Differences between 7M-GE and 7M-GTE

cre · 03-13-2012, 11:35 PM

I have no idea why, but it seems vBulletin (the forum's software) doesn't like large HTML tables.... so you'll need to scroll down a ways to get to the table. Just keep scrolling... I promise it's there.

Traits & Components	7M-GE	7M-GTE
Induction	Naturally Aspirated	Turbocharged(stock 6-8psi)
Unique Components	ACIS - Acoustic Control Induction System	Check valve between surge tank and ISCV.
Air Flow Meter	VAFM - Vane Air Flow Meter (deflection meter system)	KVAFM - Karmann Vortex Air Flow Meter (optical meter system)
EFI Naturally both systems use different engine, engine bay, dash wiring harnesses and EMS.	One knock sensor between cyls 3 & 4	Two knock sensors: First between cyls 1 & 2; Second between cyls 5 & 6
Ignition	Single ignition coil w/ distributor	Multi-channel igniter, multi-coil (wasted spark*)
	CPS located in distributor	CPS without distributor.
Gauge cluster differences	Battery gauge, different tach circuit	Boost gauge, no batter, different tach circuit
Lubrication System	Lower volume oil pump same pressure as GTE pump.	High volume oil pump same pressure as GE pump.
	No oil cooling components.	Oil cooler (bypass, pressure regulated)
Additional Cooling Features		Oil squirters to cool pistons
		One additional 10" or 12" aux fan between the A/C condensor and the radiator.
		Turbo cooling circuits (oil and water)
Piston dish volume (this accounts solely for the difference in compression between the two engines)	9.5cc	19cc
Cylinder volume	40cc	40cc
OEM head gasket thickness	1.37mm	1.37mm
Compression	9.1:1 (My calculations show this should be a bit higher. Around 9.3.)	8.387:1
Cylinder bore	83mm	83mm
Stroke	91mm	91mm
Minimum Recommended Octane (AKI = R+M/2)	87 AKI or better (91 RON, 95 RON recommended)	91 AKI or better (97 RON)
Transmission	W58 (push type pressure plate), A340E	R154 (pull type pressure plate), A340E
End Gear	4.30:1	3.91 ('87-'88), 3.73 ('89-'93)
Fuel Pump	Intermediate flow	High flow
Fuel injectors	'86.5-'88 Low impedance: 260-320cc/m '89-'93 High impedance: 276-340cc/m (NOT interchangable**! Let the rumor of the later model injectors flowing over 20% more die already!)	'87-'93 Low Impedance: 404-456cc/m

*The GTE ignition setup uses three channels to control spark across all six cylinders. This is accomplished by what is known as "wasted spark". When the igniter is signalled to fire channel #1, for example, it actually sends a spark to cylinder #1 AND cylinder #6. While one cylinder is on its combustion the other is on its exhaust stroke... thus one spark is "wasted". The pairings are: 1 & 6; 3 & 4; @ & 5

**The '89 and later MKIII injectors may be used in earlier models by bypassing the injector pack on the driver's side fender. These injectors are most easily spotted by their green tops where earlier model injectors had yellow tops. The yellow top injectors can NOT be made to function in '89 and newer vehicles.

cre · 03-14-2012, 02:18 AM

Well, I'm tired of working on trying to beat this table into submission so I'm calling it a night. I'll go back over the information later to make sure it's all kosher. If there's something else that you think is important to list then please let me know.

btwilson86 · 03-19-2012, 06:47 PM

Sweet table Cre, lots of good info here. I did notice one thing that I believe should be changed; the auto transmissions you have listed as A134E's, but aren't they A340E's?

cre · 03-21-2012, 07:23 AM

Quote:

Originally Posted by btwilson86

Sweet table Cre, lots of good info here. I did notice one thing that I believe should be changed; the auto transmissions you have listed as A134E's, but aren't they A340E's?

Corrected, thanks!

CanadianBak'inSupra · 04-12-2012, 06:29 PM

nice work

Roger UK · 04-07-2014, 12:37 PM

Just seen this table . . . very useful

Just one thing, I don't know about other markets, but here in the UK the 7M-GE DOES have an Oil Cooler, the same as on the 7M-GTE cars.

03-14-2012, 02:18 AM	#2
cre Toyota Racing Development Join Date: Apr 2007 Posts: 5,038	Well, I'm tired of working on trying to beat this table into submission so I'm calling it a night. I'll go back over the information later to make sure it's all kosher. If there's something else that you think is important to list then please let me know. __________________ If something breaks or you need to contact a member of the administration please post HERE. Unless it's a private or administration matter please post it on the forum. It benefits no one else if car related questions aren't posted for future users and takes away from the time I'm able to spend helping on the rest of the forum. If you're so inclined I'm always more than happy to accept tips via PayPal. Tip Jar --->

03-19-2012, 06:47 PM	#3
btwilson86 Super Moderator Join Date: May 2007 Location: Billings, Montana Posts: 1,034	Sweet table Cre, lots of good info here. I did notice one thing that I believe should be changed; the auto transmissions you have listed as A134E's, but aren't they A340E's? __________________ 1989 7MGTE R154 Targa Top White Package w/Blue Interior Driftmotion 57trim CT26, Upgraded Intercooler, 2.25" Hard Pipes, 3" Turbo Back Exhaust with Test Pipe, HKS VPC w/GM 3 bar MAP sensor, APEXi S-AFC, Walbro 255lph fuel pump, ProSport EVO Series Boost / Fuel Pressure / AFR gauges, Lotek a Pillar Gauge Pod, HKS Type 0 Turbo Timer, Eibach Lowering Springs, Tokico Illumina II TEMS struts, custom powder coated Motegi Racing TrakLite wheels

04-12-2012, 06:29 PM	#5
CanadianBak'inSupra Official hall monitor / search nazi - NO SOUP FOR YOU! Join Date: Oct 2009 Location: Canada, BC Posts: 837	nice work __________________ 1984 supra - 1uzfe - w58 - 4.10 - 1 piece aluminum shaft.

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04-07-2014, 12:37 PM	#6
Roger UK Stock Join Date: Oct 2005 Location: Newcastle, England Posts: 7	Just seen this table . . . very useful Just one thing, I don't know about other markets, but here in the UK the 7M-GE DOES have an Oil Cooler, the same as on the 7M-GTE cars. __________________ 1991 3.0i (N/A) Manual, Black Mica. Owned 6 yrs, Mint Bodywork, Daily Driver. Recent Engine Recon (rebored, crank ground, new oil & water pumps etc), New Rad & Catless Exhaust, EGR all removed, Inline PCV Filter (Photos at http://wessexproductions.co.uk/supra )