Since I'm pulling the 440 out of the GTX this off-season,I'm seriously considering sending the Performer RPM's over to Dwayne to do a Stage II port and mill them to achieve a 11:1 compression. Current compression is 10:25. For anyone that's had this done...what is your combo,and how much difference did it make? More than a few knowledgable people have told me it would easily put me in the 10.80-10.90 range. My current BEST is a 11.19 @ 120mph. Heavy(3725 lbs. w/driver)and want to continue running pump swill! Thanks in advance for your info...and time! Randy B.

why dont you just ask Dwayne how much it would pick up?

FWIW, i think it would be money well spent

Ray...I just haven't got around to calling Dwayne yet! Just curious as to what others experienced! I'm sure it'll be money well spent!...Dwayne's the MAN!

Randy I cant answer your question but I can show you my EZ head Dwayne did some of his magic on. These flowed 329 @ .600 I believe and I know my car has much more in it then the 11.0's I went last time out with problems. These were just opened up a tad as he did not go all out on them. His work is fantastic and you cant ask to deal with a nicer person. I dont think you will regret having Dwayne work them for you. Do have any port work at all done on your heads now ? Ron

Thanks,Ron! Did these flow 329cfm AFTER Dwayne worked them? If so,what were they flowing BEFORE? I've talked to Dwayne on a few occasions,in fact I purchased my Comp SQ flat tappet cam from him...on his recommendation!...EXCELLENT choice! I picked up .3-.4 from my previous cam. My Eddy's are box stock,except for Isky 8005A springs,and Comp retainers. How do those Max Wedge port windows affect low-end torque on the street? Thanks! Randy

Randy, i'm pretty sue Dwayne is getting 310-315cfm on a std port e-head on his bench. You see how well Doug's flat tappet 451 is working with the stage 2 portwork


Ron

Dwayne is a great guy to deal with!!!
he did my std. port Bulldogs and got 308 cfm @ .550 lift out of them. You will be very happy, Just take his advice what ever it is. I know I should have let him open mine to max wedge size. Plus tell him you want to run a stock six pack intake , HE loves those

Box them up and send them to Dwayne. You will be glad you did. I imagine you might have to send him the intake to if you are going to have him mill the heads.

Mr. 6brl..I've had my go-round with 6-packs in the past!...think I'll stick with a single 4 bbl! Dwayne IS a GREAT guy to talk to!...he ACTUALLY listens when you talk! Like my good friend from Canada suggests...just look at Doc's dyno results,and how well his '65' runs, on Eddy's ported by Dwayne...as that old saying goes,"the proof is in the pudding"!

If it were mine I would send him the intake and heads and let him work it all over.

Dwayne is one of the most respected head Porters and engine builders on thsi site and one of a handful on here that I would never hesitate to recommend. When I recieved my Stage VI Chapman Max Wedge heads and wanted to know the "real skinny" on what I had I knew I could count on Dwayne to give me an Honest an objective technical evaluation, and he did.

Generally every 4 cfm of intake you gain throughout your cam/port flow window is worth 1 hp PER cylinder, provided your induction and exhaust system is capable of delivering the proportional increase in Air/fuel demand needed to achieve it. If I recall correctly the PRH Stage 2 on a BB Eddie should deliver at least 30-35 more CFM through the most critical mid-lift flows (where the valve spends 1/2 it's time), so in rough numbers that's about 65-70 more HP potential all else being equal.

The effect of a good port job is very similar to the difference in a flat tappet vs a roller of the same relative seat timing and lift...only more so. You are effectively allowing the motor to increase it's VE (torque and as a result HP and upper RPM breathing) but without negatively impacting the lower end of the powerband. It's a win-win and furthermore, Dwayne is one of hte best at tailoring the port work to the specific flow characteristics of the cam and the converter/gearing/vehicle weight of the rest of the combination.

bottom line...you can't go wrong with PRH

Indy. Check the sale section.

Streetwize,
I disagree with you that it doesn't affect the overall torque curve. When you open up the port size it does take some away from the lower curve.

Well I do agree that it can but it's not always the case; In this case (and I'm speaking mainly to 440 Mopar standard port window wedges) the motors are already relatively under-ported (cross sectional area to Swept Volume) so I have increased port volume substantially without any measureable impact on low end performance. If we were talking about a larger port motor (such as a Hemi or a 351 cleveland) what you state would certainly apply.

While it's true anytime you increase the port volume you can have a negative (slowing) effect on the port velocity, often times that can be offset by 'sharpening' the Valvejob (valve and seat angles)itself. Also there are cases where removing material/adding CC volume can actually enhance velocity at nearly EVERY measurement point inthe valve lift. Bowl blending (removing factory ridges) and 'boat tailing' the guide areas are examples of where it can often be a win-win.

good point, which deserves some further clarification.

Remi..are the deals from Indy directly? I've heard of WAY TOO MANY horror stories dealing with them! I believe Dwayne's a distributor for them,though. I'll see what he says!....Chad,I'm sure opening up the ports will take some velocity away..i.e TORQUE! But..maybe the milling will help to offset some of the torque loss. I'll have to discuss this with Dwayne,as well! All I know is if getting the heads ported,and raising the compression to what HE thinks will handle pump premium...results in CONSISTENT 10.9-11.0's....I'll be VERY HAPPY!

Nothing against Dwayne, but you are friends with Jeff and local to Modern Cylinder Head....why pay shipping to/from Vermont when you have such an awesome resource so close to you already?

Jeff's MCH CNC RPM heads are very effective.

I agree but is Jeff back at work, or is he still having treatment.
Mick

Brent..couldn't go wrong with either Dwayne,or Jeff! I know Jeff's had a rough go of it this past summer,and I'm sure he's back-logged with LOTS of work! I really didn't want to burden him with more. Before I decide ANYTHING..I will talk to both of them! Like I said...can't go wrong with either one!..they both do GREAT work..no one can argue with that fact!

Mick..last I heard,Jeff is back at it,but not putting in as many hours as he use to! Chemo and radiation therapy knock your energy level for a loop! Found that out in 2010,when I did chemo,from April to August. I was fortunate though,didn't get real nauseous,lose my hair..or my appetite...but my energy level was terrible! I know for a fact,Jeff's treatments were a lot more intense than mine! I just hope he makes a FULL RECOVERY! Jeff's a GREAT guy! Work..no matter who's it is,has to be secondary to his health!