wrong spec submitted by MOPAR

[Greg Hill]

A professional stock eliminator engine builder would have measured the valve the right way and in Irvin's case with no number on top of the piston would have called California for clarification. You can't assume these motors are going to be right when you get them.

[art leong]

Originally Posted by Greg Hill

A professional stock eliminator engine builder would have measured the valve the right way and in Irvin's case with no number on top of the piston would have called California for clarification. You can't assume these motors are going to be right when you get them.

Gregg that was the same thing Curt Lashure told me a few years ago after I set a record at Atco. The piston dish was .375 off.
He explained that some aftermarket manufacturers would submit a piston and then build a different piston with the same numbers for a customer.
After listening to the stump speech for what seemed like an eternity. I explained (or tried to for about the 3rd time) that the pistons in question were not stocker pistons. But stock assembly line pistons, that came in ever 2.5 turbo mopar ever built (a couple of million).
When I explained that a .375 difference would make any diesel proud. He looked at me with a bewildered look.
The outcome was they let california make the call. I was not allowed to race that weekend and was never offered a refund. Even though I was totally legal (as per california).
Another go round was when they tossed me for having my pistons to far down the bore.
He told me it could be an advantage allowing more piston to valve. But then told me I could run any thickness head gasket.
I miss Gregg X's common sense.

[Ed Wright]

Originally Posted by Greg Hill

A professional stock eliminator engine builder would have measured the valve the right way and in Irvin's case with no number on top of the piston would have called California for clarification. You can't assume these motors are going to be right when you get them.

And Salty Dog said: Who are their engine builders?

That is who I would be blaming, not MOPAR. Who takes an OEM engine and just runs it? Do that and you deserve what you get. Ever hear of production tolerances? The "engine builder" had to have access to NHRA's specs. Why was everything not measured?

[Andys dad]

Originally Posted by Ed Wright

And Salty Dog said: Who are their engine builders?

That is who I would be blaming, not MOPAR. Who takes an OEM engine and just runs it? Do that and you deserve what you get. Ever hear of production tolerances? The "engine builder" had to have access to NHRA's specs. Why was everything not measured?

Now that was an unexpected response ED

You could hardly call these OEM motors - they are complete "race ready" spec motors from Arrow Racing and two of them had been through NHRA tear down before and passed

I know Arrow built these as good as any engine builder out there - they just did not know MOPAR made a mistake - they used the valve which was identifed to go in the heads - stock size for a Gen IV viper engine - The TI sheet was submitted to NHRA after the engine building started - the valves used were appearently incorrectly measured by MOPAR engineering - used a blue print to figure out how to do it - LMFAO

"this is not your father's Oldsmobile"


Ron

[Ed Wright]

What you do is measure everything against NHRA specs. That's what you go by.
If that is who built it, they should not have assumed. I would be concerned if I owned one.
I hope they don't charge much. LOL

[Andys dad]

Originally Posted by Ed Wright

What you do is measure everything against NHRA specs. That's what you go by.
If that is who built it, they should not have assumed. I would be concerned if I owned one.
I hope they don't charge much. LOL

Thanks for the instruction

No Problem - all MOPAR had to do was submit the corrected TI sheet

Its a beautiful thing

Ron

[Ed Wright]

Comes down to one thing: all the engine builder had to do was measure everything. That simple. That is who is at fault. If I couldn't do my own I would use a known builder of NHRA legal engines. Not some road racers.

[Greg Hill]

Originally Posted by Andys dad

Now that was an unexpected response ED

You could hardly call these OEM motors - they are complete "race ready" spec motors from Arrow Racing and two of them had been through NHRA tear down before and passed

I know Arrow built these as good as any engine builder out there - they just did not know MOPAR made a mistake - they used the valve which was identifed to go in the heads - stock size for a Gen IV viper engine - The TI sheet was submitted to NHRA after the engine building started - the valves used were appearently incorrectly measured by MOPAR engineering - used a blue print to figure out how to do it - LMFAO

"this is not your father's Oldsmobile"


Ron

You can't assume anything is right. You have to measure. Do you think that Arrow rolled the cam and checked every lobe to make sure the lift is right? I bet Don Little or Bruce Parsons or Bub Whitaker would have. Do you think they poured all the runners or every combustion chamber? Did they weigh a piston and rod assembly? All of us have to play by these rules. So Chrysler gets to change the spec after the fact. Why doesn't that surprise me.

[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