Please post pics when you receive your baby...I'm still on the fence. At this point looks might nudge me one way or the other...lol

Thanks.

Chris

 

No problem, it should be here in a week or so.

 

Some pics. I'm an idiot and forgot the obligatory beer can next to the turbo for size reference, but here you go. My exhaust manifold is going to have to be modified i believe in order for it to fit, but we'll see. Its just barely rubbing on the right most bolt on the GZ lower. I may be able to grind it a bit off, but i'm not a fan of doing that.

 

Turbo looks great!!!

What are the specs on your engine port wise etc....also at what rpm do you expect to see boost?

Can't wait to see your numbers...

Chris

 

I went back to a street port on this motor. I really can't say for sure on the rpm, but i'd like to see at least 15 lbs by 3750. All i know is that it will spool faster than my old one and probably make more power at that pressure level. I'm changing a lot of things at once, so i'm probably just going to have to wait and see.

 

I see you have a custom intake manifold, any info on this? Did you port the remaining UIM and LIM when you made that custom intake?

The reason I ask is because I have been waiting for a 13BRE for a while which I paid for and I am about to go with a REW just because Im tired of waiting and I would like to know how to go about making it breathe like a BRE on the intake side of things...its going in an RX-8 which has shorter gears so I need a power band that will at least get to 8-8500rpm or it will feel like a truck.

Chris

 

Its like 1/2 of a custom manifold. I bought it off another forum member a while ago. I've yet to run it on the car, so i'll hold off on posting about it until i've got some numbers.

Honestly, i think for only 600 to the wheels the stock manifolds will work on both motors. I'm just hoping to make more with less.

 

That Ernie's old mani?

 

Yep, sure is.

 

Here is my 6765 at 22psi, so you should be able to make it to 600 with a 6768.

 

Don't want to rain on your parade, but with the open 0.96 housing and a pretty aggressively streetported T2, I didn't hit 15 psi with the 6768 until well over 4000 RPM. I think it was around 4300 or 4500 RPM, can't remember. But that wasn't with a proper tune on it, I was still somewhat working a base map before the cracking both front and rear irons. Let us know how it goes though, and worse case scenario there's a member on here that can source divided housings for that turbo, PM me if you need any info.

I'm excited to see what it will do, since I didn't get a chance to fully test it.

 

thats a interesting thought but i beg to differ. It depends on tune and manifold design, intercooler set-up porting as well as exhaust. I made 535hp on 20 psi, precision 6765, water injection on the custom long runner manifolds that i make with a full 3" exhaust and i get full boost at 4000 and no lag between shifts.

 

I find increase in power after 5,000 RPM interesting. That's roughly a 70-80 rwhp increase in 500 RPM vs the 25-30 per 500 RPM that happens after. I'm experiencing a similar powerband using the butt dyno with my new 6765 with the H-cover and new fully divided manifold /w 4" exhaust. Any chance you could provide a log of a pull? Also, what cover are you running?

I even made a thread about it since I found it so odd...

https://www.rx7club.com/single-turbo-rx-7s-23/odd-torque-powerband-w-h-cover-6765-a-955335/

thewird

 

yes

 

ryan1, do you have a rerouted or open dump wastegate? trying to gather the differance from yours to silverfd. also how come the pull stopped at 7k? usually power keeps climbing until 7500-76 depending on the portwork an turbine a/r.

 

Mmmm, ok. I'm talking about a 6768, same turbo as Zinx. My manifold was divided tubular, open volute housing (like his), used an Air-Water intercooler (considerably less pressure drop and intercooler piping) 80mm exhaust, large streetport, AI injection, dumped wastegate. And I already posted that my tune wasn't ideal, I didn't get a chance to play with timing to reduce spool, so that would be the only factor to make a difference. Besides, I didn't tell the guy he couldn't, just that in my experience I didn't.

 

Rerouted. They were calculating rpm, not picking it up. Pulls were to 8k so they dyno calcs must be off.

 

Don't have a log of the pull, using an s cover.