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05-03-2001, 08:16 AM | #1 |
Registered Member
Join Date: May 2000
Location: Mt. Vernon, IL USA
Posts: 12
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Project White Turd - 1.5MPH Increase with Catback!
Well, its been a long time since I made a posting regarding my 246K mile motor and I ran my best time ever tonight with it. You will be surprised to see how much it picked up with a Dynomax 2.5" Catback with Super Turbos. The catback replaced a non-mandrel bent 2.25" system with 2-chamber flows.
Here's some history on this car: 1989 White LX Hatchback 302ci 246,000 mile shortblock Ported Stock Heads retaining stock valves GT-40 Intake (lower cleaned up a bit) Stock MAF and Throttle Body Stock Cam 180deg Thermostat K&N Conical Filter Crank Underdrive Pulley 1 5/8 Equal Shorties 2.5" Mac Prochamber 2.5" Dynomax Catback w/Super Turbos Stock 2.73 gears 5 Speed Manual 3365lbs Weight Previous best in car: 14.15@98.12 (2.06 60ft) 73 deg F 30.01 Barometer 45% Humidity New Best with catback: 14.008@99.51 (2.053 60ft) 83 deg F 29.98 Barometer 60% Humidity The car picked up nearly 1.5MPH with a damn catback!! Man, I can't wait to uncork the TB and MAF. I really think I will find another 1.5-2MPH. And with a gear and some traction, this puppy could be running low-mid 13s !! Now I know a lot of you may be thinking, 14s under a 100mph, big woopie. A compression test revealed a highest compression of 135psi in one cylinder while the average among then was around 127psi and the lowest was 91psi. I really think this car with a fresh shortblock is capable of turning 102-103mph trap speeds with the current mods. With a fresh shortblock, I think 105-106mph isnt completely out of the question. What's everyone else think? Am I being too optimistic here? Am I happy over nothing or is my tired shortblock performing pretty decent given the mods? Thanks, Tony |
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