Pure stock 340 Mopar
 

Just wondering if anyone is running the 340/275 (AVS) in Pure Stock? Some time ago I remember someone running a '71 Demon 340/275 (TQ) as a Pure Stocker, and would appreciate any info I can glean.

I may initially build my '69 Dart as a Pure Stocker to get my feet wet in our local Stock/Super Stock series, then work my way up ($$$$$) and build it as a traditional Stocker.

Re: Pure stock 340 Mopar
 

I have a '70 340 Dart Swinger that I run in Pure Stock. I can help out as much as possible, though my experience is limited. I didn't run last year, and only once the year before. limited time and resources lately. I just went through it last year so I hope to run a little more this year. I barely run the index, but I built everything myself.
PM me and we can talk.
Mike

I run D/PS, have run under 3914 and 5914

Re: Pure stock 340 Mopar
 

In pure stock, you must run manifolds and polyglas tires, no port work of any kind, 2 1/2 exhaust with H or X pipe

Tom cannon runs a 71 with that carb in pure stock

Re: Pure stock 340 Mopar
 

1971ls6: I believe you're referring to the "Pure Stock Musclecar Drags" series in which you must run manifolds and bias tires.

Mark: IHRA has a Pure Stock class that NHRA doesn't. Our local series runs under IHRA rules which open things up to more participation from 'different' classes. You can't use a 'stocker cam' as a traditional stocker can. But I've read here that you should have a cam ground which will check within the specs but should work better than a dead stock grind.

Can run headers with mufflers OR open manifolds.

You can check out the rule book at http://www.ihra.com/.

Thanks for the replies guys.

Re: Pure stock 340 Mopar
 

Correct on all the above. You can run 9 inch slicks at 29.5 diameter. The cam MUST check on OEM duration and over lap like in the Jr. stock days of pre 1972. The valve springs must check on OEM open and close pressure specs also.
Just pretend your racing back in 1971 Jr. stock days if your old enough to remember those days.

Re: Pure stock 340 Mopar
 

Is there a list of the current Pure Stock records?

Re: Pure stock 340 Mopar
 

Jerry Coblentz from eastern Ohio runs a Demo in C/PS, I believe it's the 340/275. I'm unsure of the IHRA rating, I think it's 310.

Re: Pure stock 340 Mopar
 

Mark, I already have a set of 1 3/4 non-step headers, will I be able to get away with using them with the X pipe and mufflers ??? I'm only 43 also !!!

Re: Pure stock 340 Mopar
 

Todd,
I have been running 1 3/4 headers on mine with flow master mufflers.
I don't have a cross over pipe. My thought was run the larger pipes since the muffler was required and will create some back pressure.
I haven't done any additional testing with smaller hearders or X pipe.

Mike

Re: Pure stock 340 Mopar
 

The worst part of this whole deal is that I just sold a set of Hooker 1 5/8" street & strip headers that I think may have worked with this combo. The main reason I'm wondering if the 1 3/4" will work is that I already have them, and will run them when I eventually build the car into a traditional stocker.
Like Mike, my thoughts were that I could get away with the larger pipes with the exhaust system creating at least some back pressure. Mark, I know you're the man for headers, so in all honesty, what kind of ET difference can I expect between the 1 5/8 and 1 3/4 pipes?
For our local series, I'd be really happy to be -.2 or .3.
I used to run my street/strip '69 Dart with a very mild 360, 904 with 3400 stall converter with 4.10s on 26" slicks. It went a best of 12.9 @ 105 (it was a street and strip car). The car had full exhaust including tailpipes and OLD Dynamax mufflers.