chdesign

Hey everyone just thought I would let you all know that I finished welding up the header for the CHDesign turbo kit and it shoudl be on within the month time permitting. Also the NOS kit goes in tomorrow set at a 50 shot. Once the turbo goes in it will be bumped down to a 20 shot and used as a aux. intercooler basically and also for that little extra omph if I need it Well if anyone has any questions let me know I will be hapy to answer them.

chdesign

Heat Disipation is the key, at a 7 PSI situation the temp of the gases leave the turbo can well excede 200 degrees so if you have a vented intercooler it shoudl be around the smae temp as the air hitting it so there is a large diference in the air temp as it works its way through the fins inside the core of the intercooler. I have seen temp readings on a eclispe where the inlet temp was close to 300 degrees but the exit temp from the intercooler was about 100-125 degrees cooler so there is a very large difference. and with the NOS injection I am runnign it will cool the intake close to another 75-100 degrees when spraying so you can see the advantages.

SilverPro

The construction, design, and material used in making intercoolers allows the intercooler to act as a heat sink where heat is dissipitated allowing a cooler charge to go through lessening the chance of detonation. Yes, a water-to-air intercooler is more effecient in cooling the intake charge but a system like that is a lot more complex than a traditional air-to-air intercooler.

Protege man

What are the horsepower range you are looking at with the turbo and intercooler? And did you get any 1/4 mile times with it yet? I'm getting real excited now about the turbo. please keep us updated.

ProtegeRider

Hey Chdesign,

can you post some pics of your car and the mods please!

chdesign

I'm working on getting some pics up but I'm waiting till I have the turbo kit on and its about done give me about 3 more weeks....the Iriduim Plugs and NOS went in tonight but I still have to wire the arming switch and momentary button....other than that though the kit is on...I have a couple fuel problems though the return line is leaking at the fitting goign back to the tank so it seems I am going to have to cut up the stock fuel line and break out the JB Weld if that doesn't fix it nothing will...I will let you guy know how the NOS goes I am waiting on the right jets though it was jetting for a V8 when I got it and had to order new ones which will be here Wensday.

conton

Hey chdesign. I 'm working on my own homebrew turbo kit as well. My header design is in process and I'm working on a neat intercooler setup.

I would be interested in more details about your setup, what kind of power your going for etc...

I'm going for reliability, driveability, and efficient power increase. My initial target is a responsive 185-200 with the ability to grow down the road. I drive my car many miles a year in the rain, snow, sleet, highway, city, vacations, sometimes I tow a trailer with it etc...So it needs to be a rock solid setup and controlling heat is key.

Where are you tapping in for the EGR valve? In the header or after the turbo?

tony

HEY CHdesign I think that everybody is working on a turbo ..............here is a question is the 1990 probe gt 2.2 4 cyl the same as the 2.0 4cyl from the MP5 ? a friend of mine that talks to MAZDA crop. said that it is the same if so why not use that turbo header and set up for that ???????? if this works then there is my turbo kit I got the car in the carport waiting

chdesign

whoever you talked to at Mazda Corp is an idiot...if that were possible we would see alot more Turbo Pros than we do now...it is a totally different engine and no parts from teh 1st gen Probe/MX-6 will interchange with our engines....as for the EGR valve I made another provision on the header for teh tube and used the stock fittings.

conton

Do you see any problems with hooking the EGR up after the turbo? As in placing the fitting in the downpipe vs the manifold.

chdesign

NO not this time I'm just maing the easy way out log style header but out of a little better steel than what TKT uses...I wouldn't suggest putting the EGR fitting on the downpipe as you would probably have to run a long tube from the downpipe and cause turbulance back on the turbine wheel or you would have to fab a whole new EGR tube as the line itself is a steel line and is very hard to move.

conton

Yeah. I was also thinking that EGR before the turbo would just be another source of heat/pressure lose and bleed off boost. Just a theory though. As far as my header. I don't know enough about, nor do I think I have enough room to employ any resonance tuning techniques. Even with a little T-25 turbo there isn't much room to play with header design too much. At least with my current knowledge and fab techniques. My goal is to get as much exhaust to the turbine as fast as possible with minimal heat loss. I'm making a few extra flanges and I plan on experimenting with different header designs down the road as I gain experience with this setup, and time permitting.