http://www.chevelles.com/cgi-bin/forum/ultimatebb.cgi?ubb=get_topic;f=4;t=018101 was the old topic.

Heres the new scoop..
I got a nice 3000RPM stall converter.

Did a leakdown test on my block and found the rings to not have seated. So She just came back from the machine shop done right this time.

Balanced, Line Bored, crank turned 10/10, honed, polished rods with ARP bolts.

Machine shop said shifting @ or just under 7000rpm is no problem.

So Harold, I'm ready for that cam. The TF80/TF72-112 puts me in the 8.x dynamic compression... PERFECT! It is a solid tappet yes? Unless you have a better recommendation, I'd like to order it, and the valve springs that will be the best. I just can't go any bigger diameter than what I have now:

.460" single spring with damper (110lbs. seat pressure @1.800"/ 275lbs. open pressure @1.250"), .550 Max Lift

If I do, the rockers are going to hit the retainer.

graemlins/hurray.gif I can't wait to get back to the track

Back to the top

Back to top #II! graemlins/hurray.gif

Twilightoptics,

Sorry about missing you earlier.....

The springs you have now are 1.460" OD, correct? With 110 lbs at 1.800" and 275 lbs at 1.250"?
This pressure is a little lighter than what I like to run, although it looks like one heck of a good hydraulic spring.
I've got to check at work today to see what Lunati's part number for my old 8424 spring is. I think it is what they call a 73100.
I rated the 8424 at 130 lbs at 1.800" and 330 lbs at 1.25", and it worked perfectly for 23 years. The OD was 1.450".
I will answer you tonight.

UDHarold

Yep those are my old springs. Looks like the 1 from the OD got misplaced in the cut and paste.

THANK YOU for replying! You totally made my day!
As for a good hydraulic spring... I think it is too. It kept the xe262 planted up to 6300RPM. I know it's not supposed to make power past 5500 but I took it up to see what it would do, and we all kind of figure the heads/intake flow so well, that at 5500 the HP started going down, then at 6000 picked back up to make a peak 10HP more than at 5500! crazy.

Oh and which lifters would you like me to use atop her?
Thanks Harold!