Single Turbo Setup HELP! for Porsche
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Single Turbo Setup HELP! for Porsche
Hey guys!
Its been awhile since ive sold my Single turbo FD
And ive moved to the 1st gen porsche cayman. The way the car feels in the cockpit actually feels close to the FD i think. It took me very little time to adjust to it.
Anyways, ive done all the boltons, dyno tuned to a whooping 300whp, and compared to the rx7, the car has no *****. the torque band is crazy linear. there is no excitement to the car when youre flooring it. I feels ike a miata where you can wind it out all day long. I miss the boost and wastegate!
So this led me to buying the only existing turbo kit for the Cayman made by TPC. Got it used for a smoking deal, for $2000 ($7,500 msrp). Its their companies stage 1 kit. Which is non intercooled, 4.5psi kit.
They offer a stage 2 kit, which is basically just a water to air intercooler setup still at 4.5 psi and they want $2500 for this kit. And it uses parts such as a SVT cobra water pump, which i know can be had for $100. And also the intercooler i know you can find for less than $200. I dont want to spend the $2500 for just an intercooler setup, but i want to run an intercooler because in my mind its crazy to not have one.
Since their stage 1 doesnt run an intercooler.
-Does this mean the size of the water to air intercooler i choose will mater because its better than not having an intercooler?
-Can the intercooler be too small even for 4.5 psi?
-Im stuck between two sizes because im not sure if theres a whole lot of room behind the motor.
One flows 700 cfm - rated for 600hp.
Liquid/Air
one is rated for 450 cfm - 350hp
Compact Liquid/Air Intercooler
One has 3" inlet/outlet
one has 2.5" in/out
Coming off the turbo i believe its 2.5" out. my throttle body is 3.25" or 82mm.
They estimate the stage 2 kit for 375-400whp. And the stage 1 is 360whp.
Also, im trying to figure out the exact size of injectors, which no one knows. Stock injectors ive found are bosch 320cc. Ive found bosch makes other sizes from 550cc to the 1600 ive used in my rx7, and even up to 2,000. Would 550cc injectors be the adequate size to run? The injectors i didnt get in my kit, but this company wants $900 for them.
Ive searched and searched the porsche forums for this info, and people really dont know much about turboing these cars. You have the track and suspension guys, and some race techs that mostly only know about the N/A engines, and the rest are just people that dont want to mod their cars and just pay someone else to do everything so they dont know much other then their driving experience.
The only company that does know, is very private and secretive about their information, which is understandable because they developed their system. All i remember is how much ive learned from this community when i was building my rx7. I feel like some of the most knowledgeable people about turbo systems and heat are on this forum.
What do you guys think? Thanks guys for any help!
Its been awhile since ive sold my Single turbo FD
And ive moved to the 1st gen porsche cayman. The way the car feels in the cockpit actually feels close to the FD i think. It took me very little time to adjust to it.
Anyways, ive done all the boltons, dyno tuned to a whooping 300whp, and compared to the rx7, the car has no *****. the torque band is crazy linear. there is no excitement to the car when youre flooring it. I feels ike a miata where you can wind it out all day long. I miss the boost and wastegate!
So this led me to buying the only existing turbo kit for the Cayman made by TPC. Got it used for a smoking deal, for $2000 ($7,500 msrp). Its their companies stage 1 kit. Which is non intercooled, 4.5psi kit.
They offer a stage 2 kit, which is basically just a water to air intercooler setup still at 4.5 psi and they want $2500 for this kit. And it uses parts such as a SVT cobra water pump, which i know can be had for $100. And also the intercooler i know you can find for less than $200. I dont want to spend the $2500 for just an intercooler setup, but i want to run an intercooler because in my mind its crazy to not have one.
Since their stage 1 doesnt run an intercooler.
-Does this mean the size of the water to air intercooler i choose will mater because its better than not having an intercooler?
-Can the intercooler be too small even for 4.5 psi?
-Im stuck between two sizes because im not sure if theres a whole lot of room behind the motor.
One flows 700 cfm - rated for 600hp.
Liquid/Air
one is rated for 450 cfm - 350hp
Compact Liquid/Air Intercooler
One has 3" inlet/outlet
one has 2.5" in/out
Coming off the turbo i believe its 2.5" out. my throttle body is 3.25" or 82mm.
They estimate the stage 2 kit for 375-400whp. And the stage 1 is 360whp.
Also, im trying to figure out the exact size of injectors, which no one knows. Stock injectors ive found are bosch 320cc. Ive found bosch makes other sizes from 550cc to the 1600 ive used in my rx7, and even up to 2,000. Would 550cc injectors be the adequate size to run? The injectors i didnt get in my kit, but this company wants $900 for them.
Ive searched and searched the porsche forums for this info, and people really dont know much about turboing these cars. You have the track and suspension guys, and some race techs that mostly only know about the N/A engines, and the rest are just people that dont want to mod their cars and just pay someone else to do everything so they dont know much other then their driving experience.
The only company that does know, is very private and secretive about their information, which is understandable because they developed their system. All i remember is how much ive learned from this community when i was building my rx7. I feel like some of the most knowledgeable people about turbo systems and heat are on this forum.
What do you guys think? Thanks guys for any help!
Last edited by PhatManBUD; Nov 11, 2015 at 11:39 AM.
Looks like a really nice kit. Re the intercooler, i was going to suggest frozen boost but you're already on it.
Id break out the tape measure and get the bigger one if its going to fit.
The main thing is that it doesnt cause a restriction.
If you can figure out how many bars th IC core has and work out the crossectional area of the air passages, as long as it is greater than your intake piping that should be a rough estimation not taking into account surface friction. Ie; if you have 65mm piping, and the core has 65x4mm bars you want a cooler that has at the very least without getting a calculator out - maybe 17 or 18 rows at the very least.
Heat exchanger goes without saying bigger is better.
The injectors - there are plenty of fuel system calculators online, but you want to think about what you are tuning it on and who is doing the tuning. Ask them.
Of course, I have no idea about Porsches or anything, I just like the idea of what you are doing, and posting because bored. Good luck with it, and keep us posted!
Id break out the tape measure and get the bigger one if its going to fit.
The main thing is that it doesnt cause a restriction.
If you can figure out how many bars th IC core has and work out the crossectional area of the air passages, as long as it is greater than your intake piping that should be a rough estimation not taking into account surface friction. Ie; if you have 65mm piping, and the core has 65x4mm bars you want a cooler that has at the very least without getting a calculator out - maybe 17 or 18 rows at the very least.
Heat exchanger goes without saying bigger is better.
The injectors - there are plenty of fuel system calculators online, but you want to think about what you are tuning it on and who is doing the tuning. Ask them.
Of course, I have no idea about Porsches or anything, I just like the idea of what you are doing, and posting because bored. Good luck with it, and keep us posted!
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