Compound help, 12 to 1400HP

DieselheaD said:
I completely understand I can't justify spending so much on a race only vehicle. There's more than one way to skin a cat though as far as building a bulletproof shortblock that doesn't cost an arm/leg. I don't see the need for a deck plate till you need well over 1500 hp.
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Glad you got that out of your system, let's move on with the thread now!
 
Depends on budget. GT turbos would be awesome but like Marshall said $8k. For 1200hp and on a budget street truck app I would look around 75/87 box unit over 591 SX. My set up is very close to that and spools up great. Many folks have made 1200hp plus on that combo. Some fuel only.
 
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Would a BB turbo not be the better choice in the secondary position? The thrusts always take a beating, and BB will hold that load much better than a JB turbo. And a GT42R is in the $2k range with regular cast housing. I was only into my GT4202R with tial housing for $2200. GT55 is around $3500 last time I checked, but that was a number of years ago.
 
Is there a holset turbo in the range of a gt55? Something that might not be as good but still works.
 
RyanMayo said:
Why all the recommendations for such large setups? I know 12-1400 is a lot of power, duh, but like was said above, Lavon is doing those numbers with a 300/400 setup. The guy says the main purpose of the truck is to beat up on street cars, well you're going to want it up on boost fast for that.
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The S300 turbine(73/80mm) and GT42(75/82mm) are very close in size, however the Garrett would offer greater thrust reliability. The F-trim(106mm) and GT55(102mm) would have similar response times, the benefit of the UTV would be lower cost and a lot of options.

RyanMayo said:
Admittedly, I have no experience at that level, so maybe I'm missing something here... but I felt like he hit the nail on the head in the original post when he said 467/591.
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Granted the S500 comes with decent size compressor wheels(88-91mm), the issue is the turbine is a bit lackluster, the large S400 turbine in a 1.32AR hosuing flows more than the S500 in a 0.85AR housing.


97rada said:
Is there a holset turbo in the range of a gt55? Something that might not be as good but still works.
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An F-trim would be the closest, however a Garrett UTV is the same size and would be cheaper.
 
Smokem said:
The S300 turbine(73/80mm) and GT42(75/82mm) are very close in size, however the Garrett would offer greater thrust reliability. The F-trim(106mm) and GT55(102mm) would have similar response times, the benefit of the UTV would be lower cost and a lot of options.



Granted the S500 comes with decent size compressor wheels(88-91mm), the issue is the turbine is a bit lackluster, the large S400 turbine in a 1.32AR hosuing flows more than the S500 in a 0.85AR housing.




An F-trim would be the closest, however a Garrett UTV is the same size and would be cheaper.
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The S591 with 1.10 AR should be rated closer to 1600hp - 170lb right? 480/96 is like 1200hp - 120lbs? If it was a dog spooling I would suggest the 400 for OP but it is not. Quite a fun turbo actually. I have the 1.0 housing but will step up to the 1.25 and larger AR on top turbo due to the setups nice manners.
 
Tate said:
Would a BB turbo not be the better choice in the secondary position? The thrusts always take a beating, and BB will hold that load much better than a JB turbo. And a GT42R is in the $2k range with regular cast housing. I was only into my GT4202R with tial housing for $2200. GT55 is around $3500 last time I checked, but that was a number of years ago.
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Was referring to the GTX turbos that are allot more than that.
 
Had my s500sx fitted with a billet 98mm wheel. I love it.

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The GTX turbos are amazing but very steep. I normally wouldn't run one as a second stage compressor. I have one on Frankenstein but that is because I already had it. The gtx compressor really shines at high pressure ratios which is not needed in a second stage turbo. I agree with what has been said about the benefits in the thrust capacity of a ball bearing secondary as well.
 
Smokem said:
The S300 turbine(73/80mm) and GT42(75/82mm) are very close in size, however the Garrett would offer greater thrust reliability. The F-trim(106mm) and GT55(102mm) would have similar response times, the benefit of the UTV would be lower cost and a lot of options.



Granted the S500 comes with decent size compressor wheels(88-91mm), the issue is the turbine is a bit lackluster, the large S400 turbine in a 1.32AR hosuing flows more than the S500 in a 0.85AR housing.




An F-trim would be the closest, however a Garrett UTV is the same size and would be cheaper.
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The reason I was interested In Holset stuff was we get them In from time to time at work. Being I get a decent price on cummins stuff you never know. What do the Garret UTVs run? Are the 42's also that good compared to a s300? Always heard the turbines didn't like heat
 
97rada said:
Are the 42's also that good compared to a s300? Always heard the turbines didn't like heat
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Super Farm turbochargers are most likely the most abused in any market, and the GT42 is and has been the thing to beat for some time now.
 
Smokem said:
Super Farm turbochargers are most likely the most abused in any market, and the GT42 is and has been the thing to beat for some time now.
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Good to know. I know little about turbos and even less about Garret.
 
Smokem said:
The S300 turbine(73/80mm) and GT42(75/82mm) are very close in size, however the Garrett would offer greater thrust reliability. The F-trim(106mm) and GT55(102mm) would have similar response times, the benefit of the UTV would be lower cost and a lot of options.
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Out of pure curiosity, why the suggestion of the F-trim as opposed to the G-trim? Other than simply ease of spooling being that he's looking to run it on the street the majority of the time.
 
adamsmarshall said:
Out of pure curiosity, why the suggestion of the F-trim as opposed to the G-trim? Other than simply ease of spooling being that he's looking to run it on the street the majority of the time.
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Easier to find the non clipped version.
 
Is price the only reason behind looking at using the UTV series versus the equivalent HC5/HX80?

Just curious as I am looking at compounding both my big trucks, have the turbos for one already but haven't decided on an atmosphere turbo to go with my GT5523, though I have a 3.9" holset here that just needs a turbine upgrade.
 
There are 11 and 13 blade versions of the G-trim.

The E-trims I have are 11 blade and I think 98/130.
 
You guys have any info on the hx83a? I know it has the cast iron comp cover that needs swapped but decent place to start maybe? I can have one for under 600
 
Smokem said:
Super Farm turbochargers are most likely the most abused in any market, and the GT42 is and has been the thing to beat for some time now.
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just got off the phone with a turbo builder.... S472 billet wheel with a double ball bearing with 10mm shaft. said it will hold better then a GT42.
 
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