Converting car to turbo setup...
Thread Starter
Joined: May 2005
Posts: 795
Likes: 2
From: Midlothian, Virginia
Converting car to turbo setup... I want to start off by thanking everyone for their input. I am not new to cars in anyway or even turbos for that matter but I do understand the value in someone who is speaking from experience.
The car is a 1987 Porsche 944 Turbo (951) manual transmission and lightweight. Motor is a 355 LT1 with a CC306 (230/244 .510/544 112 lsa on 1.5rr), comp cams pro magnum 1.6RR, comp push rods and Morel lifters. Heads have been ported and polished by a local machinist. GM dual plane intake with a Holley 4779 750 cfm DP with mechanical sec. Balanced bottom end. The sad part is I am clueless on what pistons are in the car and what the compression ratio is ( I know that will complicate things ) I know the crank and the rods and stock but have been balanced. Car runs great but I am used to the power already.
I have a twin turbo system planned out which consist of 2 - gt35 t4 .68 AR turbos. twin turbosmart 38mm wastegates, and a procharger red race valve and a front mount intercooler. Wastegates will have a 7 psi spring and plan to use a turbosmart boost controller to increase from there. Carb will be modified or replaced with a blow through carb.
My first question actually is about changing the camshaft. I am looking for a good turbo cam that will fit my application but also maybe benefit me better if I choose to switch to a better head. The AFR 195cc have been on my list for some time. Again thanks for your help and please let me know if I am overlooking something.
The car is a 1987 Porsche 944 Turbo (951) manual transmission and lightweight. Motor is a 355 LT1 with a CC306 (230/244 .510/544 112 lsa on 1.5rr), comp cams pro magnum 1.6RR, comp push rods and Morel lifters. Heads have been ported and polished by a local machinist. GM dual plane intake with a Holley 4779 750 cfm DP with mechanical sec. Balanced bottom end. The sad part is I am clueless on what pistons are in the car and what the compression ratio is ( I know that will complicate things ) I know the crank and the rods and stock but have been balanced. Car runs great but I am used to the power already.
I have a twin turbo system planned out which consist of 2 - gt35 t4 .68 AR turbos. twin turbosmart 38mm wastegates, and a procharger red race valve and a front mount intercooler. Wastegates will have a 7 psi spring and plan to use a turbosmart boost controller to increase from there. Carb will be modified or replaced with a blow through carb.
My first question actually is about changing the camshaft. I am looking for a good turbo cam that will fit my application but also maybe benefit me better if I choose to switch to a better head. The AFR 195cc have been on my list for some time. Again thanks for your help and please let me know if I am overlooking something.
