Ls1/Ls2 pistons & rods for SB mopar stroker? Maybe?
#616370
02/17/10 10:15 PM
02/17/10 10:15 PM
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Weddington, N.C.
Streetwize
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Just thinking out loud after doing some research in the silvolite catalog....An LS1 with a 1mm overbore is 3.937, an Ls2 is a standard 4" bore, both come with a 927 piston pin so they'll fit any standard SBC rod. The zo6 slug is a floater and the std LS1 is pressed. So i'm wondering how tough would it be to eyebrow a factory flat top to mate to a mopar chamber? I believe the factory replacement slugs are non eyebrowed flat tops. the reason I'm asking is the factory compression height is 1.335" so doing some math with a 6.125/2.100 rod you could fit a 4.25" crank pretty easily with the mopars 9.60-ish deck....so that's a 414 inch 318 and a 429 inch 360. Haven't worked the math with a 6.25" rod but there's no doubt other combos that would work in thoery anyway. What's better is the Ls1 uses a pretty slick short slipper piston design and low friction ring pack and they seem to hold up to some pretty serious nitrous blasts...even in some semi-skilled (from what I've witnessed) tuners hands. Again just wondering out loud here, a lot of mopar stroker guys are already using chevy rods so...The first BBM stroker I ever built (many moons ago) used 454 truck pistons  I've got a couple Chevy buds and the LS stuff is pretty slick...i've got a tweaked 425-ish hp Ls2 Trailblazer SS 'tow truck/Mamas SUV) btw....
Last edited by Streetwize; 02/17/10 10:20 PM.
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Re: Ls1/Ls2 pistons & rods for SB mopar stroker? Maybe?
[Re: 5spdcuda]
#616372
02/17/10 10:43 PM
02/17/10 10:43 PM
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Weddington, N.C.
Streetwize
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I've seen slugs anywhere from 3.9 to 4.100 with compression heights as small as 1.12"....everybody mskes them and some have "generic" eyebrows that might even work OOTB. Check around....type in Ls1 pistons....you'll see wiseco, SRP, Mahle, Diamond...the gangs all here, lol. I like the ring pack and the low friction skirt. .015 in the hole I would take off the deck of the block or use the .024" MP white gasket that DRAM turned me on to for perfect quench  Standard rod in 6.100 but i think you can get up to a 6.300 in a 2.100 journal so the sky's the limit. I'm tempted to fit one up just to see....i'm known to do crazy science projects like that....  the parts are easy enough to get, just need a good K1 crank to play with.
Last edited by Streetwize; 02/17/10 10:45 PM.
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Re: Ls1/Ls2 pistons & rods for SB mopar stroker? Maybe?
[Re: DemonDust]
#616374
02/17/10 10:52 PM
02/17/10 10:52 PM
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Weddington, N.C.
Streetwize
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Yeah, probably....but i've seen some with a generic "unibrow"  that might actually work or need a quick trim to fit. LS1's aren't canted (to my knowledge) the chambers look a lot like "our" stuff, lol. Better quit before I start "Cathedral Porting" an old set of J's in the corner, lol!!
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Re: Ls1/Ls2 pistons & rods for SB mopar stroker? Maybe?
[Re: 5spdcuda]
#616376
02/17/10 10:57 PM
02/17/10 10:57 PM
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Weddington, N.C.
Streetwize
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They make a 6.200 too ya know  the aftermarket has a ton of different compression height slugs too....for reference the Ls block is a 9.24" deck height.
Last edited by Streetwize; 02/17/10 10:59 PM.
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Re: Ls1/Ls2 pistons & rods for SB mopar stroker? Maybe?
[Re: Streetwize]
#616377
02/18/10 02:10 AM
02/18/10 02:10 AM
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Joined: Feb 2005
Posts: 5,207
Menomonee Falls
DemonDust
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I have 3 sets of Carrillo 6.200 rods here 2 are honda journals 1 is IRL Not sure how exotic you want to get but you could get a crank made with Honda journals and you could run lightweight rods that cost you around $3-400, if you get lucky you could get them even cheaper. I think the cost either way would be a wash. Going with the Honda or IRL journals will save alot of weight plus you are already talking very minimal CH. I don't think it'd be unreasonable to say you could have a 4.125 stroke and only have 1400-1450 BW. 
