Throttle body too big?

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11-13-2008, 11:12 AM

#11

RVC

Thread Starter

Join Date: Aug 2008

Posts: 41

Yeah...it is only 5mm. I just always see the MAF being the larger of the two. This is how the car came when I got it. If it's worth spending the money for a new one I will. I don't care about the cost. Thanks for the help.

11-13-2008, 11:20 AM

#12

Timspony

SVT Section Moderator

Join Date: Jul 2008

Location: Burnt Hills, NY

Posts: 15,601

go with the 65mm TB..........

11-13-2008, 11:21 AM

#13

Project 5.GO!

2nd Gear Member

Join Date: May 2008

Location: Florida

Posts: 478

Quote:

Originally Posted by 302army187

BBK 70mm throttle body, smooth out the metal where the IAC sensor mount's up if you dont want it to wistle.

good luck.

Do you mean the edges of the hole on the inside of the TB where the IAC mounts? If the edges of the hole are sharp will that make it whistle?

Just asking because I have a new TB that is waiting with a couple other parts for my built engine, and I wanted to have everything ready to install.

11-13-2008, 11:50 AM

#14

Joel5.0

5th Gear Member

Join Date: Jan 2006

Location: Puerto Rico

Posts: 3,926

Quote:

Originally Posted by RVC

If the system (MAF, air pipe and ECM) are calibrated to work with the injectors you have set, the 80mm TB will not affect the MAF. Lets say the 80mm flows more than the intake setup..... what will be the bottleneck? ......the MAF? The sensor will continue to work under its transfer curve and measure the g/s of air going through it as usual......... simply b/c the TB is a regulating valve now, if you monitor its signal, and see it is pegged (maxed out) @WOT..... time for a new MAF.