Hey guys,

I am about ready to purchase a single turbo kit and had the GT4094r as the one I was going to get. I called up RX7 store and he told me that the 4094 is too big for my horsepower goal. I was looking to make a solid 450hp @ 15psi, but my overall goal is 500-550hp. He told me about the t04z but based on average numbers on the forum its not a solid 450 @ 15psi you would have to run at least 20psi?? Now, would the GT4094r truly be too big? It is really that laggy that it won't be fun on the street?? I have a pineapple racing medium street port and was thinking of a .95a/r for the GT4094r housing. I will be running pump gas and will have water injection and all that stuff. Any help would be appreciated! P.S. I live in Colorado where the air is a lot thinner here if that makes a difference. Thanks

 

get the 4094r. You will be fine. .95 is also ok.

 

Solid 450 at 15 psi it get a Gtx4294r

 

I would go with the GT over the To4Z, higher nickel content turbine housing, and cheaper to replace chra if you blow it. Performance should be similar between the two, maybe a tick slower on the GT as its a big shaft turbo( more durable however) If price isn't an issue then definitely GT. We have the GTX4202/4294R in stock too...

 

Thanks for the posts guys. But the gtx4202/4294r is out of the question way too much money. Would like to hear more from guys that do have the 4094r in their setups and their experiences.

 

Look at your post and your power goals the gt4094r will not reach that power at that boost

 

I agree, if you want 500-550 (@ 15psi) you need to go LARGER! Unless you mean you want 450 @15psi but will turn the boost up for 550 then it will be fine. I run this turbo so I am not just guessing.

 

Yes you are correct sk8world. I was looking at a minimum of 450 @ 15psi. I will turn up the boost to reach 500-550. Thanks for the help. I placed an order for a gt4094r this morning! Thanks everyone

 

Goodluck I don't think it will do it i hope it does for your own sake

 

Honestly I never made a full pull on the dyno below 18-20psi. As we were having such bad boost creap. I will go back and get a chart to post. I was thinking it made around 450 at gate psi (15) but started to creep bad. But I do know 550 isnt an issue!


Dyno video: http://www.youtube.com/watch?v=xLftxux7FIE

 

Erection!

 

That's fine, I got the biggest turbo I could afford. I just didn't want to have to turn a turbo up to 30psi to get over 500hp. Thanks everyone.

 

Hey mate not trying to be negative over 500 up is achievable on 22-23psi easily just don't want you to get the wrong idea don't forget a good exhaust manifold means everything use a **** one and you won't make any power at all

 

do you have any numbers yet from your upgrade?

 

No RX7store is out of all housings for the 4094r. Been waiting a few months for it lol. I'm going to get a refund and go with either a 7168 or 7175 billet precision ball bearing instead.....

 

Check with ATP turbo if you still want the 4094r or Sean with aspec.

 

Wao I have no idea why people are saying that the turbo will not make the HP goals you have. I have a GT4088R and made an easy 447 @ 15. I didnt tune past 15 I didnt get the watermeth in time for the tune. Tuner Said that we will go up by 20hp per pound. All im saying is if he has a good setup and the pineapple ports are good he should be fine. And ATP is a great Garret distributer.

 

I get the 4094 thru ATP as do most companies and they are out of them

 

You can't beat the rx7store price for the 4094 kits

 

kit maybe but i have yet to see anyone selling the turbo for 1600-1650 like some places

 

SO shifting gears from gt4094 to 6768 precision billet bb.... I have two options for a divided housing an .81 or 1.00. This car will be for street with highway pulls. If I had to choose between faster spool or top end I would choose faster spool. The thing that is confusing me is that I am 4000+ in elevation, so if at sea level I would choose the .81 but since Im higher in elevation should I go bigger housing??? Thanks guys

 

i wouldnt get the .81 if it were me. you will hold back that turbo in the end. if you want the best boost responce the 6765 with a 1.00 is very good. but for overall power the 6768 in a 1.00 or the 4094r in a .95 or higher. all of these turbos will hit 440-450whp at 15 psi. its when you get past 25psi where the 6768 and 4094 will walk away from the 6765.

 

I just ordered a 4094r BB locally for under $1500. Looking forward to see what this can do with my setup. This thread and a few others here helped a lot!!

 

update yet?

 

i guess comparing our dyno numbers with yours is not really proper.