Engine and Transmission Tech

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

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mgb260
Jim Nichols
Sequim,WA
(2463 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: September 03, 2010 11:49AM

Crane has conversion rocker studs for Cleveland, 5/16" bottom and 7/16" top for adjustable roller rocker arms. BB Chevy roller rockers are cheaper than Ford. Homemade guide plates. Been on vacation, but too many things going on.



Edited 1 time(s). Last edit at 09/04/2010 11:59AM by mgb260.


mgb260
Jim Nichols
Sequim,WA
(2463 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: September 03, 2010 08:22PM

Speedway motors has Chevy valve keepers that raise spring height .030 or .060. Crane has keepers that lower that amount.So you could get the right height without machineing the heads. You would still have to cut the guide down for Viton Perfect Circle type seals. You could do that yourself with a cutter and hand drill. Cut the guide down in the bowls also. Unshroud combustion chambers and good port job. I'll be using Chevy Z28 or LS1 Beehive springs(undecided) and 1.94 stainless intake and 1.5 exhaust valves. Good for up to .550 lift and 6500 RPM, about 105 lbs @ valve closed and 320 lbs @ .550 lift.



Edited 5 time(s). Last edit at 04/15/2012 02:22PM 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: 4.5/4.9 Cadillac V8
Posted by: roverman
Date: September 04, 2010 11:56AM

Jim, Flat tappet ? Look's like lifter bores are long ? Potential for roller ?
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mgb260
Jim Nichols
Sequim,WA
(2463 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: September 04, 2010 11:57AM

4.9 uses the longer Chevy V8 roller lifters. I just like roller rockers too.



Edited 1 time(s). Last edit at 09/04/2010 12:01PM by mgb260.


mgb260
Jim Nichols
Sequim,WA
(2463 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: October 11, 2010 10:28PM

Low mount alternator setup for serpentine belt. Opens up intake area for 3800 supercharger.
AlternatorBracketsFinal2.jpg
AlternatorBracketsFinal9.jpg


serenitythen
Jeff Allen
Tacoma, WA
(2 posts)

Registered:
10/11/2010 10:26PM

Main British Car:
Re: 4.5/4.9 Cadillac V8
Posted by: serenitythen
Date: October 12, 2010 01:32AM

Nice looking project neighbor!
I created this account to ask if there was any updates to this project and you beat me to it within a few hours. I'm mainly interested in all the 4.9 trickery.



Edited 1 time(s). Last edit at 10/12/2010 01:34AM by serenitythen.


RideZiLightning
Dallas Jolley
Tacoma, WA
(2 posts)

Registered:
10/28/2010 05:23AM

Main British Car:
1968 MGB GT 4.9l

Re: 4.5/4.9 Cadillac V8
Posted by: RideZiLightning
Date: October 28, 2010 05:27AM

I think I just might beat you to it

The car was going to have a 350 in it, but I changed my mind when a snagged up a 4.9l for $150 and 4l60-e from an s-10 for $90

71k on the 4.9l and 27k on the tranny

http://sphotos.ak.fbcdn.net/hphotos-ak-ash2/hs118.ash2/39238_1426862437542_1412239948_31223652_8124255_n.jpg

I'm in WA as well btw



Edited 1 time(s). Last edit at 10/28/2010 05:28AM by RideZiLightning.



mgb260
Jim Nichols
Sequim,WA
(2463 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: October 28, 2010 01:31PM

You might! Haven't had much time lately. Did the torque converter bolt up to the 4l60E?



Edited 1 time(s). Last edit at 10/28/2010 01:34PM by mgb260.


serenitythen
Jeff Allen
Tacoma, WA
(2 posts)

Registered:
10/11/2010 10:26PM

Main British Car:
Re: 4.5/4.9 Cadillac V8
Posted by: serenitythen
Date: October 28, 2010 09:06PM

I sure wish I had as much engine bay space to work with on my planned swap (4.9 in a fwd Saturn).
There's a few completed fwd 4.9 Chevy Citations around the country which sorta inspired me.
[www.petacar.org]
[thebaron.110mb.com]

Good Luck with your projects fellow Washingtonians!


