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: Lotus 907/Rover V8 head swap
Uh... I hope more than one color ? Whats the worst could happen.. someone ask "how's it runnin", we reply," just look at it, it's runnin ti...s" , nevermind.
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Re: Lotus 907/Rover V8 head swap
For the cam bearing journals stiffiner, girdle, whatever yo want to call it:
Why not machine "plugs" in two pieces (one for each side to "sandwich" the cam journal, leaving a hollow in-between for oil flow) with a step to seat them and maybe a receiver groove for an o-ring. A central hole in the plugs which you could run a piece of, say, 1/2" allthread and nuts to cinch down the plugs as well as add a slight preload to add stiffness to the block. Then you wouldn't have any clearence issues with monster cranks either. Just a thought |
NixVegaGT Nicolas Wiederhold Minneapolis, MN (659 posts) Registered: 10/16/2007 05:30AM Main British Car: '73 Vega GT 4.9L Rover/Buick Stroker |
Re: Lotus 907/Rover V8 head swap
I like the concept. Do you think it's possible to get hands in there to weld the blanks? I suppose you could weld the threaded rod/nut after tightening to lock them in.
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Re: Lotus 907/Rover V8 head swap
Weld or use a jam nut to ensure that nothing comes loose.
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v8ian ian stewart just north of London, United Kingdom, Planet Earth (54 posts) Registered: 12/24/2009 04:06PM Main British Car: 67 Ford Cortina 3.9ltr Rover |
Re: Lotus 907/Rover V8 head swap
Shrinking a ally tube into the journals would 1, seal the oilways, and 2 Stiffen the block, as for big throw crank clearance, I would guess the Pan rails would have to ground to nothing before cam clearance is a probem, But theres no reason the tube could not be substituted for a solid machined bar necked for clearance of crank and also gun drilled for lightness, obviously there would have to be some sort of radial groove uut to supply oil to the mains
Edited 1 time(s). Last edit at 01/23/2010 10:01AM by v8ian. |
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: Lotus 907/Rover V8 head swap
Nic and clan, are we going to be stuck in "endless re-runs"? lol ! But seriously folks, jus read the granite tablets laid out in the-FORUM, for all to see. May the h.p. gods smile upon us. roverman.
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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: Lotus 907/Rover V8 head swap/raised deck.
Clan update, Jus' found a local waterjet co. I'm "leanin"deck plates, not neccessarily with "tractor" crank-Nic. roverman.
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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: Lotus 907/Rover V8 head swap
Na' least .75" to fully encompass the "time serts", for head studs. Of course they may be,"counterbored" to drop over perihpery of deck to accomodate desired deck height. Still on-the-bubble, regarding external studs. roverman.
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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: Lotus 907/Rover V8 head swap
Thanks Jim,. Ya see that Nic ? Are ya strokin to the beat of,"Farmer-in-the del"-Yet. That sukka def look to be wantin a "tractor-like" 3.85"= stroke ! Where is all of this goin ?? We seem to be a semi- cohesive group of mad scientist, bent on both destroying and saving the Rover/sbb and"maybe", even the Caddy, from "Dr Evil of Boring "?? When "Luke" was told to "feel-the-force", I don't think it was, Exlax ? Let's just go with the flow, in a good way. roverman.
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Re: Lotus 907/Rover V8 head swap
Wow, thanks Jim. With that picture it suddenly it makes sense. Curious, in the Rover application, would the deck plate be aluminum? And as Art alludes to, that would/could raise the deck height, enabling the 3.85" stroker. Basically, an aluminum Buick 300.
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mgb260 Jim Nichols Sequim,WA (2461 posts) Registered: 02/29/2008 08:29PM Main British Car: 1973 MGB roadster 260 Ford V8 |
Re: Lotus 907/Rover V8 head swap
If I was doing it, I would use 3/8" steel to stiffen the block, along with a girdle on the bottom.Or the thick aluminum like Paul said for a 300 height with 350 crank stroker.
Edited 1 time(s). Last edit at 01/29/2010 01:08PM by mgb260. |
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: Lotus 907/Rover V8 head swap/turmoil below deck
Clan, My first choice for block, heads, deck plates and liners is always alum. I like similar thermal growth rates when possible. Next comes the "tractor sleeve", then I'll tork-it from there, oops,take-it.roverman.
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NixVegaGT Nicolas Wiederhold Minneapolis, MN (659 posts) Registered: 10/16/2007 05:30AM Main British Car: '73 Vega GT 4.9L Rover/Buick Stroker |
Re: Lotus 907/Rover V8 head swap
OH! Ok. that makes a ton of sense. Cool! Then I can weld the T6 bores on the bottom of the deck too. That will go a long way to seal up the top real tight. I guess we'd need plates for the intake too, if using the Buick heads. For the Buick head I'd only really need 1/2". The it could be welded to the deck of the block with a 40 thou gap for better weld penetration and that brings the Rover block up to the 300 deck height of 9.5". Once they have the pattern then we could use any thickness, right?
Edited 1 time(s). Last edit at 01/29/2010 03:05PM by NixVegaGT. |
BlownMGB-V8 Jim Blackwood 9406 Gunpowder Rd., Florence, KY 41042 (6468 posts) Registered: 10/23/2007 12:59PM Main British Car: 1971 MGB Blown,Injected,Intercooled Buick 340/AA80E/JagIRS |
Re: Lotus 907/Rover V8 head swap
Might as well go with the P76 deck height if you can get a big runner P76 single plane or plates to run the EFI. Really you can make the deck anything you like going that route. Base it on your choice of stroke/rod/piston combo. 3/8 seems like a good starting point, remember the top of the cylinder gets the hottest so you don't want to go too thick. Downside, raising the deck height decreases hood clearance by more than the deck increase due to the manifold spacers.
JB |
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: Lotus 907/Rover V8 head swap
Yea Nic, If your gonna "slam" that Vega, might as well go dry-sump? Jim, is not the formula, deck height increase divided by 1.414? I'm leanin towards a "tractor sleeve", piano wire and hard blok. 2010,not so boring, roverman
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Re: Lotus 907/Rover V8 head swap
Just an FYI- The gal at TA performance tole me that the 300 deck height is 9.543" and the 231 V6 deck is 9.535"
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BlownMGB-V8 Jim Blackwood 9406 Gunpowder Rd., Florence, KY 41042 (6468 posts) Registered: 10/23/2007 12:59PM Main British Car: 1971 MGB Blown,Injected,Intercooled Buick 340/AA80E/JagIRS |
Re: Lotus 907/Rover V8 head swap
Your formula is correct Art, but if you use spacer plates to use say for instance a Rover EFI intake that doubles the distance.
JB |