Here are the pics of my build so far. This is a GT88 going on my 02 WS6 with 408, ported L92 heads, 230/240 600 114 cam, all on 10.25:1 compression. I am stuck with the compression. I wish now I would have went with 9:1 but it is what it is and I do not plan on boosting much more then 10psi. I might try it up to 15 at the track with race fuel and meth, but on the street I plan on sticking with 10psi max with 93 octane and meth. I still have to finish the cold air piping going up front, I also need to pull the front end off so I can start to install my intercooler and run that piping. I ordered the header wrap. I will pull it all off and wrap the hot side once I clean out the piping. I am still looking to get a turbine side exhaust blanket, and I am considering buying some kind of wrap for the cold air side to protect it from radiant heat from the hot side. I am thinking of mounting the oil return pump on the "t" brace I built to mount the turbo. The "T" brace supports the turbo without any piping. The piping just helps keep the turbo from moving. I am also in the market for a 5" mandrel bent 90 as well as the 5" v-band clamp and flange for the down pipe. I plan on making the turn towards the rear with the 5" and then split it to two 3" outlets so I can run one 3" to the drivers’ side outlet and the other to the passenger side outlet. So I am looking for that piece as well. I think I can make it if I need to.

So take a look and let me know what you think.

 

Here are some more pics.

 

And some more pics.

 

so far so good it look like! keep us posted.

 

I got held up today I replaced my gas on my mig welder, picking up a new full bottle Friday from the local welding shop. Installed it today and was about to start welding some more and guess what, the new bottle was empty!!!!!!!!!! That realy pi$$es me off!!! that puts me another week behind schedule!!!!!!! I am going to take it back tomorrow and light into those idiots!!!!!!!! They better not try and charge me for another bottle!!!!!!!!!!!!!

 

pretty sweet. now hurry up and finish so i can ride in it.

 

looking good should be pretty nasty when your done

 

Why is the turbo reversed from the normal setup? The cold side piping is going to pick up a lot of heat from the exhaust.

 

I placed it like that to make room for the 5"down pipe. Yes it is close to the exhaust, but I am wraping the exhaust with header wrap and I am going to get the heat shielding to also wrap the cold air piping all the way to the front of the engine cradle. I am hopeing this will stop any radiant heat from going into the cold air piping.

 

You will still get some radiant heat, but you plan definitely helps minimize the transfer. Five inch down pipe is a big boy. My 4" fit after 1320 clearanced it for me with a BFH. A 5" to 4" transition would be ok too. A 4" down pipe is able to flow a lot of power without back pressure.

I'm interested to see how your setup spools. What are the specs on the turbo? What a/r? Twin scroll?

 

No it is not a twin scroll, I have thought of changing the turbine housing to make it one and then use one of those boost actuated gates to help spool it, but I am going to wait and see how bad the lag is first. It is a 1.06 AR turbine housing.

If I still have temp issues after the wrap and AA Intercooler with meth, then I could go AW on the itercooler or spray the intercooler with NO2. The hole point of the turbo was to get away from NO2, So I will go to an air to water intercooler first.

 

Looks like it is going to be pretty low. But this is going to be bad ***!

 

Yeh, I am conserned with the ground clearence. Ithink it will be between 4-6 inches of clearence. I am trying to tuck the lowest points as close to the wheels as possible so it will lift more when the wheels go over something. I am not realy worried about speed bumps since it is a garage and trailer queen now, but I am worried with clearence during loading and unloading it from the trailer.

 

what size piping is that going into the turbine housing?

 

The exhaust is stock manifolds going into 2.5" cat deletes that I built, then it goes into a 2.5" slp y-pipe, from there it is 3" mandrel bent all the way to the turbine inlet, all of this except the manifolds will be wrapped with header wrap. I will also put a turbo blanket on the turbine section and wrap the waistgate piping to the waistgate.

 

do you think there would be any benefit to step down to a 2.5" before the turbine housing to speed up the velocity any? I am gonna do something similar with mine, I am gonna use the stock piping after the y to the turbo, I am using stock manifolds, cat deletes as well, and the same y pipe you have too.

 

im not sure about the big 88's but I know in my experience the 3" was to big for mine and really slowed things up spooling .. you might be better off keeping 2.5 all the way to the turbo, Zombie will probably know more about that.

 

Interesting setup... Has some common ground with mine... and some signifficant differences. I would be concerned about that CR unless you plan on running racegas all the time.. make sure you put a whopping FMIC on it as well to keep your IAT's down (your in TX after all) or you will be putting together a new engine!

10Psi on a GT-88 will be interesting... hows the ground clearance?

 

I do not know about the turbo lag yet. I do want about a 60' worth of lag time to allow me to hook up off the line. I am counting on the 3600 stall convertor to help reduce lag time. If it is more then wanted then I will try one of those split turbine housings and the pressure activated gates to help spool up.

Yes the compression is a little higher then the norm, but I do not plan on running more then 10 psi on pump gas and 15psi on race fuel. I am running a front mount intercooler and meth too. If that prooves to not be enough then I will switch to a air to water intercooler. Also, it has turned into a trailer queen that will most likely see a minimum of a 50/50 mix of pump and race fuel when she does come out to the street. I rarely drive it during daylight hours and when I do drive her on the street, I never race her there. I guess I am getting old. I am fortunate to have my wifes car and my pickup to DD.

 

Its hard to see in the picks but it looks like nothing is going to be lower then my crossbar for the bmr torque arm or the drivers side exhaust pipe on the slp y-pipe.