[NXS]

yes, there is the middle "island" which is where the turbo is most efficient at.
The way I plotted it out it looks like those turbo's will be almost perfect for a stock 302 or 305 turning approx 5000 rpm.

[zildjian4life218]

so i think i am gonna run stock bottom end with 12.5cc dished pistons arp rod bolts a small comp turbo cam for torque, maybe some 416 heads ported with bigger valves and a tpi intake.

[NXS]

arp bolts are for RPM, not power.....

[zildjian4life218]

How does the component selection look?

[NXS]

good. I heard of a guy using a similar setup pushing 20+ lbs and making 700 hp.. could have been a lie but if you go to turbomustangs.com you will probably find it, I think it was called "when will it grenade" or the like.

[zildjian4life218]

wow thats a lot of power and boost. I am only looking at 300-400.

[zildjian4life218]

would this be a better turbo: http://cgi.ebay.com/ebaymotors/ford-...Q5fAccessories

[zildjian4life218]

i got an hx-35 turbo off a cummins from my friend that needs to be rebuilt. How much does it cost to have these rebuilt?

[jnanam]

Very funny that i came across this because because work was slow today and i did just this today at work and was looking for some input on this. I have read what has been posted before but i will give you the shake down of what i have. Let me start of by saying i by far know very little about the way things run (im a body man) but we have endless amounts of parts and engines at my work and i was tinkering around. I got the turbo off of a 2.0 older Saab and put it on a stock 305, its not a daily diver or anything that will raced or care to hold up but was just interested. i hooked everything up and make an intake and what not and i had to much boost and fuel started coming out of my accerator pump(i could be wrong thats just what i was told. I was wondering if there was anything we could do it fix that or what would need to be done. We did end up running it another way put it releases some pressure and it works great and did give notice able power but is not at its full potential, any advice? Like i said this is just messing around and not ment to be a race car or looking for 400 hp but just to learn something new and better understand things.

[zildjian4life218]

Originally Posted by jnanam

i hooked everything up and make an intake and what not and i had to much boost and fuel started coming out of my accerator pump(i could be wrong thats just what i was told. I was wondering if there was anything we could do it fix that or what would need to be done.

Carb will need to be converted to blow through. Or go fuel injection. How much boost was it making? How did the turbos spool and at what rpm?

[ap72]

those turbos will be just about right. I'd take them apart and rebuild them, clean up the housings while you're at it. Run a large intercooler. You'll make REALLY good mid RPM torque, great for a daily driver.

[zildjian4life218]

Originally Posted by ap72

those turbos will be just about right. I'd take them apart and rebuild them, clean up the housings while you're at it. Run a large intercooler. You'll make REALLY good mid RPM torque, great for a daily driver.

AP do you think they could work on a 350? I was planning on doing something with a 305 just to use up some of them i have laying around but bigger is better

[ap72]

Originally Posted by zildjian4life218

AP do you think they could work on a 350? I was planning on doing something with a 305 just to use up some of them i have laying around but bigger is better

At 10psi intercooled they can reliably flow enough to make about 425hp, so if you want a 425hp 350 then yes. You won't have to spin it over 4500RPM to get there if you do it right. That equates to about 500ftlb of torque... That's where "undersizing" a turbo can help you. high torque values low in the RPM range do nothing for racing, but for street driving it makes a big difference. I would definitely clean up the exhaust housings though and intercool it. Undersized turbos tend to heat up more.

[zildjian4life218]

the thing that worried me about them being too small was the turbine housings are t25.

[ap72]

Originally Posted by zildjian4life218

the thing that worried me about them being too small was the turbine housings are t25.

I assume you mean the compressor?

The compressor is too small to make more than 425 in a 10psi intercooled setup as I outlined. If you want less than 425 then they are fine. Cleaning up the housings, the waste gate, intercooling, and getting a properly matched cam will make a difference. Keep in mind though you will be done making power by 5,000 RPM, after that you'll be heating things up too much and looking to break something.

Not a bad idea for a daily driver though as it will have spool from idle on up, full boost really early.



There was an article about a Pontiac 455 with a single turbo that was way undersized a little while ago- made about 750 ftlb at 3,000 RPM. Only made about 550hp, but the torque was huge. Great for a daily driver, bad for a race car.