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Re: Ls1/Ls2 pistons & rods for SB mopar stroker? Maybe?
[Re: Streetwize]
#616378
02/18/10 04:04 AM
02/18/10 04:04 AM
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Joined: Jun 2005
Posts: 793
Utah
topbrent
super stock
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super stock
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Utah
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Quote:
LS1's aren't canted (to my knowledge) the chambers look a lot like "our" stuff, lol.
LS motors are a 15° wedge head design.
I wish sometimes someone made motor mounts and headers that would allow for fitting a LSx in a mopar.... 
Whoops!...did I just write that?....yup....
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Re: Ls1/Ls2 pistons & rods for SB mopar stroker? Maybe?
[Re: Streetwize]
#616379
02/18/10 08:49 AM
02/18/10 08:49 AM
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Posts: 52,972
Romeo MI
MR_P_BODY
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Master
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Romeo MI
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Quote:
Just thinking out loud after doing some research in the silvolite catalog....An LS1 with a 1mm overbore is 3.937, an Ls2 is a standard 4" bore, both come with a 927 piston pin so they'll fit any standard SBC rod. The zo6 slug is a floater and the std LS1 is pressed. So i'm wondering how tough would it be to eyebrow a factory flat top to mate to a mopar chamber? I believe the factory replacement slugs are non eyebrowed flat tops.
the reason I'm asking is the factory compression height is 1.335" so doing some math with a 6.125/2.100 rod you could fit a 4.25" crank pretty easily with the mopars 9.60-ish deck....so that's a 414 inch 318 and a 429 inch 360. Haven't worked the math with a 6.25" rod but there's no doubt other combos that would work in thoery anyway. What's better is the Ls1 uses a pretty slick short slipper piston design and low friction ring pack and they seem to hold up to some pretty serious nitrous blasts...even in some semi-skilled (from what I've witnessed) tuners hands.
Again just wondering out loud here, a lot of mopar stroker guys are already using chevy rods so...The first BBM stroker I ever built (many moons ago) used 454 truck pistons
I've got a couple Chevy buds and the LS stuff is pretty slick...i've got a tweaked 425-ish hp Ls2 Trailblazer SS 'tow truck/Mamas SUV) btw....
Might be a problem with most A-engine deck heights
are in the 9.585 range and if you want it trued up
you might have some issues.... just thinking
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Re: Ls1/Ls2 pistons & rods for SB mopar stroker? Maybe?
[Re: MR_P_BODY]
#616380
02/18/10 09:40 AM
02/18/10 09:40 AM
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Joined: Jul 2003
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Cleveland
sunroofgtx
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I Live Here
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Cleveland
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Wise, pm Discoquik. HE is the GURU over at Wiseco. He has really taken their program to new heights. How are you?
Join the quickest team in motorsports. Team FireCore. CustomWiresets.com
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Re: Ls1/Ls2 pistons & rods for SB mopar stroker? Maybe?
[Re: sunroofgtx]
#616381
02/18/10 11:13 AM
02/18/10 11:13 AM
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Joined: Jan 2003
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Weddington, N.C.
Streetwize
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Thanks Rich!
Doing great, I hope you are too!
It'd be cool to get a prototype set of LS1 pistons (same basic slug) made in a Mopar siamese eyebrow arrangement. (The typical LS1 is a non siamese IEIEIEIE arrangement like a ford). But a 'unibrow' might work off the shelf so long as the cam's not a really high lift.
The 1.335 ch 'works' (on paper pretty close) with a 6.25 rod and a 4" stroke, or a 6.2" with a 4.125" stroke....or a 6.125" rod and a 4.25" stoke, Mr P I agree with your square decking often being 9.585 but many/most virign blocks I've seen are at or slightly over 'blueprint' 9.600. Close enough to consider (or make up with) a thicker MLS type Head gasket if the deck was a hair short.
The other 'cool coincidence' is how close the LS1 bore is to the 318 and the Ls2 is to the 360...
Last edited by Streetwize; 02/18/10 11:18 AM.
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