350/255 Chevy
 

Can you run Super stock cam in a block built for stock. ?

Re: 350/255 Chevy
 

You can get a Super Stock cam ground for stock diameter cam bearings, so I don't see why not. I assume Stockers use Stock diameter cam bearings? Heck, maybe not. You can have a Super Stock cam made fit any size cam bearings.

Re: 350/255 Chevy
 

Please give us more information Dan.

You have access to a solid roller out of a 350/255 engine? Are you trying to run said camshaft in Stock Eliminator?

Like Ed said, if it has stock diameter journals, not big block, not metric, it should go in the block and rotate.
I would expect it to have much more lift and duration than a stock(er) cam.
What will you do for valve springs? Lifters? Rocker Arms?
What about piston to valve clearance?


Will it fit? Maybe. Will it work? You have to cover the bases.

Re: 350/255 Chevy
 

I would also be concerned about valve-to-piston clearance. My pistons look like a horse stepped on them.

Re: 350/255 Chevy
 

Thanks Tom...
I have a Budd Rowe built Stocker engine been sitting around a while wrapped up. Has Pink Rods, Forged Pistons, 2 Bolt mains.

Building a 1969 Impala for Stock. Another racer suggested since it needs modern upgrades consider building a Super Stock engine. Add a SS type cam, better valve train and Intake. Does not have to be a world be a world beater but a reliable runner.

Stocker to SS. Is it just a cam and intake change?
In Stock Solid Lifters and Roller Rockers are allowed.
Replacing with Roller Lifters and Cam should be straight forward.
Correct?

D

Re: 350/255 Chevy
 

Daniel, many of us have a lot of money in our heads & Intake manifolds. Super Stock rules are much different there. It won't be very fast with Stocker heads & Intake.

Re: 350/255 Chevy
 

Dan,

#1....Join NHRA

#2.....Get NHRA rulebook.

#3.....Read NHRA rulebook

Re: 350/255 Chevy
 

Sounds like SS/LA? If so, not an easy index in my opinion.
Tough to do with "stock" heads. I attempted a set of "budget"/non welded 441 heads once. I still needed long valves and shaft rockers.

What rocker ratio is your cam designed for? Shaft rockers might be your only option.
I like your idea. If you have a bunch of upgrades to do for Stock, explore your options with a few more upgrades. You're never going to set the world on fire, but you need to run the index and avoid heads-up runs. Can you do that?

Re: 350/255 Chevy
 

Read the rule book extensively..
Been an NHRA member since 1970.
In SS car can fall in L, M or N.
Know it can be a K/SA maybe a J/SA
Figured Shaft Roller for stability.
Would confer with John at Bullet Cam what would be best parts.
Just did not want to carve up a set of 441 heads.
They are not as available as in the past.
Hoping well prepared Stocker heads would be compatible enough.
Can a 2 bolt main block prepared for stock live in a Super Stock Engine.
Or do you need an aftermarket block and just start over..

D

Re: 350/255 Chevy
 

The Stocker pistons will not have valve notches that would work with a SS type roller cam. Not even close.

Re: 350/255 Chevy
 

Yes, a Super Stock profile can be ground on a stock journal cam core.


No, you will not have nearly enough piston to valve clearance with Stock Eliminator pistons and a competitive, even marginally competitive Super Stock cam.


No, legal Stock Eliminator cylinder heads will not be competitive in Super Stock, and no, they will not likely work with the appropriate valve train for a Super Stock camshaft without major modifications.


And no, the short block you describe will not withstand running it like it is a competitive Super Stock engine.


Do yourself a favor, and build a good legal Stock Eliminator engine. Consider a combination that isn't utterly flogged to death.

Re: 350/255 Chevy
 

Dan, why don't you just do a 350/250/230 and call it a day. You can use all of your 255 stuff and it fits into O/P/Q so not a lot of heads-up stuff. All you'll need is an intake and the right carb.

Re: 350/255 Chevy
 

What he said!

Re: 350/255 Chevy
 

O/P/Q Stock, correct? Once he cuts the spring pockets for roller springs, his 441 heads he doesn't want to "carve up" aren't good for stock anyway.

Re: 350/255 Chevy
 

I considered that but sold the 2v intake and carburetor !
In O/SA would be fairly light.
Not have to worry about a roll bar and fancy seat belts..

Yeah do not want to cut up a set of Stocker heads.

D

Re: 350/255 Chevy
 

What Billy said would certainly be the easiest way to get out. it will live a long time with a 2GC I have not looked in a while, but I think 230 is now 226. If it was light in O, you would really have to load up to get to Q. I think P is the way to go at 13.45. Good Luck
MJ

Re: 350/255 Chevy
 

Do the 2Bbl stocker,just the changes you would have to make for a budget SS engine would cost more than a complete decent stocker engine. Been there done that.

Re: 350/255 Chevy
 

Still shows 230hp..
Should be painted in few weeks finally.
Needs glass and interior.
Leon Miranian has the trans.
Need roll bar and fuel system.
Engine has 4bbl and two Qjets rebuilt for K/SA..
Currently an Impala, but can convert to Biscayne or Bel Aire.
Do not have a place to work on it conveniently.

Re: 350/255 Chevy
 

Yes, big car hasn't been reduced as much as Camaro /Nova..Still a decent combo.Should be able to get hp off if you play along.

