JPR Heads?

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Mar 21, 2014 | 07:48 PM

truggiero19

Thread Starter

Racer

Joined: Oct 2012

Posts: 348

Likes: 28

From: Houston TX

JPR Heads?

I recently got a set of ported LT1 heads and was told they are Lloyd Elliot Stage 2 heads, however; after talking to lloyd on the phone I could not find any of the makings that he puts on the heads showing that they were his work. The only markings I can find on the heads which do not appear to be placed there by GM are the letters "JPR" engraved on them. I have been trying to find some information about JPR; however, I cannot find any information about them. I have found several posts mentioning that they exist but no real information about them.

They have 1.6in Exhaust valves and 2.025in Intake valves and very beefy springs.

Does anyone have any information with JPR ported LT1 heads or know anything about them?

Thank you for your help.

Mar 22, 2014 | 12:06 AM

Matatk

Drifting

Joined: May 2007

Posts: 1,440

Likes: 19

From: SW Chicago Burbs IL

Sounds like Joe Prince Racing / no longer in "business"

http://ls1tech.com/forums/ls1tech-sp...statement.html

Mar 22, 2014 | 03:28 AM

truggiero19

Thread Starter

Racer

Joined: Oct 2012

Posts: 348

Likes: 28

From: Houston TX

Thanks for the info. The stories in that link make me quite nervous now though

Mar 22, 2014 | 07:09 AM

Matatk

Drifting

Joined: May 2007

Posts: 1,440

Likes: 19

From: SW Chicago Burbs IL

I certainly wouldn't run them on my car without having them independently flowed/tested/inspected first. I guess he was good early on, then fell apart.

Mar 22, 2014 | 11:10 AM

truggiero19

Thread Starter

Racer

Joined: Oct 2012

Posts: 348

Likes: 28

From: Houston TX

I already installed them along with a new cam last week. I never had them flow tested but I had them inspected by an engine builder and a different head porter and both thought they were very well ported. I do believe it is a quite old set of heads, and the motor they were on before I bought them was a 500hp 396. So in theory they should be quite good.

Mar 22, 2014 | 11:11 AM

truggiero19

Thread Starter

Racer

Joined: Oct 2012

Posts: 348

Likes: 28

From: Houston TX

I guess we will find out when I get on the dyno in a week or two.

Mar 22, 2014 | 05:14 PM

STL94LT1

Race Director

Joined: Jan 2002

Posts: 12,263

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From: O'Fallon Missouri

Let us know the results of the dyno.

Mar 22, 2014 | 05:30 PM

truggiero19

Thread Starter

Racer

Joined: Oct 2012

Posts: 348

Likes: 28

From: Houston TX

I will definitely post them up. Probably in a new thread though. I expect the numbers to be a little low because I'm still running the stock exhaust manifolds. Didn't have the $$ for the American Racing Long tubes yet.