Dusty
some of you know my buildup from last year. heres the results after a year of driving and a cam swap amongst other MINOR issues
401 .030 over
10.17:1 compression ratio New TRW pistons
Edelbrock Performer Aluminium Heads
Edelbrock EFI
Lifter valley oil by pass
Bulltear timing cover
.010/.010 crank/rods
Balanced and blue printed
For cam choice: Originally i ran the .479/.479 222/222 dur @ .050 292/292 adv dur 114 lobe seperation idle- 4500/5000rpm
power was so so. great for on the trail idled down to 400 rpm no problems idled at 750 pretty easily acted like a stock cam.
I have since had to fix a few things ahm machine shop (no names or slamming YET) that machined cylinder bores too tight for forged pistons.
The cam that i installed this time was a custom jobber ground bny Crower based off of some bench flow numbers for my heads and all the other specs that are involved with tuning a cam. Sometimes i forget how much these 401s love the .500 lift ballpark
.510/.510 226/226 dur @ .050 274/274 adv dur 112 lobe seperation
Idles at 750 with almost no lumpity lump at 600-650 she lopes just a little. has a very pleasent camd tone to the engine but not roudy by any means idles on the trail right down to 400 rpm though about 500 rpm and down she loads up just a hair. i have the ide set at 750 and in low range and in 1st gear no problems all the way through fordyce and rubicon. she will happily spin right to 6000 rpm if i ask her to. pulls all the way, scarry pulls all the way. Definately great idle conditions for being a .510 lift. reminds me of the 8601 characteristics big enough to let the enigne actually breath and yet not giving you any bad idle issues surging ect and still lets you let the clutch out same as though you had a stock or RV cam in like the comp 270H and without touching the throttle she will move herself.. Vacume is great 15-16# at idle 18 on highway. pleanty on the trail to run the power brakes ect
So for all those who keep asking the question wht cam to run. here is another one to add to the list of good results especially with EFI. and the way this cam pulls i think something maybe a hair lower on the rpm curve but with the bigr lift numbers like this would be on the money for a tow rig with these heads ect.. compared to what everyone likes to recommend which is the .480 +/- lift generic rv cams that are out there.
:!:
I like it. FYI no detonation issues on good 91, mild pinging under load when i get crappy 91.
Dusty
