Engine and Transmission Tech

tips, technology, tools and techniques related to vehicle driveline components

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Dan Jones
Dan Jones
St. Louis, Missouri
(280 posts)

Registered:
07/21/2008 03:32PM

Main British Car:
1980 Triumph TR8 3.5L Rover V8

Re: Lifters
Posted by: Dan Jones
Date: September 08, 2008 11:06AM

Are those solid or hydraulic rollers?

Dan Jones


WedgeWorks1
Mike Perkins
Ellicott City, Maryland
(460 posts)

Registered:
07/06/2008 08:07AM

Main British Car:
1980 Triumph TR8 3.5 Litre Rover V8

authors avatar
Re: Lifters
Posted by: WedgeWorks1
Date: September 08, 2008 09:00PM

Both Group 44 & Tim Lanocha are using solid roller lifter cams

Michael


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: Lifters
Posted by: roverman
Date: April 29, 2009 03:18PM

Part of the "problem" with this series of engines is .842" lifter dia., which limits ramp speeds for flat tappets. Other is base circle of cam is reduced approx. .12" as result of stepped cam bearings. I.E. later V6's and 350's using largest dia. all the way back. This also increases torsional strength of cam. For those wishing to sleeve lifter bores,this opens up some options. You could "carefully" weld gusset plates over lifter areas. Two-fold benefit. 1. increase strength in highly stressed areas for serious cams,(mushroom/roller). 2. Reduce oil losses directly onto crank/etc. With sleeved bores you could readily use Chevy hyd/roller lifters,(cheep), with-out oil pressure bleed-off problems. Or how bout "gutting" the internals, put top piece back-in and have a cheep/strong, mech. roller lifter with longer pushrod seated closer to roller side-trusting action,(stronger). "Maybe" I can weld up the back-four bearing areas enough for "smarter" bearings? Don't try this at home! Food for thought. Regards, roverman.


MGBV8
Carl Floyd
Kingsport, TN
(4511 posts)

Registered:
10/23/2007 11:32PM

Main British Car:
1979 MGB Buick 215

authors avatar
Re: Lifters
Posted by: MGBV8
Date: April 30, 2009 08:52PM

"With sleeved bores you could readily use Chevy hyd/roller lifters"

I like the way this guy is thinking!
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