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Old 11-04-06
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155 3.0v6??

A guy at work is looking for an Alfa V6 engine for a project Car, he has apparently found a written off 155 with a 12V 3.0 V6 in it. I didn't think they did a 3.0

It's on an S plate as well, which is after the 156 came out, just wondering if it's some sort of special, or perhaps it a normal V6 but with a 164 Engine.
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  #2 (Post Link)  
Old 11-04-06
wrinx
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Re: 155 3.0v6??

There are a couple of 155s with 12v 3.0 engines fitted, all aftermarket jobs with 2nd hand engines. They're supposed to be VERY rapid machines

Being on an "S" plate is odd.....only ever seen R but have vague memories of hearing about an S plate before.

wrinx
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Old 11-04-06
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Re: 155 3.0v6??

Make him get piccies
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Old 11-04-06
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Re: 155 3.0v6??

Might not be pretty it's in a breakers!.
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Old 11-04-06
Peter K
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Re: 155 3.0v6??

I know of a few 155 with 12V engines, and have seen them in action. They were not very fast but used a lot of petrol to make up for it

Was told the reason was a mismatch between the 155 gearbox and the 3.0 12v engines. Dunno if this makes sense?
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Old 12-04-06
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Re: 155 3.0v6??

The 155 has an overall higher gearing (more revs per MPH) than a 164, so while it might not have as high a theoretical top speed as it did in the 164, it'll certainly be quicker getting there. Can't see it being that big a problem to be honest and the extra torque of the 3l over the 2.5 is well worth having. As long as the conversion is done properly, I can't see any reason why it wouldn't be quicker than a 2.5 either. More torque, more power, same redline, same weight. I get typically better MPG out of my 3l 12V in my kit than I do out of the 2.5l in the 155. I can see issues with trying to use the 2.5 engine management components with the 3l motor though. I suspect most people would just 'plug in' the 3L and expect it to work with the 2.5 ECU and associated electronics.

...but it's definately not a standard car. I very much doubt you could get a 24V motor into the 155, but always happy to be proved wrong!

If the motor in this car really is a 3l (capacity is marked on the castings), check where the water rail comes out. If it's been moved to the flywheel end (like a standard 155 V6) then it would probably be simpler to install in a project car. The 164 12V & 24V setup means more space needed round the crank pulley end than later engines like the 156.

Just my 2€
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Old 12-04-06
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Re: 155 3.0v6??

Originally Posted by ChrisS
The 155 has an overall higher gearing (more revs per MPH) than a 164, so while it might not have as high a theoretical top speed as it did in the 164, it'll certainly be quicker getting there. Can't see it being that big a problem to be honest and the extra torque of the 3l over the 2.5 is well worth having. As long as the conversion is done properly, I can't see any reason why it wouldn't be quicker than a 2.5 either. More torque, more power, same redline, same weight. I get typically better MPG out of my 3l 12V in my kit than I do out of the 2.5l in the 155. I can see issues with trying to use the 2.5 engine management components with the 3l motor though. I suspect most people would just 'plug in' the 3L and expect it to work with the 2.5 ECU and associated electronics.

...but it's definately not a standard car. I very much doubt you could get a 24V motor into the 155, but always happy to be proved wrong!

If the motor in this car really is a 3l (capacity is marked on the castings), check where the water rail comes out. If it's been moved to the flywheel end (like a standard 155 V6) then it would probably be simpler to install in a project car. The 164 12V & 24V setup means more space needed round the crank pulley end than later engines like the 156.

Just my 2€
"Creams" 3.0 12v 155 is using the 2.5 electronics and ECU gubbins of a 2.5 - hence he has a problem at high RPM - think he said it cuts out - he needs to get it mapped properly.
He cut away the side of the enigne bay to make the thermostat fit

I think some of the dutchies have done the 24v version - must be one hell of a ride!!
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Old 13-04-06
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Re: 155 3.0v6??

I was chatting with Cream about his conversion - the very problem you describe. not sure where he's at with it now though. Hope he got it sorted!

I saw one a wee while ago (GTVince) where the heads had been modified to use the 155 stat housing. Lot of work but looked good.
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Old 29-03-07
treborblack
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Re: 155 3.0v6??

GtVince came into my place of work for some engine valves the other day. did i curse the fact i didnt have my camera.

tis running a 3.0 with a 2.5 24v throttle body and a 2.5 gearbox. sounds really nice and the installation looked very professional i suppose it helps that the inner wing isnt cut. although with the cambelts exposed if it was mine i'd think about fitting the under tray for a bit of piece of mind.

with a silverstone spoiler that'd be one nice looker
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Old 31-03-07
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Re: 155 3.0v6??

