well its kinda of a super long story but ill give it to you short my car was blown up twice while on e85 one stock motor and one built motor its not just the e85 it has a lot to do with some people think e85 is super fuel and you can get a little crazy on the tunning i.e to much boost but thats all i can speak about but s*** happens but we can talk about the new setup

 

stock frame turbos are great but they do have limits like once you pass 29psi most stock frame have a nasty tapper . for road racing the turbos are great but most of them max around 500whp some make it to 600whp with a fuel upgrade i.e racing fuel or e85 . i would like to have space to grow down the road so no research need you hit the nail right on the head stock frames are great if you plan to stay in the 500 to 600 range

 

yea e85 will basically take unlimited timing with no knock lol gotta know when to stop.

 

Really? There are plenty of cars that make 500 600 whp and are above 29 psi. I for one make 544 one 33 psi. Mikey of spec ops he makes 750whp on a bb black, Tscompusa makes 600 above 40 psi, Kracka makes 500 on pump gas one his ef3. Curt brown 605 whp on bb green. I mean if you want time to grow why not just order a 42r now and not even waste your time with anything else?


Here some info for the op

https://www.evolutionm.net/forums/ev...block-e85.html

https://www.evolutionm.net/forums/ev...ts-thread.html

https://www.evolutionm.net/forums/ev...ld-i-sell.html

Look at these for starters. I realize you have an x but for reference I'm late.

 

The science is simple. Smaller A/R turbine housings create more backpressure, fact (basically a smaller pipe, fluid mechancis). To make the same power as a bigger turbine housing, you have to run more boost due to the reduced volumetric efficiency from the increased backpressure, fact (fluid mechanics). More boost = more heat, fact (thermodynamcis). More heat = more stress, fact (otherwise, we wouldn't need all the cooling).

 

Curse you need to pay attention when you are in the X section lol. Remember the X stock frames are WAY more restrictive than the 8/9. 600whp maxed out on E85 is about all you get from an EF4/Fpblack, maybe 620 if you push it. The X turbos won't hold over 29psi at 9k rpms unless you have a really ****ty flowing motor, with good cams and head the X just won't hold the boost with our stock frames (too restrictive).

And kracka has an X, making 400whp on an Ef2

 

not saying you cant make the power, after about or around 29 or pass 29 psi stock frames start to tapper, you run 33psi it most-likely tappers to 26psi and on top of that its on e85 like i put in my post. once again stock frames are great but what you do on high boost with a stock frame you could do on low boost with a larger turbo i.e 6262 please take one more look at my post "once you pass 29psi you run into a tapper ', i think you missed what i was getting at

 

THANK YOU MURLO

 

Correct, X turbos and VIII/IX turbos are night and day. Hell, the whole car is night and day.

I think I can make 650whp on a DBB FP Black on a Evo X we are currently building. It will be a sleeved 2.2 and will have just about every mod in the book and on E85. I am very excited to see how it turns out. We are going to be using some of the same tricks we used on my IX that helped up get to 750whp. In the end the process is all the same, air flow = power.

Just to give you guys an idea, I tuned a stock block X on 93 at 508whp w/ FP Black very very conservative. I think a full build on tilt I would like to hit 650whp safely. There are a lot of things you can do to make power that a lot of people over look. One, is compression, which more times than not, seems to be over looked by a lot of people... The whole not being able to running high compression on a turbo car days are over! No reason in the world to do a 9.5:1 unless you are on 91 oct. 10:1 or 10.5:1 is what should be used. Every full point of compression is about 4% more power. So on my car, compared to a stock compression build, my increased compression is giving me an extra 52whp ish. Compression can make a lot more power and doesn't stress the turbo as much. Just some food for thought. My motor is around 10.8:1. It runs on 93 and with practicaly no * and only 19psi it still makes mid 500s. Who is to say you can't run a race car on pump? Tuning makes the world of difference as I'm sure most of you know.

To answer the OP question... a 6266 will be lag and a lot for a road race car, unless you know how to drive and use antilag along with some other tricks. I would personally get an EFR turbo. Your pick is up to you but from what I have seen, they are great. I want to do some testing and thinking about doing it on my car but still have not decided completely.

Have a great day guys!

Mikey

 

Thanks for the input whish i could have got some of your insight before i did the motor ,maybe the whole 10:1 thing could have been done .lots of people talking about EFR

 

Compression is win.

For reference I made essentially the same power on my new setup (2.2L 10:1 compression) with 27psi vs. my old setup (2.0L stock compression) at 38psi.

Compression and displacement are your friends. I almost went 10.5 but was afraid to.

 

Your correct my bad on that It was your post of your car I beleive that made 514 on the ef4. I know I saw somewhere where he posted that but it was you post. And yes I do know am in the x section hince the I realize I'm in the x section use these for reference.

 

Thanks Mikey I knew I saw posts with 500 on the x with stock frame turbo somewhere.

 

No it holds 33 all the way past 7k.

 

On the 8/9 yes it could hold that out to redline. Here is what the stock frames look like on the X.



Notice the cliff after 6900

All I meant by notice the section you were in is that the 8/9 stock frame world is vastly different than the X.