Finally started the twin turbo project!
07-23-2010, 08:40 PM
#242
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Sorry, I don't have any numbers for them. I looked for compressor maps also and couldn't find them online. I can tell you they worked well on my 346 and they work even better on the 402!
07-23-2010, 11:26 PM
#244
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hmm, it's hard to tell. My converter was on the tight side with the 346 and with the added torque of the 402 it has loosened up some. By the time the converter flashes it's in boost. I'm very pleased with the combo! When my gopro camera comes in I'll post some video of it.
Frank
Frank
07-24-2010, 01:09 AM
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Your build has inspired me. Building all forged 402, low compression, Precision hp 6265's w/.82 ar. Using 'vette manifolds. Can you tell me more about clearancing for the 4" stroke.
07-31-2010, 02:13 PM
#246
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Great looking build! As far as crank clearance, I had to put space down the windage tray and cut that hole in my F body oil pan then weld a plate on the outside. Other than that you just have to verify your pickup isn't too close to the bottom of the pan after you space it down.
Frank
Frank
07-31-2010, 02:38 PM
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Got to run the car at the track today and had a fairly good outing. I'm having some major traction issues. My best 60ft was 1.57! I had to pedal it through most of 1st gear and short shift into second to get it to do anything. But it's not all bad, I still ended up with my best time to date. It went 9.32 @ 152mph! Needless to say I'm pretty excited about that. Boost was set at 15psi so once I get some more seat time and get the traction issue straight, I'll start turning it up.
07-31-2010, 04:17 PM
#248
Got to run the car at the track today and had a fairly good outing. I'm having some major traction issues. My best 60ft was 1.57! I had to pedal it through most of 1st gear and short shift into second to get it to do anything. But it's not all bad, I still ended up with my best time to date. It went 9.32 @ 152mph! Needless to say I'm pretty excited about that. Boost was set at 15psi so once I get some more seat time and get the traction issue straight, I'll start turning it up.
is it a manual vb th400? if it is, you could launch in 2nd gear. that would help with the traction
Last edited by 71 chevy; 07-31-2010 at 11:40 PM.
damn frank...you need to put that thing on a diet 
08-02-2010, 06:47 AM
#256
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Car weighed in at 3533lbs. I was expecting 3200#. lol
Here's a vid of the pass.
http://www.youtube.com/watch?v=_7cNy...eature=channel
Here's a vid of the pass.
http://www.youtube.com/watch?v=_7cNy...eature=channel
08-03-2010, 08:37 AM
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Thanks for the kind words everyone!
Frank