2.5 litre engine

[Tbedman]

Has anyone rebuilt a 2.5 litre engine. What is the difference between the 2.5 and the 2.25 engine? timco:thumb-up:

[SafeAirOne]

Yes and Petrol or Diesel?

[Tbedman]

2.5 Petro is it a good engine? Timco3

[SafeAirOne]

2.5 Petro is it a good engine? Timco3

Hmm...Not sure. I have the more popular 2.5 diesel. That's what I rebuilt, so I probably won't be of much help to you. Somebody here has a 2.5 petrol. Nick Dawson maybe?

[yorker]

Tim in CT had one in his lightweight- maybe he'll chime in.

[Tim Smith]

Still got it. It ran like a raped ape and I thought the engine was great but the previous owner may have been a street light racer with my particular unit. It would pull the lightweight well past 85 miles an hour on a non-adjusted speedometer with new 33" tires on it. If I had a GPS back then, I'm sure I would have figured the truck much closer to 100 than I care to admit. That was with a roverdrive but even still, the gearbox would sound like Armageddon. :eek::eek::eek:

That particular engine was set up with a 2 inch exhaust and an SU carb with a ported intake. I believe it was the ACR power plus set up so it probably had a twisty cam as well. Unfortunately it developed what sounded like a rod knock (only some of the time) shortly after I bought the truck, so I pulled it out to find out why. Couldn't find a single thing wrong with the bearings but I did find the rings carboned up beyond belief.

I would have put it together a year ago but I am still waiting for the parts to arrive from another supplier. Till then I'm still running the 2.25 into the ground.

As stock, the 2.5 and the 2.25 have a lot in common. The 2.5 will be 5 bearings and should have some webbing on the block to increase strength. If you like the 2.25, you will like the 2.5 even more.

[NickDawson]

As stock, the 2.5 and the 2.25 have a lot in common. The 2.5 will be 5 bearings and should have some webbing on the block to increase strength. If you like the 2.25, you will like the 2.5 even more.

I'm not seasoned enough to know the minute differences, my anecdotal observations is that most ancillary systems are interchangeable. I had a rough time finding a starter for the 2.5, and the weber carb on there is a beast to work with (or rather find parts and tuning info for). Otherwise, I've felt spoiled to have the power increase and the interchangeability with the 2.25

[Tim Smith]

The starter for the 2.25 will interchange with a 2.5. As for the weber, are you dealing with the single barrel (34 ICH) or the double barrel. I found the single barrel to work fine with a 2.25. If the weber has not already been rejetted, that could be the source of your trouble. There isn't too much you can adjust on them otherwise.

[NickDawson]

The starter for the 2.25 will interchange with a 2.5.

Not according to our hosts and others on this board and the local UK starter rebuilder.
Had to order mine from the UK
Doesn't mean I wasn't led astray :D

My carb is a 32/34 DMTL I think - out of production, so knocking on wood that it stays in tact

[Tim Smith]

Really? Seeing how the starter bolts to the transmission and the flywheels are practically the same, I wonder what could be different. If your transmission is the newer LT77, 85 or 95 or even the R380, then I can see a possible problem but if it's the good old series box than I bet you could have gotten away with it. Either way, I'd be curious if you had any photos.

Sorry, I don't have much experience with the twin barrel carb.

[yorker]

Tim- what carb are you going to use on your 2.5?

[Tim Smith]

I'm not going to run a carb any more. :D

The SU is great for power but terrible for economy. The weber single barrel is anaemic for power but can give relative economy. The weber double barrel gives everyone a heartache unless something else is wrong. The Zenith is a fantastic all rounder if it's not warped. If you ask me, all of them are in trouble with the new fuels.

Once I get the details figured out, I think I will have a fuel injection set up that should withstand the new fuels. Don't worry, I won't keep it to myself.

[yorker]

Cool, I was just wondering because I think I know of a guy with a spare 2.5l Weber carb and intake. EFI would be a huge leap forward though.

I remember looking at an Escort throttle body EFI years ago and thinking that that could be modified for a series intake:
http://cgi.ebay.com/ebaymotors/NEW-OEM-THROTTLE-BODY-EXP-ESCORT-LYNX-LN7-83-_W0QQcmdZViewItemQQhashZitem5d2970ea3fQQitemZ40012 7224383QQptZMotorsQ5fCarQ5fTruckQ5fPartsQ5fAccesso ries
I think that is similar to the one I had in hand when I was dreaming about that.

