hey guys i want to go turbo but i have alot of questions about it i had a turbo civic before but just wondering about the s and how the motor will react to boost with a headgasket i want to go with the inline pro kit for sure but with stock motor what is it capable of i also what size injectors will need i would like to run 15 psi and it my daily driver

 

Well, there are guys running 25+psi on stock block. From what I have heard, the stock block is good to a maximum of 600rwhp. I do know that there are guys running 450-550rwhp on stock blocks. As for what you need to run 15psi varies with what size turbo you use.. 15psi isn't going to be the same for say a gt28rs as a gt35r. With that being said the bigger the turbo, the bigger injectors you will need most likely. Here is a formula to calculate the size injectors you will be running.



B.S.F.C is brake specific fuel consumption - How much fuel you are using per horsepower per hour. In most cases a naturally aspirated engine will have a B.S.F.C of .50. This means that the engine will use .50 lbs. of fuel per hour for each horsepower it produces. Turbocharged engines will want to be at .60 lbs. per hour or higher. Most injectors will max out at 80% duty cycle and this is the accepted industry standard.

So if you are running say 450rwhp, using 4 injectors at 80% duty cycle, you will need a minimum of 886cc injectors. So you might want to run 1000cc injectors just for the extra duty cycle. Now I do know that there are guys running 400+rwhp using 750cc injectors.

If I am wrong please correct me. Oh and keep in mind ANYTHING above 10psi will require a thicker HG or else you are asking for trouble.

 

Speaking from personal experience, I recommend a tubular manifold (more efficient than log) braced from beneath (from factory exhaust brace threads to the turbo or manifold bottom) to reduce NVH. And flex couplings in the downpipe. Also lean toward top-mounted turbo for ease of access to the turbo for servicing / tightening of bolts on it. I have the Full-race (bottom mount) and am getting a V-band turbine to downpipe connection -- otherwise the turbine bolts are no fun to get at / tighten / fish out if they break.

Inline has a gorgeous log if you want to go log manifold though.

Agree with what's posted above on injector sizing. Get a good tune as well. Search for posts by Fperra, Timg, Foxer10, Reborn 56, PeanutButter also -- much knowledge there.

Best,
Stanford

 

Contact Ya or John at Inline Pro
They have great customer service.

 

thanx for all the info guys also i would like to run a gt35r or 30r turbo and how good is the greddy emanage would it do fine with the setup i would be running?

 

There are a few questions you should ask yourself before going turbo 1. What is your budget. 2. What type of driving/performance do you want.

You can go a lot of different ways and before you continue to pollute your brain with everybody else's opinion talk to the guys that run em and install em.

I recommend Inline, and speak to Ya. He will not lead you in the wrong direction. I personally think all the advice in this thread is great, but meaningless unless you understand that everything needs to work in conjunction with one another. Which is all dependent on budget and your future plans.

Cause trust me once you get to 400whp you'll want 450whp, then 500whp and so on. Think about building a set up that you can expand with, and find a really good local tuner.

 

I have been researching FI for prolly 4 or 5 months now. There are indeed so many options out there. From what I have found, the cost of a SC will cost you the same as a nice turbo kit with about the same power levels. I.E. a vortech or Comptech kit running 350-400rwhp. The turbo kit has the advantage there, where it is easily expandable. The superchargers, once in that power level are mostly topped out. With either choice, you will be looking at installing the same supporting mods at 400+rwhp. Such as fuel system, HG, engine management etc.