Re: 5 GRAM DIFFERENCE ON ROD WEIGHTS?!?!
[Re: Labratt]
#1198621
03/17/12 09:16 PM
03/17/12 09:16 PM
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Joined: Jun 2003
Posts: 52,972 Romeo MI
MR_P_BODY
Master
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Master
Joined: Jun 2003
Posts: 52,972
Romeo MI
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I get them closer than 1 gram EDIT since its a external balance balancer ...yes it should be balanced with it
Last edited by MR_P_BODY; 03/17/12 09:19 PM.
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Re: 5 GRAM DIFFERENCE ON ROD WEIGHTS?!?!
[Re: Labratt]
#1198627
03/18/12 12:31 AM
03/18/12 12:31 AM
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Joined: Aug 2003
Posts: 2,401 Tucson, Arizona
MRMOPAR
top fuel
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top fuel
Joined: Aug 2003
Posts: 2,401
Tucson, Arizona
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My K1 rods (6.535 x 2.20) were within +- 0.5 gram as delivered. Thanks Dan at Performance Only for the rods and 4.15 K1 crank...
68 RR 528" INDY MAXX
07 2500 CTD
Southwest International Raceway - IHRA - Tucson, AZ
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Re: 5 GRAM DIFFERENCE ON ROD WEIGHTS?!?!
[Re: Labratt]
#1198628
03/18/12 02:56 AM
03/18/12 02:56 AM
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Joined: Jan 2003
Posts: 16,376
dogdays
I Live Here
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I Live Here
Joined: Jan 2003
Posts: 16,376
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You're getting confused by two different situations. When the assembly is balanced your machinist will weigh everything and correct any differences. But a small difference in rod or piston weight is not the reason to balance with harmonic damper and flywheel. The reason to balance with the entire rotating assembly is because it gives better results, closer to "perfect". This is true even for an internally balanced engine. Sounds to me that your machinist is pretty good and trying to do a good job for you. R.
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Re: 5 GRAM DIFFERENCE ON ROD WEIGHTS?!?!
[Re: Labratt]
#1198632
03/18/12 06:12 PM
03/18/12 06:12 PM
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Joined: Dec 2009
Posts: 20,662 in a cattle trailer down by th...
Guitar Jones
Paddle faster! I hear banjo music!
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Paddle faster! I hear banjo music!
Joined: Dec 2009
Posts: 20,662
in a cattle trailer down by th...
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I had to get two replacement Eagle H beams to make a set again. I gave them the numbers off the weight card but the rods I got were 10 grams heavier on the big end than the old ones. I bought these things about 12 years ago so returning them wasn't an option and if you've ever seen these rods you know you really can't take anyweight off them. My machinist suggested to just add the 10 grams to the bob weight on one journal and install those two rods on the same journal. He says he's done it before without a problem and everything balances OK. So that's what I did.
"Follow me the wise man said, but he walked behind"
'92 D250 Club Cab CTD, 47RH conversion, pump tweaks, injectors, rear disc and hydroboost conversion. '74 W200 Crew Cab 360, NV4500, D44, D60 and NP205 divorced transfer case. Rear disc and hydroboost conversion. 2019 1500 Long Horn Crew Cab 4WD, 5.7 Hemi.
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Re: 5 GRAM DIFFERENCE ON ROD WEIGHTS?!?!
[Re: Labratt]
#1198634
03/19/12 02:00 AM
03/19/12 02:00 AM
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Joined: Jan 2003
Posts: 75,088 A Banana Republic near you.
JohnRR
I Win
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I Win
Joined: Jan 2003
Posts: 75,088
A Banana Republic near you.
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Quote:
BTW...it is a FORGED factory crank..so it's an internally balanced engine from the factory.
And that's the way it should be when your machinist is done . If he wants the balancer to confirm that is it truly neutral then that is one thing but if he is planning to balance the crank with it attached to the crank then that is something I would be questioning no matter who the builder is.
As far as the rods being out 5 grams , NOW you know why you got a GOOD DEAL on them .
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