Here's my engine specs.

I do not know what specific springs are on the heads but they are made by K-Motion. The block is an LT4 with four bolt mains. The crank is 3.75 forged COLA that has been heat treatred and knife edged for reducing rotating weight. Canton oil pan for oil control. The rods are forged Manley H-beams. The pistons (4.060) were special ordered from JE are forged and designed for nitrous.

 

106 lob centers... and 310+ adv dur?? i personally think you will make no power until 3000+rpm and peak power around 7000+
but it will sound wicked...

keep in mind the gm pcm will not do over 7000RPM

 

7200 ?

 

Depends on your definition of "too" big. That is a big cam though. Just get a higher stall converter

 

I dont think K-800's are gonna even be close with that cam. Your going to need a k-1100 installed at 1.900 That should put you at about 230lbs on the seat and well over 500lbs open, and bee good for .700 lift.

Its a big cam for teh street but as already mentioned everone has their own preferance to "streetable"

Im building a 355 solid roller now and my cam specs out pretty close to yours. But its not going to be a daily driver by any means.

 

I had a STOCK stall on my first 383. Now I have a 2800 stall vigilante for the motor.

 

maybe - but none of the tables in the pcm go above 7000 - so how is the pcm going to know what to do w/ spark and a/f ratio?? my peak power is 6130 - 6600 (same RWHP thru that range) and i have over 520hp at the crank w/ 485 @ the wheels..

that cam this guy has is good for almost 800+hp w/ my setup.. but the pcm will not spin the engin above 7000 on the dyno

 

Yes you are right!

BTW Wow!! 485rwhp congrats.

 

the cam seperation is way too tight for vacume for brakes ect...it will bo so tight its goana cam hard, and i dont think 106 duration is good for n20

 

2800 is not enough for that cam believe me

BTW you say "on your first 383". What happened to your first 383 ?

 

Try 4000+ RPM stall.

My 3200 Vigilante is too small for my 23x/23x low 6xx" lift cam

 

In re tight LSA: It may not be good for boost, but I don't know about NOS---maybe with NOS, a tight separqation might mean that any of that juice that gets scavenged before the intake closes is bad for the cat or maybe screws up the 02s sensors and the resultant action by the PCM----sounds good to me.

 

106 lobe center... need 14:1 or higher static compression as your dynamic compression will be very low due to the large overlap

you will also blow 1/2 ur nitrous (or boost) out the exhaust valve - wasting power

NA this cam is good for well over 800HP if the head flow rates are matched to the cam and displacement of the engine

this is a VERY hight RPM cam as well

hmm - get a FAST pcm module and 14:1 or higher compression and see how you do on the dyno....i will bet 800+ hp w/ heads that will flow enough cfms

the LT4 intake is good for 850+HP, though you will need a new throtle body (bigger)

and this will NOT be a daily driver

 

thanks... all the power comes from the heads.... then displacement

 

i 2nd the 4000+ stall
that cam will not idle below 2800 rpm