difference in throttlebodies??????need help

88stalker5.0 · 03-27-2002, 07:22 PM

ok i have a 1988 mustang GT 5.0 and i just bought a 93 5.0 motor..it looks like the throttle bodies bore is bigger..because i dont have the resources to put in the motor yet..and i was wanting to put the 93 throttle body in the 88.. is the bore bigger then the 88 throttle body?? please help
Dave

Mr 5 0 · 03-27-2002, 08:08 PM

If the intakes and the TBs' are stock - not aftermarket - the TB should be 60mm on both the '88 and '93 throttle-body and interchangable.

If you see a noticable difference between the two TB's, the larger one may be a 65mm aftermarket unit.

sn95gt19 · 03-28-2002, 04:57 PM

i am not totally positive on this but there could be a slight difference between the two throttle bodies because the 88yr was speed density, and in 89-93 they went to the mass air system, but they still are interchangable.

DRASTiK · 03-29-2002, 02:51 AM

the stock TB's on the SD and mass air fox body cars are identical.

2FastLX · 03-29-2002, 07:56 AM

If it's that noticable of a difference maybe it's a 65mm. Did the engine come out of a Cobra? If so it would have a 65mm on it if I'm not mistaken. Or maybe someone just slapped a 65mm on there. Anyway, see if you can get a measurement of the bore and find out.

03-27-2002, 07:22 PM	#1
88stalker5.0 Registered Member Join Date: Mar 2002 Posts: 1	difference in throttlebodies??????need help ok i have a 1988 mustang GT 5.0 and i just bought a 93 5.0 motor..it looks like the throttle bodies bore is bigger..because i dont have the resources to put in the motor yet..and i was wanting to put the 93 throttle body in the 88.. is the bore bigger then the 88 throttle body?? please help Dave

03-27-2002, 08:08 PM	#2
Mr 5 0 Conservative Individualist Join Date: May 1997 Location: Wherever I need to be Posts: 7,487	TB size If the intakes and the TBs' are stock - not aftermarket - the TB should be 60mm on both the '88 and '93 throttle-body and interchangable. If you see a noticable difference between the two TB's, the larger one may be a 65mm aftermarket unit.

03-29-2002, 02:51 AM	#4
DRASTiK Registered Member Join Date: May 2001 Location: Yuma, AZ Posts: 536	the stock TB's on the SD and mass air fox body cars are identical. __________________ Dave 88 GT - 13.4@106 on street tires (2.2 60ft) My Stang RHC member #75 My stang is FOR SALE!!

03-29-2002, 07:56 AM	#5
2FastLX The Photoshop Guru Join Date: Feb 2001 Location: Mecca, Indiana Posts: 1,419	If it's that noticable of a difference maybe it's a 65mm. Did the engine come out of a Cobra? If so it would have a 65mm on it if I'm not mistaken. Or maybe someone just slapped a 65mm on there. Anyway, see if you can get a measurement of the bore and find out. __________________ Project: 1988 Coupe - EFI 5.8L Twin Turbo with Victor intake, Canfield heads, F303 cam, March aluminum underdrive pulleys, TKO (or T56 if funds permit), PBR twin piston calipers and 13" rotors up front, 94 Cobra rear calipers and 12" rotors on the rear, 3.73's, Griggs K-member, tubular front control arms, torque arm and panhard bar, polished 99 Cobra wheels. "The GR-40 kit installation is now complete, and the humble Fox-chassis car will now out-corner and out-stop a ZR-1 or a Viper, and support massive horsepower additions with perfect balance." Griggs Racing ICQ# 42269241

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03-28-2002, 04:57 PM	#3
sn95gt19 motors done......woohooo Join Date: Mar 2002 Posts: 799	i am not totally positive on this but there could be a slight difference between the two throttle bodies because the 88yr was speed density, and in 89-93 they went to the mass air system, but they still are interchangable.