[Tim Smith]

That Ford throttle body looks like an easy fit doesn't it. :cool:

My foray into EFI and electronic ignition may not lead me anywhere good but it's an itch that just has to be scratched.

[LaneRover]

One of the Rovers Mags had an article about a guy who put a throttle body EFI AND a Mini supercharger into a SI Rover.

[Tim Smith]

One of the Rovers Mags had an article about a guy who put a throttle body EFI AND a Mini supercharger into a SI Rover.Really? That sounds like fun!

[LaneRover]

I guess that so many people opted for the bigger supercharger that you could get the smaller ones for about $125. He made the brackets, figured out an Gas flow sensor and the rest of the EFI system, put it all together and had a really nice quick little SI. Remind me in a month or two and I might be able to see if I can find the article. In the middle of a move right now and hoping that I don't end up working in Dallas when I just moved to Jacksonville!

[Tim Smith]

I guess that so many people opted for the bigger supercharger that you could get the smaller ones for about $125. He made the brackets, figured out an Gas flow sensor and the rest of the EFI system, put it all together and had a really nice quick little SI. Remind me in a month or two and I might be able to see if I can find the article. In the middle of a move right now and hoping that I don't end up working in Dallas when I just moved to Jacksonville!
I'm setting up the reminder to myself now. You'll hear from me in a month. :D :thumb-up:

[Tim Smith]

So, um... Did you find it? :D

[lrdukdog]

Wouldn't the Rochester BV replace the Weber?
Jim Wolf

[LaneRover]

So, um... Did you find it? :D

Not yet - moves are . . . . . . complicated AND now I am in Dallas working away from my Rover Mags. Feel free to continue the reminders (after Christmas?)

[Tim Smith]

Not yet - moves are . . . . . . complicated AND now I am in Dallas working away from my Rover Mags. Feel free to continue the reminders (after Christmas?)
Okay. I don't want to be a hound though. :rolleyes:

[LaneRover]

If I don't find it at just after the after Christmas reminder - Mid-February is your next reminder time ;-)

[junkyddog11]

if it has the flywheel housing from the 2.5 it may have a 3 bolt starter. I believe the starter from any of the 2.5's (n/a, td, 200 /300) might fit. Not sure if the parts books agree with this. They (the books) list something difficult to find for the 2.5 na (same flywheel housing as the 2.5 petrol) the 300 starter fits fine and works well and is easily found.

[Tim Smith]

If I don't find it at just after the after Christmas reminder - Mid-February is your next reminder time ;-)
This is turning into a game for me now. :p Any luck finding it? Hope the move went well!

[LaneRover]

This is turning into a game for me now. :p Any luck finding it? Hope the move went well!

Move going well, thanks. (as always, still unpacking)

I actually did take some time and looked through my Rover mags while I was home. I did not find it. I think that it has to be either LROI or Enthusiast between 2001 (I think that is when the new Mini came out) and 2005 when I moved between houses in San Diego.

Now I am back in Dallas. Maybe if I stop looking for it I will suddenly find it - or I should start looking for a different issue!

Brent

[LaneRover]

Tim

I found this info on the LROI back issues page. Now I know which to look for specifically. Or maybe someone else can find it quicker and scan the pages in!

Brent

DECEMBER 2006
40 English counties in 40 hours. P.4 (6pgs)
Child seats: the regulations. P.13 (0.25pge)
Wrecks-Riches. 88-inch SIIA SW-Iceland p.26 (5pgs)
Defender Double Cab. Standard + equipped for expeditions p.42 (6pgs)
Security. How safe is your Land Rover? P.50 (6pgs)

Supercharged Series I p.58 (2pgs) :thumb-up:

Ultimate Discovery 3.Matzker upgrade p.66 (6pgs)
Dave’s UK tour: South Cambridgeshire p.74 (6pgs)
Readers’ Adventure: Oman p.86 (7pgs)
Readers’ Adventure: Africa made easy p104 (4pgs)
60 Years of Land Rover: 101’s, West East Sahara expedition p.112 (2pgs)
Greenlane of the month: Marsh Lane, Curridge, West Berkshire p.143(1pge)
Range Rover Classic: Buying tips p.173 (1pge)
Weekend workshop: How to change headlamps p.208 (2pgs)
Budget rebuild Discovery: Fitting new exhaust and front brake callipers p.216 (3pgs)
DIY Service Guide: Top tips by Eddie Evans p.220 (6pgs)
Electronic tuning: What’s to be gained from an upgrade? P.226 (5pgs)

[Tim Smith]

Cool thanks! :thumb-up:

I didn't want to pester you any further. :o