Re: best RB 4.15 crank for the money?
[Re: AndyF]
#2723501
12/12/19 04:53 PM
12/12/19 04:53 PM
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Joined: May 2009
Posts: 831 Missouri
galen
super stock
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super stock
Joined: May 2009
Posts: 831
Missouri
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On my second Molnar crank and rods. 1st was a 3.91 with chevy journals and 6.7 rods B block.. Second is RB 4.5 with 7.1 rods. Machine work was spot on on both. Also the Molnar rods came standard with ARP 2000 bolts.
Last edited by galen; 12/12/19 04:54 PM.
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Re: best RB 4.15 crank for the money?
[Re: dvw]
#2723506
12/12/19 05:09 PM
12/12/19 05:09 PM
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Joined: Jan 2003
Posts: 13,363 Marion, South Carolina [><]
an8sec70cuda
I Live Here
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I Live Here
Joined: Jan 2003
Posts: 13,363
Marion, South Carolina [><]
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I wouldn't hesitate for a second to use Molnar's products.
CHIP '70 hemicuda, 575" Hemi, 727, Dana 60 '69 road runner, 440-6, 18 spline 4 speed, Dana 60 '71 Demon, 340, low gear 904, 8.75 '73 Chrysler New Yorker, 440, 727, 8.75 '90 Chevy 454SS Silverado, 476" BBC, TH400, 14 bolt '06 GMC 2500HD LBZ Duramax
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Re: best RB 4.15 crank for the money?
[Re: an8sec70cuda]
#2723509
12/12/19 05:18 PM
12/12/19 05:18 PM
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Joined: Nov 2006
Posts: 2,255 IL
furious70
top fuel
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top fuel
Joined: Nov 2006
Posts: 2,255
IL
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I have an RB 4.15 2.375 Eagle crank from around 2006-07 still in a box on the shelf, how would it compare?
70 Sport Fury 68 Charger 69 Coronet 72 RR
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Re: best RB 4.15 crank for the money?
[Re: furious70]
#2723548
12/12/19 07:39 PM
12/12/19 07:39 PM
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Joined: Jan 2003
Posts: 15,439 Val-haul-ass... eventually
BradH
Taking time off to work on my car
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Taking time off to work on my car
Joined: Jan 2003
Posts: 15,439
Val-haul-ass... eventually
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I have an RB 4.15 2.375 Eagle crank from around 2006-07 still in a box on the shelf, how would it compare? As the owner of 2 Eagle cranks, I'd say yours should be checked for taper in the crank & rod journals and whether the snout where the damper fits is undersized.
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Re: best RB 4.15 crank for the money?
[Re: chrisf]
#2723567
12/12/19 08:50 PM
12/12/19 08:50 PM
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Joined: Aug 2003
Posts: 43,163 Bend,OR USA
Cab_Burge
I Win
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I Win
Joined: Aug 2003
Posts: 43,163
Bend,OR USA
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Call 440 Source and see how much their cranks are now Why are you choosing that stroke instead of 4.250 stroke with the 2.200 rod journal sizes?
Last edited by Cab_Burge; 12/12/19 08:51 PM.
Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)
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Re: best RB 4.15 crank for the money?
[Re: Cab_Burge]
#2723619
12/13/19 01:10 AM
12/13/19 01:10 AM
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Joined: Dec 2013
Posts: 4,672 Wichita
GY3
master
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master
Joined: Dec 2013
Posts: 4,672
Wichita
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I'm a huge fan of Molnar. Tom AND his parts. I've beat the crap out of his rods and crank and no issues.
'63 Dodge 330 11.19 @ 121 mph Pump gas, n/a, through the mufflers on street tires with 3.54's. 3,600 lbs. 10.01 @ 133mph with a 250 shot of nitrous an a splash of race gas. 1.36 60 ft. 3,700 lbs.
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Re: best RB 4.15 crank for the money?
[Re: BradH]
#2723702
12/13/19 12:10 PM
12/13/19 12:10 PM
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Joined: Jan 2003
Posts: 1,807 North Dakota
Azzkikrcuda
top fuel
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top fuel
Joined: Jan 2003
Posts: 1,807
North Dakota
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The 4.250 stroke 2.20 rod combo required no grinding in my RB block. I wouldn't bother with a 4.15 crank when you can get the 4.25 cranks for the same money and most likely not have any grinding to do. For the brand I have used 440 source, Molnar and Eagle and I have had no issues with any of them. Make sure you check them or have them checked by a machinist. I would buy who ever has the best price.
The only Carbs I care about are under the hood!
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Re: best RB 4.15 crank for the money?
[Re: birdtracker]
#2723740
12/13/19 01:52 PM
12/13/19 01:52 PM
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Joined: Jan 2003
Posts: 15,439 Val-haul-ass... eventually
BradH
Taking time off to work on my car
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Taking time off to work on my car
Joined: Jan 2003
Posts: 15,439
Val-haul-ass... eventually
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I bought a 4.25 crank from them. It was extremely spot on. Birdtracker Good to hear. There's been a lot of bad-mouthing of OC's products on SpeedTalk over the years that left me w/ the concern that their cranks can be seriously hit-or-miss on machining accuracy.
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