Engine and Transmission Tech

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

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RallyTime38
Jonathan Olschewski

(5 posts)

Registered:
07/21/2021 01:45PM

Main British Car:


Re: 4.5/4.9 Cadillac V8
Posted by: RallyTime38
Date: July 25, 2021 10:56PM

Roverman,

Are those cam blanks for a Cadillac?


mgb260
Jim Nichols
Sequim,WA
(2277 posts)

Registered:
02/29/2008 08:29PM

Main British Car:
1973 MGB roadster 260 Ford V8

Re: 4.5/4.9 Cadillac V8
Posted by: mgb260
Date: July 26, 2021 01:16PM

Roverman has Rover blanks but, that is what you need for Fred's suggestion. Delta Cams may be able to modify and swap around the distributor gear if you send them the blank with a Caddy stock cam. They do a high performance regrind for the Caddy cam based on the Ford E cam specs for the Fiero guys.



Edited 1 time(s). Last edit at 07/26/2021 02:33PM by mgb260.


roverman
Art Gertz
Winchester, CA.
(3178 posts)

Registered:
04/24/2009 11:02AM

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

Re: 4.5/4.9 Cadillac V8
Posted by: roverman
Date: July 26, 2021 07:13PM

Just so I understand, why 215 heads on a cast iron caddy block ? Anyone put an RV8 in a Fiero ?


mgb260
Jim Nichols
Sequim,WA
(2277 posts)

Registered:
02/29/2008 08:29PM

Main British Car:
1973 MGB roadster 260 Ford V8

Re: 4.5/4.9 Cadillac V8
Posted by: mgb260
Date: July 26, 2021 10:47PM

Art, 4.9 has aluminum block with iron heads.


roverman
Art Gertz
Winchester, CA.
(3178 posts)

Registered:
04/24/2009 11:02AM

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

Re: 4.5/4.9 Cadillac V8
Posted by: roverman
Date: July 27, 2021 05:08PM

Ok, so why 215 heads on an aluminum caddy block ?


mgb260
Jim Nichols
Sequim,WA
(2277 posts)

Registered:
02/29/2008 08:29PM

Main British Car:
1973 MGB roadster 260 Ford V8

Re: 4.5/4.9 Cadillac V8
Posted by: mgb260
Date: July 27, 2021 08:41PM

Art, To get rid of the iron heads! To make the motor even lighter.


DiDueColpi
Fred Key
West coast - Canada
(1338 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: 4.5/4.9 Cadillac V8
Posted by: DiDueColpi
Date: July 27, 2021 09:49PM

So after seeing the caddy block naked, I see the issues. Relocating that row of studs is doable, sealing the head is problematic.
I think that even that spray on seal that makes your screen boat float won't save us.
However, the fix for the Lover engine can save the day!
Pull the cyls. and deck the block 0.500 thou. Machine a new deck from aluminum plate and sandwich it between the block and the Rover head. The inside studs line up so everyone can play nice there. The outer studs present a few more options. I would move the studs to line up with the rover head. Or you could countersink the caddy stud into the deck plate and drill the plate for the rover pattern. You could also weld the plate to the block but a failure would be disappointing. They all give the opportunity to utilize the American 6 bolt pattern if you wanted that. The other option that presents itself is drydecking the block by utilizing the deck plate to stop the wet cyls from walking around and meeting the neighbors.
Machine the inside edge of the decks to accommodate a sheet metal plate to seal up the valley and you are good to go.
There's more stuff but the leader of the opposition just poured me a scotchy scotch. so she's purchased something!
Cheers
Fred



BlownMGB-V8
Jim Blackwood
9406 Gunpowder Rd., Florence, KY 41042
(6274 posts)

Registered:
10/23/2007 12:59PM

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

authors avatar
Re: 4.5/4.9 Cadillac V8
Posted by: BlownMGB-V8
Date: July 28, 2021 09:43AM

Maybe you could run studs or long countersunk capscrews from that plate down into the main web to tie it all together and stabilize the liners and tie the heads down. Maybe external ribs/bolt bosses heilarced to the outside of the block could be used to do the same thing though and eliminate the plate.

Jim


mgb260
Jim Nichols
Sequim,WA
(2277 posts)

Registered:
02/29/2008 08:29PM

Main British Car:
1973 MGB roadster 260 Ford V8

Re: 4.5/4.9 Cadillac V8
Posted by: mgb260
Date: July 28, 2021 10:55AM

I Like the idea of the deck plate surrounding the liners. Kind of like a girdle on the top of the block. The intake side bolts are long and go down to the main web. The outer countersunk bolts would too. The outer head studs would be attached to the 1/2" deck plate. With a valley cover and spacers any Buick/Rover intake would work. Maybe a 300 intake would fit better?


roverman
Art Gertz
Winchester, CA.
(3178 posts)

Registered:
04/24/2009 11:02AM

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

Re: 4.5/4.9 Cadillac V8
Posted by: roverman
Date: July 28, 2021 11:27AM

Yea,yea, kinda like you would deck plate an RV8 for Lotus heads ? Why is a cad block so superior to an RV8 block,
it warrants all this work ? Forged crank, stronger, sustain more hp. ?


MGBV8
Carl Floyd
Kingsport, TN
(4327 posts)

Registered:
10/23/2007 11:32PM

Main British Car:
1979 MGB Buick 215

authors avatar
Re: 4.5/4.9 Cadillac V8
Posted by: MGBV8
Date: July 30, 2021 09:24AM

It's what they had. ;)
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