ignition question

cre · 09-04-2011, 07:05 PM

I'm having some trouble understanding you. Are you actually asking why they would use a direct ignition system on the 7M-GTE? Direct ignition systems run more efficiently, provide better spark and offer a much greater degree of control to the TCCS... But they're expensive so Toyota only offered them with the higher end model... go figure. Sadly, back when this system was built it wasn't refined enough to make a significant "real world" difference sooooo.... How about we stick with the "just for the hell of it" reasoning?

Toyota's always screwed around with the various configurations of the Supra. There were significant differences between GE and GTE in the MKIV too. There were MKIII models which used MAP versus VAFM or KVAFM.... The Supra was always both a testbed and showcase for newer technologies.

I wouldn't consider downgrading the ignition though... aside from losing some small degree of performance and the electronic modifications which will be required you're going to have a very bad time getting the dizzy and plug wires to fit; The intake is in the way.

boosted to 26psi · 09-04-2011, 10:55 PM

Quote:

Originally Posted by cre

I'm having some trouble understanding you. Are you actually asking why they would use a direct ignition system on the 7M-GTE? Direct ignition systems run more efficiently, provide better spark and offer a much greater degree of control to the TCCS... But they're expensive so Toyota only offered them with the higher end model... go figure. Sadly, back when this system was built it wasn't refined enough to make a significant "real world" difference sooooo.... How about we stick with the "just for the hell of it" reasoning?

Toyota's always screwed around with the various configurations of the Supra. There were significant differences between GE and GTE in the MKIV too. There were MKIII models which used MAP versus VAFM or KVAFM.... The Supra was always both a testbed and showcase for newer technologies.

I wouldn't consider downgrading the ignition though... aside from losing some small degree of performance and the electronic modifications which will be required you're going to have a very bad time getting the dizzy and plug wires to fit; The intake is in the way.

So where's the best but cheapest place to get a replacement coil....also ia the mass airflow sensor necessary. How to bypass that, what part are interchangeable, how do I tell if I have thw 7m-gte engine harness an ecu.

btwilson86 · 09-05-2011, 12:17 AM

ECU tells you right on it which engine and transmission it's for. I think the easiest way to find out which harness you have is to see how many knock sensor connectors you have on it. 1=GE, 2=GTE.

And the KVAFM is important, don't get rid of it unless you're replacing it with some other air metering device (different AFM, MAF, MAP, etc).

cre · 09-05-2011, 12:57 AM

Oh for the love of all that is considered progress!!! What the hell are you trying to accomplish? Why not just finish neutering the damned thing, ditch the entire EFI setup, toss on a carburetor and get some immigrant children to sit under the hood with flints to take care of the job of those pesky spark plugs?

boosted to 26psi · 09-05-2011, 01:11 AM

Quote:

Originally Posted by cre

Oh for the love of all that is considered progress!!! What the hell are you trying to accomplish? Why not just finish neutering the damned thing, ditch the entire EFI setup, toss on a carburetor and get some immigrant children to sit under the hood with flints to take care of the job of those pesky spark plugs?

If I could get away with that I would try it....lol. basically im finishin what someone else started. But I'm juat goin to get the coils an do it right. So now I need to find one

btwilson86 · 09-05-2011, 02:57 AM

Quote:

Originally Posted by boosted to 26psi

But I'm juat goin to get the coils an do it right. So now I need to find one

Actually, 3. The GTE uses three coil packs

And lol Cre

Where's Green? He should be all over throwing that in his "Funny one line sigs" thread

boosted to 26psi · 09-05-2011, 03:12 AM

Quote:

Originally Posted by btwilson86

Actually, 3. The GTE uses three coil packs

And lol Cre

Where's Green? He should be all over throwing that in his "Funny one line sigs" thread

I know this....i was speakin one as in a set....

09-04-2011, 07:05 PM	#1
cre Toyota Racing Development Join Date: Apr 2007 Posts: 5,038	I'm having some trouble understanding you. Are you actually asking why they would use a direct ignition system on the 7M-GTE? Direct ignition systems run more efficiently, provide better spark and offer a much greater degree of control to the TCCS... But they're expensive so Toyota only offered them with the higher end model... go figure. Sadly, back when this system was built it wasn't refined enough to make a significant "real world" difference sooooo.... How about we stick with the "just for the hell of it" reasoning? Toyota's always screwed around with the various configurations of the Supra. There were significant differences between GE and GTE in the MKIV too. There were MKIII models which used MAP versus VAFM or KVAFM.... The Supra was always both a testbed and showcase for newer technologies. I wouldn't consider downgrading the ignition though... aside from losing some small degree of performance and the electronic modifications which will be required you're going to have a very bad time getting the dizzy and plug wires to fit; The intake is in the way. __________________ 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 --->

09-05-2011, 12:17 AM	#3
btwilson86 Super Moderator Join Date: May 2007 Location: Billings, Montana Posts: 1,034	ECU tells you right on it which engine and transmission it's for. I think the easiest way to find out which harness you have is to see how many knock sensor connectors you have on it. 1=GE, 2=GTE. And the KVAFM is important, don't get rid of it unless you're replacing it with some other air metering device (different AFM, MAF, MAP, etc). __________________ 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

09-05-2011, 12:57 AM	#4
cre Toyota Racing Development Join Date: Apr 2007 Posts: 5,038	Oh for the love of all that is considered progress!!! What the hell are you trying to accomplish? Why not just finish neutering the damned thing, ditch the entire EFI setup, toss on a carburetor and get some immigrant children to sit under the hood with flints to take care of the job of those pesky spark plugs? __________________ 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 --->

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