LS Engine on Simtester @ Costa Mesa R&D Automotive Machine

We have an LS-3 on the Simtester for a low stress break-in to ensure that the lubrication system is pre-lubed and ready for action. www.engine-machining.com

Category:

Autos & Vehicles

Tags:

• chevy
• chevrolet
• corvette
• ls1
• ls2
• ls3
• ls6
• ls7
• simtest
• engine
• rebuilding
• machining
• rebuild
• machine
• work

[lillen300]

How important is it to have a balanced engine, and what is the benefits?

[fiatnutz]

@lillen300 -Very, it will extend the life of the engine.

[kreigsmann]

simtest is genius!

its so simple but i never though of that as a way to beak in a engine.

does the rpm change on the tester for better break in?

how long does it stay on the tester?

[fiatnutz]

@kreigsmann - I slowly bring the engine up to 200 rpm and let it run there for about 30-40 minutes. You still need to do the 2000 rpm for 20 minutes once the engine is in the car and running.

[racernate02]

Yeah, the old 2 valves per cylinder sure is crap. That must explain how a 500 ci American designed V8 can make 8,000 HP. I have yet to see a 4 valve even sniff that territory.

[lesly1220]

Thank's for post that LS video Mr.Edwards I hope you do of those in the future.

[2jzgtejza80]

@fergus1494

There's no 429CUI engine producing 2000bhp NA, not even bulit by NRE nor ProStock class. It's impossible even with desmodromic type of valve actuation.

800CUI engine needs to rev 10,500-11,000 rpm to reach 1500bhp NA. Pushrods are not reliable at such a high speeds as OHC (pneumatic valve control - Formula 1)

[2jzgtejza80]

@fergus1494

Like I said before, OHV or OHC, no matter, both have advs, and disavds. DOHC design was proved many times in racing very reliable. Also americans are pretty blinded when it comes in term of reliability. Reliability depends about quality of materials and how it's built. Simple system doesnt mean its more reliable. I have several examples where OHV engine failed in racing. Old Ford V6 OHV, than many 4cyls OHV , even many V8 SBC's. Also same is with OHC.

[2jzgtejza80]

@fergus1494

Balance of engine makes engine unique. If it's not well balanced, everything is fucked up.

[fergus1494]

@2jzgtejza80 Anything is capable with money mate. Why use a more complex and more expensive system when a simpler and more reliable system has already been developed? And when something goes wrong on the simpler system its much easier and faster to find and fix. There are engines around using heads designed off the boss 429 hemi heads that make 2000hp NA. The extra weight up high, the more complex system with more moving parts really hasnt got an advantage under 9k rpm.

[fergus1494]

@lillen300 I dont think having a well balanced engine will effect fuel consumption much - thats more to do with combustion efficiency and port efficiency. It will (stating the obvious) reduce vibrations slightly and of course as already said increase engine life - less wear. The engine will spin more freely - but not by much.

[fergus1494]

@racernate02 4 valves are only because its lighter to get the same size valve area.. your opening and closing two smaller valves instead of one large. I personally feel the advantage of this is nil below consistent use of 9+ thousand rpm. Plus the extra costs, more moving parts and more complex designs i think 4 valve engines shouldnt be used in motorcars.. you shouldnt need to spin an engine past 9 because of the accelerated wear. A 2 valve hemi engine would be fine for most applications.

[jboydmv90]

How much for that exact engine?

[2jzgtejza80]

@inteligentvtec

They was made from titanium before, today using dur-aluminum alloy, only al-alloy that can endure high stress.

Yes, block and head are billet machines Al-alloy, sleeve's are ''cast in block'' made from tempered ductile iron (better cooling and lubricating than steel). Every part of the engine is forged, aluminum, steel or titanium, except sleeves, are cast. Even they using copper gasket.

[inteligentvtec]

@2jzgtejza80 on a top fuel engine the rods are aluminum not forged steel. forged steel cant take the shock of nitromethane, they have no give. the aluminum actually allow a bit of twist and flex so they dont break. the block is also alluminum, with steel sleeve's they literally drop in, which take no time to swap. but ya dohc is way more efficent, but when you start cramming that much air into an engine forget about trying to be efficent cuz then you have to burn sooo much fuel to keep it cool.

[2jzgtejza80]

@racernate02

They make that power using everything but not technology. Massive heavy 14-71 Roots blower at 75psi + Nithromethane fuel, 24-32 spark plugs, 8 independent fuel pumps (each bigger than 1 in LS7)... that's why....

and also every part of Top Fuel engine including block are forged. NELSON RACING ENGINES are capable construct DOHC type of Top Fuel engine, but that would be expensive. NELSON already have 500 CUI DOHC producing over 1500 hp in NA trim and 2500+hp S/C or T/C.