Re: What 451 Stroker Rods?
[Re: CompSyn]
#577131
01/09/10 03:43 AM
01/09/10 03:43 AM
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Joined: Aug 2005
Posts: 4,861
Riverside, Ca
R70RUNNER
master
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master
Joined: Aug 2005
Posts: 4,861
Riverside, Ca
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Used SRP pistons and 6.76 Scat rods. in my 451. IMO it's six in one and half a dozen in the other, trading rod weight for piston/pin weight... IF I was pushing the limits of pump gas in it I'd be inclined to go with the shorter rod for the shorter dwell "near TDC" and the quicker movement away from TDC to minimize chance at detonation, would it matter? maybe maybe not  in theory that's how it would/should work.
Current cars: 2000 Dak Quad Cab, 2012 Challenger,1970 Road Runner, 1994 Firehawk
1966 Coronet post sedan, 1988 Corvette, 2005 Magnum RT all SOLD
R70RUNNER<---VP Inland Empire Chapter of the MPM
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Re: What 451 Stroker Rods?
[Re: R70RUNNER]
#577133
01/09/10 10:30 AM
01/09/10 10:30 AM
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Joined: Jan 2003
Posts: 4,978
VA
DAMOPARS
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Joined: Jan 2003
Posts: 4,978
VA
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Quote:
Used SRP pistons and 6.76 Scat rods. in my 451. IMO it's six in one and half a dozen in the other, trading rod weight for piston/pin weight... IF I was pushing the limits of pump gas in it I'd be inclined to go with the shorter rod for the shorter dwell "near TDC" and the quicker movement away from TDC to minimize chance at detonation, would it matter? maybe maybe not in theory that's how it would/should work.
SRP pistons and 6.76 scat rods here too.
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Re: What 451 Stroker Rods?
[Re: CompSyn]
#577134
01/09/10 12:12 PM
01/09/10 12:12 PM
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Joined: Nov 2004
Posts: 3,544
Syracuse,NY
CompWedgeEngines
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master
Joined: Nov 2004
Posts: 3,544
Syracuse,NY
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Its not really a big isssue on that combo either way, but I am a firm believer in using the longer compression height piston in a street combo. Much better on a street engine for piston stability. Either combo can run just fine.
RIP Monte Smith
Your work is a reflection of yourself, autograph it with quality.
WD for Diamond Pistons,Sidewinder cylinder heads, Wiseco, K1 rods and cranks,BAM lifters, Morel lifters, Molnar Technologies, Harland Sharp, Pro Gear, Cometic, King Engine Bearings and many others.
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Re: What 451 Stroker Rods?
[Re: CompWedgeEngines]
#577135
01/09/10 04:41 PM
01/09/10 04:41 PM
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Joined: Jul 2006
Posts: 4,319
Puyallup, WA
StealthWedge67
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Puyallup, WA
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I used the RB length Rod. They are more readily available in an economical H-beam design. Andy F.'s new book says that the short rod version will make slightly more low end power (???). not sure why that would be, but I'm sure Andy knows what he's talking about. Seems to me that using a shorter rod would mean a longer piston, which would negate at least some of the weight advantage the longer rod motor enjoys (???).
LemonWedge - Street heavy / Strip ready - 11.07 @ 120
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Re: What 451 Stroker Rods?
[Re: fourgearsavoy]
#577137
01/09/10 10:47 PM
01/09/10 10:47 PM
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Joined: Nov 2004
Posts: 3,544
Syracuse,NY
CompWedgeEngines
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master
Joined: Nov 2004
Posts: 3,544
Syracuse,NY
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I can vouch for the K1 rods as well. Dan (DRAM) and I were some of the first to really push the K1 parts when they first started out. Still the best bang for the buck in my opinion.
RIP Monte Smith
Your work is a reflection of yourself, autograph it with quality.
WD for Diamond Pistons,Sidewinder cylinder heads, Wiseco, K1 rods and cranks,BAM lifters, Morel lifters, Molnar Technologies, Harland Sharp, Pro Gear, Cometic, King Engine Bearings and many others.
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Re: What 451 Stroker Rods?
[Re: CompWedgeEngines]
#577138
01/13/10 07:37 AM
01/13/10 07:37 AM
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Joined: Apr 2008
Posts: 1,285
Pacific NW USA
CompSyn
OP
pro stock
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OP
pro stock
Joined: Apr 2008
Posts: 1,285
Pacific NW USA
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Quote:
Its not really a big isssue on that combo either way, but I am a firm believer in using the longer compression height piston in a street combo. Much better on a street engine for piston stability. Either combo can run just fine.
To confirm, are you saying that by using the shorter 'B' rod, you get a piston with a "longer compression height" and thus a piston that may be more stable for a street engine, correct?
Not trying to stir up controversy here. It's a 50/50 toss up for me, e.g, one KB piston/stock rod combo over the other. If one combo is better suited for an iron headed, pump-gas, mostly stock build, I'd like to find out.
I guess if I have to give in to a little extra piston side loading for a lesser chance of detonation and pick up a little extra low-to-mid range power for my B-Body, the shorter 'B' rod may be a good choice for me?
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Re: What 451 Stroker Rods?
[Re: CompSyn]
#577139
01/13/10 11:18 AM
01/13/10 11:18 AM
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Joined: Oct 2003
Posts: 21,345
Marysville, O-H-I-O
70Cuda383
Too Many Posts
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Too Many Posts
Joined: Oct 2003
Posts: 21,345
Marysville, O-H-I-O
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I used the same stroke in my 383 block for a 438 cu in motor--.060 over 383 block.
I went with the 440 stroke, 440 rods, and short pistons. makes for a light rotating assembly that revs quick especially if you use the floating .990 pins instead of the larger press fit pins.
I have no piston slap or rock in my motor even when it's cold. 4,000 street miles so far in the past 2 years, and all seems to be going well.
**Photobucket sucks**
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Re: What 451 Stroker Rods?
[Re: CompSyn]
#577140
01/13/10 11:28 AM
01/13/10 11:28 AM
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Joined: Nov 2003
Posts: 36,041
Lincoln Nebraska
RapidRobert
Circle Track
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Circle Track
Joined: Nov 2003
Posts: 36,041
Lincoln Nebraska
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My 451 coming together w KB 280's (1.327 CH) and RB rods. I am more concerned w not increasing the side loading than piston weight but I dont want piston rock to shorten my longevity somewhere down the line. I'm assuming 1.327 is not in the danger zone???
Last edited by RapidRobert; 01/13/10 11:38 AM.
live every 24 hour block of time like it's your last day on earth
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