In the Netherlands you can find these 'conversions':
2.5 12v EVO (tuned by H&S Corse)
3.0 12v
3.0 24v (only a couple)
3.1 12v (SaVaLi tuned)
2.0tb 12v yes, the 164 engine, this car is not finished yet.

And I know that one person is trying to fit a 3.7 Autodelta in is 155
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Old 07-04-07
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Re: 155 3.0v6??

I'm using a M1.7 '2.5' ECU with a 12v 3.0l spider motor and spider gearbox in a 155 and it redlines and goes very well, I was concerned about using the 2.5 ECU but I have it on good authority that it will be fine managing the 3.0 12 v lump....
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Old 16-04-07
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Re: 155 3.0v6??

Originally Posted by djstanley View Post
I'm using a M1.7 '2.5' ECU with a 12v 3.0l spider motor and spider gearbox in a 155 and it redlines and goes very well, I was concerned about using the 2.5 ECU but I have it on good authority that it will be fine managing the 3.0 12 v lump....
The problem Cream had with his setup appeared to be due to the AFM hitting the end-stop and the thing running out of fueling. Don't know if he got to the bottom of it to be honest.

I'm building a fresh 3l 12V for my kit at the moment. Slightly non-standard spec (C&B mild road cams, 3 angle valve seats, port-matching, 10:1 CR) so it'll be intresting to see what happens on the original Motronic. I'm not too bothered as long as it runs well enough for an MOT, as the next step is to install the Emerald ECU and get it mapped with that.

..then the blower....shame about the 10:1 CR but they were the only pistons I could get at the right price and at the right time.

I've been planning/talking about this for ages, but I'm finally getting it done at long last.

...but this is getting way OT! Sorry.
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Old 16-04-07
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Re: 155 3.0v6??

Originally Posted by ChrisS View Post
The problem Cream had with his setup appeared to be due to the AFM hitting the end-stop and the thing running out of fueling. Don't know if he got to the bottom of it to be honest.

I'm building a fresh 3l 12V for my kit at the moment. Slightly non-standard spec (C&B mild road cams, 3 angle valve seats, port-matching, 10:1 CR) so it'll be intresting to see what happens on the original Motronic. I'm not too bothered as long as it runs well enough for an MOT, as the next step is to install the Emerald ECU and get it mapped with that.

..then the blower....shame about the 10:1 CR but they were the only pistons I could get at the right price and at the right time.

I've been planning/talking about this for ages, but I'm finally getting it done at long last.

...but this is getting way OT! Sorry.
I was saying the same thing to Cream, it is definitely an AFM problem ... whether or not a Vane type AFM can be modified/found elsewhere to suit remains to be seen.....

Your 3.0 sounds cool......can I ask what it's going in?..... mines entirely stock for now, from the conversations I've had with people in the know a stock M1.7 will be fine with a stock 3.0........ I'm pretty sure you'll get a spec'd up 3.0 running well enough to MOT with a M1.7 - particularly if you've got an understanding MOT tester....

I've looked at the Emerald ECU's, complete overkill for my needs but do plan to have the M1.7 chipped either with a straightforward chip or maybe a piggyback/dastek type unit.... gotta recoup some funds first ..... I've some work to do first but I'd like to get 200bhp....... shouldn't be too unobtainable !!

Anyway, back on topic:
Mitch, has your mate found out anymore about the S-plate 3.0??


Screw Flanders
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Old 17-04-07
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Re: 155 3.0v6??

Certainly - it's for my CAE Corse kit car. Currently it's got a standard 3.0 12V in it but it's very sick. I put it in last year to replace the 2l TC I built the car with...but it was an e-bay special 164 donor car and a total punt. Turned out to be a bad one in the end as I probably did no more than 1000 miles before the motor went south. Nasty top-end noise and clouds of oil smoke from one of the front-bank cylinders. Advert claimed it had been rebuilt by "a Lotus technician" Probably one of their domestic technicians if you ask me, based on how much orange silicone snot was plastered all over it.

MOT wise I should be OK with the original Motronic as the car only has to meet the standard set when I SVA'd it....on a 1976 Lancia TC motor 3% CO and 1200ppm HC IIRC. No CAT!

I've had an Emerald ECU in various forms for years now. