Yes it could, depending on the level of porting. If it's already CNC and "good" then it may take very little extra work to get it to work well.

Like I said before, I'd talk to the porter. He will know what head he wants to work with to arrive at a flow rate and cross section area best for the given application. That may be 195 to start and that may be a 210 to start... don't really know til you talk with them. Some like to do more work than others to get the port shape they like and may want to start smaller depending on the casting.

-Mindgame

 

A Bare AFR starts out smaller than 210cc, the bare casting is made for the final size to be anywhere from 180-227+cc so the port you get in the begining is pretty small.

With the 23 deg standard port castings out there you are probably going to get a 215-225cc port when you are done for a 383.

Bret

 

Just noticed something......

Schurter, Krause, Bauer.....

Guten tag die Herran!



-Mindgame

 

I think zeit auf ihren händen*!

(*someone has too much time on their hands)

Rich

 

It made 456rwhp on my 383 tune. I'm sure with a better tune up I might have hit 470ish. This was on a M6 running comp pro mags. The problem I was having which lead to the new top end was, I kept breaking rocker studs, and puch rods. Somthing wasn't right. Maybe too much valve train flex, or wrong pushrod length. The heads I'm running are AFR 210's.

I now run T&D shaft mounts, new intake, Fast, and a new Joe O special cam I am hoping with these changes I see well over 500rwhp.

 

When you were breaking studs, did you use any kind of stud/rocker support and what kind/size of studs are you using?

I'm curious because on my 383 w/ AFR220's, I am running 7/16" studs and Comp Pro Mag's and at the recommendation of my builder, using an AFR Stud girdle as well due to the high spring pressures and solid roller.

 

At that time I was running stock vavle covers so there was no support. I sure that's why I was having that problem. I was running the same setup as you(7/16" studs and Pro Mag's)

Neal

 

PNYKILR How much spring did you have open/closed...was this cam a street cam or race....

What valve covers do you have now....

 

I now have Canton Valve covers. I was running and still am Comp Cam Pacoly spring. The solid I was running was 250/256@.050 644/614 lift 112ls. I thought is was mild compared to what I have now 270ish@.050 670ish lift 108ls. This one is more suited for the single plain intake I'm running now.

Neal

 

Are the valve cover center bolt, did you drive that cam on the street..who was it...

 

LR-Is this THEORY or fact.Has it been measured and has it made HP or is it all on paper. I would like to see it measured on a dyno._VE measurement's won't tell you intake velocity .
_MG-Based on my calculations, my own combination should be in the .5-.55 range near peak torque. VE peak was 111.2% (measured) which isn't too bad considering this aint the best intake manifold in that regard.

_____________________________________
MG,
You can't figure MACH number's or intake velocity from VE.There is no earthly way.
You can tell if there is enough air and fuel going into the engine to make a given HP number and how efficent you are using the charge to make that HP number.But you can't tell the velocity.
If you have a formula for that I would like to have it and so would Harold Bettis at Superflow. Him or I,don't understand how that port velocity number was arrived at off of a 111.2%VE number.If you had a "P" tube in a intake port that would tell you the velocity,but no mention of that happening.

 

I can see it now... there are people on this board who will read those cam specs and instantly pee their pants, run screaming from the computer saying it's just not possible... then to top it off will ask about gas mileage or emissions compatability, LOL!
I'd love to hear that bad boy idle in person!
Steve...

 

Yeah, we of Germanic heritage often over-engineer stuff. My Polish side tempers that somewhat. Bret has more Polish and less German than I, however.

Bonus: name two high-end Polish Vodkas. One is made from potatoes, the other from Polish rye.

(staying out of the feline fisticuffs for now)

 

Finally the voice of reason. I cannot believe the reaction most have on this topic. When I started talking cam specs only Jeff Creech had any encouraging words.

 

Sounds very similar to my buddys car. He has a 93 Formula, 383, and a Comp cam forget the duration, but lift was around 670/690 @.50 on a 108LS, a byproduct of this cam was it had the 4/7 swap. He's running a single plane victor jr & mighty demon 850. All I can say is the car runs like crazy, we have not had it to the track due to tweaking his converter. The idle is awesome and very streetable. The hardest part was being told "it can't be done" with the cam he ran. It's an oldschool cam in an LT1, so lot of enginuity went in making it work, custom bronze cam walking gear mounted to the vented timing cover, custom machine work on the OPTI mount, custom machine work on the cam end to accept the timing gear, etc etc. It was all worth it though.