400 based 512ci cranks and kits
#1889593
08/11/15 05:20 PM
08/11/15 05:20 PM
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Joined: Jan 2004
Posts: 13,247 Mt. Vernon, Ohio
dartman366
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where is a good place to look into them, I have been searching for a 4.250 crank/rods/pistons for the lo deck block and the only thing I have come up with is 440 source,which I have nothing against, but I want some different options for suppliers, seems like everyone has 4.150 cranks but it stops there, eagle, scat K1, compstar etc all have the 4.150 but nothing bigger,,what am I missing?
Light travels faster than the speed of sound,,,this is why some people seem bright untill you hear them speak.
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Re: 400 based 512ci cranks and kits
[Re: Sport440]
#1889824
08/11/15 10:02 PM
08/11/15 10:02 PM
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Joined: Jan 2004
Posts: 13,247 Mt. Vernon, Ohio
dartman366
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440 source has the .4.25, 4.375, and 4.50 as well.. Are you stating no one else has anything in stock other then 4.15 right now? not as a seperate crank or a kit, as far as 440 source I am not too sure about their pistons, not a brand name as far as I know, thought they used to sell Ross, and I definately don't like their H beam rod's, have seen too many loose the bushing in the small end, looks way to thin and fragile to me and they just mash and desinegrate, I would conside their crank as long as nothing else is special to their product line, I do like the fact that their rod's are wider on the big end and the assembly has way less rod side clearance that a standard chevy rod on a mopar crank which seems to me would sling a LOT of oil and create a bigger windage problem,,,Thanks Andy I checked out Molnar and they have a crank listed.
Light travels faster than the speed of sound,,,this is why some people seem bright untill you hear them speak.
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Re: 400 based 512ci cranks and kits
[Re: AndyF]
#1889870
08/11/15 10:41 PM
08/11/15 10:41 PM
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Joined: Jan 2004
Posts: 13,247 Mt. Vernon, Ohio
dartman366
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Should be a simple kit to build yourself. 4.25 crank from Molnar, a set of 6.535 rods from most anyone and a set of 1.32 CH pistons from most anyone. Only real issue is that you need to figure out what dish/dome you need to make the compression ratio that you want. Not everyone sells a big enough dish to keep the the CR down for a pump gas motor. If it is a race motor then it is a little easier. It's a race effort, guess I need to look outside the box, I kept looking in the Mopar listings and should of been looking in the brand X listings for the rods, LOL
Light travels faster than the speed of sound,,,this is why some people seem bright untill you hear them speak.
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Re: 400 based 512ci cranks and kits
[Re: AndyF]
#1889960
08/12/15 12:28 AM
08/12/15 12:28 AM
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Joined: Jan 2004
Posts: 13,247 Mt. Vernon, Ohio
dartman366
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plan is to use the new Trick Flow heads,,when ever they are available, won't be doing anything untill sometime next year, maybe by then they will have their new max wedge head out.also the chamber cc on the TF heads are 78cc
Light travels faster than the speed of sound,,,this is why some people seem bright untill you hear them speak.
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Re: 400 based 512ci cranks and kits
[Re: dartman366]
#1890145
08/12/15 11:09 AM
08/12/15 11:09 AM
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Joined: Jan 2003
Posts: 8,028 Tulsa OK
Bad340fish
master
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master
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Tulsa OK
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My Dad just got some Molnar rods and Race Tec pistons through Molnar, nice pieces and the customer service seemed pretty good.
68 Barracuda Formula S 340
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Re: 400 based 512ci cranks and kits
[Re: DoubleD]
#1890164
08/12/15 11:32 AM
08/12/15 11:32 AM
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Joined: Jul 2010
Posts: 2,422 Pittsburgh PA
Eric
top fuel
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Your missing about 14 cubic inches - stay with the 4.15 kits easiest way to go
The Eagle kit B21103030 is balanced and uses the Mahle pistons and a 6.760 rod with the 2.2 pin
Price at Summit is $2200 with a 10% coupon = $1980
I just put Mahle's in my mill. Very nice pistons. That's basically the kit I have with the Eagle rods and crank.
5.53 @ 125 1/8th on the launch control..more left in her!
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Re: 400 based 512ci cranks and kits
[Re: dogdays]
#1890284
08/12/15 02:53 PM
08/12/15 02:53 PM
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Joined: Jan 2004
Posts: 13,247 Mt. Vernon, Ohio
dartman366
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Thanks for the info, as far as the rod bushing's that I have seen both failed and non failed the bushing thickness appears to be to thin, wall thickness wise seems un supportive,could be material could be thickness not sure, i suppose you could remove them and replace them with a known top quality bushing and all would be good, just food for thought.
Light travels faster than the speed of sound,,,this is why some people seem bright untill you hear them speak.
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Re: 400 based 512ci cranks and kits
[Re: AndyF]
#1890481
08/12/15 07:41 PM
08/12/15 07:41 PM
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Joined: Jan 2004
Posts: 13,247 Mt. Vernon, Ohio
dartman366
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The trick is to use the Chevy rods. They are made in much higher volume so you can get higher quality rods for less money. For a 512 you should be able to use a very common 6.535 rod. Another great benefit of using the Chevy rod is that then you can use Chevy rod bearings. There are a ton of those bearings available including different widths, coatings, etc.
If it was me I'd probably go with the Molnar crank, some SCAT H beam rods and the SRP pistons. That combo should fall together and make really nice power with the TF heads. Well Andy you are real close to what my list is, only diff is Eagle rod's and Ross pistons, I will look at the Scats and srp's
Light travels faster than the speed of sound,,,this is why some people seem bright untill you hear them speak.
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Re: 400 based 512ci cranks and kits
[Re: dartman366]
#1890663
08/12/15 11:41 PM
08/12/15 11:41 PM
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Joined: Jan 2003
Posts: 31,050 Oregon
AndyF
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The SRP 213453 pistons are $560 at Summit while the ICON 823 pistons are $627 and the Ross 99495 pistons are $690. I think these are apples to apples prices but you have to double check to be sure. Diamond also has a shelf piston but they sell direct so you have to call them for pricing.
I'm sure that Molnar also has a 6.535 rod and his prices are usually really good. The SCAT rods are $485 at Summit with the standard bolts which should be fine for your application. You can put together a total stroker kit for about $1900 from Summit. If your engine builder has a wholesale account with Summit then they get an additional discount.
Last edited by AndyF; 08/12/15 11:52 PM.
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Re: 400 based 512ci cranks and kits
[Re: AndyF]
#1890866
08/13/15 10:35 AM
08/13/15 10:35 AM
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Joined: Jan 2004
Posts: 13,247 Mt. Vernon, Ohio
dartman366
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once again Andy you (and others) have provided excellent info and you just verified my parts selsctions, Thank you very much,,,now its time to start building the savings account back up.
Light travels faster than the speed of sound,,,this is why some people seem bright untill you hear them speak.
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Re: 400 based 512ci cranks and kits
[Re: dartman366]
#1891843
08/14/15 02:25 PM
08/14/15 02:25 PM
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Joined: Jan 2003
Posts: 684 St. Charles, MO.
Slingshot383
mopar
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mopar
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St. Charles, MO.
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Ross pistons, GRP Chevy style rods, and crank of your choice, light and strong.
1994 Undercover Chassis 125" altered
stack injected big block, soon blown and injected
Member of The Torque and Recoil Club
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