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roverman
Art Gertz
Winchester, CA.
(3188 posts)

Registered:
04/24/2009 11:02AM

Main British Car:
74' Jensen Healy, 79 Huff. GT 1, 74 MGB Lotus 907,2L

RV8 billet cranks ?
Posted by: roverman
Date: March 04, 2014 02:01PM

There is a skilled U.S. billet crank manufacturer, that would consider building min. (5), at a time. Serious only, please, and no chatter about how great the oem. cranks are, and they "never" break. This is NOT an ad. Cheers, roverman.


quietone
Larry Mimbs
Tennille, Ga.
(93 posts)

Registered:
07/13/2013 04:22PM

Main British Car:
Re: RV8 billet cranks ?
Posted by: quietone
Date: March 04, 2014 06:20PM

I am a long way into this engine already, and at this point, the crank is the weakest link. HOW MUCH?


Moderator
Curtis Jacobson
Portland Oregon
(4577 posts)

Registered:
10/12/2007 02:16AM

Main British Car:
71 MGBGT, Buick 215

authors avatar
Re: RV8 billet cranks ?
Posted by: Moderator
Date: March 04, 2014 06:33PM

While you're at it, maybe you should consider single plane? They're available in England.
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Rotus8guy
John Bowman
West Fork, AR
(18 posts)

Registered:
05/09/2013 08:10AM

Main British Car:
Rotus Seven Olds/Buick 292

Re: RV8 billet cranks ?
Posted by: Rotus8guy
Date: March 04, 2014 06:47PM

Like Larry said $? And what specs? Must all 5+ be identical stroke, bearing size, etc?


roverman
Art Gertz
Winchester, CA.
(3188 posts)

Registered:
04/24/2009 11:02AM

Main British Car:
74' Jensen Healy, 79 Huff. GT 1, 74 MGB Lotus 907,2L

Re: RV8 billet cranks ?
Posted by: roverman
Date: March 04, 2014 07:28PM

IMHO,using 2.5" mains and 2.0/2.1" rods, to be a good plan. Using available rods,also good. Being billet, I'm pretty sure strokes will be "open". Of course the sbb folks will want 3." mains, and giant strokes. I'm sending a crank drawing, for bid puposes. Too early to fish with prices. Anyone can get a one-off billet crank made for 2,600-$2,800, if you don't mind waiting 8 weeks minimum ? This scenario, is to improve that situation. TBC, roverman.


quietone
Larry Mimbs
Tennille, Ga.
(93 posts)

Registered:
07/13/2013 04:22PM

Main British Car:
Re: RV8 billet cranks ?
Posted by: quietone
Date: March 05, 2014 05:46PM

My understanding of single plane cranks in a V8 is that they shake pretty bad. Anyone had that experience?


DiDueColpi
Fred Key
West coast - Canada
(1365 posts)

Registered:
05/14/2010 03:06AM

Main British Car:
I really thought that I'd be an action figure by now!

authors avatar
Re: RV8 billet cranks ?
Posted by: DiDueColpi
Date: March 05, 2014 06:16PM

Hey Larry,
I have a 78 308 GTS.
It does vibrate/resonate at various rpm's.
But nothing that would be found to be objectionable.
It is a pretty short stroke engine so that needs to be taken into account.

Art,
I'd be in on a large journal crank.
Something in the 75mm stroke range.

Fred



minorv8
Jukka Harkola

(269 posts)

Registered:
04/08/2009 06:50AM

Main British Car:
Morris Minor Rover V8

Re: RV8 billet cranks ?
Posted by: minorv8
Date: March 05, 2014 11:37PM

If you take the flat plane route remember to add another grand for the matching cam.


roverman
Art Gertz
Winchester, CA.
(3188 posts)

Registered:
04/24/2009 11:02AM

Main British Car:
74' Jensen Healy, 79 Huff. GT 1, 74 MGB Lotus 907,2L

Re: RV8 billet cranks ?
Posted by: roverman
Date: March 06, 2014 12:28PM

Fred, When you say LARGE journal, really 3.0" ?? 75mm = 2.953". Sounds like a "spec 32v. engine"? Jukka, I suspect most folks will want 3.4"+ strokes ? A 180 crank, with a large stroke, will prove problematic/impossible for one wearing dentures. If you "need" a roller cam for a 180 crank build, I have the blanks. Likely to be 500-$600. US. Let's talk journal sizes, long vs short snout, and strokes. Onward, roverman.



Edited 1 time(s). Last edit at 03/06/2014 02:07PM by roverman.


DiDueColpi
Fred Key
West coast - Canada
(1365 posts)

Registered:
05/14/2010 03:06AM

Main British Car:
I really thought that I'd be an action figure by now!

authors avatar
Re: RV8 billet cranks ?
Posted by: DiDueColpi
Date: March 06, 2014 04:09PM

The large journal Rover engine 63.5mm/2.5'' Art.
55.5mm/2.185" crankpin, long nose, and 180' flat plane.

Cheers
Fred


roverman
Art Gertz
Winchester, CA.
(3188 posts)

Registered:
04/24/2009 11:02AM

Main British Car:
74' Jensen Healy, 79 Huff. GT 1, 74 MGB Lotus 907,2L

Re: RV8 billet cranks ?
Posted by: roverman
Date: March 06, 2014 07:52PM

This would make a sweet motor for JH roadster or GT, eh Fred ? + easy to get camzzzzzzzzzzzz
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DiDueColpi
Fred Key
West coast - Canada
(1365 posts)

Registered:
05/14/2010 03:06AM

Main British Car:
I really thought that I'd be an action figure by now!

authors avatar
Re: RV8 billet cranks ?
Posted by: DiDueColpi
Date: March 06, 2014 08:14PM

Would get the Lo-ver motor finished.
Finally.


roverman
Art Gertz
Winchester, CA.
(3188 posts)

Registered:
04/24/2009 11:02AM

Main British Car:
74' Jensen Healy, 79 Huff. GT 1, 74 MGB Lotus 907,2L

Re: RV8 billet cranks ?
Posted by: roverman
Date: March 07, 2014 12:12PM

Got girdle, to handle all that shakin ?


quietone
Larry Mimbs
Tennille, Ga.
(93 posts)

Registered:
07/13/2013 04:22PM

Main British Car:
Re: RV8 billet cranks ?
Posted by: quietone
Date: March 07, 2014 06:21PM

Maybe you should call this the JLL crank. (Jerry Lee Lewis)


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