The 421 is alive!!!
Melting Slicks
Joined: Mar 2002
Posts: 3,108
Likes: 126
From: S.L.C. UT
Hey Guys, Rick will post the numbers soon. Here's a clue, the small AFR 195 Comp ports run out of steam at 6000rpm, but they also make alot of torque... even with a miniram on it.
Last edited by tpi 421 vette; Sep 12, 2011 at 04:57 PM.
Racer
Joined: Oct 2007
Posts: 478
Likes: 1
"the small AFR 195 Comp ports run out of steam at 6000rpm"
Thats what I want to know. I have the same exact heads and I am interested in the limit of what they can do. I figure Ricks motor will push them to the limit.
Thats what I want to know. I have the same exact heads and I am interested in the limit of what they can do. I figure Ricks motor will push them to the limit.
Le Mans Master
Joined: Mar 2002
Posts: 5,889
Likes: 2
From: Castro Valley Calif.
St. Jude Donor '03 thru '26
Race Director
Joined: Feb 1999
Posts: 12,772
Likes: 17
From: Indianapolis IN
195's are great for a usable RPM band,,
unless you are 100% drag car spending all of your time from 4000-7000 rpm, the 195's make the most of the cubes.
My, Miniram and HSR both made identical HP at 6000rpm as it did at 6500 rpm. BUT, the HSR made more TQ
unless you are 100% drag car spending all of your time from 4000-7000 rpm, the 195's make the most of the cubes.
My, Miniram and HSR both made identical HP at 6000rpm as it did at 6500 rpm. BUT, the HSR made more TQ
Le Mans Master
Joined: Mar 2002
Posts: 5,889
Likes: 2
From: Castro Valley Calif.
St. Jude Donor '03 thru '26
I max at 4800-5000, but I'm undercammed. Based on your experience Larry, would you have recommended something in the 228-230 range & a 114 CL for my car? (not that I'd screw with it anymore).
Thread Starter
Race Director
Joined: May 2003
Posts: 10,749
Likes: 41
you guys are funny.....
i spent the whole day at the golf course, and now i am looking after my 2 girls.
expect a thread tonight with some pics.
FYI. I reved it to 6500 (not bad for 195's).
i spent the whole day at the golf course, and now i am looking after my 2 girls.
expect a thread tonight with some pics.
FYI. I reved it to 6500 (not bad for 195's).
Race Director
Joined: Feb 1999
Posts: 12,772
Likes: 17
From: Indianapolis IN
the question to me always is, where is the border line so I can go up to it without going over it,, my cam is actually perfect but the tuning becomes more difficult due to the valve overlap, that's why I dumped a wad on the FAST 2.0
I have read where some XFI's (pricey) now can allow you to idle in Alpha N and run in MAF or Speed Density, thus taking the sensors out of play at idle, but letting them do their job off idle.
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Le Mans Master
Joined: Mar 2002
Posts: 5,889
Likes: 2
From: Castro Valley Calif.
St. Jude Donor '03 thru '26
Yeah, the big problem for me is passing the sniffer.........it would have to go out to a 114 CL. I don't want to steal Rick's thunder here, but since he's gonna do a new thread I wanted to get your input because of all the changes you've made on your car.
It never ends does it..............
It never ends does it..............
Thread Starter
Race Director
Joined: May 2003
Posts: 10,749
Likes: 41
Thread Starter
Race Director
Joined: May 2003
Posts: 10,749
Likes: 41
Thread Starter
Race Director
Joined: May 2003
Posts: 10,749
Likes: 41
I parted it out man. Was just trying to find the video for a friend of the 421 at idle.
Bought a C6 after that, and I have since sold that as well. Looking to find something else now, but with back seats for the kids.
What's new with you??
Last edited by 88BlackZ-51; Nov 10, 2014 at 01:49 AM.
Safety Car
Joined: Jun 2000
Posts: 4,870
Likes: 25
From: Long Island, NY
Vic
Le Mans Master
Joined: Jul 2004
Posts: 7,163
Likes: 61
From: NH
St. Jude Donor '14
Maybe a G8 GXP is in your future? Or an '09+ CTS-V. I hear they're fun, and they're becoming competitively priced.
Thread Starter
Race Director
Joined: May 2003
Posts: 10,749
Likes: 41
Its not a vette but it has the heart of one, and I have a feeling it will be faster then most. Its not as fast as the 421 but quicker then the C6.
https://www.corvetteforum.com/forums...s-500rwhp.html
