FOR ANYONE WITH THROTTLE BODY AND PLENUM QUESTONS
10-01-2007, 07:24 PM
#11
RE: FOR ANYONE WITH THROTTLE BODY AND PLENUM QUESTONS
I installed my Accufab 75mm combo, and I could really feel the difference from the mid-range all the way up to redline, on my near stock 4.6. Don't have any dyno numbers to prove it, however.
10-02-2007, 09:41 PM
#16
4th Gear Member
Join Date: Dec 2006
Location: pa
Posts: 1,420
RE: FOR ANYONE WITH THROTTLE BODY AND PLENUM QUESTONS
ORIGINAL: waggs
it's the part that goes right after the tb.
ORIGINAL: y2kStangGT
what is a plenum?
is it part of the Tb?
what is a plenum?
is it part of the Tb?
10-02-2007, 11:22 PM
#18
6th Gear Member
Join Date: Nov 2004
Location: Tennessee
Posts: 7,797
RE: FOR ANYONE WITH THROTTLE BODY AND PLENUM QUESTONS
ORIGINAL: eventer289
Because the motor is able to take in more air than it could with a stock th/plenum. If the computer is not tuned to compensate, the car injects the same amount of fuel as it does stock, but with increased airflow, which in turn causes the a/f ration to lean out.
ORIGINAL: NetChemica
Why would a bigger throttle body lean you out? Is there air sneaking in past the MAF sensor?
ORIGINAL: GTowner4life
I read a 75mm T/B will lean out your car up to 30% And because my car isa N/A wouldnt a 70mm T/B lean out the car less and still give you the same Throttle response? What about MPG?
I read a 75mm T/B will lean out your car up to 30% And because my car isa N/A wouldnt a 70mm T/B lean out the car less and still give you the same Throttle response? What about MPG?
Why would a bigger throttle body lean you out? Is there air sneaking in past the MAF sensor?
02-03-2008, 10:30 PM
#19
1st Gear Member
Join Date: Jul 2007
Location: Florida
Posts: 87
RE: FOR ANYONE WITH THROTTLE BODY AND PLENUM QUESTONS
for anyone who thinks of it look at it this way a n/a engine sucks air into the engine. So the better the flow the more air sucked in. Your maf is there to measure the amount of air coming in and to adjust the spray of the fuel injectors accordingly. So to a certain extentyour car will read the more and air and supply more fuel to the standards set by the company.I think it's safe to say you can not lean out a good working condition engine by adding a tb/plenum kit since our engines are fuel injected and controlled by computers but i could be wrong because this is just on my own experience. I don't see any way you could buy one so free flowing to make your engine ping or to lean it out enough as say 30% just my .02 on the worries of leaning out please feel free to correct me if i'm wrong. 
