Big Turbine Wheels

bullfrogjohnson

bullfrogjohnson

Big Girl!
Nov 20, 2006
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Locust, NC
What is too big on a Dmax auto truck? I have run the 74/83 combo with great luck. Getting ready to try a 83/87 with a .90. I wonder if the 96/87 would be too much to stay on top of for a single. I have my sights set on a S480 96/87 T4:eek:

Who has been pushing the limits and what are your thoughts:D
 
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CurtisEmery

CurtisEmery

New member
Mar 21, 2008
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Ontario, Canada
I will be able to tell you how it works shortly. The truck should be up and running soon. I have a friend with a S475 and a pretty large turbine, around 87mm and it spools easily.
 
TrentNell

TrentNell

Finally underway !!!!!
Jul 7, 2008
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slc tuah
I have 2 freinds running S480's , not sure on the turbine size though . not the most streetable but they can get them to light when the need too :cool2:
 
JOHNBOY

JOHNBOY

< Rocking the Big Single!
Aug 30, 2006
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Saegertown, Pa
bullfrogjohnson said:
What is too big on a Dmax auto truck? I have run the 74/83 combo with great luck. Getting ready to try a 83/87 with a .90. I wonder if the 96/87 would be too much to stay on top of for a single. I have my sights set on a S480 96/87 T4:eek:

Who has been pushing the limits and what are your thoughts:D
Click to expand...

I have been thinking about this alot. I mean alot! I dont think the 96/87 is a good choice. AFAIK the only housing you can get is an undivided 1.32A/R T6. it flows around 62lbs/min. That is GT55 territory. To big! The 74/83 flows around 42lbs/min in a 1.1A/R T4. Just a touch less then a GT42 turbine in a similar housing. I dont have flow data on the 83/87 turbine. I have been told it flows very well though.

My problem is this. My drive is high with my GT42. I have been looking hard at the S480. What I can not decide is 74/83 or 83/87. Are we better off to go with the smaller turbine and use a wastegate to control drive? This will give us easier spooling and should limit drive pressure problem and the heat involved. Or are we better off to go to the bigger turbine ungated. Live with the harder spooling but the simpler wastegateless set up. The price difference between the two setups is not much. Tough call.
 
bullfrogjohnson

bullfrogjohnson

Big Girl!
Nov 20, 2006
4,167
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Locust, NC
I was mistakin, My new wheel is gonna be a 80/87mm combo. I have never seen one before but Dan (zstroken) said it is a borg wheel so I am interested to see how it goes.
 
jpowel29

jpowel29

Member
Feb 1, 2008
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Bentonville, Arkansas
I think the 87mm wheel will make better power above 4k rpm (which is where I see my GT42 fall flat on the dyno).

Let me know how the 80/87 combo works on your truck. With tuning I don't think it will be hard to light and you may want a looser exhaust housing (vs a .90).
 
ecc_33

ecc_33

Junior Member
Aug 10, 2006
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Amanda, Ohio
Travis, what are you running as far as fuel now? Dual fuelers? Injectors? I know my s475 cleans up ALL of my fuel at full tilt. That is with stock injectors right now but spools fairly easy
 
bullfrogjohnson

bullfrogjohnson

Big Girl!
Nov 20, 2006
4,167
1
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39
Locust, NC
ecc_33 said:
Travis, what are you running as far as fuel now? Dual fuelers? Injectors? I know my s475 cleans up ALL of my fuel at full tilt. That is with stock injectors right now but spools fairly easy
Click to expand...

I am running a single cp3, stock injectors. Getting ready for duals and 45% overs. Got a 3.0 S400 now and love it. Spools great with a .90 housing but it clean up all the fuel I have now.

[YOUTUBE]EfAYz8JUEx8[/YOUTUBE]
 
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