Molnar small block crankshafts
#3267082
10/29/24 01:58 PM
10/29/24 01:58 PM
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Joined: Apr 2007
Posts: 1,402
CA.
RAY1969CARS
OP
pro stock
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OP
pro stock
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hi guys, I’ve heard a lot of talk about these cranks. How much power can they handle? How much RPM are you pushing them to?
I’m planning on a 3.79 2.100 rod 6 inch Carrillo H beam rods 4.185 bore. 9” deck. i got 1.7 1.75 rockers Old craftsman w8s Bullet cam yet to made So I have no idea how much it will spin to or power.
crank ,pistons and cam parts i need I have no idea about compression yet. i’m thinking 12.1 to 13
Last edited by RAY1969CARS; 10/29/24 02:16 PM.
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Re: Molnar small block crankshafts
[Re: scottb]
#3267105
10/29/24 05:21 PM
10/29/24 05:21 PM
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Joined: Dec 2003
Posts: 23,409
Here
jcc
If you can't dazzle em with diamonds..
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If you can't dazzle em with diamonds..
Joined: Dec 2003
Posts: 23,409
Here
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Maybe he went this direction?  I have both heights of the A8, think is the tall version
"When one’s appeal is emotional, it does not matter if there is no substance."
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Re: Molnar small block crankshafts
[Re: jcc]
#3267111
10/29/24 06:00 PM
10/29/24 06:00 PM
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Joined: Mar 2003
Posts: 2,554
PA
moparacer
master
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master
Joined: Mar 2003
Posts: 2,554
PA
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12-13:1 with a W8? should add about 2 points to that....
I haven't used the small block s but the Molnar crank in my BB has survived years of beating at 850 hp.
67 Barracuda street/bracket car 11.27-119
68 Dart 502 BB 5.46-125
414 cid SB Dragster 7.65-174
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Re: Molnar small block crankshafts
[Re: RAY1969CARS]
#3267119
10/29/24 06:43 PM
10/29/24 06:43 PM
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Joined: Jan 2003
Posts: 6,184
Melbourne , Australia
LA360
master
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master
Joined: Jan 2003
Posts: 6,184
Melbourne , Australia
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hi guys, I’ve heard a lot of talk about these cranks. How much power can they handle? How much RPM are you pushing them to?
I’m planning on a 3.79 2.100 rod 6 inch Carrillo H beam rods 4.185 bore. 9” deck. i got 1.7 1.75 rockers Old craftsman w8s Bullet cam yet to made So I have no idea how much it will spin to or power.
crank ,pistons and cam parts i need I have no idea about compression yet. i’m thinking 12.1 to 13 You're not going to break one. Tom Molnar is a pretty switched on guy, he was the head engineer at Oliver for a number of years, before going out on his own.
Alan Jones
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Re: Molnar small block crankshafts
[Re: LA360]
#3267129
10/29/24 08:00 PM
10/29/24 08:00 PM
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Joined: Apr 2007
Posts: 1,402
CA.
RAY1969CARS
OP
pro stock
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OP
pro stock
Joined: Apr 2007
Posts: 1,402
CA.
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hi guys, I’ve heard a lot of talk about these cranks. How much power can they handle? How much RPM are you pushing them to?
I’m planning on a 3.79 2.100 rod 6 inch Carrillo H beam rods 4.185 bore. 9” deck. i got 1.7 1.75 rockers Old craftsman w8s Bullet cam yet to made So I have no idea how much it will spin to or power.
crank ,pistons and cam parts i need I have no idea about compression yet. i’m thinking 12.1 to 13 You're not going to break one. Tom Molnar is a pretty switched on guy, he was the head engineer at Oliver for a number of years, before going out on his own. A lot of people are saying good things. I think that may be my route.
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Re: Molnar small block crankshafts
[Re: RAY1969CARS]
#3267134
10/29/24 08:59 PM
10/29/24 08:59 PM
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Joined: Mar 2006
Posts: 10,027
MI, usa
dvw
I Live Here
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I Live Here
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Posts: 10,027
MI, usa
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I spin my 4.50" stroke Molnar BB crank to 7100 every pass with
4.530" pistons hanging off them. Makes enough power to dip into the 8s@3450lbs. Tom builds nice parts. Every spec was .0000 to spec. Rods are nice as well.
Doug
Last edited by dvw; 10/29/24 09:00 PM.
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Re: Molnar small block crankshafts
[Re: dvw]
#3267137
10/29/24 09:06 PM
10/29/24 09:06 PM
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Joined: Apr 2007
Posts: 1,402
CA.
RAY1969CARS
OP
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I spin my 4.50" stroke Molnar BB crank to 7100 every pass with
4.530" pistons hanging off them. Makes enough power to dip into the 8s@3450lbs. Tom builds nice parts. Every spec was .0000 to spec. Rods are nice as well.
