2nd Generation Specific (1986-1992) 1986-1992 Discussion including performance modifications and technical support sections.

Help me choose the right turbo for 375ish whp

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Old 02-09-07 | 02:34 PM
  #26  
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Originally Posted by yusoslo
Greddy Exhaust manifold, Greddy Type R 47mm wastegate, and a IHI RHC7 turbo

on a 3"dual exhaust no cats no nothing.
Stock ported S4 T2 motor....will stay that way till it blows.

Greddy fmic

I havent found out a whole lot about that IHI RCH7 except that it came with the older greddy kit, and its near impossible to get parts for. Looks like its maxed at about 375-400.
Old 02-09-07 | 02:36 PM
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Originally Posted by J-Rat
Nope, mine was a series 5. Bryan didnt make Stage 4 turbos out of series 4 turbos. If he does now, thats news to me.

And do you have a comparison of boost levels versus rpm before and after the BNR?
yep he does now i think maybe a year or two ago no.


no because my car ran like crap before i swaped the turbo over to the bnr, nothing related to the turbo itself just the car was crap.

im waiting for a new radiator to come in. as soon as it does, ill take a ride with my laptop and record the boost patterns off the microtech and post it on here.
Old 02-09-07 | 02:41 PM
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Originally Posted by projectredsuns
ill take a ride with my laptop and record the boost patterns off the microtech and post it on here.
Cool! That will work! If the numbers you record are good, then I will retract my statement.
Old 02-09-07 | 02:44 PM
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Ive found 2 sites that offer rebuild kits and parts and service for the IHI RHC7 turbo..
Old 02-09-07 | 03:11 PM
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I hope this helps.. I managed to find a compressor map for the IHI series of turbochargers a long with a few more sites for rebuilding and selling parts for this turbo. I have no idea how to read these things so someone else will have to chime in here..

Old 02-09-07 | 03:36 PM
  #31  
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Originally Posted by J-Rat
#1. You dont just throw a hybrid on and go

#2. Its not a LITTLE lag, its SIGNIFIGANT.

My car has had stock turbos, BNR turbos, and now a full single. I think I know what the differences are.

Dont get me wrong, Bryan makes a great turbo for those that dont want the hassle of going to an aftermarket manifold. Just dont get fooled into thinking they are not without some penalties.
Well thats what I meant, Still gotta have piggyback or stand alone, and other supporting mods, but its easier to just go hybrid than to piece together a manifold, turbo, wastegate, ect. For the cost and ease, Id say 4k rpm is a little lag IMO. Wasnt tryin to tell you wrong dude, just stating how I feel about the hybrid setup
Old 02-09-07 | 03:53 PM
  #32  
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Not a turbo I would personally mess with.
Old 02-09-07 | 03:57 PM
  #33  
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Originally Posted by J-Rat
Not a turbo I would personally mess with.
Why is that?
Old 02-09-07 | 04:02 PM
  #34  
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Originally Posted by FrankV702
Why is that?

#1. Its not widely used.

#2. My garrett turbo has the latest and greatest technology to help boost more efficiently which garantees lower intake temps.

#3. Four or five repair shops nationwide is not what I consider blanket wide support.


Looks like the turbo flows about 69 pounds at 2.6 ish bar.

What turbo you all put on your cars is up to you, but I personally dont mess those types of turbos.
Old 02-09-07 | 04:57 PM
  #35  
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J-rat what are you (or will be) running for a turbo now after you topped the T-61?
just curious
Old 02-09-07 | 04:58 PM
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Originally Posted by J-Rat
#1. Its not widely used.

#2. My garrett turbo has the latest and greatest technology to help boost more efficiently which garantees lower intake temps.

#3. Four or five repair shops nationwide is not what I consider blanket wide support.


Looks like the turbo flows about 69 pounds at 2.6 ish bar.

What turbo you all put on your cars is up to you, but I personally dont mess those types of turbos.
So basically the only reason you wouldnt use it, is because its not a widely used turbo like your garrett?

Other then that.. How does it seem likes it flows? Would it meet the goals this guy is looking for? I have no idea how to read that compressor map so I wouldnt even be able to tell. Is flowing 69lbs at 2.6ish bar good?? Thanks J-rat.
Old 02-09-07 | 04:59 PM
  #37  
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Originally Posted by Zbrown
J-rat what are you (or will be) running for a turbo now after you topped the T-61?
just curious
The new GT4094R. Judging from your turbo choice, you are going a little harder then me. I am about to quit at the 550/600 hp mark.

Last edited by J-Rat; 02-09-07 at 05:07 PM.
Old 02-09-07 | 05:04 PM
  #38  
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Originally Posted by FrankV702
So basically the only reason you wouldnt use it, is because its not a widely used turbo like your garrett?
No, its mainly because its a dated turbo. Again, this is a personal preference, but its not NEW. I dont really like the idea of slapping used turbos on my car. There isnt any way to tell what they have been through.

Other then that.. How does it seem likes it flows? Would it meet the goals this guy is looking for? I have no idea how to read that compressor map so I wouldnt even be able to tell. Is flowing 69lbs at 2.6ish bar good?? Thanks J-rat.

69 pounds would equate to about 600 horsepower on a rotary. 2.6 bar is about what.. 41 pounds or so? Doesnt seem like a very efficient turbo to me. Will it make 375 on a rotary? Probably, but thats about all you would get out of it unless you want to run crazy boost.

FYI, I got the numbers from my buddy Trevor. I cant read maps as good as him yet, but I am learning.
Old 02-09-07 | 05:06 PM
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Thanks J-Rat.. the info is appreciated..
Old 02-09-07 | 08:29 PM
  #40  
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damn this thread is becoming very informative.

I just have to think for a little bit before I decide to buy.
Old 02-09-07 | 08:48 PM
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Haha.. yea.. Also now I know a lot more about the turbo as before I didnt have to much info on it.
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