Stock Eliminator secrets?

[RDY4WAR]

Possibly related to Stock and Super Stock engines, the LS engines have a trick for increasing the preload on the lifters with longer pushrods. It supposedly makes the lifter act like a short travel lifter, increasing stiffness of the valvetrain and making slightly more power. Is this a trick that could apply to older hydraulic lifter engines as well?

[EDC]

A big part of my program has been the Elston 4-2-1 headers. We were testing headers and had four sets on the engine during one dyno session. What we saw with the Elston's led me to further conversation with Calvin and further gains both on the dyno and at the track. Where we ended up is about 180 degrees from how most approach things with a 305 or 350 Stocker engine, but it's worked well.

You have to have a good short block with minimal rotating drag, good heads and intake. Given that, I can't imagine doing another Stocker without starting with a set of Calvin's 4-2-1's and working backwards....starting at the collector and ending up at the cam.

On the dyno, we test the headers as they are run on the car.

Very smart man, Calvin. Spoke to him yesterday about our new engine package. He is doing our NMRA Coyote Stock headers in a few weeks. Getting the new ECU wired up at Racewires in PA but as soon as Troy is done, she's getting her new pipes and track testing!

[jed]

RDY4 how much more preload are you talking about. On a LS .025 longer push rod is about a half turn. Are you talking about 1 or 2 turns on the rocker adjustment.

[tenxal]

i guess you tried black electrical tape mod on the QJet rear metering rod holes ?

This is a better solution for several reasons. Danny Ashley is a smart, smart guy on QJets. It's a shame he doesn't do them anymore. His QJets are in high demand and rarely become available. I'm fortunate to have one of his plus several others to work with and learn from.

[tenxal]

Possibly related to Stock and Super Stock engines, the LS engines have a trick for increasing the preload on the lifters with longer pushrods. It supposedly makes the lifter act like a short travel lifter, increasing stiffness of the valvetrain and making slightly more power. Is this a trick that could apply to older hydraulic lifter engines as well?

NHRA now lets the hydraulic lifter engines run solid lifters in Stockers.

[tenxal]

As far as the short block, what is a good inch pound number for a stock eliminator engine. Care to comment on the piston and ring package. Thanks for your professional input and practical experience to this thread.

With the NHRA mandated stock ring groove widths (5/64, 5/64", 3/16" in my case), break-away torque is 11-12 lbs./ft. with a constant rotational of 8 lbs./ft.

That's the complete short block...fresh hone, crank installed/torqued, all 8 rods installed/torqued, all 8 pistons with the full ring packs, rear main seal, crank gear, cam gear and timing chain.

Thanks for the compliment.

[77cruiser]

As far as the short block, what is a good inch pound number for a stock eliminator engine. Care to comment on the piston and ring package. Thanks for your professional input and practical experience to this thread.

With the NHRA mandated stock ring groove widths (5/64, 5/64", 3/16" in my case), break-away torque is 11-12 lbs./ft. with a constant rotational of 8 lbs./ft.

That's the complete short block...fresh hone, crank installed/torqued, all 8 rods installed/torqued, all 8 pistons with the full ring packs, rear main seal, crank gear, cam gear and timing chain.

I thought it would be less, but I guess with the fat rings it won't get much better. About the same as my 421 with skinny rings.

[Rob R]

I buzzed through the 12 pages of this thread on stock eliminator secrets, anybody mention ring spacers?

https://dragracingonline.com/archive/te ... %26hl%3Den

[1972ho]

WOW close to 15000.00 in headers that is more than I have spent on my whole car and it runs over a second under the index and that’s with a standard set of 2 inch hooker headers with a merge collector.WOW ain’t that something.

[86_regal]

As far as the short block, what is a good inch pound number for a stock eliminator engine. Care to comment on the piston and ring package. Thanks for your professional input and practical experience to this thread.

With the NHRA mandated stock ring groove widths (5/64, 5/64", 3/16" in my case), break-away torque is 11-12 lbs./ft. with a constant rotational of 8 lbs./ft.

That's the complete short block...fresh hone, crank installed/torqued, all 8 rods installed/torqued, all 8 pistons with the full ring packs, rear main seal, crank gear, cam gear and timing chain.

I thought it would be less, but I guess with the fat rings it won't get much better. About the same as my 421 with skinny rings.

Really?

THE lowest I’ve ever heard on a SBC (8 cylinder of course) was 7 lbs/ft of rotating torque... 1 lbs/ft difference could be error.

THE lowest I’ve ever witnessed was 11-12ish rotating and I’ve been fortunate enough to have been around a lot of very sharp and competent builders/racers.

[86_regal]

WOW close to 15000.00 in headers that is more than I have spent on my whole car and it runs over a second under the index and that’s with a standard set of 2 inch hooker headers with a merge collector.WOW ain’t that something.

...And why do you suppose that is...?

Here’s a hint... in question form.

How many more cars would you guess have competed in the 275HP 327 class in the past 50 years than the class your car competes in...?

[lefty o]

As far as the short block, what is a good inch pound number for a stock eliminator engine. Care to comment on the piston and ring package. Thanks for your professional input and practical experience to this thread.

With the NHRA mandated stock ring groove widths (5/64, 5/64", 3/16" in my case), break-away torque is 11-12 lbs./ft. with a constant rotational of 8 lbs./ft.

That's the complete short block...fresh hone, crank installed/torqued, all 8 rods installed/torqued, all 8 pistons with the full ring packs, rear main seal, crank gear, cam gear and timing chain.

Thanks for the compliment.

so the stock ring grooves are mandated, but does that mean you cant run a thinner ring with a spacer under it?

[1972ho]

I’m not really trying to be a smart azz are anything but that is a chuck of doe for a class that only pays 1200.00 to win if that and hardly any contingency.If I spent that kind of scratch I would be 2 seconds plus under if not more.

[nhrastocker]

As far as the short block, what is a good inch pound number for a stock eliminator engine. Care to comment on the piston and ring package. Thanks for your professional input and practical experience to this thread.

With the NHRA mandated stock ring groove widths (5/64, 5/64", 3/16" in my case), break-away torque is 11-12 lbs./ft. with a constant rotational of 8 lbs./ft.

That's the complete short block...fresh hone, crank installed/torqued, all 8 rods installed/torqued, all 8 pistons with the full ring packs, rear main seal, crank gear, cam gear and timing chain.

Thanks for the compliment.

so the stock ring grooves are mandated, but does that mean you cant run a thinner ring with a spacer under it?

Yes, you can run spacers with a thin ring.

[Rob R]

[/quote]

so the stock ring grooves are mandated, but does that mean you cant run a thinner ring with a spacer under it?
[/quote]

lefty o, you can run a thinner ring, however, the ring groove spacer goes on the top side of the ring groove.