LS3 with 6.200 rods?

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Mar 11, 2014 | 11:34 PM

TurboAv

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From: Tonopah, AZ

LS3 with 6.200 rods?

I snapped the timing chain in my LS3 and now I'm finally going forged. Of all the things to break on the stock bottom end, I didn't expect it to be that. My engine builder recommended doing a 6.200" rod. Are there any other folks here running that rod on a stock stroke? Livernois stage 3 LSA heads going on top with hollow stem intake valves and inconel exhaust valves. 227/243 .619/.600 115+4 Lunati cam. Ti trim Vortech head unit running 10% overdriven.

The build:

Race Tec 4.07 -4cc Pistons w/ tool steel pins
Total Seal AP rings(steel top, napier 2nd)
Molnar 6.200" Rods
ACL Rod Bearings
ACL Main Bearings
Durabond Cam Bearings
Bore
Deck
Balance
Assemble

Mar 12, 2014 | 08:42 AM

KCS

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From: Conroe, TX

As long as the compression height of the piston is meant for that rod length, I don't really see a problem. Should be fine.

Mar 12, 2014 | 08:59 AM

LivernoisMotorsports

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From: Dearborn Heights, MI

It will be fine, it gives you a C.D. of 1.229" with a 9.240" deck@0

Mar 12, 2014 | 09:53 AM

TurboAv

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From: Tonopah, AZ

The pistons are being built for that rod length.

Mar 12, 2014 | 10:35 PM

Bout'ItZ28

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From: Houston TX

why not just run a 6.300 rod and use an off the shelf 4 inch stroke piston from any manufacturer. cheaper and get parts faster. unless its some type of purpose build

Mar 13, 2014 | 03:28 AM

TurboAv

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From: Tonopah, AZ

The 6.200" Molnar rods are only $569 and the pistons are $730. I thought you could only get the 6.300" in something fancy like the Callies I-beam or Oliver? Randy at Racetec said he would rather modify a stock stroke piston for my needs rather than modify a 4" stroke piston. It will only take a couple of weeks to get the pistons. From what my machine shop told me they average about 2-3 weeks on custom piston orders. I'll probably still be waiting on Vortech to get my blower back to me from the Ti upgrade even after the motor is done.