Boost problem. '88 turbo

Cyto · 08-24-2009, 09:29 PM

I just recently repaired a blown head gasket in my 1988 Supra Turbo, and everything went fine..until I noticed that it wouldn't rev up..so I checked the catalytic converter and it was melted..water got into it and just screwed everything up..so I gutted it. It's straight pipe now..and now my turbo wants to over boost and kick. It jumps past +8 and just cuts off, and then starts back at +4..and does it again..I can't get passed 100 due to the fact that I can't press the gas hard enough without the boost jumping up.

Is there a way I can tweek the turbo so that it doesnt do that?

Also..it starts to overheat when it does this..

btwilson86 · 08-25-2009, 12:32 AM

You're probably overheating cuz you're running lean...

Don't know how to stop the turbo from doing that, but you could take advantage of the fact that it is and just get the lexus MAF and 550cc injectors. Then it shouldn't cut out and you should stay in normal operating temp.

Cyto · 08-25-2009, 01:40 AM

That would cost so much though...I'm in school now, can't even afford books..lol

08-24-2009, 09:29 PM	#1
Cyto 3" Exhaust Join Date: Jul 2009 Location: USA Posts: 103	Boost problem. '88 turbo I just recently repaired a blown head gasket in my 1988 Supra Turbo, and everything went fine..until I noticed that it wouldn't rev up..so I checked the catalytic converter and it was melted..water got into it and just screwed everything up..so I gutted it. It's straight pipe now..and now my turbo wants to over boost and kick. It jumps past +8 and just cuts off, and then starts back at +4..and does it again..I can't get passed 100 due to the fact that I can't press the gas hard enough without the boost jumping up. Is there a way I can tweek the turbo so that it doesnt do that? Also..it starts to overheat when it does this.. __________________ Proud owner of a 1988 Toyota Supra Turbo, 105k Miles, and great condition. I might have to sell it to help pay for school so here's the link. http://www.toyota-supra.info/forums/...html#post72357

08-25-2009, 12:32 AM	#2
btwilson86 Super Moderator Join Date: May 2007 Location: Billings, Montana Posts: 1,034	You're probably overheating cuz you're running lean... Don't know how to stop the turbo from doing that, but you could take advantage of the fact that it is and just get the lexus MAF and 550cc injectors. Then it shouldn't cut out and you should stay in normal operating temp. __________________ 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

08-25-2009, 01:40 AM	#3
Cyto 3" Exhaust Join Date: Jul 2009 Location: USA Posts: 103	That would cost so much though...I'm in school now, can't even afford books..lol __________________ Proud owner of a 1988 Toyota Supra Turbo, 105k Miles, and great condition. I might have to sell it to help pay for school so here's the link. http://www.toyota-supra.info/forums/...html#post72357

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