so tell us, did that nitrous kit get put back on the motor? 
421 CID completed
Thread Starter
Le Mans Master
Joined: Mar 2002
Posts: 5,889
Likes: 2
From: Castro Valley Calif.
St. Jude Donor '03 thru '26
421 CID completed
This is a dupe to my thread in C4 tech, but I thought the lunatic hardcore fringe might want to know the details 
It's a seasoned 817 block that I was lucky to find with very little core shift, splayed and clearanced. The rotating kit is an internal balance lightweight Scat crank (48 pounds), Scat I beam 6" profiled rods and Ross flat tops zeroed at 9". The final static CR turned out to be 10.6, and judging from the ring breakin, it runs real well on pump gas. The heads are AFR 195 CNC, with a Superram and LPE 219 cam............... I know I'm leaving a lot of potential on the table with this combo, but I had a strict goal of being smog compliant. I'm pretty tired of hearing all the naysayers using smog restrictions as an excuse, so I wanted to see if a comliant motor could produce some big numbers. This is based in large part on an LPE build that dyno'd at 561 torque and 509 HP, so we'll see how mine compares. Everything was port matched to maximize flow, in fact I even got better numbers out of my heads with a valve job and a tiny bit of hand work. Here's the link to my first impressions while driving it and a photo of the motor on a stand:
http://forums.corvetteforum.com/show....php?t=1018255
It's a seasoned 817 block that I was lucky to find with very little core shift, splayed and clearanced. The rotating kit is an internal balance lightweight Scat crank (48 pounds), Scat I beam 6" profiled rods and Ross flat tops zeroed at 9". The final static CR turned out to be 10.6, and judging from the ring breakin, it runs real well on pump gas. The heads are AFR 195 CNC, with a Superram and LPE 219 cam............... I know I'm leaving a lot of potential on the table with this combo, but I had a strict goal of being smog compliant. I'm pretty tired of hearing all the naysayers using smog restrictions as an excuse, so I wanted to see if a comliant motor could produce some big numbers. This is based in large part on an LPE build that dyno'd at 561 torque and 509 HP, so we'll see how mine compares. Everything was port matched to maximize flow, in fact I even got better numbers out of my heads with a valve job and a tiny bit of hand work. Here's the link to my first impressions while driving it and a photo of the motor on a stand:
http://forums.corvetteforum.com/show....php?t=1018255
Team Owner
Joined: Apr 1999
Posts: 21,953
Likes: 1,444
From: Reno Nevada
2024 C3 of the Year Finalist- Modified
Tim - You shamed me into installing my Motown 427 this weekend. So you better have the "laughing Gas" when you get here. That or we could meet on a test and tune day at Sacramento.
Here is a couple of pictures. It was all in by Sat. evening. I have just been piddling around on it now.
http://forums.corvetteforum.com/show....php?t=1020295
Here is a couple of pictures. It was all in by Sat. evening. I have just been piddling around on it now.
http://forums.corvetteforum.com/show....php?t=1020295
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Thread Starter
Le Mans Master
Joined: Mar 2002
Posts: 5,889
Likes: 2
From: Castro Valley Calif.
St. Jude Donor '03 thru '26
George, congrats my friend! I knew it was simply a matter of some "minor motivation" till you did it 
And, that chair in the garage looks kind of familiar to me..............
When I get healthy again, we'll hook up!
And, that chair in the garage looks kind of familiar to me.............. When I get healthy again, we'll hook up!
