Custom Turbo Problems
Originally Posted by JohnathanKong
Do I need the MAF? I remember it "used" to be near the CAI, but I can't find it. I think my mechanic might have removed it. I will ask him today.
I'm a diyer or I would probably save up for a kit. Plus I am a cheap *** mo fo.
Actually the prospect of being able to afford it was a deciding factor. If I do a custom kit I will be able to get the price down quite a bit. I am even considering fabbing my own manifold, but would rather purchase one. A member on here is trying to sell a partial kit for the car, which would put me almost complete, but he wants alot of money.
The other thing that made me want to do it.
I have only driven one boosted car, and only raced one other. Both were vw golfs, and imo both were slow (the one I drove was chipped, the other I couldn't tell you because the guy was a sore loser
) The other day I was coming home from my dads on the highway. I was getting on and using 5th gear(WOT) so the car was producing some sound. I guess the guy in the lane beside me heard (STI) so he put his foot on the floor. The damn car surged forward(he didn't shift) and it made me start giggling like a little girl. Now I want a turbo, that looked pretty fun and I want to be able to do it
Actually the prospect of being able to afford it was a deciding factor. If I do a custom kit I will be able to get the price down quite a bit. I am even considering fabbing my own manifold, but would rather purchase one. A member on here is trying to sell a partial kit for the car, which would put me almost complete, but he wants alot of money.
The other thing that made me want to do it.
I have only driven one boosted car, and only raced one other. Both were vw golfs, and imo both were slow (the one I drove was chipped, the other I couldn't tell you because the guy was a sore loser
) The other day I was coming home from my dads on the highway. I was getting on and using 5th gear(WOT) so the car was producing some sound. I guess the guy in the lane beside me heard (STI) so he put his foot on the floor. The damn car surged forward(he didn't shift) and it made me start giggling like a little girl. Now I want a turbo, that looked pretty fun and I want to be able to do it
Well go you Dan... a well thought out turbo kit can produce some very good results and a lot of enjoyment lookig at my turbo kit there does not appear to be too much to it really I think the major factor is getting the manifold right making sure that is welded together using the right size pipe and can cope with a lot of air pressure and heat then the next thing is to ensure that the turbo is going to be a good combination of being able to give you fast throttle response and then engine management if you don't get this right then it won't matter how good the manifold is or thatthe turbo is the right size or not
Good luck with it all I know that you will make it work
Good luck with it all I know that you will make it work
right now I am NA, and contemplating going to a turbo setup. If I do I will start exploring options, but I have an NA piggyback and there is more than one member(and one I can name for sure) who is using this and larger injectors instead of standalone engine management.
the manifold is my main concern, followed directly by cost, and then tuning. does anyone know where you can buy prebent piping? I can most definitely get piping(I work for a distribution company), but i have nothing to bend it with, especially for as thick as I would need for an exhuast manifold.
What is the downside to a dump manifold with a turbo setup anyway? On NA it doesn't allow the exhaust to flow smoothly, but with a turbo would this factor be negligible? (I don't expect evo power, just turbo power, so if that's the only thing it limits then I don't care)
What is the downside to a dump manifold with a turbo setup anyway? On NA it doesn't allow the exhaust to flow smoothly, but with a turbo would this factor be negligible? (I don't expect evo power, just turbo power, so if that's the only thing it limits then I don't care)
with turbo dump pipes it is nearly impossible to have them all the same length to give you the same type of even dispursement of gases as you would get from a N.A setup but you still need to go as close as you can it is not impossible just very difficult and a lot of hard work..
N.A headers to give you power and torque they need to be the same length and need to be as long as possible
Turbo manifold needs to be the opposite they need to be shorter runners which is were it gets difficult to make them the same size...
best thing to do is to go see a exhaust maker who has a pipe bending machine and get a prototype made up out of cheap thin mild steel or similar make it up to the correct size and shape etc then when it fits and works then take it to someone to make up one exactly the same as the prototype... this could cost you money but it may also be cheaper than others...
N.A headers to give you power and torque they need to be the same length and need to be as long as possible
Turbo manifold needs to be the opposite they need to be shorter runners which is were it gets difficult to make them the same size...
best thing to do is to go see a exhaust maker who has a pipe bending machine and get a prototype made up out of cheap thin mild steel or similar make it up to the correct size and shape etc then when it fits and works then take it to someone to make up one exactly the same as the prototype... this could cost you money but it may also be cheaper than others...
I have a log style manifold which was from my previous setup with a GT25 turbo which I am selling. I'm just really lazy to put it up. If you want to see some pics, PM me. I haven't really used it much, because if you look at my posts, I had lots of tuning problems with the ecu. In the end, I replaced everything, and now run tubular manifold with GT35 turbo. I think the GT25 turbo has about 10,000 KM on it. The manifold is not powder coated though. It is thermal wrapped instead.
Last edited by JohnathanKong; Apr 5, 2007 at 11:47 AM.


