I already have a T4 setup and I want to back the power down. I'm not sure if it makes sense to sell my setup and get a stock frame setup or just sell my turbo and get something smaller or just keep the turbo I have and back the power down.

For those who don't know I have a 2.4 LR 10.5:1 motor with a Front facing T4 1.00 6265 that has been very good to me. Response is awesome and power is more then I need. I've decided given the time I have and the distance and focus I'm looking at I want to road race the car more then drag race it.

My goal is high 400's on 93 and mid to high 500's on E85. I know there are a MYRIAD Of choices to get me there but these are the choices I'm looking and possibly simplify my setup.

1). Toxic fab/JDL front facing stock frame manifold with BBK-C-BB. No one has really put any numbers up on this turbo and it looks like it will fit my power goals perfectly.

2). Keep the T4 setup and get a smaller turbo like a HTA82 or PTE 5857.

3). Send my PTE 6265 in for the 6262/6266 CEA upgrade and de/retune

Option 2 may be cheaper but I may be waiting a while for a buyer of my turbo. Option 3 may be 2nd cheapest but I think it may be more turbo then I need. This is also more then likely the quickest option. Option 1 I could potential break even on and it's also the option achieves the simplicity I'm looking for but again it may take a while to get what I want for my setup to break even.

 

i think option 1 would make a much more fun to drive car than 2 or 3. On the other hand before you go tear the car down you could try to just detune your current setup and see how it feels.

 

Car is possibly undergoing a make over in the near future anyways so down time is neglible. Just want to do this once.

 

Considering you are probably sick and tired of delays and failures I'd go with a gtx3071r with T4 twinscroll (if your manifold is twin scroll) hot side. Theres just no way that can disappoint you. And it would have monster instant spool on a 2.4. I'm not aware of customers having BBK-Cs yet, and it may be a while longer until they do.

 

Yes I have a twinscroll manifold. I've been speaking with CBRD and I don't there won't be any time constraints to get one (unless something happens) for my time frame. GTX 3071r? Never thought about that choice. Thanks for making my decision harder. Lol.

 

Haha! You're welcome . The GTX3071r spools like a OG green but can make 550+ on e85. But the nice thing is it will make a lot of power even on pump gas, they're pretty efficient turbos. And they're just dead reliable. No cracked turbine housings and BS like that.

 

EFR 8374. Can't beat the Ti turbine wheel.

But to answer your question. Weight is the most important factor...so a lightweight manifold that has short runners for a stock appearing turbo setup... will probably be the lightest. I would run a BB Red or a BB BBK-B.

 

I vote for a Red. It's the ultimate responsive turbo that still pulls like a train up top.

 

Surprised you recommended that instead of the efr 7374(I always mess the number scheme up). I wanted the 8374, but, between the availability and size (won't fit in the front with my manifold). Is the 7374?) Smaller dimensionally? If it would fit and availability is better then I would def. Seriously consider it (and you would be a bastard like deeman, lol). Keep the suggestions coming guys.

 

I would imagine a Green or a Red would suffice. The car would be quite an animal with about zero lag. I know mine is a hoot with a low compression 2.3 and a Black. A twin scroll HTA82 would basically be a Black if you wanted to save loot. Good luck with your decision.

 

7670 is GTX3076 size in regards to power, but waaay better in response.

That's why I suggest the 8374... 3582R power with 3076 or better transient response. You get to have your cake AND eat it too.

The 7670 is smaller dimensionally that the 8374. I believe they call it the "B" size compressor and the 8374 and 9180 are both "C" size comp housings. Turbine housings are the same size, less their internal machining to fit the bigger wheels.

I think the 7670 will make about 575-600whp on decent setups and maybe that's all you need. I would go to the 8374 so I could rev the crap out of it and not have the power taper.

 

Can the lay people get their hands on the EFR turbos yet? A lot is riding on your testing of the 7670 and eventually 8374 Eric. I've looked endlessly for dyno graphs and still don't feel like I understand its capabilities yet on the evo or similar platform. Geoff's results weren't encouraging but he said his wasn't set to kill yet so..... be the first! DO IT!

And I can see we're trending up and up in size again for recommending turbos while smurf was initially looking to scale back. Power is addictive isn't it . And I personally think the GTX3071 will give the 7670 a good run for its money in terms of response and max power but there are other forum members that can be a lot more technical with the reasons (03whitegsr, 240z twin turbo).

Cost not a factor I wouldn't stay with stock frame turbos but if that is a factor then yea they're good options. In the past the JB stock frame turbos could be pushed to make great numbers but not last very long there. It will be interesting to see how the bb MHI turbos do.

 

Anyone have a idea what the longevity is supposed to be on the newer bb stock frame center sections? I need to revisit how much space I have to play with if I was to compare the 8374.

I could sell my current setup and break on a good stock frame setup. Downgrading, depending on the choice of turbo I may have to put an extra 500 to 1000 over what I could sell my setup for.

 

For the same reason 03white - Michael stated... the 3076 will make more peak power than the 7670 I have no doubts, but you gain a huge amount of transient response for the minor differences in peak power.

I'm working away and rest assured I will put the screws to it when I get it on the dyno.

 

Stock Frame at those levels, Go red or black and have the spool and response a single scroll can only dream of.