Certified Stock "Qualifying Numbers"

Deep in the heart of Hillbilly land!

I don't live there, Randy, but close...my last 2 children were born at the hospital in Mtn. Home...located in the hills & curves of the Ozark mountains, on beautiful lake Norfork!

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Hillbilly Racing Team
War=Peace,Freedom=Slavery,Ignorance=Power

 

silly question

is gasket matching the intake to the heads allowed ? if so how deep into the port is allowed ?

 

No. Gasket matching of any type is not allowed in Certified Stock (or Pure Stock, for that matter.) :3gears:

 

you're kidding ??? you can blueprint the engine to NHRA spec but you can't makes the edges of the ports line up :Smarty:

:laugh: :laugh: :laugh:

 

That's correct.

 

so if i want to certify now i have to find yet another manifold :rant:

good thing i won't be fast enough to worry about such things :3gears:

 

Not sure where the confusion came from John ??? o No:

Gasket matching has never been allowed in Pure Stock. Do people do it ?? Yes, I'm sure that it happens. But in a Certified tear-down, it would definitely be found.

 

actually casey the confusion and subsequent grumblings is just me blowing off steam ou:

i ASSuMEd that since the engines were HARDLY STOCK , meaning that NHRA STOCK and WHAT ACTUALLY ROLLED OFF 99.9% of the ASSEMBLY LINES are NOT the same ( ok at least the cars that rolled out of CHRYSLER ), and that gasket matching was part of the process . i wonder if NHRA allows it ? i know porting is a no no , not that its not done and then the hidden :Brow: .

are the runners of the heads CC'd as part of the certifying process ? ou:

i haven't actually gasket matched my one good intake YET, but i did have it surfaced yesterday after discovering that the gasket surfaces were NOT flat when i was cleaning the overspray off them the other day . the thing was cupped and twisted in a couple different directions , which explains why the idle mixture screws had to be out 6 turns each to get the car to idle smoothly and the oil i found in the intake runners when i pulled the intake :spank:

 

Hardly Stock???

JohnRR
What the heck--I have been watching this and not liking where it's going!!!
- If you look at the numbers of them people who certified you will see the motors ARE NOT MAXED OUT!!! I know I am not even to the ADVERTISED numbers!!!!! I came up 11.19:1 compression Advertised is 11.25.
I could of gone to 12.85 doing NHRA. My heaDS could of been 106 cc
they where 110.. All most of us are doing is fixing problems like being .020 plus thou in the hole, blocks that are off square , valve heights all over the map, spring pressures that have been sitting since the 70's or 80's.

Certified program was invented to prove you were stock- NOT- so people COULD cheat by BOGUS compressions and light Rods and cranks and pistons. Stuff thats hidden!!! It's not an excuse to take a motor ridiculous morphed form!!!! Very few people in the program are maxed. I have 3/8 truck rods and a stock crank in my motor, will some of the new heavy hitters???

Hopfully people have heard of a BORE scope which they should use at certifing to see and look for bogus stuff in the lower end. If they Don't the whole idea of certifying will turn into FAST DRAGS all over again!!!!

My 2 cents - like or tough s**t

 

seems to me you are selectivly reading and possibly reading into it what you want ??? i edited my above post to HIGHLIGHT something you may have missed ?? :Comp:

since i have little experience with anything other than big block chrysler wedges , most of my finger pointing of CERTIFIED STOCK is aimed at those cars . maybe rightly so since it seems that the fastest cars are chryslers aren't they ? here's maybe a case where NHRA is actually allowing chrysler to CHEAT ??? :laugh:

as far as i'm concerned NHRA STOCK BLUEPRINT SPEC and what CHRYSLER ACTUALLY BUILT are NOT the same spec . and i have just one of the engines that can prove it . the spec for 1969 383 335hp engine , piston can be .021 above the deck . when you do the math the stock CH piston is at ZERO deck according to the CHRYSLER BLUEPRINT . the 906 cylinder head , i have no idea what chrysler blueprint is , but NHRA is 79.5cc for combustion chamber volume . i have yet to see a stock as removed off an untouched chrysler built 906 be LESS THAN 90cc . :spank:

how much compression is gained by removing .021 off the deck of the block and then about .050 off a head to get to 79.5cc ??? i don't have the formulas to figure it out .

within the next couple months i'll be pulling the heads off my 55k original mile 335hp 383 , i'll cc the chambers and measure piston to deck and i know they won't be ANYWHERE NEAR NHRA BLUEPRINT . but if they are i'll gladly post it and have egg on my face .


