LS1 Stroker? Whipple Charger?

**chriSS396** · 05-22-2007, 04:32 PM

planning on getting a first gen camaro after college and dropping an ls1 with an eagle stroker kit, intercooled twin screw whipple charger, and ported L72's. Would it be a nice build?

**INIT2WIN** · 05-22-2007, 05:36 PM

I'd say it would be a pretty sick build. I would like to see the Dyno numbers for that one. Any idea of how much boost you want to put in it??

**chriSS396** · 05-22-2007, 06:22 PM

its gonne be my first project car so i am not planning to get the most i can get, but not the lowest either. something in the middle. is 9-12 seem decent or since im wanting to go with a twin screw should i try for more?

**INIT2WIN** · 05-23-2007, 05:03 PM

I would say if you are planning to go with that much boost I wouldn't build a stroker motor. Stroker motors tend to have high compression and that isn't a good thing for a boosted motor. I would build a forged internal stock cube motor, make the bottom end strong and run more boost. I think it would be better in the long run.

**chriSS396** · 05-25-2007, 07:48 PM

that makes sense about the compression, but dont stroker moters also wind up quicker? Im going to get forged internals period whether its stroked or not, but i dont want it to be a lame moter either. i will prolly do a cam also as well as ported L72's, but besides the cam charger and heades (as well as an obvious new exhaust) what else can i do, focusing on the engine.

**danziger** · 05-26-2007, 09:56 AM

Originally Posted by chriSS396

that makes sense about the compression, but dont stroker moters also wind up quicker? Im going to get forged internals period whether its stroked or not, but i dont want it to be a lame moter either. i will prolly do a cam also as well as ported L72's, but besides the cam charger and heades (as well as an obvious new exhaust) what else can i do, focusing on the engine.

If by "wind up" you mean build RPMs, then "no", strokers don't wind up quicker. Strokers have long rods and throws that have increased weight and apply more friction to the cylinder walls. Strokers also have higher piston speed, which can reduce maximum RPM.
Since Whipples move a lot of air, I'd go for a larger displacement via stroke, bore or both depending on budget. An iron 370 or 408 would probably be awesome with low-compression and a blower-friendly cam...

**chriSS396** · 05-26-2007, 02:27 PM

Originally Posted by danziger

If by "wind up" you mean build RPMs, then "no", strokers don't wind up quicker. Strokers have long rods and throws that have increased weight and apply more friction to the cylinder walls. Strokers also have higher piston speed, which can reduce maximum RPM.
Since Whipples move a lot of air, I'd go for a larger displacement via stroke, bore or both depending on budget. An iron 370 or 408 would probably be awesome with low-compression and a blower-friendly cam...

i was going to try and bore the block .80 over *dont konw if i wrote that right* what is wrong with keeping the ls1 block or am i a retard and there is a 370 and 408 ls type engine that i dont konw about. also, could i even consider running 12 lbs of boost and still use pump gas with 9:1 or 9.5:1 comp?

blackwagon · 05-26-2007, 03:53 PM

there is an ls2 in oz rebuilt a bit tougher with a whipple charger on it, pulls 509rwhp and sounds great.

**chriSS396** · 05-26-2007, 04:25 PM

what is oz rebuilt

blackwagon · 05-26-2007, 04:37 PM

Built in Australia-oz

-ls2 6litre stock bottom end
-317 Casting Heads
-918 valve springs
- custom turbo cam ( real baby cam)
-Head stud kit
-Comp Ratio lowered to 9.8:1
-90mm Ls2 manifold + 90mm Holley throttle body
-42Lbs Bosch injectors
-LS2 Fuel rails
-Di fillipo 1 7/8 headers + dual 3inch system
plus a whipple sc pulled 509rwhp

**chriSS396** · 05-26-2007, 07:24 PM

that sounds real sick. when i do this engine i will probobly do small things like that too but i can say that for sure i am going to get L72's ported by my lab instructor cuz he did a pair of his own and got 425+ cfm. also forged internals, cam, and whipple sc. that should push over 500 i would think.

was that oz rebuilt what kind of s/c did it have cuz if it was a true whipple s/c then there would be no need for an intake manifold cuz the charger replaces it.

blackwagon · 05-26-2007, 07:39 PM

it was built like that to drive as is with the plan of going twin turbo later but then they put a whipple on it.

**danziger** · 05-27-2007, 06:26 AM

Originally Posted by chriSS396

i was going to try and bore the block .80 over *dont konw if i wrote that right* what is wrong with keeping the ls1 block or am i a retard and there is a 370 and 408 ls type engine that i dont konw about. also, could i even consider running 12 lbs of boost and still use pump gas with 9:1 or 9.5:1 comp?

I don't think you can bore a LS1 block that much as the liners are pretty thin. There is nothing wrong with using the LS1 block, just use a lower-compression forged piston/rod set and a blower-friendly valvetrain. I would also recommend quality head-gaskets and perhaps head-studs if you are planning mucho boost.