Advice needed

Rat Patrol said
The XE275HL is a fairly mild hydraulic for a 408 stroker.

Remember strokers will soak up around 8 degrees duration over a std stroke SB

Personally though I reckon your bigger problem is in your heads - if you want to "go deep" into the 12s...., you really need around 250cfm peak to match a cam that will work to 6000 rpm in that build.

I'd doubt your making peak HP much past 5000 with that combo unfortunately.

Whats your shift point?

FWIW, I have a very similar build with heads that flow 243@ .550, i run a 245/252 duration cam with .520/.540 lift, same 3.89 gears as you and a fatter 3650 lb car.

My best is 12.3 at 111mph - with a very ordinary 60ft.

Your MPH is way low and its the heads and cam thats doing it IMHO.

1 fst Dart said
105 mph is spot on with a 12.81, That car with a 11:1 stroker should be in the 11's
My 360 at 9:1 and 2900 lbs runs 11:60's with a lot less head and cam
What RPM do you shift at, I would suggest no more than 5500
A cam in the 250 @ 050 range would probably help a lot

Hi guy's,

I shift anywhere from 5500 to 6200 motor falls over at 6600. Car with me in it is around 3500lb the old wagon is still street driven to & from the strip.

The guy who done my heads is an old drag racer from way back used to run street cars in the 60's & made his way up to Pro stock's even though he has retired he is still building drag motors for super charged outlaw cars & such. When we ran our first 13.0@ 102mph he said that he didn't think that the car could do it then we had the headers made & I mades a set of chassis connectors & we dropped into high 12's & he was gob smacked.

I don't know what power it is making now to run 12.8 but I asume that if we can get the new motor to anywhere near 500+ it will be all good. I would love to run consistant 11.8.