Engine and Transmission Tech

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

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mgb260
Jim Nichols
Sequim,WA
(1958 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: February 16, 2010 08:30AM

Here is a guy that put LS beehive springs 1.7 Ford (351 Cleveland) roller rockers with homemade steel bridge and 2.00/1.5 valves in 4.9 heads. He also uses Northstar pistons(.040 over stock and 10.5 compression).Pics of heads:
DSCN2246_(Medium).jpg
DSCN2248_(Medium).jpg
DSCN2244_(Medium).jpg



Edited 2 time(s). Last edit at 02/16/2010 08:33AM by mgb260.


mgb260
Jim Nichols
Sequim,WA
(1958 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: February 17, 2010 12:01AM

Allante 4.5 intake:
DSCN0897%20(Medium).jpg
DSCN0895%20(Medium).jpg


mgb260
Jim Nichols
Sequim,WA
(1958 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: February 17, 2010 12:15AM

Heads on this motor show inner head bolts with studs on top for rocker bridge:
DSCN3639%20(Medium).jpg


mgb260
Jim Nichols
Sequim,WA
(1958 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: February 18, 2010 08:41AM

Crossdrilled crank and front view for same motor:
DSCN2948%20(Medium).jpg
DSCN3619%20(Medium).jpg


mgb260
Jim Nichols
Sequim,WA
(1958 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: February 20, 2010 11:09AM

Inside of block:
DSCN2805%20(Medium).jpg


mgb260
Jim Nichols
Sequim,WA
(1958 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: February 21, 2010 06:49PM

Motor for Fiero with Alante fuel injection:
oncradlefront.jpg



Edited 1 time(s). Last edit at 02/21/2010 06:50PM by mgb260.


mgb260
Jim Nichols
Sequim,WA
(1958 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: February 24, 2010 03:19PM

Found out a few things taking the motor apart. To pull the water pump you have to pull the pulley as there are 3 bolts hidden under it. You need a 3 jaw 4" gear puller to pull the damper. Also found a small piece of rocker arm guide laying in head. also found a wire clip from lifter on oil pump screen. i checked all the parts and lifter and rocker guide must have been replaced. So I would highly recommend the c clips in the lifters. I plan on LS springs in mine also. Other than that all looks good. It looks like a Ford engineer designed it with the allen oil pump drive, small rod bolts,rocker arms and small ports. The cylinder liners and crank look like new. All bearings looked good. I could tell someone worked on the top end as all gaskets were new looking. (probably when they fixed the lifter and rocker arm guide). People have had trouble with the rocker arm bolts pulling out, with higher spring pressure. Now I know why, the small 8MM self tapping screws in the aluminum bridge. My fix will be 10MM/3/8" studs like the 60 degree V6 uses(Crane) for adjustable rockers. They will go through the bridge and will have a locknut below.Also the stock rockers should have the slot lengthend for higher lift to prevent binding. That is probably a contributing factor. I personally like the stock type 351 Cleveland(1.73 ratio stock) with longer slot. You can get a Crane roller trunion kit for it. After I pressure wash the block I'll take more measurements and pictures. You won't get the power out of this motor like a small block Ford or Chev or LS. It will fall between them and the V6, at about the same weight as the V6. Plus, cheap in wrecking yards. A very good upgrade for 4 and V6 stock motors.



Edited 2 time(s). Last edit at 02/24/2010 03:39PM by mgb260.



mgb260
Jim Nichols
Sequim,WA
(1958 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: February 24, 2010 05:57PM

Pictures of my freshly pressure washed block:
PCV 001.jpg
PCV 002.jpg
PCV 003.jpg
PCV 004.jpg


mgb260
Jim Nichols
Sequim,WA
(1958 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: February 24, 2010 05:59PM

picture of lifter cover with "DO NOT REMOVE"
PCV 006.jpg


mgb260
Jim Nichols
Sequim,WA
(1958 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: February 24, 2010 06:06PM

A couple more:
PCV 010.jpg



Edited 3 time(s). Last edit at 02/24/2010 06:22PM by mgb260.
PCV 011.jpg


mgb260
Jim Nichols
Sequim,WA
(1958 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: February 24, 2010 06:13PM

A lot of sharp machined surfaces. One more pic:
PCV 012.jpg



Edited 4 time(s). Last edit at 02/24/2010 07:07PM by mgb260.


roverman
Art Gertz
Winchester, CA.
(2973 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: February 24, 2010 07:00PM

Jim, That is quite a slot behind the upper main shells ! Block looks, diecast through-out. Story I heard was GM bought "Evenrude", for their diecasting expertise, first used in the Quad Four ? Got LS head gasket ? Thanks for sharing. " Mike", see how this works ? roverman.


mgb260
Jim Nichols
Sequim,WA
(1958 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: February 24, 2010 07:16PM

Actually it was Mercury Marine that was brought in to help because of porosity problems with the early 4.1. I recommend wearing light gloves as I have lots of little scrapes and cuts just handeling the block. Very sharp wherever it was machined. I can pick it up with one hand.


mgb260
Jim Nichols
Sequim,WA
(1958 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: February 24, 2010 07:43PM

I am going to use an electric Chevy water pump with adapters similar to the Chrysler Hemi set up.
d6fe_2.jpg


BlownMGB-V8
Jim Blackwood
9406 Gunpowder Rd., Florence, KY 41042
(5735 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: February 25, 2010 05:20PM

Those electric water pumps flow what, maybe 50 GPH max? Is that enough for a street driven car?

JB



roverman
Art Gertz
Winchester, CA.
(2973 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: February 25, 2010 05:40PM

Jims' and clan. Should be gal per min. "Mezier", in line .rated 20 gpm while hi-flow rated at 55 gpm. As long as your not boiling/steaming, somewhere in the system, I don't see the need for over-kill on flow. I have seen cars/trucks with big hoses and tubes in rad, boil, because thermostat had been removed. Coolant moved too fast through rad.= not enough thermal differential, between in/out. Slower the flow through rad ,more heat exchanged. Anyone use "Evan's Waterless" ? roverman.


mgb260
Jim Nichols
Sequim,WA
(1958 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: February 27, 2010 04:48PM

Those water pumps are just starting to catch on with street rods and street/strip cars. I read of one guy that has over 100,000 miles on his.


mgb260
Jim Nichols
Sequim,WA
(1958 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: March 07, 2010 03:37PM

More pics,the oil pan has a nice baffle I am going to use in the earlier (4.1)rear sump pan, or modify the 2 pans I've got for rear sump.All the internal parts are on one bench,still have to be cleaned and examined. Both manifolds, 85 4.1 single plane with TBI and 4.9 bare intake.
PCV 001.jpg
PCV 002.jpg
PCV 003.jpg
PCV 004.jpg


roverman
Art Gertz
Winchester, CA.
(2973 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: March 07, 2010 08:00PM

Jim, Looks like "cast" rods ? Engine weights on webb shows 4.9L at 360 lbs. with flex plate and alt. MGB bound ?Good Luck, roverman.


mgb260
Jim Nichols
Sequim,WA
(1958 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: March 08, 2010 10:49AM

I plan on putting the bare block in the MGB bay next week and figuring mounts. That's what this site is all about,American engines in British cars or British engines in American cars(Nic's Rover/Vega).Hey, I just remembered I had a Vega with a Buick V6. Oh, that doesn't count. American in American! LOL!
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