96-98 GT T/B question

jimbogt97 · 03-12-2003, 05:18 PM

I have heard that the '96-'98 GT throttle body is really 55mm on the inside even know that it is rated at 65mm. Is this true? Is a stock '99 & up throttle body bigger? I am doing a PI head/cams/intake swap very soon. I was planning on using the stock T/B on my '97 with the PI intake. I can get a '00 stock T/B for almost nothing, Is it worthwhile to use the '00 instead of the '97 T/B?

Thanks
JIM

explicitone · 03-12-2003, 05:22 PM

I would get the 99+ tb to go with the swap and the 99+ is a 65mm I dont know about the 96-98 tbs

are you getting the heads p&p before you put them on
if so I would go with a 70mm

elhombre · 03-12-2003, 06:24 PM

i was under the impression that the stock T/B was 63mm on the inside. oh well, i replaced mine with a Ford SVO 75mm and it made a noticable amount of difference. if you are doing a straight swap then the 99 T/B will be fine. if the PI heads are going to be P&P, then you definitely want to go bigger. what about your MAF? just something to think about. good luck.

jimbogt97 · 03-12-2003, 10:06 PM

I know that a 70mm or 75mm will be better than both, But is the '99 throttle body bigger than the '97 throttle body?

THANKS

03-12-2003, 05:18 PM	#1
jimbogt97 Registered Member Join Date: Mar 2002 Location: Grabill, IN Posts: 12	96-98 GT T/B question I have heard that the '96-'98 GT throttle body is really 55mm on the inside even know that it is rated at 65mm. Is this true? Is a stock '99 & up throttle body bigger? I am doing a PI head/cams/intake swap very soon. I was planning on using the stock T/B on my '97 with the PI intake. I can get a '00 stock T/B for almost nothing, Is it worthwhile to use the '00 instead of the '97 T/B? Thanks JIM __________________ 1997 4.6 Mustang GT (automatic) 14.45sec.@94.7mph

03-12-2003, 05:22 PM	#2
explicitone Registered Member Join Date: Apr 2002 Location: racine ,wi Posts: 691	I would get the 99+ tb to go with the swap and the 99+ is a 65mm I dont know about the 96-98 tbs are you getting the heads p&p before you put them on if so I would go with a 70mm __________________ RUN IT STAIGHT AND RUN IT HARD ________ Novi 2000 60' 1.46 1/4 10.67 mph 126.5 _________

03-12-2003, 06:24 PM	#3
elhombre Registered Member Join Date: Oct 2002 Location: San Antonio, TX Posts: 7	i was under the impression that the stock T/B was 63mm on the inside. oh well, i replaced mine with a Ford SVO 75mm and it made a noticable amount of difference. if you are doing a straight swap then the 99 T/B will be fine. if the PI heads are going to be P&P, then you definitely want to go bigger. what about your MAF? just something to think about. good luck. __________________ JV 98GT aka Holly 02 bullitt motor jms performance chip - program 2 steeda tri-ax shifter ford motorsport 9mm spark plug wires accel super coil packs pro-m 75mm maf ford motorsport shorty headers bbk h-pipe w/hi-flow cats - 2.5" flowmaster american thunder cat-back - 2.5" ford motorsport 3.73 rear end ford motorsport 150lph fuel pump kumho ecsta 712 - 255/40-17

03-12-2003, 10:06 PM	#4
jimbogt97 Registered Member Join Date: Mar 2002 Location: Grabill, IN Posts: 12	I know that a 70mm or 75mm will be better than both, But is the '99 throttle body bigger than the '97 throttle body? THANKS __________________ 1997 4.6 Mustang GT (automatic) 14.45sec.@94.7mph

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