Engine and Transmission Tech
tips, technology, tools and techniques related to vehicle driveline components
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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: rods for 215, reliable sleeves ?
Thermal expansion differential, is the biggest problem, with the RV8. Aluminum thermal expands at approx .2.5X that of iron. Sleeves don't initially leak when their cold/warm, but when HOT. The aluminum expands away from the iron sleeve at operating temperature. Any pinholes or cracks, in the aluminum bore, will automatically leak at the top of a non-flanged sleeve.This makes it logical to use Loctite 620, or equivalent, to bond the sleeve to the block. Think about it, when you bore away the strength of the aluminum bore, and use a non-flanged liner, what is left to hold the deck rigid enough, to make a reliable seal ? Woody had plenty of work getting his 4.02" bores to seal. Cheers, roverman.
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Re: rods for 215
That would be true if the liners and the aluminum were at the same temperature. There is in actuality a great deal of temperature diferential. On the iron side, you have combustion temperatures of 1000 to 1300F. On the aluminum side, you have a constant flow of 200F coolant. With .002 interference, I'll have to let you calculate the relative expansion, since it is a constant variable from cold side to hot, and my calculus is a bit rusty. Expansion rates are academic if the sleeves are properly installed. The only seal required is the bottom ledge and the fire ring at the top.
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Re: rods for 215
re: 4.0 sleeve issue
Jim, I talked to Lee at English-Swedish Spares about the problem, and he had only encountered it once. He is getting me a 4.0 block to play with. It may be a while before I get up there to pick it up. |
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Re: rods for 215
As for the original question, the 300 Buick and 225 Buick rods can be used with the 305 SBC pistons with some minor machine work to the wristpin end. Downside, they are still cast "armasteel". But they are cheap.
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mgb260 Jim Nichols Sequim,WA (2465 posts) Registered: 02/29/2008 08:29PM Main British Car: 1973 MGB roadster 260 Ford V8 |
Re: rods for 215
Larry, An even better choice is the 75-76 231 V6 capscrew rod. Same design as 75-80 350 but, 300 length.
Edited 1 time(s). Last edit at 11/03/2013 08:45PM by mgb260. |
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mgb260 Jim Nichols Sequim,WA (2465 posts) Registered: 02/29/2008 08:29PM Main British Car: 1973 MGB roadster 260 Ford V8 |
Re: rods for 215
Larry, All 75-76 Odd Fire 231. No turbo's back then.
Edited 1 time(s). Last edit at 11/05/2013 05:57AM by mgb260. |
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mgb260 Jim Nichols Sequim,WA (2465 posts) Registered: 02/29/2008 08:29PM Main British Car: 1973 MGB roadster 260 Ford V8 |
Re: rods for 215
Those rods were also early 77. Mid 77 went to even fire. The odd fire rods are available here. 6 pack and 2 singles.
[www.standardcrankshaft.com] |
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mgb260 Jim Nichols Sequim,WA (2465 posts) Registered: 02/29/2008 08:29PM Main British Car: 1973 MGB roadster 260 Ford V8 |
Re: rods for 215
Larry, Here's another rod that will work. 80-81 265 and 77-81 301 Pontiac. Same bearing as 215 and 300. Same pin as 305 Chevy. 6.051 long. Cast Armasteel like the Buick rods. You can get ARP bolts, magnaflux, resize, polish and bead blast. I've never had a problem with cast rods unless you are turning 7000 RPM or have over 500 HP. Probably around same strength as 300 rods.
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Re: rods for 215
You mentioned the 301 Pontiac rod. I discovered a box of them at the shop today. New, in the package, GM rods. For the Buick people, we have some 350 Buick crate motors. New in the GM crates that got lost in the warehouse at some point. If anyone has any interest, we can probably sell them at a really good price.
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mgb260 Jim Nichols Sequim,WA (2465 posts) Registered: 02/29/2008 08:29PM Main British Car: 1973 MGB roadster 260 Ford V8 |
Re: rods for 215
Larry, The 301 rods big end is perfect even uses the Buick/Rover bearing. The small end uses the Chevy pin same as 305. The only problem it is .050 longer so you need a shorter pin height piston than the 305. 3300 Buick V6 may work if you bush the rod or bore the piston if there is enough meat there. There may be Dodge/Chrysler ones that could work also.
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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: rods for 215
Larry M., I suggest listing those sbb crate motors with "V8Buick" site. They have a loyal 350 following.
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mgb260 Jim Nichols Sequim,WA (2465 posts) Registered: 02/29/2008 08:29PM Main British Car: 1973 MGB roadster 260 Ford V8 |
Re: rods for 215
Larry, What would be the price for 8 301 rods? They are the perfect length if used with a Buick 350 crank in 300 block with 305 Chevy .040 pistons
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Re: rods for 215
Jim, I will get you a price on a set of rods shipped to Wa. I think I am going to use a set in my engine also. I should be able to adjust stacked length by working with the piston dome.
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mgb260 Jim Nichols Sequim,WA (2465 posts) Registered: 02/29/2008 08:29PM Main British Car: 1973 MGB roadster 260 Ford V8 |
Re: rods for 215
Larry, I'm thinking for Chris's 300 stroker in B.C. if he can't find the 350 Buick capscrew rods. Build is on the other board, Mgexperience. You wouldn't have 8 of those laying around would you?
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mgb260 Jim Nichols Sequim,WA (2465 posts) Registered: 02/29/2008 08:29PM Main British Car: 1973 MGB roadster 260 Ford V8 |
Re: rods for 215
Larry, Thanks. Looks like 2.3 Ford HSC flattop piston(3.68 stock bore) has .050 lower pin height than 305. Stil would have to change pin fit.
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