justinp20012500

With what you have as far as fuel I would be partial to the 18cm housing.

That’s of course if money is tight. You can find one of those for really cheap >$75.

Cruise EGT's will be up a 100-150 degrees, but on a ***** out run you still will see 1600*, but you will see them when the speedo is passing 90. I am sure with the 12 you are running now that you see 1600* after you hit 60MPH.

Single turbos, not matter whose you run will have some drawback. (IE spool-ability, excessive heat on a sustained max power run)

Ocmechanx

Will look into that,....?have never seen an 18cm2 housin for the 35 where would I look esecially at 75$ lol

Really I've seen 16 and 14 all over the place but any higher were into the whc1's area, or will they interchange with a hx turbo?.....hmmmm

lol don't mind me just the cheap bastard commin out in me

apwatson50

I think you estimated about right, I would imagine you would still spool the turbo even with a 18cm housing by 2k, as in full boost. You may have to change your driving style to keep your low rpm egt's down as in don't lug the engine, you'll just have to down shift and use rpm's to your advantage. its still better than melting a piston!!

In your situation you will see lower egts with any housing bigger than the 12 especially since you have your wastegate blocked.

Ocmechanx

LOL
thanks

changin can't be worse than how I've gotta keep'em down now,bein ya got a 92 any chance if ya know if whc1 exhst changes out with hx turbo's or where to get a 18 for a hx?

apwatson50

You bet all the exhaust housings are interchangeable on all the holset turbo's that dodge used,all the hx, whc, and hc except the hy35.

Ocmechanx

Alright well where would ya fine one at as far as a dealer supplier ect?

justinp20012500

Classifieds here, and TDR.

Check Ebay also.

If you can find someone with a 1st gen you might be able to trade them. I can't remember off the top of my head which ones came with that housing.

Ocmechanx

Throw another at off the other post got goin garrett gt40-82?...........


would this be better or worse than the hybrid 35 as far as drive pressures and temps?

this is my other cheap option at the time lol..............cheap bastard I know

justinp20012500

It looks as if that turbo has a .94 A/R ratio exhast housing. (.80 a/r housing is roughly 14.77cm) So a .94 housing might be ok, even though very large it could still work.


I am not sure what flange they use to bolt to the manifold either. After a quick serach of google, it shows many RX-7 owners running that turbo. I would think (this is my very uneducated-dumb assumption) that thier motors would have a hard time pushing the turbo to 20 psi. I am sure you would push much much hard. How harder? I am not sure. But it would suck BAD to breakt he comp wheel off the shaft and have the motor "eat" the fragments.

signature600

I don't think the Garret chargers are capable of running the high pressure ratio's us Cummins guys like to use. Something about the bearing design not liking higher RPM like a Holset or Schwitzer.

I think the 7.3L Powerstrokes used a GT38, but they don't live too well above 35psi. Stock is ~17psi if memory serves me correctly.

Chris

apwatson50

I have heard the same thing about the Garretts not having stong bearings to run above 30psi.

For exhaust housings, a 16 can be bought for about $150 from any of the vendors, 18 came on 89-91.5 and 93's, and 21 came on 91.5-92. These can be found on ebay or in TDR classifieds.

cumminsdriver635

My 16cm didnt seem to make much difference, but i think my timing is really bad retarded, and is making my EGT's really high. Lag isnt to bad. Im used to the extra lag now, so its no big deal, and it will only get better the more fuel i add I also live in Ky. I have an 18.5cm housing, but im just not sure if i wanna sell it or not. Im horrible about that. Just figure if i get enough fuel i might wanna use it someday, but i would consider selling it if you're interested. Just shoot me a PM. I dont know how far away we live from each other, but if u wanted to meet up to get it that would be fine. Just let me know

Eric

Ocmechanx

Well can't really meet up with anybody right now but when I throw my trans back together I think I'm gonna go see my relations in casey co might drop ya a line if ur on the way, nice ta meet new people now and then, not sure if I wanna go with the 18 right now,.........used to boost building at 13 1400 lol, who knows I might try it anyway, I'm dumb like that..

cumminsdriver635

With my 16cm housing i can still have 10lbs of boost by 1300rpm's at 1/2 to 3/4 throttle. Not to bad really. I do miss the 12 at times, but im gonna leave the 16 on. Yeah. Holler at me if you come to Casey County. Not to far from here. Maybe we could meet up?

Eric

Ocmechanx

Sounds good if I can just get my 13/8input shaft

Been parked in the shop less tranny too long