wrong spec submitted by MOPAR

[Ed Wright]

Could be the vendor (chances are MOPAR didn't actually make the valves.) missed the spec. Can't blame MOPAR. It's the builder.

[Andys dad]

I am glad MOPAR was willing to help all of the people out who really made the mistake and changed the TI sheet with NHRA

[Alan Roehrich]

It's too bad a "clerical error" got someone DQ'd.


The flip side is that I check all my parts against the blueprint guide from NHRA. Jimmy Bridges does my heads, and he checks everything he does, every chamber and every port, my heads have Jimmy's cc numbers all over them when I get them. I check the valves before I ever give them to Jimmy, and then he and Chris check them again. That's the great thing about having a guy like Jimmy do your stuff. Jimmy will tell you that "if you get torn down, I'll be there like Johnny on the Spot".

[Pvt Parts]

Originally Posted by Ed Wright

Could be the vendor (chances are MOPAR didn't actually make the valves.) missed the spec. Can't blame MOPAR. It's the builder.

As I understand this, we're talking about measuring the head of the valve. If so, I for one would like to see Mopar's Magical Mystery Technique for acquiring this measurement.

Sounds more like.... "put any size valve in it and we'll issue the paper work to cover your arse."

[NewHemi]

There were numerous tech spec errors on the first generation Drag Paks in 2009.

We kept waiting for next tech bulletin:
Titanium retains; not allowed.
Piston dome height; wrong
Rocker arm ratio: wrong
etc.
etc.

But we knew what the specs read.

And where necessary, we got parts like the piston, that matched the specs. And since in the case of rocker arms, there weren't even any after market parts even being made. So stock factory rockers were all that we could run. And we just ran them and hoped.

Finally all of the spec wrinkles on the 2009 were ironed out.

But, as hard as the guys at the Drag Pak project at Mopar worked, there aren't enough of them, nor is this their only project.

I am not offering any kind of excuse for their oversight on the spec. It shouldn't have happened, but I can see how it did.

David
The New Hemi Guy

[Pvt Parts]

Originally Posted by NewHemi

There were numerous tech spec errors on the first generation Drag Paks in 2009.

We kept waiting for next tech bulletin:
Titanium retains; not allowed.
Piston dome height; wrong
Rocker arm ration: wrong
etc.
etc.

But we knew what the specs read.

And where necessary, we got parts like the piston, that matched the specs. And since in the case of rocker arms, there weren't even any after market parts even being made. So stock factory rockers were all that we could run. And we just ran them and hoped.

Finally all of the spec wrinkles on the 2009 were ironed out.

But, as hard as the guys at the Drag Pak project at Mopar worked, there aren't enough of them, nor is this their only project.

I am not offering any kind of excuse for their oversight on the spec. It shouldn't have happened, but I can see how it did.

David
The New Hemi Guy

Hey all those things are understandable but the bottom line is that this is NHRA drag racing, not Mopar factory racing and if the parts don't meet the NHRA specs, they are not legal.

[Irv Johns]

Originally Posted by Pvt Parts

Hey all those things are understandable but the bottom line is that this is NHRA drag racing, not Mopar factory racing and if the parts don't meet the NHRA specs, they are not legal.

In my case there were no piston specs for the 392 till March of this year. My engine was built with Diamond pistons as per NHRA specified with NHRA Logo and Diamond pistons engraved on top (early Drag Pak pistons had no engraving on top that was added after the first ones went thru teardown). There was no part number or ring spec in book til this March. My engine builder only had what was available for specs last June when my engine was built. He trusted Diamond to build pistons per NHRA as they were a approved vendor.

[Alan Roehrich]

Originally Posted by Irv Johns

In my case there were no piston specs for the 392 till March of this year. My engine was built with Diamond pistons as per NHRA specified with NHRA Logo and Diamond pistons engraved on top (early Drag Pak pistons had no engraving on top that was added after the first ones went thru teardown). There was no part number or ring spec in book til this March. My engine builder only had what was available for specs last June when my engine was built. He trusted Diamond to build pistons per NHRA as they were a approved vendor.

Irv, are you saying NHRA allowed you to race a car with an engine that did not have clearly defined specifications in the blueprint guide?

How did they expect to properly inspect an engine at tear down if there was no published specification, or even an accepted part number?

The blame for that lays solely at the feet of NHRA.

[Andys dad]

Not unusual for the newest cars

Our V10 was the same deal - that is why I dislike someone accusing the engine builder of being stupid or us not doing what we should have

The engine builders did the best they could and so did we

BTW so did the factories and NHRA

Now all of the jealous haters can jump on that but I will say "Elvis has left the building" - LMFAO

[Irv Johns]

[QUOTE=Alan Roehrich;324543]Irv, are you saying NHRA allowed you to race a car with an engine that did not have clearly defined specifications in the blueprint guide?

How did they expect to properly inspect an engine at tear down if there was no published specification, or even an accepted part number?

The blame for that lays solely at the feet of NHRA.[/QUOTE

Not exactly , we didn't find that out till today there were no specs on Diamond pistons in the 392 until March
all the other specs were posted,
ie: bore, stroke , valve size, cam, deck, head gasket thickness, throttle body size.rockers .