Doesn't need a roll bar with the 2 bbl combos.

How do you convert an Impala into a Bel Air or Biscayne..pray tell?

Re: 350/255 Chevy
 

Yeah, considering a Biscayne would be a 2 door sedan with a different roofline, I doubt just changing the emblems would get you thru tech.

Re: 350/255 Chevy
 

If you need castings: http://classracer.com/classforum/showthread.php?t=72075

Re: 350/255 Chevy
 

Bel Air and and Biscayne roof line same as Impala...
Caprice is different, squared off.
Impala and Caprice six tail lights.
Bel Air and Biscayne are four.

Re: 350/255 Chevy
 

'69 Impala:

https://i.imgur.com/lv3IqQFl.jpg

'69 Impala Custom Coupe:

https://i.imgur.com/NMabAK5l.jpg

'69 Biscayne/Bel Air:

https://i.imgur.com/O4AA9AZl.jpg

Re: 350/255 Chevy
 

It doesn't matter, Biscayne, Belair or Impala are all O/P/Q.

Re: 350/255 Chevy
 

1969 Impala at Moroso West Palm Beach, FL November 1988
Temp was 85 Degrees, clear low(er) humidity day.
That was cool for South Florida.

This was the Impala's best ever run at 12.80 104 mph.
Never got a cold weather run out of it.
Index was 13.05, dropped from 13.15, from 13.36

Natural L, added weight to run M/SA.
Engine by Woodro Josey. Lunati Blue Print Cam
Back then could drop a class but not go up.
Won Points meet at WPB in 1983, Paul Forte won SS.

Engine rated at 280hp.
Weighed 4150 lbs.
Used street gas.
No Roll Bar required.

This car would have fit IHRA G/PS rules.

Re: 350/255 Chevy
 

It's easy , Alan. You just change every body panel from the cowl back... for no good reason LOL

Re: 350/255 Chevy
 

I don't know how to post pictures.....

But if you Google Dave Boertman's Biscayne....

You'll see his car that won big in 1970...…He won the first Summernationals held at York and was World Champ, I think with it....

Yellow 2 dr sedan.....N/SA and a 350/255

Many very successful racers jumped on that engine combo....

No way it was 40 hp lower than a 10-1 engine.....and they knew it....

It became one of the most popular engine combos in Stock and SS for years and years and won many many races.....

They must have made a lot of 441 heads cause they are still out there and were only used for 1 year on 350's....

They did put them on some 1970 cars including some 400's IIRC but with different exhaust valves and steam holes......I think !

Re: 350/255 Chevy
 

Dan, I would check on roller cams & lifters in Stock class ??? Only if they came with those cars... Also remember there's a Big drop on running a 2bbl vs a 4bbl Q-jet ??? Talk to Billy & Marc & Bruce Noland about running 2bbl cars ???? They can help you !!

Re: 350/255 Chevy
 

This car was originally owned by Bob LaSala.
He ran it with the 300hp engine in J/SA.

Had a hard time making it run the index until Woodro built the engine.

Dan

Re: 350/255 Chevy
 

Bingo. ;) -Al

Re: 350/255 Chevy
 

In 1969/1970 seemed like almost everybody had a 255 350".

Re: 350/255 Chevy
 

Was looking at HP for a Chevelle with a 350/300.
NHRA lists it at 275...mine is at 290hp

Bob Benders craftiness got his 350/255 69 wagon set at 263 hp..!
My car could run N/SA with weight..

Asked NHRA to set mine the same and they said NO !

Re: 350/255 Chevy
 

Good lord..Sounds like the fake news on one particular cable news network
Your first mistake was asking you know who, anything.
Full size 69 Chevys all carry the same ratings. 263 in Stock, automatic.

Re: 350/255 Chevy
 

No Mark...
Looking at the Sedan and 4 door they get 350/255 listed at 275hp.
Bob’s wagons 263 hp same engine.

1968 427/390 corvette was at 371 now 366....but not others.

Just interesting how identical engines in the cars do not receive the same rating.

Re: 350/255 Chevy
 

Dan,Dan,Dan,ALL "full size 1969 Chevrolets" that's ALL,ALL,ALL, are at 263 with auto. Although I wouldn't doubt that that mean, old Bender and the mean,old NHRA are conspiring against you!

Re: 350/255 Chevy
 

The only ones at 275 in the '69 full size cars are manual trans. Everything else is at 263.

http://www.classracerinfo.com/CGPage...MAKE=Chevrolet

I suggest you register on Dwight's site and enjoy the tools he's provided. :) -Al

http://www.classracerinfo.com/

Re: 350/255 Chevy
 

Dan is correct, NHRA only lowered the HP on 69 full size wagons!

Dwights site is informative but incorrect.

Re: 350/255 Chevy
 

Thank you..
It was lowered several times. Originally 280 to 275.

Located all the dates.
Bob's wagon dropped to 272 (1/1/2018), then briefly 267 then to 263 (1/1/2019)…!

http://nhraracer.com/content/general...312&zoneid=132

OK with me..! Just the way it is!

Re: 350/255 Chevy
 

You have to know how to play the game. Just 69 wagons, sorry guys.

Re: 350/255 Chevy
 

Well Dan, sorry, I was wrong.
(probably that mean, old Benders fault)