turbo kits
11-02-2021, 02:29 PM
#1
Burning Brakes
Thread Starter
turbo kits
I know there is plenty of criticism about putting turbo on these cars but humor me.. I'm just looking into it.
does anyone other then TPC do turbo kit in USA
just asking.
does anyone other then TPC do turbo kit in USA
just asking.
11-02-2021, 06:37 PM
#2
Three Wheelin'
My son just bought a Cayman Turbo. It has been built very well. Uses a Garret GT3582R with a 50mm waste gate. Also has meth injection. At the moment we are getting the turbo rebuilt, adding a BOV and a few other things. On a good day, around 400Hp atw on 5.5psi. Car has run the turbo for around 20,000kms. Just had a compression and leak down, and all good. If everyone believed what was said on the internet, we'd all throw our m96 / M97's away.
11-02-2021, 06:53 PM
#3
Burning Brakes
Thread Starter
My son just bought a Cayman Turbo. It has been built very well. Uses a Garret GT3582R with a 50mm waste gate. Also has meth injection. At the moment we are getting the turbo rebuilt, adding a BOV and a few other things. On a good day, around 400Hp atw on 5.5psi. Car has run the turbo for around 20,000kms. Just had a compression and leak down, and all good. If everyone believed what was said on the internet, we'd all throw our m96 / M97's away.
i’m thinking about purchasing the TPC turbo set up but was curious if there was any other options that I’m maybe not finding I would love to do twins instead of a single.
11-02-2021, 10:34 PM
#4
Instructor
i have a couple friends with them as well and none of them have the horror stories I read about online. I understand some of them do grenade but I think those are the exceptions and they get most of the attention.
i’m thinking about purchasing the TPC turbo set up but was curious if there was any other options that I’m maybe not finding I would love to do twins instead of a single.
i’m thinking about purchasing the TPC turbo set up but was curious if there was any other options that I’m maybe not finding I would love to do twins instead of a single.
I do recall seeing a TT street car at the California Festival of speed a couple of years ago that some company was providing. Can't recall the name though.
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ttt123 (11-03-2021)
11-03-2021, 07:52 AM
#5
Burning Brakes
Thread Starter
There's no advantage to doing twins at such a low boost pressure. I had a TPC setup on my 07 S and it worked very well on the street, not so well on the track. Then a built 4.0L with a larger single Garrett that made around 550 at the wheels. Next step was twin turbos but track only ~700 HP. Car now has a 3.8 996 era Mezger making 836 HP at the wheels.
I do recall seeing a TT street car at the California Festival of speed a couple of years ago that some company was providing. Can't recall the name though.
I do recall seeing a TT street car at the California Festival of speed a couple of years ago that some company was providing. Can't recall the name though.
Thanks for sharing.
11-03-2021, 10:07 AM
#6
Rennlist Member
OK, I'll try and not be discouraging but:
Generally speaking, all engines designed from scratch to run with a turbo use a lower compression ratio, achieved by changing the piston design or combustion chamber design. Both are expensive to do in the aftermarket. It is also best to go with a standalone engine management system, another costly item.
Turbos are generally heat limited. When you hear that an engine gernaded, what usually happened was the tops of the pistons melted. Heat can be managed in several ways but one key way to is to only employ the full boost of the turbo in short bursts. This is perfect for drag racing, not so much for track or street use.
Surprisingly, the force on the connecting rods of most turbo applicatons is not the critical design parameter. The centrifugal force of the piston passing through top dead center remains the limiting design condition.
You can have a lot of fun with this. Just keep in mind that replacement engines are hard to come by, as many have been snatched up from those recovering from IMS issues and/or bore scoring. Or aftermarket turbo mods!
Generally speaking, all engines designed from scratch to run with a turbo use a lower compression ratio, achieved by changing the piston design or combustion chamber design. Both are expensive to do in the aftermarket. It is also best to go with a standalone engine management system, another costly item.
