Well it is that time of the year, where the car goes up in the air, and experimenting begins again.

Today I had a chance to test fit a large physical dimension (compared to what is available now) turbo, which should open up some more doors for the future ST builds. The turbo at hand is a 6765 but with a H compressor cover, the only cover available with the 71mm and 76mm turbos found here (76mm):

http://www.precisionturbo.net/Street...PT7675-CEA/279

This (the compressor cover) would be the determening factor as far as fitment goes because of it's large outside diameter.

H cover on the left, and E cover on the right



So with some minor tweeking it does indeed fit:






3" compressor outlet:







The H cover is about 1" larger in diameter than the E cover, but with about a minute of under car "massaging" one is able to create enough room to make things fit well. The turbo still sits about 1/2" above the skid plates, so the ground clearance is great. A small sacriface to make in order to fit a good size turbo under the car.

In the near future a larger FMIC will be fitted (22"x12"x4.5" core) to accommodate the extra flow, and it will look something like this:



I will update this thread once the fitment has been completed.

This is a project that will need a bit more attention before it is ready to go, but luckly we have 5 months of winter on the way, so there is a lot of time. A couple of other minor things will have to be consider but all that is as mentioned, minor. Things like a larger wastegate (PTE 44mm), and a 3.5" intake are in the works. I am also looking at making the hot side (turbo to FMIC) out of 3" diameter tubing instead of the standard 2.75" that I have been using. This would be only for this turbo option.

I should mention that a turbo this size should not be considered with the stock block, because it is rated to flow 120lb/min by Precision.

 

So you ARE going for the 76mm! Cool!

 

If this turbo fits, and it does, the 76mm is the same as far as physical dimensions go, with larger interna wheels. I just happen to come across this particular turbo locally for a fraction of the price of a 76mm turbo

 

Nice work Sasha. We just took a deposit on a motor that will be fed by your new 76mm setup this spring. Excited to see the results on the dyno!

 

So the turbo you going to use us 7675? How is the spool going to be on that ? Also in the picture it looks as if the turbo is at an angle? With the compressor pointing down. If that's the case than you might get oil in the compressor housing. At least I am since my turbo is at an angle.

 

If your seals are good then no oil should "leak" into the compressor housing. I just had my turbo out last night putting a new turbine housing and the reservoir was full of oil and i stood it up on end with compressor housing down and didn't have a single drop of oil leak into the compressor housing after sitting on the bench that way for 20+ minutes. It did pour out the vent on my reservoir though.


Looking good. Friday the 6765 with the exhaust cutout goes back on the dyno for high 20's boost.

 

How is the spool on a twin GT35R setup that you see around here? If you want power, you will loose a bit in spool, it's just how it works no matter what platform you are working with.

The turbo will sit perfectly level, and even if it did't there would be no issues. The reason it is at a bit of an angle is do to using a down pipe that was not made to work with this turbo. A new down pipe/up pipe is all it needs. Have a look at the angle a GT3R sits in a Subaru:

 

Hmm the Hx40 I'm running always gets oil in the compressor housing but its slanted down and I thought that was the reason. The turbo was rebuild with new seals so I don't know why it would leak. Maybe once the shaft starts spinning oil passes through??

I'm hoping to see what numbers you get out of the 6765 since I'm planing to upgrade to it. Also thinking about 70or 71 mm turbo if I can't get to my 600whp goal

 

Hmm So I guess my turbo does have blown seals than ..

As for spool I know you have to sacrifice a bit, but was wondering if you perhaps had an idea how much slower it will spool compared to the 6765

 

There are too many factors to consider, as each build is different. It would be a guessing game and I don't want to get in to that, same goes for HP potential.

 

its gonna be ~5000 rpm spool to a boost level that makes good power.

if your car doesnt rev out to 8000 rpms or you like stop light racing, its not the turbo for you.

 

And thats the bottom line!

 

I've got a rev up with stock 7200 rpm red line , for now. And light to light racing is not what I'm into. I'm asking questions out of curiosity.

How does this turbo compare to a GT series turbo?? More or less? GT42? 45?
I don't plan to run this big of a turbo ,

 

ah, I like this!!!!

 

A big single and a properly built motor can get you THIS!! Or you could just buy this for ~$35K.

http://www.youtube.com/watch?v=OPlw5...yer_detailpage

 

lol hopfully you wont have to wait long im just itching to get back, if everything goes well i should be buying the engine middle of next month and you will be able to see the max out of the 6765. car should be getting loaded on the trailer sometime today to head to hawaii

 

The 6765 CEA has been proven to make 800whp on Supras, so it should be capable of well over 700whp on a properly built VQ.

 

Cass thanks for posting that vid of Hal's car gives me inspiration every time i watch.

Cant stand TA /stang/camaro owners especially ones that have no idea what Z's can do .

When built right...

 

IIRC that car was like 44k... watever it was its Bad azz I must say so....

Everytime I see that car I want one jus like it!

*edited so not to be misunderstood....

 

definitely build the manifold 3/4" shorter so you can use the quick spool valve