so the 503 is to much for just a stock head car with lifters rockers pushrods and springs

 

Actually, yes, $100. And he's been porting heads for decades. He ported heads for both my father's alcohol-injected big block dragsters. Fastest in his class.

Just because nobody does a decent job for cheap near you...doesn't mean old guys don't do a good job elsewhere.

 

I second this. Theres this old bugger here in town who can tune a holly 4 barrel double pump by ear, ports stock-> drag car heads, and doesnt charge 1000 bucks to have them run through a machine and tell you they flow this much, cuz they put a set through the same machine and they flowed said ammount. He did a set of LT1 heads for a guy around here for 400 bucks, and they flowed in the 275/280 intake range. Everyone on forums is some kinda fanboy. Everyone will scream AI or LE, and wont even have the product they push on their car.

 

so the 503 is a good cam to run on stock heads?

 

I don't even know what to say. I guess I wasted my $2500 on AI heads.

*sad face*

 

just intake, midlength headers, slp loudmouth, 1.6 rockers, 10308-1 crane spring kit more or less

 

yes perfect for stock untouched heads just change the springs.

 

ok what about this cam
TPiS ZZ409 226/226, .525/.525, 112 LSA good cam?? i am leaning on the 503 but i coul dget that one for 125 shipped to me

hwo much does a new 503 go for and were can i order it thanks guys

 

heres the video of the tpis
http://www.youtube.com/watch?v=pJeS1...ayer_embedded#

 

from what I've seen LT1s don't respond as well to single pattern cams as dual pattern cams

don't pick a cam based on its idle clip you found on youtube, look for people with real results and experience

 

food for thought, 230/238 on stock heads:

 

That AI cam was on a rebuilt motor with bumped compression.... Don't expect that tq curve on a stock long block...

 

yea he said 11.1 compression. is that a good streetable compression? all he did was change head gaskets

 

no big deal, when your doing the cam its not much more work or money to swap the HG's and obtain 11:1
yes, its the dcr that matters. roughly estimating here.. I run .029 gaskets(11:1scr) and the heads have been milled .010 so my scr should be somewhere around 11.2/11.3 but my dcr is around ~10.2:1

 

Running race gas, are ya?

 

Tell us the #'s when you get it dyno'd if you hit 420whp, every lt1 owner in 2000 miles will flock like ducks.

That is some high DCR for a street car, what octane do you run?

 

no need. If that seems high(tho I've some where read 93 can handle 11.25dcr?) then maybe I calculated incorrectly. regardless 11:1 is AI's(and LE on his cams) recommend scr and being milled .010 is only another **** hair of static compression. cam in sig int closes @ 42.7ABDC(@.050) and I'm @ sea level if u want to calculate

 

I think you have all kinds of stuff mixed up, but I failed math, what do I know.

 

eyeahh math wasn't my strong subject either lol
if anyone else wants to take a stab @ calculating my dcr all the other variables (#of cylinders(obviously), stroke, bore, cr length, & boost(0)) are all stock

 

You do not have 10+ DER