LD340 and NHRA
- Thread starter 70aarcuda
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Marcohotrod
Well-Known Member
aftermarket intakes should not be legal in stock, they generally do not crack or turn to junk. aftermarket heads should not be legal in STOCK; superstock O K, if port size etc. is modified to not exceed stock. back in the day I bought a good used ld340 for $20, and sold one for $40. Chrysler made and installed some production aluminum intakes, just not enough
Marcohotrod
Well-Known Member
for small block mopars the ld340 is no longer legal in STOCK, and Ed heads are not legal. In superstock Ed heads can be modified to be legal (reduce ports size) and ANY intake is legal. works for me
Edelbrock 60197: NHRA Performer RPM Cylinder head for Chryler 340 Small Block | JEGS
Set of these were on the US National winner last year
Set of these were on the US National winner last year
Johnny Dart
Well-Known Member
NHRA legal Performer RPM aluminum cylinder heads for Stock and Super Stock racing classes. These heads are similar to Edelbrock RPM cylinder heads, however the NHRA Legal heads do not have any machining or hand grinding done on the ports & chambers, except for the seat guide bores. Heads feature the NHRA logo on the ends for easy identification. Heads are sold individually. Made In The USA!
Since they are 65 cc ..my guess is they are open chamber heads....wondering if the 11/32 valve stems are legal or do they need to open the guides up to 3/8.....
It is up to the racer and/or engine builder to make sure that the runner volume and combustion chamber CC's are no larger or smaller in volume than what their particular engine corrected horsepower is approved by the NHRA Race Committee. The runner and chamber volume CC's listed below are what they are supplied from Edelbrock, not that they are approved for this volume in your particular class.
Since they are 65 cc ..my guess is they are open chamber heads....wondering if the 11/32 valve stems are legal or do they need to open the guides up to 3/8.....
It is up to the racer and/or engine builder to make sure that the runner volume and combustion chamber CC's are no larger or smaller in volume than what their particular engine corrected horsepower is approved by the NHRA Race Committee. The runner and chamber volume CC's listed below are what they are supplied from Edelbrock, not that they are approved for this volume in your particular class.
Problem is simple...THE LD340 INTAKE MANIFOLD WAS NOT ON THE ENGINE WENT IT ROLLED OFF THE ASSEMBLY LINE....that is nhra reason..
Johnny Dart
Well-Known Member
Thats what im saying. It is not a factory, assembly line part.
My question is, why was it EVER legal ?
It should have NEVER been legal in the STOCK class.
So again I ask (read post 25)
Some one wrote a letter to nhra and made a case to make it legal because of the part number....then the other brands started complaining and they wrote letters to nhra claiming it was never installed....nhra did some research on a 50 yr old intake and decided it was not offered from the factory
Tony,
I'll buy your friends cut up and rewelded LD340 for 250...
I'll buy your friends cut up and rewelded LD340 for 250...
He is putting on a street car......btw he has 3 Ld 340s....
These are legal in stock....lol
A Look At Geoff Turk's Seven-Second Stock Eliminator Engine Effort
These are legal in stock....lol
A Look At Geoff Turk's Seven-Second Stock Eliminator Engine Effort
so if you bought your car new and had the dealer install the ld340 before deliver your factory car came with it?? Its a mopar accessory so why could it not come on it new. Its like adding on factory mud flap. This is all BS
Not installed at the factory is the difference.
How the car was delivered if hustle stuff was dealer installed is not "factory" installed.
How the car was delivered if hustle stuff was dealer installed is not "factory" installed.
Other than six pack intakes, what else?
Marcohotrod
Well-Known Member
I think hemis and max wedge engines had aluminum intakes
Slant 6 had an aluminum intake on the dart lights.
LowDeck451
Well-Known Member
I thought this was interesting about the heads. A few years ago I asked a Stock Elim. racer about the NHRA Edelbrock heads he had on his 340. He told me the heads were approved because usable original cast iron heads were getting harder and harder to find, and that the NHRA had approved a replacement aluminum head for the Chevy's several years before that. He also told me he had to put the weight savings from the aluminum heads back onto the FRONT of his car. Did the NHRA already approve an aftermarket intake for the Chevy's too? I dunno.
The reason is because these parts are becoming scarce. That particular cast intake was a what, a three year deal on a limited run of models?
Accepted legal replacement parts for stock began with connecting rods, blocks, cranks, and now cylinder heads.......the consumables. Eventually the LD340 will be legal again as these parts continue to dry up and the whining in stock subsides.
When some X-head hoarder croaks and his supply of unmolested castings are offered on an estate sale.
replicaracer43
Grumpy Old Man
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I'd bet "308" would be the choice, if you could find a un cracked set
Inertia
Well-Known Member
After purchasing my new 69 Swinger 340, I actually went and ordered and installed the Ld340, 3310 Holley, and the Hooker headers listed in the Hustle Catalog, from my Mopar Dealer, maintained warranty, and raced for decades. I still own/ drive the car today. Lol
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