Turbos are generally heat limited. When you hear that an engine gernaded, what usually happened was the tops of the pistons melted. Heat can be managed in several ways but one key way to is to only employ the full boost of the turbo in short bursts. This is perfect for drag racing, not so much for track or street use.
Surprisingly, the force on the connecting rods of most turbo applicatons is not the critical design parameter. The centrifugal force of the piston passing through top dead center remains the limiting design condition.
You can have a lot of fun with this. Just keep in mind that replacement engines are hard to come by, as many have been snatched up from those recovering from IMS issues and/or bore scoring. Or aftermarket turbo mods!
Last edited by harveyf; 11-03-2021 at 10:11 AM.
11-03-2021, 11:43 AM
#7
Instructor
BTW my car with a single turbo was featured in Excellence magazine Dec 2013
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ttt123 (11-03-2021)
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11-03-2021, 11:48 AM
#8
Burning Brakes
Thread Starter
OK, I'll try and not be discouraging but:
Generally speaking, all engines designed from scratch to run with a turbo use a lower compression ratio, achieved by changing the piston design or combustion chamber design. Both are expensive to do in the aftermarket. It is also best to go with a standalone engine management system, another costly item.
Turbos are generally heat limited. When you hear that an engine gernaded, what usually happened was the tops of the pistons melted. Heat can be managed in several ways but one key way to is to only employ the full boost of the turbo in short bursts. This is perfect for drag racing, not so much for track or street use.
Surprisingly, the force on the connecting rods of most turbo applicatons is not the critical design parameter. The centrifugal force of the piston passing through top dead center remains the limiting design condition.
You can have a lot of fun with this. Just keep in mind that replacement engines are hard to come by, as many have been snatched up from those recovering from IMS issues and/or bore scoring. Or aftermarket turbo mods!
Generally speaking, all engines designed from scratch to run with a turbo use a lower compression ratio, achieved by changing the piston design or combustion chamber design. Both are expensive to do in the aftermarket. It is also best to go with a standalone engine management system, another costly item.
Turbos are generally heat limited. When you hear that an engine gernaded, what usually happened was the tops of the pistons melted. Heat can be managed in several ways but one key way to is to only employ the full boost of the turbo in short bursts. This is perfect for drag racing, not so much for track or street use.
Surprisingly, the force on the connecting rods of most turbo applicatons is not the critical design parameter. The centrifugal force of the piston passing through top dead center remains the limiting design condition.
You can have a lot of fun with this. Just keep in mind that replacement engines are hard to come by, as many have been snatched up from those recovering from IMS issues and/or bore scoring. Or aftermarket turbo mods!
thanks for the awesome post
11-03-2021, 12:03 PM
#9
Burning Brakes
Thread Starter
There are several companies that can build you a 3.8 or 4.0L 987 era engine. Vision Motorsports in Laguna Hills CA built mine. If I had to do it over again I would have done a NA 4.0L for a street car. When I decided to go to the Mezger Vision provided the new core engine and took the 4.0L in trade. It is a 9.5:1 turbo build with low mileage. Give them a call .
BTW my car with a single turbo was featured in Excellence magazine Dec 2013
BTW my car with a single turbo was featured in Excellence magazine Dec 2013
11-03-2021, 02:55 PM
#10
There are several companies that can build you a 3.8 or 4.0L 987 era engine. Vision Motorsports in Laguna Hills CA built mine. If I had to do it over again I would have done a NA 4.0L for a street car. When I decided to go to the Mezger Vision provided the new core engine and took the 4.0L in trade. It is a 9.5:1 turbo build with low mileage. Give them a call .
BTW my car with a single turbo was featured in Excellence magazine Dec 2013
BTW my car with a single turbo was featured in Excellence magazine Dec 2013
11-04-2021, 01:02 PM
#15
Not worth it. For 25k or less you can install 3.8l NA with similar power and sell the existing engine, or bore out and build the current engine or maybe even build 4.0l based on 3.8 and sell the current one.