So much for killer heads: JPR S2 flow numbers
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From: SC
So much for killer heads: JPR S2 flow numbers Well, not only did I get screwed with shi*tty engine assembly twice, once with JPR and then JD "performace" after that, paid for two motors and got nothing out of it but poorly asembled junk, but my supposedly killer heads that were supposed to flow 317cfm at 600 lift actually flow as follows:
lift int. ex.
200 127 103
300 185 138
350 212 153
400 233 168
450 250 180
500 267 191
550 280 201
600 289 208
Somehow they made good power though, Im going to to try and get the CR figured out. How could I have made 475+rwhp with these?
if anyone wants some stage I ish heads, ill cut you a killer deal! they were fixed up and are like brand new now.
So anyhow, my list of parts that didnt quite work out right and were replaced:
2 built motor failures
4 camshafts, going on the 5th
3 sets of ported cylender heads, possibly going onto the 4th
3 different sets of headers, and I dont really have the headers on that I wanted
3 or 4 sets of tires and rims for the track
2 airbox lids, 2 different exhausts
5 different shifters and/or shifter configurations
3 transmission failures, 3rd one is getting worked with this engine failure
2 rebuilt or failed clutches
and thats only part of the list...
lift int. ex.
200 127 103
300 185 138
350 212 153
400 233 168
450 250 180
500 267 191
550 280 201
600 289 208
Somehow they made good power though, Im going to to try and get the CR figured out. How could I have made 475+rwhp with these?
if anyone wants some stage I ish heads, ill cut you a killer deal! they were fixed up and are like brand new now.
So anyhow, my list of parts that didnt quite work out right and were replaced:
2 built motor failures
4 camshafts, going on the 5th
3 sets of ported cylender heads, possibly going onto the 4th
3 different sets of headers, and I dont really have the headers on that I wanted
3 or 4 sets of tires and rims for the track
2 airbox lids, 2 different exhausts
5 different shifters and/or shifter configurations
3 transmission failures, 3rd one is getting worked with this engine failure
2 rebuilt or failed clutches
and thats only part of the list...
Originally Posted by 94form2000z
Wow SUX2BU. Glad mine worked out well the first time.
Last October I dynoed 400HP , 393 ft/lbs torque. 45 degrees out. Huntingdon Valley, PA.
June I dynoed 380HP, 360 ft/lbs torque. 90 degrees out. Columbus , OH.
Anyway, I'm not impressed yet; this is with a TR224 cam.
Funny about different dynoes and weather no?
Sorry to hear ezss. Good luck.
Last edited by Viper; Aug 19, 2004 at 04:06 PM.
I know why JPR's heads didnt flow,it seems his bench was about 30CFM off from the newer SF bench's out now.Joe shouldve recalibrated his bench instead of holding valves in his hand and saying this is .100 and this is .200.He shouldve bought the components to flow the heads at 100 to 600 correctly..
I also know that a sponsor flowed one of Joe's ports independantly that Joe actually took the time to port and his opinion of them were that they were thr 2nd best flowing port he has had on his bench.This shows JPR couldve had a thriving business but instead he dropped the ball and caused himself alot of problems.
EZ,I know Joe kept his runners small and I also know 280CFM will make alot of power with the proper cam and thats why your car put the power down that it did.Sorry to here about the mess.
I also know that a sponsor flowed one of Joe's ports independantly that Joe actually took the time to port and his opinion of them were that they were thr 2nd best flowing port he has had on his bench.This shows JPR couldve had a thriving business but instead he dropped the ball and caused himself alot of problems.
EZ,I know Joe kept his runners small and I also know 280CFM will make alot of power with the proper cam and thats why your car put the power down that it did.Sorry to here about the mess.
Originally Posted by JS
I also know that a sponsor flowed one of Joe's ports independantly that Joe actually took the time to port and his opinion of them were that they were thr 2nd best flowing port he has had on his bench.This shows JPR couldve had a thriving business but instead he dropped the ball and caused himself alot of problems.
Thread Starter
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From: SC
Originally Posted by JS
I know why JPR's heads didnt flow,it seems his bench was about 30CFM off from the newer SF bench's out now.Joe shouldve recalibrated his bench instead of holding valves in his hand and saying this is .100 and this is .200.He shouldve bought the components to flow the heads at 100 to 600 correctly..
I also know that a sponsor flowed one of Joe's ports independantly that Joe actually took the time to port and his opinion of them were that they were thr 2nd best flowing port he has had on his bench.This shows JPR couldve had a thriving business but instead he dropped the ball and caused himself alot of problems.
EZ,I know Joe kept his runners small and I also know 280CFM will make alot of power with the proper cam and thats why your car put the power down that it did.Sorry to here about the mess.
I also know that a sponsor flowed one of Joe's ports independantly that Joe actually took the time to port and his opinion of them were that they were thr 2nd best flowing port he has had on his bench.This shows JPR couldve had a thriving business but instead he dropped the ball and caused himself alot of problems.
EZ,I know Joe kept his runners small and I also know 280CFM will make alot of power with the proper cam and thats why your car put the power down that it did.Sorry to here about the mess.
