mike13

iTrader: (27)

Today I just happened to be datalogging my car and noticed the tps was only going to 92% when I was working the petal with the motor off. Come to find out I didn't have my throttle cable adjusted correctly and the throttle wasn't going all the way to the stop.

It's been raining so I haven't had a chance to see if the difference is noticable what do you guys think?

stock motor with patriot LQ9 heads, 9psi w/T76 turbo.

hawk584

iTrader: (1)

good find for sure

vette0009

And Voila !

I love those free ponies Best

Bon

mike13

iTrader: (27)

I know it was like it was my birthday.

kagato

Nice find man, its one of those things you would never think to check in a million years. how do ya think you got it out of adjustment in the first place?

kdavis

iTrader: (14)

i had a similar experience, but mine was an old cell phone under my carpet.

Nitroused383

iTrader: (10)

WTF man? Lol that is so funny.

mike13

iTrader: (27)

From working on the car, I'm always tinkering, I always check to make sure the throttle closes all the way but not if it goes wide open.

BadgeZ28

iTrader: (28)

Glad you found it. Stock throttle bodies often don't allow the blade to reach horizontal position at full throttle. I don't know how much impact this has, but a simple removal of material from the stop takes care of it.

mike13

iTrader: (27)

I'm hoping it has an impact because the arm wasn't even going all the way to the stop. I know what your saying about the blade but I'm just talking about I wasn't using the full range of the throttle with a unmodified stop.

dschmittie1

iTrader: (64)

The best is when you I get customers that come in(I work at a dealership) complaining about poor acceleration and the floor mat is under the gas pedal preventing it from going all the way down. And yes I have seen this more than once.

stevieturbo

Going from 92% opening to 100% opening will have absolutely no effect on power IMO.

In fact, given most TB's flow enough for say even 1000bhp when boosted....even 75%-100% will make negligable difference once the engine is "on boost" as the TB opening is already letting in all the air the engine can consume

mike13

iTrader: (27)

your logic makes sense but if a tb is good for 1000bhp why doesn't a 500bhp combination not make full power at half throttle?

stevieturbo

Who says it wont on a turbocharged setup ? Have you tried ?

mike13

iTrader: (27)

Yes, my 500whp car does not make full power at 1/2 throttle. If that logic applies than a 500whp car should only need half throttle at the big end of the 1/4 mile to et and mph the same speed as wide open.

I don't what the answer is but there seems to be more to it.

mike13

iTrader: (27)

Maybe someone can jump in and explain this, I don't doubt it could be true that's why I started with "I think" and "I hope" there's a hp difference.

caMnaro

iTrader: (24)

key part



You are already have 9 psi forcing air past the blade at wide open, which was 92% for you. Now going to 100% open at 9 psi it still should be forcing the same amount past the blade.

barnat

iTrader: (59)

This is exactly what i was thinking too,but you beat me to it guy LOL I know only haveing 92% will mess with your auto trans function as i had a aftermarket Accufab TB that was only showing 90% no matter what i did because of the desighn i guess LOL Jerry Farmato, while tunning it last year pointed this out to me while he was trying to tune it and exsplained how the TPS signals actually controls shift points and clutch pressures in the auto trannys. We even tryed boreing out the TPS sensors mounting holes which still wasnt rightI ended up just putting on a ported stock TB and was good to go after that LOL He said i wasnt alone with this issue,about 7 out of 10 guys that he tunes for that run afternarket TB's all have this problem which cant be tunned out Just figuired ide share this while were on the TPS subject LOL

98Z28CobraKiller

iTrader: (17)

TPS % triggers many things in the tune including power enrichment mode. I believe that most if not all are met by 92% though. I believe that the 50% TPS comment was an exaggeration.

barnat

iTrader: (59)

just a bit? LOL I know once mine was at 100% with a stock ported TB ,i could definaltly feel more crisper trany shifts as when it was only showing 90% for me with the Accufab TB at WOT