Wow!!! Let’s see some dynos I wonder how it soools vs 6870?

 

Yes very interested would love to see Dyno videos and comparison between them. (6875 vs 7275). Would love to see how it carries up to and lag

 

Just reached out to Mark to see if he has a dyno graph of his wife's car which was the test mule for this turbo.

Robert

 

6875 .96 T4 Open. SP front cover so the baby compressor cover option and full 3" turbo back exhaust.

Robert

 

wow more info? boost setup? Look at the spool curve.. 400 tq at 4k!? wow! and 1000whp!

 

That is on Marks' wifes' car before her recent update. Was an Ebay exhaust manifold, 6875, 3" turbo back, 3.4L stroker, E85, stock intake manifold, small intercooler piping. Essentially it was heavily restricted on flow and can easily make more than what is shown on the dynosheet. Boost wise I'm not sure honestly. I would need to get with Jay to confirm.


Robert

 

That Robert for getting that info. My quest would be would these numbers be attainable with 3.0L with flowing intake like hypertune and high compression. And something like gsc s1. Cams

 

Easily, if not more. The 3.4 doesn't do anything except move the curve to the left. With the Hypertune and 3.0l the curve will move to the right and make less torque, but more hp up top.

This will be my next turbo.

Steve

 

that's pretty disgusting. 3" and 1000whp.

 

This is definitely a great turbo for someone with the 1000rwhp goal who wants quick spool and minimal power drop off up top. If you utilize the HP cover with 3" intercooler piping and 4" exhaust this turbo is a sure fire winner!

Robert

 

Thx for replys everyone

 

Are the going to make Divided Exhaust housing for this turbo?

 

I do not believe so as they have had HP 75 rear turbos for quite sometime and never brought them out. These share the same housings as a 7675hp cover turbo which has been out for a while.

Robert

 

thats too bad

 

Any results of this turbo on a 2jz?

 

We haven't ran it with our test mule 3.0L 2J build but this is what was on Janelle's Supra before they were officially released. She is 3.4L RS engine on E85. She was on a 3" turbo back with 2" charge pipe on an Ebay header so plenty of restrictions on the setup.

Robert

 

That car has 2" intercooler piping??
Edit: I guess I read it correctly looking at the posts above.. That's crazy..

 

It was actually 2.5" Intercooler Piping, off of a SP compressor housing (sorry Robert, if I misspoke when I talked to you previously) But yes, there were tons of things you could improve on her prior 6875 setup. 3" Downpipe, Mid Pipe, and Catback, 2.5" intercooler piping, random exhaust manifold. I had originally used parts I had laying around to put that kit together with an old 6265SP and she has methodically improved the car substantially over the years since then. The 6875SP-B-Gen2 was the interim turbo that would fit on the existing turbo system when she got the car.

She coined the term "ProMod 68" when using it.

It's a great turbo, realistically I wouldn't purchase it thinking you're going to make 1,100whp because you have top of the line parts, you will probably make a similar (perhaps slightly higher) power with less pressures and heat than my wife's car did. It will happen more efficiently, but the air pump is the air pump and the 68mm is pretty much out of compressor wheel there.

I think this is a great turbo for 3.4L cars who can benefit (more) from the turbine wheel. 3.0L cars would be fine to use it, and it's probably well suited to someone with big cams and a big intake manifold. If they like running high rpm and the rest of their package will support that, they'll likely see some gains in the area they care about.

For your average 3 liter owner with a stock or modified-stock intake manifold, the pressure ratios and turbine/compressor wheel match of the 6870 is so good, that I don't know I'd trade the spool up for the 7,000+rpm power delta, but that's a decision each owner can make on their own.

 

Mark,

Streetwise which do you recommend, 6875 or 7275?

Looking to replace my 6766 on a 3.4 that’s running out of steam.

 

Honestly I think you'd love a 6875. It comes up a tad quicker (than a 7275, not a 6766,) and matches really well with the 3.4L. The 7275 is an outstanding turbo as well, with roughly 100whp of headroom over the 6875. The 75 turbine is already "doing what it can" at 1,050-1,100whp, but realistically it can be run harder than that. However if you've been living with 6766 power for a few years, the 6875 would still feel like a brand new car. The 7275 is the better option though if you want an "easy" 1,000+whp unit. The 6875 is an "easy" 950+whp unit. You can run it hard and it'll break 1,000, but if you just want to enjoy the next size up with a more proper turbine for your engine, the 6875 is it in my opinion.