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From: SC
Originally Posted by Viper
Just broke an ISKY 295D on my JPR head last Thursday. I plan on pulling the heads and getting them checked out. 11K miles; I'm not complaining in the thread, I should have checked them earlier.
Last October I dynoed 400HP , 393 ft/lbs torque. 45 degrees out. Huntingdon Valley, PA.
June I dynoed 380HP, 360 ft/lbs torque. 90 degrees out. Columbus , OH.
Anyway, I'm not impressed yet; this is with a TR224 cam.
Funny about different dynoes and weather no?
Sorry to hear ezss. Good luck.
Last October I dynoed 400HP , 393 ft/lbs torque. 45 degrees out. Huntingdon Valley, PA.
June I dynoed 380HP, 360 ft/lbs torque. 90 degrees out. Columbus , OH.
Anyway, I'm not impressed yet; this is with a TR224 cam.
Funny about different dynoes and weather no?
Sorry to hear ezss. Good luck.
sorry to hear about the spring. 380rwhp really sucks though for h/c, now at least you know whats going on.
I was not there for the last set of dynoes, so I dont know if they may have pulled the belt, etc... to get the numbers. wouldnt surprise me.
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From: SC
Originally Posted by 11 Bravo
Probably that same sponsor told me the same thing. That's why I was patient way longer than I should have been hoping he would do the right thing and send me the 6.0l heads that he swore he had for me, along with the rods, bearings, cam, rockers, pushrods, lifters, timing chain, oil pump, ect. He boned me for over $5000 worth of parts. A true American.
Originally Posted by ezss
Your situation sucks, im amazed you hung in there as long as you did. And you still dont have everything, correct?
Man, now that my spring broke, and I'm taking off the heads anyway, perhaps I'll get the whole motor checked out. JPR built it, all new parts except crank and rods.
11 Bravo, sorry to hear of your woes too, I thought it was close to a year ago you started waiting for the engine. I waited 8 months for mine to get done.
11 Bravo, sorry to hear of your woes too, I thought it was close to a year ago you started waiting for the engine. I waited 8 months for mine to get done.
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From: SC
Originally Posted by Fireball
Interesting...my GTPs flowed on JPRs bench what most everyone else's bench flows them at
So hows the rebuild coming
So hows the rebuild coming
my heads that I had bought from Joe well over 2 years ago were flowed on a newer superflow 600. mine read around 10-12 cfm lower then he said. After I had Jay from Absolute put new valves, springs and do a lil seat work and blending they flowed around 300cfm. Joes calibration must have gotten messed up sometime between then and now. JS, ws6transamgirl and I had good heads back then.
ezss, I applaude you for keeping interest in your car and not selling it or burning it. I hope you get it running the way you want it soon. Good Luck.
ezss, I applaude you for keeping interest in your car and not selling it or burning it. I hope you get it running the way you want it soon. Good Luck.
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Originally Posted by mike m
my heads that I had bought from Joe well over 2 years ago were flowed on a newer superflow 600. mine read around 10-12 cfm lower then he said. After I had Jay from Absolute put new valves, springs and do a lil seat work and blending they flowed around 300cfm. Joes calibration must have gotten messed up sometime between then and now. JS, ws6transamgirl and I had good heads back then.
ezss, I applaude you for keeping interest in your car and not selling it or burning it. I hope you get it running the way you want it soon. Good Luck.
ezss, I applaude you for keeping interest in your car and not selling it or burning it. I hope you get it running the way you want it soon. Good Luck.
that seems like a plausible explanation about his bench.
I have wavered a great deal on what I want to do with the car, so it hasnt been like Im blindly just accepting and willingly doing what needs to be done to make it run the way I want, but for the momment I really want to see it through.
Originally Posted by ezss
So anyhow, my list of parts that didnt quite work out right and were replaced:
2 built motor failures
4 camshafts, going on the 5th
3 sets of ported cylender heads, possibly going onto the 4th
3 different sets of headers, and I dont really have the headers on that I wanted
3 or 4 sets of tires and rims for the track
2 airbox lids, 2 different exhausts
5 different shifters and/or shifter configurations
3 transmission failures, 3rd one is getting worked with this engine failure
2 rebuilt or failed clutches
and thats only part of the list...
2 built motor failures
4 camshafts, going on the 5th
3 sets of ported cylender heads, possibly going onto the 4th
3 different sets of headers, and I dont really have the headers on that I wanted
3 or 4 sets of tires and rims for the track
2 airbox lids, 2 different exhausts
5 different shifters and/or shifter configurations
3 transmission failures, 3rd one is getting worked with this engine failure
2 rebuilt or failed clutches
and thats only part of the list...
Shortblock bad at 25,000 miles
5 cams 6th going in
3rd set of heads
2nd set of headers (TTS to Kooks, I like the Kooks)
car not running enough to wear tires down lol.
second airlid here also
3rd Throttle body
4th clutch (stock and 2 Rams that went bad) sponsor sent me wrong hydraulics) now have spec 3
3rd rear suspension setup.
had lifters fail 3 times
3 sets of rotors and pads that all warper (use cheapos now and just replace them)
3rd Oil pump
Dont you love this hobby
