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hoffbug
Tony Hoffer
Minnesota
(323 posts)

Registered:
10/15/2007 05:25PM

Main British Car:
Olds 215 EFI

bobweight and internal balance of stroker Aluminum V-8 engines.
Posted by: hoffbug
Date: December 28, 2009 10:15PM

What kind of bobweight you would have to get down to to internally balance a 3.4 stroke rover with a 3.7"-ish bore.. anyone?
Can this be done with steel rod and no mallory metal?

I would like to use an offset ground 4.6 crank. narrowed SBC rods, BHJ internal balance dampener and redrilled stock 215 flexplate



Edited 1 time(s). Last edit at 12/28/2009 10:27PM by hoffbug.


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: bobweight and internal balance of stroker Aluminum V-8 engines.
Posted by: roverman
Date: December 28, 2009 10:32PM

Tony, I'd measure stock stuff first.305 sbc.forged piston/pin around 440 grams.6" , 4340 rod approx 550 grams, narrowed for sbb rover jrnl. Isn't 4.6L crank internal? Might be a better way, easier f-wheel,1 pc. rear seal, ready for crank driven oil pump and better fillet potential with off-set grind. If you shop around for generic, "tungsten" ,might be less than Mallory. Is the BHJ made for sbb/rover? I use the Fluid Damper for sbc,(mod).How much hp. you gonna feed that 215 flxplt.? I'm thinkin a Rover to be stronger. What auto? roverman.



Edited 2 time(s). Last edit at 12/28/2009 10:40PM by roverman.


hoffbug
Tony Hoffer
Minnesota
(323 posts)

Registered:
10/15/2007 05:25PM

Main British Car:
Olds 215 EFI

Re: bobweight and internal balance of stroker Aluminum V-8 engines.
Posted by: hoffbug
Date: December 28, 2009 10:50PM

Im gonna be using a GM 200R4 auto trans.. So I have to use an adapter plate which I already have from KEP.. The British guys use the Stock 215 flexplate (redrilled) because the Rover plate is a 3 piece lump!
The BHJ dampener is for a Buick V-6.. its the same one D&D sells for the 215. If I ever get this thing together in my lifetime it most likely wont be over 375 horse.
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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

Re: bobweight and internal balance of stroker Aluminum V-8 engines.
Posted by: roverman
Date: December 28, 2009 11:07PM

Ok, Isn't the V6 dampener, external? I have,"early" Rover, flexplates that are 1 pc. solid w/o.,"wind sock", cut-outs(215 BU.). I like the external-solid design of Fluid Damper, to drive my 6V-71 blower. roverman.


hoffbug
Tony Hoffer
Minnesota
(323 posts)

Registered:
10/15/2007 05:25PM

Main British Car:
Olds 215 EFI

Re: bobweight and internal balance of stroker Aluminum V-8 engines.
Posted by: hoffbug
Date: December 29, 2009 07:14AM

BHJ makes both an internal and external models..


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: bobweight and internal balance of stroker Aluminum V-8 engines.
Posted by: roverman
Date: December 29, 2009 12:18PM

Elastomer/external inertia ring? Steel hub? Thanks, roverman.


hoffbug
Tony Hoffer
Minnesota
(323 posts)

Registered:
10/15/2007 05:25PM

Main British Car:
Olds 215 EFI

Re: bobweight and internal balance of stroker Aluminum V-8 engines.
Posted by: hoffbug
Date: December 29, 2009 01:44PM

Art.. They are the encapsulated elastomer type , Billet Steel Construction .... SFI 18.1 Certified...

[www.bhjdynamics.com]



Edited 1 time(s). Last edit at 12/29/2009 01:47PM by hoffbug.



NixVegaGT
Nicolas Wiederhold
Minneapolis, MN
(659 posts)

Registered:
10/16/2007 05:30AM

Main British Car:
'73 Vega GT 4.9L Rover/Buick Stroker

authors avatar
Re: bobweight and internal balance of stroker Aluminum V-8 engines.
Posted by: NixVegaGT
Date: December 29, 2009 06:36PM

Peep the "Rover" link on that page. Nice looking parts.


hoffbug
Tony Hoffer
Minnesota
(323 posts)

Registered:
10/15/2007 05:25PM

Main British Car:
Olds 215 EFI

Re: bobweight and internal balance of stroker Aluminum V-8 engines.
Posted by: hoffbug
Date: December 29, 2009 07:18PM

Yeah. Nic.. The Rover dampener has got some kind of V-belt pulley behind it though.. Might be useful to some.But I didnt think Id use it..

T/A also brands them as their own... But they are made by BHJ..



Edited 1 time(s). Last edit at 12/29/2009 07:20PM by hoffbug.


NixVegaGT
Nicolas Wiederhold
Minneapolis, MN
(659 posts)

Registered:
10/16/2007 05:30AM

Main British Car:
'73 Vega GT 4.9L Rover/Buick Stroker

authors avatar
Re: bobweight and internal balance of stroker Aluminum V-8 engines.
Posted by: NixVegaGT
Date: December 30, 2009 06:39AM

LOL> Good point. I didn't see that at first. Did you get the answer you were looking for on the no-mallory idea? Is mallory bad? I've got a bunch in my 300 crank now after balancing.


BlownMGB-V8
Jim Blackwood
9406 Gunpowder Rd., Florence, KY 41042
(6469 posts)

Registered:
10/23/2007 12:59PM

Main British Car:
1971 MGB Blown,Injected,Intercooled Buick 340/AA80E/JagIRS

authors avatar
Re: bobweight and internal balance of stroker Aluminum V-8 engines.
Posted by: BlownMGB-V8
Date: December 30, 2009 10:04AM

Interesting, I don't think I have any at all in my 340 crank.

Jim
Get Your BritishV8 T-shirt by clicking here


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: bobweight and internal balance of stroker Aluminum V-8 engines.
Posted by: roverman
Date: December 30, 2009 12:15PM

Jim, Internal balanced? Got bob weights?


hoffbug
Tony Hoffer
Minnesota
(323 posts)

Registered:
10/15/2007 05:25PM

Main British Car:
Olds 215 EFI

Re: bobweight and internal balance of stroker Aluminum V-8 engines.
Posted by: hoffbug
Date: December 30, 2009 01:11PM

Nic.. Mallory metal isn t" Bad" per say.. Its just another expense Id rather avoid.
I would like to internal balance my engine.. whenever I get around to that...


BlownMGB-V8
Jim Blackwood
9406 Gunpowder Rd., Florence, KY 41042
(6469 posts)

Registered:
10/23/2007 12:59PM

Main British Car:
1971 MGB Blown,Injected,Intercooled Buick 340/AA80E/JagIRS

authors avatar
Re: bobweight and internal balance of stroker Aluminum V-8 engines.
Posted by: BlownMGB-V8
Date: December 30, 2009 04:29PM

Art: Nah, it's external. Makes more work putting a good harmonic damper on it too, not only do I have to cut down a big chunk of steel to make an adapter, it'll have to be milled for balance.

Jim


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: bobweight and internal balance of stroker Aluminum V-8 engines.
Posted by: roverman
Date: December 30, 2009 04:47PM

Jim and clan, Tunsten "might" be cheeper than Mallory metal. They are similar in weight.



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