Re: wrong spec submitted by MOPAR
 

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?

Re: wrong spec submitted by MOPAR
 

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

Re: wrong spec submitted by MOPAR
 

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

Re: wrong spec submitted by MOPAR
 

Thanks for the instruction

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

Its a beautiful thing

Ron

Re: wrong spec submitted by MOPAR
 

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.

Re: wrong spec submitted by MOPAR
 

Cool looking car !

20-30 years from now, it will still look cool.

Re: wrong spec submitted by MOPAR
 

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.

Re: wrong spec submitted by MOPAR
 

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

Re: wrong spec submitted by MOPAR
 

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

Re: wrong spec submitted by MOPAR
 

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".