Closing deal on a 98 MK4 TT
04-07-16, 07:07 PM
#106
I'd do a few engine mods and keep the stock twin turbos. Things like an intake, downpipe, and bumping the boost up a hair will get you an easy 100 extra hp. Turbocharged cars love E85 ethanol, its great for reducing knock on higher than stock boost levels, but I don't know if I'd want a bunch of that stuff sitting in the gas tank on a car I don't drive a lot.
04-08-16, 06:54 AM
#107
I always tell people , build your car based on its purpose or use. For what he intends to use the car , it won't be worth it to go E85 . He would have to change a lot of stuff especially on the fuel system (injectors , fuel lines , more fuel pump) . E85 requires 30 - 40 % more volume of fuel aside from the fact that those stock twins will start getting choked from the huge amount of exhaust gas produced by E85. Won't benefit much. Then as Aron9000 said , you don't want an E85 car to be sitting for a long period of time because of humidity . Acquiring water into the fuel system corrodes many of the parts of the system. So your fuel system parts has to be E85 friendly .
Stock TT fuel system can get you into the 500rwhp on pump 93. So sticking to it considering the purpose of the car is the best way to go IMHO. You will get into the limits of the stock turbos before you can maximize your current stock fuel system on pump 93. Let your engine breath , install a good intake filter / pipe , exhaust system - 3" down mid pipe and less restrictive cat and mufflers if you still need cat because of emission inspection otherwise take out the cat ,maybe FMIC which is easy to install and taken out if you want the stock sidemount IC back, BCC (greddy- so you can boost higher than the stock 11psi) ... should take you somewhere to 360-420rwhp already. I will push the twins only to around 17-18 psi otherwise , they will be on borrowed times. If you want to go higher , upgrade to hybrid twins or go small single to get you to 500rwhp. Those are the subtle changes you can do to the car (BPU / APU as they term it) without spending tons and still have stock drivability if all the components are properly installed . NEVER CHEAP OUT specially on moving parts is all I can say. Only let people who know what they are doing to work on your car. Many will say they do but I have seen a lot of people or shops who pretend to know but never really know what they are doing with a 2jzgte power plant especially with built engines.
I have seen that 
. There is nothing wrong in saying one's view . The problem lies when it is so obvious that one is wrong, is corrected and gets butt hurt then start whining or being a smartas? ... they will put you in your place quick on that forum . Some won't hold back in what they say . When you are wrong , you are wrong and be man enough to accept it . Only sissies cry when corrected and let their pride prevent them from accepting correction. Don't get me wrong though. It is a nice and great forum. A lot of good people and you will learn a lot about your car. It is the best forum for our MKIVs and about the 2jzgte power plant ... as?holes and idiots are not tolerated there though 
.
Stock TT fuel system can get you into the 500rwhp on pump 93. So sticking to it considering the purpose of the car is the best way to go IMHO. You will get into the limits of the stock turbos before you can maximize your current stock fuel system on pump 93. Let your engine breath , install a good intake filter / pipe , exhaust system - 3" down mid pipe and less restrictive cat and mufflers if you still need cat because of emission inspection otherwise take out the cat ,maybe FMIC which is easy to install and taken out if you want the stock sidemount IC back, BCC (greddy- so you can boost higher than the stock 11psi) ... should take you somewhere to 360-420rwhp already. I will push the twins only to around 17-18 psi otherwise , they will be on borrowed times. If you want to go higher , upgrade to hybrid twins or go small single to get you to 500rwhp. Those are the subtle changes you can do to the car (BPU / APU as they term it) without spending tons and still have stock drivability if all the components are properly installed . NEVER CHEAP OUT specially on moving parts is all I can say. Only let people who know what they are doing to work on your car. Many will say they do but I have seen a lot of people or shops who pretend to know but never really know what they are doing with a 2jzgte power plant especially with built engines.
. There is nothing wrong in saying one's view . The problem lies when it is so obvious that one is wrong, is corrected and gets butt hurt then start whining or being a smartas? ... they will put you in your place quick on that forum . Some won't hold back in what they say . When you are wrong , you are wrong and be man enough to accept it . Only sissies cry when corrected and let their pride prevent them from accepting correction. Don't get me wrong though. It is a nice and great forum. A lot of good people and you will learn a lot about your car. It is the best forum for our MKIVs and about the 2jzgte power plant ... as?holes and idiots are not tolerated there though .
Last edited by gerrb; 04-09-16 at 07:12 AM.
04-09-16, 01:54 AM
#108
^^ I think the SFS STU Hybrid twin upgrade would be a change much more in line with keeping the car close to original. There are also (other than another stock one) the Chris Wilson (UK) and the Garage Whifbitz SMIC's if the factory intercooler ever wears out and you also wish to avoid a front mount. Though they are often associated with E85 fuel systems those hybrid twins can make very modest improvements using only 93 or even 91 octane (up to about 50whp by themselves without other changes so I understand).