Doug Hell, yes, see that’s what I wanna hear
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Re: Molnar small block crankshafts
[Re: RAY1969CARS]
#3267157
10/29/24 11:20 PM
10/29/24 11:20 PM
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Joined: Jan 2003
Posts: 11,798
Portage,michigan
B3422W5
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I Live Here
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Portage,michigan
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At the end of the day, Molnar, Scat, Eagle etc are Chinese forgings machined here.
All good stuff that can take a lot of abuse.
Molnar stuff, in particular, seems to have a very good reputation.
69 Dart GTS A4 Silver All steel, flat factory hood, 3360race weight
418 BPE factory replacement headed stroker, 565 lift solid cam, footbrake street/strip car
1.41 best 60 foot
6.54 @ 105.20
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Re: Molnar small block crankshafts
[Re: B3422W5]
#3267159
10/29/24 11:24 PM
10/29/24 11:24 PM
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Joined: Apr 2007
Posts: 1,402
CA.
RAY1969CARS
OP
pro stock
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OP
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At the end of the day, Molnar, Scat, Eagle etc are Chinese forgings machined here.
All good stuff that can take a lot of abuse.
Molnar stuff, in particular, seems to have a very good reputation. completely understood just trying to get a track record Again, I know there’s no guarantees, but I’m not all out effort 700 Hopefully to 8 I would say Spinning to at least 8. that’ll be a hand full for me
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Re: Molnar small block crankshafts
[Re: RAY1969CARS]
#3267164
10/30/24 12:12 AM
10/30/24 12:12 AM
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Joined: Jan 2003
Posts: 11,798
Portage,michigan
B3422W5
I Live Here
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I Live Here
Joined: Jan 2003
Posts: 11,798
Portage,michigan
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At the end of the day, Molnar, Scat, Eagle etc are Chinese forgings machined here.
All good stuff that can take a lot of abuse.
Molnar stuff, in particular, seems to have a very good reputation. completely understood just trying to get a track record Again, I know there’s no guarantees, but I’m not all out effort 700 Hopefully to 8 I would say Spinning to at least 8. that’ll be a hand full for me Molnar offers a nice fully balanced kit complete.
69 Dart GTS A4 Silver All steel, flat factory hood, 3360race weight
418 BPE factory replacement headed stroker, 565 lift solid cam, footbrake street/strip car
1.41 best 60 foot
6.54 @ 105.20
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Re: Molnar small block crankshafts
[Re: B3422W5]
#3267184
10/30/24 08:06 AM
10/30/24 08:06 AM
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Joined: Dec 2013
Posts: 4,831
Wichita
GY3
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master
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Wichita
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Not quite what you're looking for, but we have a 4.25 stroke BB crank. We were one of the first ones to buy Molnar back in 2016. We also have his 7.1" rods.
We are pushing a heavy car down the track and the numbers show well over 800 crank HP. Zero issues.
Tom is a great guy. Yes, he actually answered the phone when I had questions about rod side clearances!
He worked at Oliver, owned and then sold K1 and started Molnar. His stuff is NOT the same as anyone else's. Some buy the same cheap rods and put their name on them but his stuff is completely different.
I am the poster child for abusing parts. Lots of dragstrip passes, street miles and nitrous. I would always recommend Molnar.
'63 Dodge 330
11.19 @ 121 mph
Pump gas, n/a, through the mufflers on street tires with 3.54's. 3,600 lbs.
9.92 @ 135mph with a 350 shot of nitrous and 93 octane pump. 1.43 60 ft. 3,750 lbs.
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Re: Molnar small block crankshafts
[Re: GY3]
#3267243
10/30/24 01:47 PM
10/30/24 01:47 PM
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Joined: Apr 2007
Posts: 1,402
CA.
RAY1969CARS
OP
pro stock
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OP
pro stock
Joined: Apr 2007
Posts: 1,402
CA.
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Not quite what you're looking for, but we have a 4.25 stroke BB crank. We were one of the first ones to buy Molnar back in 2016. We also have his 7.1" rods.
We are pushing a heavy car down the track and the numbers show well over 800 crank HP. Zero issues.
Tom is a great guy. Yes, he actually answered the phone when I had questions about rod side clearances!
He worked at Oliver, owned and then sold K1 and started Molnar. His stuff is NOT the same as anyone else's. Some buy the same cheap rods and put their name on them but his stuff is completely different.
I am the poster child for abusing parts. Lots of dragstrip passes, street miles and nitrous. I would always recommend Molnar. thank you for your input. I know I should be going with one of the American brands, but my pocketbook just does not allow it right now.
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