Pure Stock Drag Racing tips & tricks

[COPO PETE]

Pure stock Deuce might be afraid, but not no Canadian COPO [img]/ubbthreads/images/icons/tongue.gif[/img] Casey....never kick a sleeping dog!
Peter

[Casey Marks]

Peter - HUSH !!!!

I'm trying to get Marlin to bring out some of his iron. < Even tho it is Gobi Beige ...... > [img]/ubbthreads/images/icons/wink.gif[/img]

[YENKO DEUCE REGISTRY]

Hey now! I would never pick on the sissy cars!

I will call the Grove to see what their rules are, still planning on making a spring time run - regardless of Casey's thoughts [img]/ubbthreads/images/icons/grin.gif[/img]

[YENKO DEUCE REGISTRY]

Somebody explain the mechanics of wheel-hop, primarilary the pinion gear riding up on the ring gear. pxtx explained it to me in an email, seems logical, but how do spring clamps prevent wheel-hop and thereby increase traction. Will the spring clamps make the car rise rather than squat?

Sam,
Can't be making my car into a day 2 car! I would like to make it to the pure stock events in OH or MI one of these years.
Still learning,
Thx

[Casey Marks]

Marlin,

With these tires, the trick is to not blow them away coming out hard.

For example: With my W-31, I have a $53 reman'd Dynamic converter that seems like it is about 15" in dia. It lugs the motor enough from a "dig" that it allows the tires enough time to bite before the motor "comes on". I also run a LOT of advance in the distributor. Basically - off-idle, it is at full advance, which also helps the low end.

OK - THAT's it from the Olds Corner !!!!! [img]/ubbthreads/images/icons/grin.gif[/img]

Marlin's a scardey-cat to race his Deuce ......

Hey Marlin - My W-31 went MID-15's it's first year out. Don't worry 'bout it dooood.

Marlin's still afraid an Olds may beat his lil'ole Nova .... [img]/ubbthreads/images/icons/smirk.gif[/img] [img]/ubbthreads/images/icons/smirk.gif[/img]

[YENKO DEUCE REGISTRY]

Hmmmmmm [img]/ubbthreads/images/icons/grin.gif[/img]

So, what tire pressure do you start with in the rear's and front's? I thought the rears got 15-18, and the fronts got 40 psi??

What about a blocked power valve in the secondary of the Holley's? Is that as beneficial as I'm being told? Before I had my Holley 'concoursed', I had a block in the sec's, and the car would really come-on at about 2500 rpm - but I couldn't keep the tires under it. I later read in the Holley book that this scenario is caused by a lag in the fuel delivery, and although it feels cool, it's not the best way to set up the carb. So, I've not re-installed the block, it's not breaking the tires loose, but it takes longer to get the same seat-of-the-pants power.

I won't know what this thing will do for sure until Spring, then I will have a chance to take it out and test a few things. Even if I don't make it to one of the Pure Stock events, I'll get it to my local track.

So, Casey, I just might pull up next to you in the other lane one of these years [img]/ubbthreads/images/icons/grin.gif[/img]

[Chevy454]

You shouldn't have any trouble hazing the tires, so I advise AGAINST running that low of pressure in your rear tires! I would hate to see you put that thing in the ditch this early into it's restored life!

I think the general rule of thumb (on repro bias-plys) is to start around 40 and work up. Our Camaro runs 46psi on all 4 corners, but this is dependant on the car/tires...but it should get you in the neighborhood. Lay a set of black marks and make sure they are each nice and evenly dark all the way across. Adjust the pressure according to what you find.

My first year I tried lowering the rears to ~20psi...I almost took out the Christmas tree and both guardrails[img]/ubbthreads/images/icons/crazy.gif[/img]!

[RonNova396L34]

Marlin,
I remember a friend who owned a Belvedere(sp) Mopar ran a low air pressure like that in his rear tires with the same almost devastating results! He said it was quite the scary ride down the track. Next time I see my friend Steve (The guy I talked about in the NNN article) I'll ask him if he has any tips for you since he raced Novas for years. Even stuck a 427 in his 70 at one time.
Ron

[YENKO DEUCE REGISTRY]

I'm not sure that I understand how the lower rear tire pressure would cause the car to launch 'crooked'?? I thought the tire would 'flatten out' a little bit as it absorbed the initial 'shock' and thereby give a little better launch because you could hit the tires with a higher RPM?? Remember, this is completely new to me!