Explain to me again, please

[GUMP]

I must be really dumb running hydraulic lifters, stock rockers, and beehive valve springs on my non-VIN, state of art, factory race cars.......

[Terry Cain]

Originally Posted by GUMP

I must be really dumb running hydraulic lifters, stock rockers, and beehive valve springs on my non-VIN, state of art, factory race cars.......

What type of Hydraulic lifters?
Hell Daren. Your searching now for ways to slow it down to not get a hit.

[GUMP]

Originally Posted by Terry Cain

What type of Hydraulic lifters?

I am running the full travel Johnson rollers that Chevrolet puts in the motors.

Hell Daren. Your searching now for ways to slow it down to not get a hit.

Absolutely, I read Nitro Joe's Stats. If you look at almost every class, there are plenty of combinations that can out qualify my cars. Why wouldn't I try to protect my investment the same way that the 396/375's, etc. get protected?

The NHRA has me nervous right now. The possibility of someone interpreting what I might have run and penalizing me for it, goes against the spirit of class racing.

If I get myself dinged in a heads-up run or trying to qualify number one, so be it.

[L.Fite]

Are there that many failures using a standard solid lifter in a stocker motor? The NASCAR guys used standard solid lifters for decades. I know the ramps are more aggressive in Stock these days, but a tool steel lifter for a .312" lobe? Are people turning stocker engines to 10K?

Well... one point is NASCAR was running a solid MUSHROOM tappit, as far as I know, those aren't allowed in stock...

Also NASCAR engines use larger diameter cams and last I heard was running an enclosed pressurized cam tunnel to make their stuff live...

That was years ago, are they still even using solids?

Any way... comparing apples to grapes.
Not much NASCAR does even compares to stock eliminator really.

JMHO

[SBillinson]

Originally Posted by L.Fite

Are there that many failures using a standard solid lifter in a stocker motor? The NASCAR guys used standard solid lifters for decades. I know the ramps are more aggressive in Stock these days, but a tool steel lifter for a .312" lobe? Are people turning stocker engines to 10K?

Well... one point is NASCAR was running a solid MUSHROOM tappit, as far as I know, those aren't allowed in stock...

Also NASCAR engines use larger diameter cams and last I heard was running an enclosed pressurized cam tunnel to make their stuff live...

That was years ago, are they still even using solids?

Any way... comparing apples to grapes.
Not much NASCAR does even compares to stock eliminator really.

JMHO

No, they haven't run mushroom tappets in the Cup series for at least 30 years.

Larger diameter cam cores are used to reduce flex and produce better valvetrain stability, especially in engines with splayed or canted valve heads. They are widely used, even in Super Stock.

Cam tunnels are used primarily to reduce windage on the rotating assembly.

You're right about one thing, though. NASCAR is very different from NHRA Stock Eliminator.

The point, however, is that if a 750-850 HP, 358 CID, canted valve, flat tappet engine in a Cup car can run 500 miles at over 9000 rpm with a stock diameter solid lifter, then it's hard to imagine why it can't be done in a stocker that doesn't anywhere near that RPM and is raced a quarter-mile at a time.

[Terry Cain]

Originally Posted by GUMP

The NHRA has me nervous right now. The possibility of someone interpreting what I might have run and penalizing me for it, goes against the spirit of class racing.

I'm a little older than you. That's the way it was done in the old days and you didn't have a word to say about it.

[GUMP]

Originally Posted by Terry Cain

I'm a little older than you. That's the way it was done in the old days and you didn't have a word to say about it.

And that's the right way to do it?