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lite75's Avatar
 
Join Date: Jan 2007
Location: Bellingham WA
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What was your A/F ratio at the top end? How about the duty cycle on those injectors? Super cool build!

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75 930, 76 930, 83 SC EFI turbo
Old 11-03-2015, 04:18 PM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #21 (permalink)
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That sounds wicked...now imagine Frank's car being Luke and Bello's being Vader.

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Old 11-03-2015, 05:00 PM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #22 (permalink)
Chain fence eating turbo
 
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Originally Posted by xbmwguy View Post
i will be running18#s on the street. bill is currently working on a "special wishes" set of heads which should be more efficient at the bigger #s, also worth mentioning is the circle track borla with its 6 perforated tubes is believed to be somewhat restrictive. a beefy zork will be in place next time. you may think that the 9 lbs of boost is not worth the hp gain, but I can assure you 638 to 706 is night and day. quite the pucker factor
Are you out of compressor? Cannot remember what turbo you have?
Old 11-03-2015, 05:23 PM
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afr was at 11. we left the static fuel pressure at 60, and the turbo is a garrett gt40 with a billet wheel per chris carrol recommendation. duty cycle was at 88, which will go down at 65 static pressure
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88 930 3.4 ,Twin plugged billet Xtreme cylinder heads and denso COPs, Dougherty custom GT 2 evo cams,pauter rods,Garrett Gt40,ms3x Efi ,1100cc injectors,extrude honed 3.2 intake,TK billet fullbay I/C,MODE headers,KEP stage 2, E-85, 706 rwhp
Old 11-03-2015, 06:25 PM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #24 (permalink)
Chain fence eating turbo
 
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Originally Posted by xbmwguy View Post
afr was at 11. we left the static fuel pressure at 60, and the turbo is a garrett gt40 with a billet wheel per chris carrol recommendation. duty cycle was at 88, which will go down at 65 static pressure
Ah, yep, you're out of compressor. Was expecting more hp at 27PSI.

Not saying it is bad or low, just the increase in hp didn't match the boost increase indicating either turbine or compressor choke or both.

Your engine is nasty!
Old 11-03-2015, 06:48 PM
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Bam!
Nice job, Kris.
Frank -- time for some GoPro video!
Hey Chris thank you !
Means a lot coming from you :-D
Old 11-05-2015, 06:39 AM
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One thing that might be hurting you on that dyno is the fan sitting behind the car blowing the exhaust back into the engine bay. When I dynoed my car we put the fan facing down on the intercooler to avoid ingesting bad air. If you notice engine dyno rooms usually have a fresh air tube feeding the carb or TB as contaminated air (carbon monoxide) kills power. That might be why, out on the road with fresh air getting to the turbo, she felt realllllly fast.......... BTW, nice job guys. Wish I was down there to take a ride in the rocket ship
Old 11-10-2015, 02:22 PM
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Originally Posted by drmatera View Post
One thing that might be hurting you on that dyno is the fan sitting behind the car blowing the exhaust back into the engine bay. When I dynoed my car we put the fan facing down on the intercooler to avoid ingesting bad air. If you notice engine dyno rooms usually have a fresh air tube feeding the carb or TB as contaminated air (carbon monoxide) kills power. That might be why, out on the road with fresh air getting to the turbo, she felt realllllly fast.......... BTW, nice job guys. Wish I was down there to take a ride in the rocket ship
Damn straight on the CO... I agree.
I wanted to close the decklid and strap the turbo fan onto the back window pointing down at the motor... Next time I guess
Old 11-10-2015, 05:03 PM
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Hopefully this armpit of the United States will have cooled down to the 70s by then!! 90 at 8:00 on October 31 is ludicrous
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88 930 3.4 ,Twin plugged billet Xtreme cylinder heads and denso COPs, Dougherty custom GT 2 evo cams,pauter rods,Garrett Gt40,ms3x Efi ,1100cc injectors,extrude honed 3.2 intake,TK billet fullbay I/C,MODE headers,KEP stage 2, E-85, 706 rwhp
Old 11-10-2015, 06:00 PM
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^^^

Speaking of hot climate areas, I ran with your idea of a blocking plate for the cabin intake (made out of very thin sheet steel, hand cut & formed, painted flat black = cannot tell it is there once installed beneath the original screen and frame) - very pleased with zero outside air entering at highway speeds. Great idea - thanks!

Old 11-10-2015, 06:10 PM
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