Paging 89vette...
Thread Starter
Safety Car
Joined: Mar 2000
Posts: 3,581
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From: Springfield VA
Paging 89vette...
Jason,
I responded to your question about my cam in my topic on the More 396. Something I just came across in the article in Vette magazine I was talking about was rather interesting...
When they installed the 1.6 rr's in the 383 they were using the hp dropped more than 40 horses... and the torque jumped by almost 30 ft lbs. It seems that the pushrods were contacting the top of the clearance hole in the cylinder heads. It was hard for them to spot because the friction point was hidden beneath the pushrod guideplates. The heads on the 383 mule they were using were Trick Flow, a Comp Cams 292H cam and a Edelbrock performer manifold with a 750cfm carb.
At 4600 rpms they were turning 478 ft lbs tq and 419 hp with the 1.52s. These numbers were at the crank. Bumping these numbers around and using an 18% drive train lose that comes out to about 303.58 rwhp and 421.96 rwtq on a 383.
Anyway, just food for thought and I saw that you were planning on installing new valvesprings, so what the heck.
I responded to your question about my cam in my topic on the More 396. Something I just came across in the article in Vette magazine I was talking about was rather interesting...
When they installed the 1.6 rr's in the 383 they were using the hp dropped more than 40 horses... and the torque jumped by almost 30 ft lbs. It seems that the pushrods were contacting the top of the clearance hole in the cylinder heads. It was hard for them to spot because the friction point was hidden beneath the pushrod guideplates. The heads on the 383 mule they were using were Trick Flow, a Comp Cams 292H cam and a Edelbrock performer manifold with a 750cfm carb.
At 4600 rpms they were turning 478 ft lbs tq and 419 hp with the 1.52s. These numbers were at the crank. Bumping these numbers around and using an 18% drive train lose that comes out to about 303.58 rwhp and 421.96 rwtq on a 383.
Anyway, just food for thought and I saw that you were planning on installing new valvesprings, so what the heck.
Melting Slicks
Joined: Aug 2000
Posts: 2,388
Likes: 42
From: Murrysville PA
Re: Paging 89vette... (96LT1)
Hey thanks for the advise! What month was that article in? I have all the Vette mags and I didn't remember seeing that. I have the AFR heads but I'll check that out for sure. Thanks again. I'm looking for about 40 horsepower.
Jason
Jason
Thread Starter
Safety Car
Joined: Mar 2000
Posts: 3,581
Likes: 1
From: Springfield VA
Re: Paging 89vette... (89vette)
Jason,
That was the April '02 issue of Vette. I just got my copy within the last week or so. Good luck and I hope you find those horses. :cheers:
That was the April '02 issue of Vette. I just got my copy within the last week or so. Good luck and I hope you find those horses. :cheers:
