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Topic: Aftercooler / cam swap dyno results
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TM88GT
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Member # 105
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posted
Previous combo / dyno box stock Cobra intake, Edelbrock 6037 heads(no porting), "mystery cam" (more on this later), 65mm TB, 75mm MAF, 36lb injects, 190lph pump w/ T-rex, shorty headers, Bassani X with cats, Vortech SQ (3.33" / 6.87" pullies), RACESYSTEM powerpipe - result on 91 octane gas: 372 rwhp 403 ft /lbs torque Very torquey combo, but it dropped off severely at 5500rpm. I thought it was the "mystery" cam that was causing the power drop, but without pulling it, there was no confimation. Back in Nov - My water pump took a dump on me. As I was replacing the pump, I noticed that there was oil in my coolant. You all know what that means, blown HG. So I figured, as long as I replacing the HG, I'll have a cam swapped in, as well as some other tid bits. The complete list of changes were as follows: Edelbrock 6037 decked .010" and o-ringed Crane 2031 cam FMS 42lb injectors Pro-M 80mm MAF 255lph intank pump Vortech Aftercooler re-tuned chip (very conservative) The dyno results on 91 octane gas (no ice in cooler tank):
442 rwhp 432 ft / lbs torque The car is a totally different animal. It pulls to 6000rpm (and up), and it doesn't drop off at all. The cooler core stays cool enough to lay your hand on it (so much for the heat sink theory), even after 2 hrs on the dyno with a dinky fan in front of the car. Now I need to rebuild the read-end. That thing is whining like a baby now. BTW, this mystery cam turned out to be an explorer cam, which is what comes in the FRPP "Cobra" shortblock.
Posts: 142 | From: Hayward, CA | Registered: Dec 2000
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Stimson
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Member # 51
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posted
Nice! So thats where you've been hiding. How much boost are you seeing? You're easily some tires and practice away from 11 second timeslips!
Posts: 2373 | Registered: Jun 2000
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TM88GT
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Member # 105
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posted
quote: Originally posted by st5150:Just make sure you tell the LS1 guy running 12's with a K&N and cat back that the whine under your hood is a BAD vacuum leak
I'm not worried about that - my ego is not big enough to care about some guy in an LS1. Only young guys with big ego's and lots of testosterone have that problem. Once you get in your mid 30's - you'll see what I'm talking about quote:
Your rear end will told up for a while. You won't be doing 1.60 wheels up 60 foots for a while. If you had a LS1, I'd worry about the rear end.
Actually - my rear is shot. I'm already doing the "one-wheel-peel", and now it's starting to whine (bearings). So there's no way I'd drive 2hrs and get stranded. quote:
How does that cam idle?
To be honest it's pretty tame to me. It's not as lumpy as an E cam, but not as tame as a stocker.
[ February 26, 2002: Message edited by: TM88GT ]
Posts: 142 | From: Hayward, CA | Registered: Dec 2000
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Stimson
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Member # 51
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posted
"Rebel79" has that same cam with a similar combo and that thing is really lumpy, thats why I asked. Impressive numbers for 8 psi! Take it easy on those vipers
Posts: 2373 | Registered: Jun 2000
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