My 2 cents , and i don't care if anyone likes it or not ...

 

If you've got bone stock 906 head runner CC numbers, I'd like to see them.

 

Better yet ....

John,

Just run ONE, ONE, OnE, ONe, oNE, onE race, and then start with the Monday morning quarterback antics. You make it sound soooo difficult to run, when it really isn't. Bring your junk out and run it. Until then, don't worry about the correct ChryCo P/N embossed on the steel shim head gasket. I'll even go out on a limb and tell you to gasket match your 383. Do it !! You will do it, knowing that 40 other cars will be driving right on by you. It's kinda like headers ...... you don't have to do it to be fast ...... you just think you do. :grin: uzzled:

BlackGold: Do you need a room mate ? John and you could get a room together ..........

 

Well, the fastest chrysler product out their has it in a magizine that he is running a tight lash (rapid lift) cam. I can NOT speak for the owner but that is what the mag is claiming. The article is March 05 MuscleCar Enthusiast page 38-41. I know the quick Chevrolets that run near the top have yet to use the technology.

Don't let a few cars that my not be correct set the standard for the class.


Jim uzzled:

 

Show me one post that says they are. Then look at the actual numbers and see if anyone is running the NHRA specs, most are closer to the 'advertised' OEM numbers.

The NHRA rules are a maximum guideline, not a goal. The goal is to maximize the factory pieces. I built a motor for my car to run Pure Stock, and it was easy to see where I could cheat: aluminum flywheel, knife edged crank, lightweight rod, lightweight pistons, blend this, port that.....blah blah blah. In the end, I wanted to know what I could do with my car, so everything went back together stock. I could not tell you what my heads cc at, how far in the hole my pistons are, or anything else.

 

casey i took 3 pairs of heads to my local guy a year and a half ago , 4 heads were 90cc and 2 were 92cc whats funny is i had 2 pairs i know came off the same engine and both those pairs , 1 head was 90cc , one head was 92cc .

i did not do these heads myself and unsure of the accuracy of how they were done .

though since looking at one pair i have recently , one had an exhaust seat replaced , can't say for sure if these were actually heads i had tested , but i think they were . i did sell one set , not sure if they were the 90cc or 92cc heads .

 

casey i don't have to drive 850 miles one way to see that happen . nevermind a 383 getting beat by the same car with a 340 :rant:

 

but its those cars that have the bragging rights of being the fastest .

 

Bullshit ! Have you not been following this thread ???

The cars that are running the fastest are certified, and are not ported, releived, stroked, and bored...............or built to NHRA specs.

 

John

Bragging rights to be the fastest!! John you miss the point. The guys who were trying to be the fastest were cheating and got busted..and went off to start there own events. Thus Certified and volintary inspections came along to prove -no or less cheating.
The process was invented to let us PROVE we weren't Cheating!!
That we weren't Maxeed out race engine's , that It actually took some talent to get there. I believe now the process might be taken advantage of, But the majority proved Driver ,SET-UP,And Tuning is where it's at...

Pure stock drags - theres no trophy, no pay out , 2out of 3 race no matter how fast. Drink beer- hang out with friends!!
I have read all the posts, just seems to me your holding a big wooden spoon standing over the pot. Some of your questions would be better answered by reading the rules BOB and DAN provide. Build the car then come play..
It's not just you implying things on the board,that I understand, but you were the last one to annoy me! o No:

 

John,

If this is over 1/2 point or 1/4 point of compression than I guess your right it is not stock. I will tell you this. If we could sample the real deal stock stuff I bet you that the compression would be all over the place. I bet it would vary more than you're stating and would even vary a 1/2 point. The tooling of the time is so different than today. I've bought motors that have had factory bearings that take up an extra .002 in journal to use a crank instead of garbage can it.

Jim