That said, as Gerrb has pointed out you don't really need a turbo upgrade if you aren't changing much anyway. And from what Jared at SFS explained to me, stock USDM twins left at factory stock boost levels have been observed to last between 150,000-200,000 miles before rebuilding for some owners. I assume it totally depends on how they were driven on and cared for. Even 14-15psi is supposed to allow them to last for years and years with good care. Not that I'm assuming one of your goals is to put that many miles on your MKIV
FSUsucks1, you've got a beautiful rare (and apparently very low production variant) sportscar in the rarest production year. It doesn't sound like you're out to do more than enjoy it for what it is and take care of it. It's already a very potent classic car as is. It's only going to become more valuable with time
That said, as Gerrb has pointed out you don't really need a turbo upgrade if you aren't changing much anyway. And from what Jared at SFS explained to me, stock USDM twins left at factory stock boost levels have been observed to last between 150,000-200,000 miles before rebuilding for some owners. I assume it totally depends on how they were driven on and cared for. Even 14-15psi is supposed to allow them to last for years and years with good care. Not that I'm assuming one of your goals is to put that many miles on your MKIV
FSUsucks1, you've got a beautiful rare (and apparently very low production variant) sportscar in the rarest production year. It doesn't sound like you're out to do more than enjoy it for what it is and take care of it. It's already a very potent classic car as is. It's only going to become more valuable with time
Last edited by KahnBB6; 04-09-16 at 02:00 AM.
04-09-16, 09:24 AM
#109
^^ I think the SFS STU Hybrid twin upgrade would be a change much more in line with keeping the car close to original. There are also (other than another stock one) the Chris Wilson (UK) and the Garage Whifbitz SMIC's if the factory intercooler ever wears out and you also wish to avoid a front mount. Though they are often associated with E85 fuel systems those hybrid twins can make very modest improvements using only 93 or even 91 octane (up to about 50whp by themselves without other changes so I understand).
That said, as Gerrb has pointed out you don't really need a turbo upgrade if you aren't changing much anyway. And from what Jared at SFS explained to me, stock USDM twins left at factory stock boost levels have been observed to last between 150,000-200,000 miles before rebuilding for some owners. I assume it totally depends on how they were driven on and cared for. Even 14-15psi is supposed to allow them to last for years and years with good care. Not that I'm assuming one of your goals is to put that many miles on your MKIV
FSUsucks1, you've got a beautiful rare (and apparently very low production variant) sportscar in the rarest production year. It doesn't sound like you're out to do more than enjoy it for what it is and take care of it. It's already a very potent classic car as is. It's only going to become more valuable with time
That said, as Gerrb has pointed out you don't really need a turbo upgrade if you aren't changing much anyway. And from what Jared at SFS explained to me, stock USDM twins left at factory stock boost levels have been observed to last between 150,000-200,000 miles before rebuilding for some owners. I assume it totally depends on how they were driven on and cared for. Even 14-15psi is supposed to allow them to last for years and years with good care. Not that I'm assuming one of your goals is to put that many miles on your MKIV
FSUsucks1, you've got a beautiful rare (and apparently very low production variant) sportscar in the rarest production year. It doesn't sound like you're out to do more than enjoy it for what it is and take care of it. It's already a very potent classic car as is. It's only going to become more valuable with time
04-09-16, 04:39 PM
#110
The JDM 2JZGTE twins with ceramic compressor wheels weren't designed to last nearly as long as the export versions but they did promote slightly better spool-up at the lower stock boost setting. Not very useful once you exceed that.
The USDM set I have with 150,000 miles on them were supposed to be still working and not smoking when I bought them with the entire system. They were run at 18psi for a few years. There is some very minor shaft play so I will not be installing them until they are rebuilt but for a set of water-cooled 90's turbochargers that's pretty durable. I am likely going to keep mine at BPU 15 psi when all said and done so I have high hopes for them post-rebuild.
The interesting thing is that while the USDM twins are the ones everyone wants in stock form or STU upgraded form... the JDM twins have thicker and stronger turbine shafts and are supposed to be closer in spec to Garret's GT28 shaft and wheel design from the factory. There are standard steel wheel GT28 rebuilds available for them now and also a version of the STU upgrade as well.
04-10-16, 08:16 AM
#111
For my year 1998, there were only 26 Super White Turbo Auto Targa's sold here. I would not say it is a common car at all.
Attachment 383601
Attachment 383601
I wish I can find more original 6 speed TT Hardtop though. They are the hardest to find ... having only 260 . After 1995 they have stopped producing them and their prices had risen to the roof .
Last edited by gerrb; 04-10-16 at 09:04 AM.
04-10-16, 12:19 PM
#112
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That last year of MKIVs for the US market is a well coveted production car and you have it... congrats.
I wish I can find more original 6 speed TT Hardtop though. They are the hardest to find ... having only 260 . After 1995 they have stopped producing them and their prices had risen to the roof .
I wish I can find more original 6 speed TT Hardtop though. They are the hardest to find ... having only 260 . After 1995 they have stopped producing them and their prices had risen to the roof .
04-10-16, 03:31 PM
#113
That last year of MKIVs for the US market is a well coveted production car and you have it... congrats.
I wish I can find more original 6 speed TT Hardtop though. They are the hardest to find ... having only 260 . After 1995 they have stopped producing them and their prices had risen to the roof .
I wish I can find more original 6 speed TT Hardtop though. They are the hardest to find ... having only 260 . After 1995 they have stopped producing them and their prices had risen to the roof .
Some guy on FB listed a white 98 Targa NA Auto for $12K it had 100K miles. He deleted ad within 15 mins because of the amount of messages he got, sure it got sold within the hour. People were offering 15K and up. Supra market is insane. Wonder if it will get like the E30 M3, that market is wild.
04-12-16, 08:19 AM
#117
Juan,
I've commented on your purchase on SF already, but again congratulations on the purchase! Didn't realize this was your SC. I'm "Supra Turbo" on SF.
And LOL at some of the comments in this thread...
Last edited by SupraTurbo; 04-12-16 at 10:05 AM.
