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> MR2 or JDM GT4???, both have a 3sgte...
post Jan 23, 2004 - 12:25 AM
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pbgcelica

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Aight, I have been reading a little, but between college and work, I haven't had enough time to read everything, so I don't know if this is a repost... BUT I was wondering if a 3sgte from a USDM mr2 (if a 3sgte motor available in it) is the same thing as a 3sgte from a JDM celica gt4... my thinking is that a 3sgte is a 3sgte is a 3sgte, but with the mr2 being a mid-engine it could change the engine around. OH and I am talking about a 3 gen. 3sgte from a 94 on gt4...

Thanks for the help
 
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post Jan 23, 2004 - 12:04 PM
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boosted_K2



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this is directly pulled off the newbie forum on the MR2 owners club messageboard. these are the differences between the USDM gen2 MR2 motor, and the gen3 MR2 motor. THIS HAS NOTHING TO DO WITH ANY GT-4 MOTORS.

QUOTE

FYI: Gen III Differences
- MAP sensor instead of AFM
- Bosch D-Jetronic (Gen III) vs. L-Jetronic (relatively primitive) engine management
- CT20b turbo replaces CT26
- Boost raised from 10psi to 13psi
- Fuel cut raised from 12 psi to 18 psi
- Different ECU
- 4 wire O2 sensor
- Shim under bucket valve shims
- slightly more aggressive cams
- Revised internals (pistons, con-rods etc.)
- Revised cylinder head cooling passages/water jackets
- Revised intake manifold (8 'independent long ports' reduced to 4)
- intake manifold inlet air temperature sensor added. i.e. after turbo and intercooler.
- Revised gearbox with close ratio gearing
- lower compression ratio
- stainless steel head gasket
- factory 540cc injectors replace 430cc injectors
- revised fuel rail with bigger bore and relocated pressure regulator
- TVIS eliminated
- EGR eliminated
- LSD in 80% of them
- throttle body increased from 55mm to 60mm
- inlet valve lift increased from 8.2 to 8.7
- intake manifold inlet air temperature sensor added
- Less restrictive exhaust elbow
- Aluminum oil pan
- more rigid alloy sump and additional oil baffles
- Factory Catch can
- Better Oil Cooler and relocated oil filter (bottom)
- 4 Channel ABS coupled with Traction Control available
- No. 1 compression ring described as 'stainless steel' instead of just 'steel'. Oil ring is described as 'stainless steel' instead of 'a combination of steel and stainless steel'.


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Posts in this topic
- pbgcelica   MR2 or JDM GT4???   Jan 23, 2004 - 12:25 AM
- - OOBE   You answered your own questions! But the 3rd ...   Jan 23, 2004 - 12:48 AM
- - snadman   He's right. It basically all depends on the po...   Jan 23, 2004 - 12:56 AM
- - kuya1284   For starters... there were no USDM MR2's that ...   Jan 23, 2004 - 4:40 AM
- - BigEdge169   also, swaps have been made from both cars, so they...   Jan 23, 2004 - 10:15 AM
- - boosted_K2   both motors will work, however there are differenc...   Jan 23, 2004 - 11:57 AM
- - boosted_K2   this is directly pulled off the newbie forum on th...   Jan 23, 2004 - 12:04 PM
- - BigEdge169   you'll also find that it will be much easier t...   Jan 23, 2004 - 12:45 PM
- - kuya1284   Please keep in mind that it won't necessarily ...   Jan 23, 2004 - 12:53 PM
- - jayi12-15psi   ummm, ct20b, ahhh <---- drool   Jan 23, 2004 - 4:22 PM
- - boosted_K2   id personally rather get a TD-06 kit than a CT-20b...   Jan 23, 2004 - 4:34 PM
- - Supersprynt   I didnt know stock boost on an MR2T was 10psi, its...   Jan 23, 2004 - 4:42 PM
- - boosted_K2   stock MR2 ranges from 8.6-10.0 PSI under normal co...   Jan 23, 2004 - 4:48 PM
- - jgreening   QUOTE (kuya1284 @ Jan 23, 2004 - 5:53 PM) Please k...   Jan 25, 2004 - 3:26 AM
- - Supersprynt   keep inmind that the US had the 2nd Gen Alltrac, s...   Jan 25, 2004 - 3:33 AM
- - kuya1284   QUOTE (jgreening @ Jan 25, 2004 - 1:26 AM) QUOTE (...   Jan 25, 2004 - 4:57 AM
- - Doge   If you get a 2ng gen, ALL parts will be available ...   Jan 25, 2004 - 4:01 PM
- - XXX_Mina   i have mr2 engine and tranny in my baby.... look a...   Jan 27, 2004 - 12:38 AM
- - boosted_K2   ... whatd you have your FCD set at?? rule of thumb...   Jan 27, 2004 - 1:06 AM
- - kuya1284   QUOTE (boosted_K2 @ Jan 26, 2004 - 11:06 PM) ...   Jan 27, 2004 - 2:44 AM
- - boosted_K2   ohhh he was running WI?? i didnt know that... was ...   Jan 27, 2004 - 12:01 PM

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