My JPR HVLD Head flow numbers
After I got my heads from JPR I had them flowed because I could barely tell they had been ported at all. Flowed 248 @ .550 lift then began to decrease. Just had them flow tested after Scott's "cleanup" 285 @ .600 lift. Perhaps I exaggerrated a bit, but I think it just goes to show what little I got for $$$ (from JPR)
I don't know anything about Joe.... but I do know this. The heads that came into my Shop from Jim which he claimed Joe ported.... were a JOKE! The ports were inconsistent, the short turn sucked (biggest reason they didn't flow for ****), the rocker boss was still there, blend job was inconsistent.... but what bugged me worst.... you could still see grind marks all over the ports. Nobody took the time to sand them.
I did the best I could with what I know to fix them.... but you can only do so much and when the short side is already layed back... well it doesn't leave you alot of room to shape the port like you want.
I would rather have run stock heads than what showed up in the shop. But after working them over, they're not too bad.
Jantzer98SS is talking about the other Jim BTW. I was talking to him via e-mail and he told me he was sending them out. I am glad you were able to work with them.
An update on me:
https://ls1tech.com/forums/showthrea...72#post1352172
An update on me:
https://ls1tech.com/forums/showthrea...72#post1352172
Question for you guys with JPR heads. Did you all get a flowsheet with the numbers that were claimed when you recived the heads? I understand that there are serial numbers or something on the sheet that will prove it it the heads you have (could be wrong). So I assume you didn't? I ask because my 6.0l heads are supposed to shipped from JP next week, and will have the flowchart. If the numbers on it are good, would it be a waste to have them flowed somewhere else? I just want to be on the safe side, regardless of who ported the heads. Thanks.
I am obviously very hesitant to post in defense of someone I don't really know, but I am only going to say one thing. Joe brought a set of his heads to my shop with one intake port finished all the way out. It flowed 317 @ .600", to put this into perspective, we have never seen any other shops head flow over 300 cfm, for example LPE 268 cfm, MMS 285 cfm, PP LS6 "style" 299 cfm. I am sure Joe has made many mistakes, but one thing is for sure, he does know how to port LSx heads.
11 Bravo, I will flow your heads if you want, at no cost.
11 Bravo, I will flow your heads if you want, at no cost.
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Launching!
Joined: Jan 2004
Posts: 262
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Brian,
That is a great offer and very gentlemanly of you.
I too think that Joe can port heads, he just has to have his head clear of other distractions. That is why I though when he got to JD's it would work out great, but there was so much baggage that the JPR name brought into that venture that it was doomed to start with and then the downhill slide began.
That is a great offer and very gentlemanly of you.
I too think that Joe can port heads, he just has to have his head clear of other distractions. That is why I though when he got to JD's it would work out great, but there was so much baggage that the JPR name brought into that venture that it was doomed to start with and then the downhill slide began.
Brian,Its me JS...
U know AtoZ Performance,we bought your S3 LT1 heads off u a few weeks back.
And some Jesels a while ago too
Brain Tooley I know Joe can port too when he has his mind clear
But just like I told JD------>BE CAREFUL.
U know AtoZ Performance,we bought your S3 LT1 heads off u a few weeks back.
And some Jesels a while ago too
Brain Tooley I know Joe can port too when he has his mind clear
But just like I told JD------>BE CAREFUL.
Damn, Brian, that is seriously cool. I'll take you up on that when they come in. That way, they will be in the hands of someone who can work them if they don't flow well. As said above, I know JP can port some great heads. Though he is having some problem right now (hope it gets fixed), look at the numbers Bears 427 pulled just early this year. Those had to have been some good flowing heads. If everyones were like that, and had no other problems, Joe would be pulling in some cash. Crossing fingers.
Originally Posted by Brian Tooley
Joe brought a set of his heads to my shop with one intake port finished all the way out.
Capability means nothing if the shop your car is at is rushing to get you out the door to do more crappy work on the next car. I have seen this from more places than JPR and I am getting tired of paying for OTHER peoples mistakes.
Yea Bears car did lay down a great number,For about 2 weeks
Then is spewed coolant like a stuck pig.
Consistancy is whats important..
Not one runner after the fact,if he wouldve taken this type of approach with all his customers he wouldve been rich.My car was proof af that,How many S1/TR224 cammed setup do u know that ran 11.30@118 at 3460lbs
Then is spewed coolant like a stuck pig.
Consistancy is whats important..
Not one runner after the fact,if he wouldve taken this type of approach with all his customers he wouldve been rich.My car was proof af that,How many S1/TR224 cammed setup do u know that ran 11.30@118 at 3460lbs
Last edited by JS; May 13, 2004 at 11:37 AM.
Originally Posted by 11 Bravo
Question for you guys with JPR heads. Did you all get a flowsheet with the numbers that were claimed when you recived the heads? I understand that there are serial numbers or something on the sheet that will prove it it the heads you have (could be wrong). So I assume you didn't? I ask because my 6.0l heads are supposed to shipped from JP next week, and will have the flowchart. If the numbers on it are good, would it be a waste to have them flowed somewhere else? I just want to be on the safe side, regardless of who ported the heads. Thanks.
I didn't get any flow sheets with my JPR S2 HVLD heads. IMO, consistency is just as important, if not MORE important, than ability when porting heads. ALL the ports need to flow well, not just one of them.