RideZiLightning
Dallas Jolley
Tacoma, WA
(2 posts)

Registered:
10/28/2010 05:23AM

Main British Car:
1968 MGB GT 4.9l

Re: 4.5/4.9 Cadillac V8
Posted by: RideZiLightning
Date: October 28, 2010 10:43PM

Yessir, tc works for fwd, rwd, v6, and v8 setups

I'm no stranger to the swap as I've done multiple 4.9l, 3.8SC and 3.4DOHC Fieros

It's all wired up to run out of the car. I just need to finish the dash wiring, lengthen the driveshaft, finish my trans mount and swap out the leaking water pump

This car has been sitting since Dec of '88 so it has ALOT of work before it's road worthy


mgb260
Jim Nichols
Sequim,WA
(2463 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: December 28, 2010 03:28AM

Turbo build plus other mods from Pennock's archive: [www.fiero.nl]
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mgb260
Jim Nichols
Sequim,WA
(2463 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: January 17, 2011 02:26AM

Ebay has quite a few 4.9 motors $200-$500. Cheap gaskets,bearings,etc. Also found pictures of 82-85 4.1 RWD dampener and water pump pulleys. Looks like you could use SBC pulleys with my SBC water pump adapters and the early dampener.
!B9-zzSgBGk~$(KGrHqF,!jkEzKJ)vvZzBM7W!TTRLg~~_12.jpg
!B)nmbMQEWk~$(KGrHqR,!iIEw5MWp4N6BMOTP-yLSw~~_12.jpg


mgb260
Jim Nichols
Sequim,WA
(2463 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: August 23, 2011 05:56PM

Link to Pennock's forum thread of M90 supercharger on 4.9. My project has been on the back burner for awhile. [www.fiero.nl]



Edited 2 time(s). Last edit at 08/23/2011 07:21PM by mgb260.


mgb260
Jim Nichols
Sequim,WA
(2463 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: April 15, 2012 02:25PM

Motor mounts will be about 1 1/2" further forward than 60 degree V6. Also here is an interesting thread from the Fiero forum:

[www.fiero.nl]


mgb260
Jim Nichols
Sequim,WA
(2463 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 02, 2017 12:56AM

Let's bring this thread back from the dead! More goody's for the 4.9 Cadillac!
[johns49performance.com]



MGBV8
Carl Floyd
Kingsport, TN
(4512 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 02, 2017 11:27AM

Check the "Scans from 'Automotive Rebuilder,' June 1994" at the bottom of this page.

[www.nathanbittinger.com]


BlownMGB-V8
Jim Blackwood
9406 Gunpowder Rd., Florence, KY 41042
(6470 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 02, 2017 12:16PM

Definitely interesting. Also of note, on a few Cadillac models they used a variant of the Aisin AA80E transmission. Called it something other that AA80E though. I wonder if it would fit this engine?

Jim


Scott68B
Scott Costanzo
Columbus, Ohio
(562 posts)

Registered:
10/25/2007 11:30AM

Main British Car:
1968 MGB GM 5.3 LS4 V8

authors avatar
Re: 4.5/4.9 Cadillac V8
Posted by: Scott68B
Date: July 02, 2017 11:12PM

I very seriously considered this swap back in 2010. Jim N. and I exchanged several PMs about this motor at the time. It is very compact and light and I thought it would fit very nicely in a B engine bay. I had a plan to mount a blower to the intake manifold and use some custom GM OBD1 code called Code59 to run it. It would have been an interesting project. It wasn't long after this that I started considering an LS swap and the rest is history. It would be great to see someone use one in an LBC.


mgb260
Jim Nichols
Sequim,WA
(2463 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 04, 2017 09:44PM

Johns4.9performance engine start up:

[www.fiero.nl]

Pics of beautiful 4.5 V8 John did for a friend:
4.9 image 2.jpg
4.9 image_1.jpg
1990-4-5-engine_orig.jpg



Edited 3 time(s). Last edit at 07/09/2017 08:54PM by mgb260.
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mgb260
Jim Nichols
Sequim,WA
(2463 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 09, 2017 10:15PM

Buick V6 roller fulcrums and slots added for pedestal rockers from turbo build thread on Pennock's site:
rocker notches.jpg



Edited 2 time(s). Last edit at 07/10/2017 06:57AM by mgb260.
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