Forum: HoseHeads Sprint Car General Forum (go)
Moderators: dirtonly  /  dmantx  /  hosehead

The engine in question was taken straight out of the crate and onto the dyno. The only thing they did was to check the cam timing to make sure it was ok to run. The engine made 740 horsepower.

As far as the parts they are mostly Scat products. We, meaning Shaver-Wesmar Gear Drives are in the process of making a front cover and gear drive for this engine.

I know manufacturers in the hayday of muscle cars lied bigtime about the HP their big block and small block motors were making, at first for drag racing rules purposes, then for insurance purposes, but didn't know it was still going on today. I have to believe the above post but GM advertising their 7 Liter ZO6 Vette engine at 505HP when in fact it cranks out 740 on the dyno, wow, didn't know that was still happening.

Lawlessness + liberalism = HELL -  NYC, Detroit, Chicago, 
Seattle, LA  Who the H runs those cities. 

Since Mr Wesphal said it I find it hard to argue his numbers, but man, it seems sooooo hard to believe that the LS7 makes 230+ more HP than advertised out of the box. I mean, Lingenfelter has both supercharged and turboed versions of this engine that they claim make 750 and 800.

And yes, the auto industry still does alter their output numbers, for insurance, or whatever other reasons.

Hawker, aren't some sprint cars already running a battery, to power an MSD type electronic ignition? I know several years ago MSD became the rage and a lot of guys chose them over a mag. Just wondering.

thought a majority (up to date) midgets are running a battery ? baaah humbug! Mechanical injection, and selfexcited mag , just my preferance... what CFM is this toilet bowl injection worthy of?

4 small bricks for tires and the engine rules and everything else would take care of itself.

If you can't get the hp to the ground you don't need it.

But we do not want Goodyear's because they do not hook up as well, right lol

They will burn them up with their big motors

Maybe the best driver and not the best motor will do well

Any more details on this engine?

Was the dyno run on gas or alcohol? Mechanical injection or electronic? Wet or dry sump? Magneto?

In the car did it have a battery? Starter?

Anyone have pics of it in the car?

Like I said above it was run as taken out of the crate.

14:1 compression ratio

Hydraulic roller lifters which limited the rpm's to 8000 maximum

Hawker, aren't some sprint cars already running a battery, to power an MSD type electronic ignition? I know several years ago MSD became the rage and a lot of guys chose them over a mag. Just wondering.

Several years ago the battery type would produce a hotter spark or more voltage than a regular mag at lower rpm. So a crisper spark would mean a better take off on starts. Karl Kinser was one of the first to use a battery.

I haven't seen a battery for a mag for quite a while, so the newer mags must be improved to where an external battery is not required.

I have not read up on the newer mags.

.

Well then this test motor must be a new race ready crate engine from GM. The crate street version available now is 11:1 compression (14:1 on pump gas would not be good) so I could see where perhaps GM is considering offering a race ready crate engine with minor variations from their street ready version. Cam design would have to be different in my estimation as the needs of a dirt oval racer and that of a streetable engine are pretty far apart.

"Winged or non-winged its all about 
the sprint cars for me!"
http://mattmusselldesigns.daportfolio.com

Shaver sells crate engines with modifications.

http://www.shaverengines.org/crate.html

.

Race ready crate engine! Now that makes more sense. I talked to a GM mechanic friend about this claim that the LS7 production engine cranked out 740 HP on the dyno right out of the crate. He said NO. There is only one LS7 crate engine on the GM Performance Parts website. It states it is the ZO6 engine. This Schatz engine is probably a "racer ready" small block based on the LS7.

Back to this website, I could hardly believe the number of engine combinations they have available for under $20,000, like a 572/572HP or a 502/502HP or a 350/300HP and everything in between. Evrything included except wiring harness. Also, Roush-Yates started building dirt sprint and late model engines about a year ago. Think I read that Josh Richards or McCreadie or another big-name LM driver is using them successfully.

Lawlessness + liberalism = HELL -  NYC, Detroit, Chicago, 
Seattle, LA  Who the H runs those cities. 

Schatz in grand forks again!

Amazing the lengths some guys will go to just for a.....................DUNKIN DONUT!

TSA...It's not a GROPE...it's a Freedom Pat!

Was he running that engine tonight? Qualified 36th ... ??

Phil Taylor

home-theater-systems-advice.com

I've been thinking about this a little more since my last post and have some additional thoughts to add.

If a "stock" LS7 in a Z06 produces 505 HP, then one that is stripped of the crank-driven "accessories" like air conditioning, air pump, alternator, serpentine assembly, etc would free up a bit of power. Also, bolting on open race headers in place of the stock headers, cats and mufflers (with air flow sensors and all the other emissions crap on street cars) would free up even more power. I'm still left thinking that this has to be a "race only" crate assembly though considering how it made almost 50% more power on Wesmar's dyno than a street piece in a Z06.

artist2, I'm just relaying the information from one of Ron's assemblers that I talked to about this the other day. We didn't dyno this engine, all of this was done at Shaver Specialties in California.

Kelly, like my original post said, I'm in no way questioning you or what you said. Just trying to make sense of how this 427 beast makes so much power out of the box. Hell, for 15 G's maybe I'll get one and bolt it in my ride. haha

I've been working on, testing, building, dynoing LS series engines for easily 10 years now.

The LS7 engine is 505hp, it may dyno 520hp, not 750hp, the factory engine is 11:1 compression and averages 450hp on a chassis dyno in a C6Z06 Corvette.

Just yesterday I dynoed a 440ci LS7 stroker, 11.5:1 comp, 244/248 hyd. camshaft, street engine dynoed 650hp@6300rpm

Still these engines are a great foundation for building horsepower, ported LS7 heads can flow [email protected]" lift, SB2 head territory.

Fraser - AES Racing Engines

Donny raced it at Knoxville last year in the World Challenge and was plenty competitive. This is the "Way of the Future".