Hey Guys and Girls,

Before sending my head to PortFlow I called then to discuss my setup. I told them the lift and duration of my cams, the compression I was running, and my other mods.

I've been told by numerous people that all the above was very important information. It gives the porter a sort of guideline when performing the work. Portflow told me they didn't need to know any of that and that all their p&p jobs were the same. For $1,000 I want to make sure I get the right job done.

Does this sound wrong to anyone?

 

I believe that Portflow takes the head to the highest amount of airflow possible. I.e. doesn't matter what cams you use since they have it flowing max air. The only reason I see explaining the cam lift and compression is if you wanted to mill the head.

 

dont worry portflow knows what they are doing, portflow has been around and been supplying built heads to fast street cars since way back when....

 

send it to ENDYN; they know that the cams do matter; so does the gearing, wheel and tire size, application (drag, roadracing, etc.), pistons, compression, rod:stroke ratio, valves, intake, tb, header, exhaust, vehicle weight, etc.. for $1K don't trust anyone who offers 'off the shelf' porting and polishing. check out ENDYN's site http://www.theoldone.com .

 

Someone bought into ENDYN's BS.

 

Thanks Guys,

With the exception of slofu, all of you had the same answer. I can see why cam ramp rate and compression would only be important in the event that I was milling the head due to compression obviously and piston to valve clearance issues. Thanks guys.

The head will be back in my hands in about two weeks! I'm pumped!

 

Just one question, did you dyno before you sent it off?????

 

No, I didn't dyno before I sent it. It would have been interesting to see what kind of gains I'm getting from the just p&p. However, PortFlow is replacing the stock valvetrain with all skunk2 components (Valves, Springs, Retainers). so it would be difficult to get the exact HP increase of just the p&p since the new valvetrain will already be intact when I get the head because the valves are high comp. Also, in addition to the valvetrain I'm dropping in the following stuff...

new cams, gears
intake mani
ITR AEM intake
70mm overbore TB
P28 ECU with harness
Apex'i VAFC.

 

Man, you are gonna have some fun aren't ya......adding a hell of alot of power all at once!!!!

 

Yeap, I hope I can tune her half way decent. The thing that really concerns me is wether or not the Theft Immobilizer is controled by the ECU. If that's the case I'll lose that with the P28 and that's gonna suck.

 

Might be a question for a new thread..........

 

The Immobilizer is indeed controlled by the ECU. Also, you might want to look into using a P72 instead of the P28, so you can retain the use of the knock sensor.

 

I was thinking of using a P72 but they are so dam expensive and hard to come by. I'm not really concerned with the knock sensor. A properly tuned engine shouldn't knock anyways. Can you offer some sort of proof that the immobilizer system is controled by the ECU? I may have to look at another route if it is because I really don't want to lose that.

 

I thought the cams were part of the info needed to properly port a head. I vaguely remember in a article about Portflow and from talking to Tom that he likes to know all of the variables so he optimize the head.
IntraGSR2000, have you spoken directly with Tom?

 

Salami,

I spoke directly with Tom Fujita at PortFlow. He was the person that said is doesn't matter about the cams.

 

I think that it didn't matter because they are completly rebuilding the head. If you had the valves and springs and all of that stuff already he would have asked for specs.