

Have you ever heard of what a camel is?.


A horse designed by committee.

Point being anything designed by a *group* effort, can really wind up *rather odd*.

 

thanks grumpy--i was of the same train of thought-that a supercharged app would not need a bigger tb(the only reason i was going to install one was because in polishing my intake seems that a billet holly would look great upfront). i have been burning chips since only this spring and seem to have made great strides in compensating for the changes i had already made ie; supercharger,afr heads,headers'30lb injecters,edelbrock manifold and asm ltr's,
after lots of reading,and compiling a big book of information.by scanning my car and burning over 100 chips to get where i am at today.I DONT WANT TO START OVER.because of changing somthing that will provide little or no gain and just throw off the computers data.
so it looks like if anything i'll go with a 52mm and hope a small injecter constant change will keep things close.

 

Your ignoreing the mechanics of things.
If you think about the injector constant thing you'll see what I mean. The TB will allow faster air flow changes at lower throttle openings, change the injector constatnt to be right there an that will be the opposite of what you want at WOT. Just because you add a larger TB doesn't mean the engine will use it. Lots of issues. I know lots of cases of cars slowing down when going to a hiflow TB.