89 supra turbo mods

bbullsj · 12-15-2011, 08:16 PM

i have an 89 supra turbo automatic. i blew the head gasket externally so im ripping it down. i was wonder what some easy options for upgrades were? everything is stock on it except for 3 inch stainless exhaust from bottom of manifold and back. ive heard swapping out the cams for n/a ones? does the timing need to be set differently than stock then? twin turbo setup(which would be costlty and prob some custom fab work)? aftermarket exhaust manifold that will still bolt up to the stock ct-26 turbos?
im not looking to get into fuel injectors, pump, and ignition yet. need to get it back driveable first but looking for some easy upgrades while im doing the head gasket.
are valve seals fairly easy to do or do they require some special tools?

it is currently an automatic but im hoping to convert it to a manual soon. i know i should just buy one thats a manual and same myself a lot of time but this car is in such good shape with no rust and ive put a lot of new parts on it in the past 2 years that i dont want to have to do to a new one.
if anyone has some good info or knows any sites or other threads that will help me it would be greatly appreciated. ive seen some other threads discuss upgrades but one always seems to contradict each other on which ones are the best.

cre · 12-16-2011, 05:57 AM

The N/A cam swap is a myth... The exhaust cams are all the same, only the intake cam differs but it doesn't really give much improvement in the low end (because you're out of it's range too quickly once the turbo begins compressing air) and the high end gets significantly choked.

A twin turbo setup is a waste of time and money. A well designed/planned single turbo setup will grant the same performance with less expense and a lot less custom work.

The valve stem seals are quite easy if you've got the head off.... adjust the cam lobe/lifter clearances while you're at it.

Awyman18 · 12-16-2011, 03:52 PM

boost controller ---> 11psi of boost will add alot, downpipe with full 3" exhaust with no cats. idk wat ur emmissions rules are but i live in ohio and thats wat i did...lol, fmic, hard pipes, u could always tear out some of the interior ad crap u dont need to make it lighter, nice cold air intake...and get a nice custom box around it so its not just sucking in hot air and i mean...thats basically it lol. u wold have to get new injectors and fuel pump if u wanted more

12-15-2011, 08:16 PM	#1
bbullsj Intake Join Date: Oct 2008 Location: Michigan Posts: 42	89 supra turbo mods i have an 89 supra turbo automatic. i blew the head gasket externally so im ripping it down. i was wonder what some easy options for upgrades were? everything is stock on it except for 3 inch stainless exhaust from bottom of manifold and back. ive heard swapping out the cams for n/a ones? does the timing need to be set differently than stock then? twin turbo setup(which would be costlty and prob some custom fab work)? aftermarket exhaust manifold that will still bolt up to the stock ct-26 turbos? im not looking to get into fuel injectors, pump, and ignition yet. need to get it back driveable first but looking for some easy upgrades while im doing the head gasket. are valve seals fairly easy to do or do they require some special tools? it is currently an automatic but im hoping to convert it to a manual soon. i know i should just buy one thats a manual and same myself a lot of time but this car is in such good shape with no rust and ive put a lot of new parts on it in the past 2 years that i dont want to have to do to a new one. if anyone has some good info or knows any sites or other threads that will help me it would be greatly appreciated. ive seen some other threads discuss upgrades but one always seems to contradict each other on which ones are the best.

12-16-2011, 05:57 AM	#2
cre Toyota Racing Development Join Date: Apr 2007 Posts: 5,038	The N/A cam swap is a myth... The exhaust cams are all the same, only the intake cam differs but it doesn't really give much improvement in the low end (because you're out of it's range too quickly once the turbo begins compressing air) and the high end gets significantly choked. A twin turbo setup is a waste of time and money. A well designed/planned single turbo setup will grant the same performance with less expense and a lot less custom work. The valve stem seals are quite easy if you've got the head off.... adjust the cam lobe/lifter clearances while you're at it. __________________ 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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12-16-2011, 03:52 PM	#3
Awyman18 3" Exhaust Join Date: Apr 2011 Location: columbus Posts: 151	boost controller ---> 11psi of boost will add alot, downpipe with full 3" exhaust with no cats. idk wat ur emmissions rules are but i live in ohio and thats wat i did...lol, fmic, hard pipes, u could always tear out some of the interior ad crap u dont need to make it lighter, nice cold air intake...and get a nice custom box around it so its not just sucking in hot air and i mean...thats basically it lol. u wold have to get new injectors and fuel pump if u wanted more