jkwalkercchs

iTrader: (21)

saw a crank with hat stroke for the ls motor just curious what that would be used for im guessn high revvin fun

zz4camaro1980

do you have a link? that would make a nasty little 304!

jkwalkercchs

iTrader: (21)

lol i was just wanderin on the ls sites
so what the hell would u want a 304 4

slow trap

iTrader: (22)

if i was guessing i would think it would be for a racing class with cubic inch rules or maybe weight/ci rules .it would be around a 340-341 with a 4.125 bore. maybe sprint cars or something ?

jkwalkercchs

iTrader: (21)

so high rpms it said it had 1.88 journals tho i cant find rods for that lol

Old SStroker

Daytona Prototype LS engines are limited to basically stock 5.7 L bores and 5.0L total displacement. That makes a 3.185 stroke just about right. At their 7100 rpm rules limit, that is a fairly lazy mean piston speed of 3770 ft/min.

I suggest that these cars are definitely a fun drive! They race for 24 hours at Daytona later in January.

When Cadillac first went racing with the CTS they used a 5.7L version of the LS7 engine. The 3.185 stroke would also have worked here with a 4.165/4.175 bore. The eventually had to revert to the LS6 engine. In either case above, a used 3.185 crank might have MANY rpm cycles on it. Caveat emptor.

jkwalkercchs

iTrader: (21)

so these things can rev more than 7100 safely

jkwalkercchs

iTrader: (21)

where can i find rods with 1.88 journals though

DONAIMIAN

iTrader: (18)

Your stock crank can rev to more that 7100 safely. As for the rods, some companies like callies manley, oliver so others might stock what you need, but im guessing if you use a stroke that short you will have to order a custom length rod and custom piston.

jkwalkercchs

iTrader: (21)

im lookin at a 3.500 stroke ls1 bore on a 5.3 block and lots of spray

DONAIMIAN

iTrader: (18)

You stock crank will be fine for that but you will need forged pistons and rods. Since its out why not just build a 5.7 or 6.0 for it?

jkwalkercchs

iTrader: (21)

i have a 5.3 block already

jkwalkercchs

iTrader: (21)

so how high could this thing rev up with a 3.185 crank??????
wat all is needed to run that high????
solid lifters---------good or bad

DONAIMIAN

iTrader: (18)

People have been past 7500 with hyd lifters. In the high RPM's you really have to worry about the oil system running the pan dry. Thats where and accusump comes in. Just keep in mind since this is in a truck you loose some low end grunt.

chrs1313

iTrader: (24)

1.88 rod Journal is what they use in NHRA PRO STOCK .They rev to 10500rpm.

jkwalkercchs

iTrader: (21)

Well I Have An V6 Fbody That I Locked The Motor Up In
Accusump?/

jkwalkercchs

iTrader: (21)

Well Anyone Know Roughly How Many Cubes A 3.5 Stroke And A 3.905 Bore Would Be With 57cc Heads

99mongooSS

iTrader: (4)

335-5.4l

jkwalkercchs

iTrader: (21)

nice i want to build that for my truck and shift at 6500 probly with a 200+ shot

Old SStroker

Displacement = BORE x BORE X STROKE X .7854 X number of cylinders.

That will work for any size combustion chambers. (57 cc or otherwise)