Engine and Transmission Tech

Then the fun begins wiring up the Megasquirt V3.

What pilot bushing should I use to match the T5 and rover crank?

10 inch Mustang pressure plate mounted on Rover flywheel. nice fit.

Rover Meet T5. Soon to be installed

McLeod Racing throw out bearing/slave

passenger side header pass throw hole

Drivers side header pass threw hold

Need some info, I have seen in Jim Stuart's photo's and write up that he is using a serpentine belt. the question is how much of a difference is there between the 3.9 and 4.0 front cover. my front pulley is 5 in from block to outside edge. that doesn't appear to be enough room to mount an alternator. So any one got a good photo of a set up or know what will work?

Late 3.9 front covers are identical to the 4.0 in Discoveries.

'94/'95 Discos and '95 RRCs with 3.9s and 4.2s used the same front cover. The dimensions are identical to those used in Discos through 99-1/2 (GEMS EMS).

The earlier engines with the distributor driven oil pumps had shorter crankshafts than those with the crank-driven oil pumps.

All of the Rover V8s had the alternators mounted up high

Very interested in this thread since it's the same kind of build I'm doing. 4.6L GEMS, GM T5 and converting to megasquirt 3.

Keep us updated!

Jim, he put the Serp belt assembly in his maroon roadster, he also had the yellow gt. I talked to him a while back, I believe he sold both cars but could be wrong.

Quote:

Rover 4.0 project restart after 3 years
Posted by: galotis
Date: June 05, 2018 04:10PM

Hey guys, I am starting up an old project, installing a 4.0 rover in a LE MGB, started this 3 years ago, owner couldn't finish it then, but can now, two of the problems I was working on when I left off was what front cover to use and how to get more clearance for the oil take off ports. this will be an EFI motor and the plenum and intake have been shaved to clear bonnet. Owner wants AC so will need to find the brackets to mount the compressor and the alternator. taking suggestions..

Edited 3 time(s). Last edit at 06/06/2018 10:38AM by MGBV8.

Quote:

Re: Rover 4.0 project restart after 3 years
Posted by: 88v8
Date: June 06, 2018 04:31AM

If it helps with understanding where you're already at, I'd continue the old topic.

So, is that a crossbolt block with a P6 cover?
Someone has a made a new cover, umm, John Eales... here it is... scroll down... any use?
[johnealesroverv8.co.uk]

Ivor

Threads are now merged (in a funky manner), George.

It would be helpful to know what front cover you are using.

Carl, the present front cover is the original that was on the 4.0 motor when pulled out of the range rover. I know the plenum cover is a 3.9, I am using that to clear the hood, the 4.0 cover is flat and wont clear with out milling more off then reasonable.

It is a 4 bolt main.

I would like to keep the original cover only due to the cam sensor is in it, and I need a cam sensor for sequential injection. If there is a better cover that also has a provision for a cam sensor and better clearance for oil ports then that would be ideal.

I looked at the one from John Eales, not sure if I can tap it for a cam sensor, anyone know?

Thanks for merging the two treads.

I'd ask John Eales, he's very helpful.

Ivor

George, I think you should stay with the newer front cover if you can. Probably it can be modified if needed. The water pump can be driven by either side of a serpentine belt so the serp belt can be used with either late or early covers.

Now the old style cover can also be used. For instance, on my 340 I have a VR pickup mounted in an aluminum block that bolts on with the old fuel pump bolts. The trigger wheel is a row of 1/4" holes drilled in the lower pulley. With your flywheel trigger you wouldn't need that. The cam sensor goes in the distributor hole and drives the oil pump. I modded a distributor to make one but you can use one from a Buick V6. Not cheap, though maybe you could find a better price:
[www.amazon.com]

Jim

All you need is a single pulse per cam revolution George.
That means that any of the covers can be modified easily to accommodate that.
So pick a cover that works for your oiling and cooling and worry about the pickup after.
You could modify an old distributor with an old cover like Jim did. Utilize a newer cover with the sensor already built in. Build a wheel for the cam gear or drill it for a single pin and set up the Eales cover to read it. The fuel pump cam is fair game as well.You could even drill a valve cover and mount a sensor to read a single rocker. The megasquirt will accommodate pretty much any signal that you give it as long as its only once per cam revolution. The only caveat is don't have the crank sensor missing tooth and the cam pulse line up together.
This can cause sync. errors.
I've never experienced the problem but I hear that it happens.

live like you mean it
Fred

thanks guys, will email Eales and see. will post what I decide.

I’m working a similar build, only much more slowly. I think you’re already a bit ahead!

I test fitted my 4.6 with T5 trans, and I concluded the stock front cover would fit. The latest style cover wasn’t as thick as the interim style that still had casting dimensions for a distributor, so the water pump sits a bit closer in.

The challenge is the oil filter. You can take off the factory 70-degree elbow and fit a remote filter cap, I think/hope. It will be very close.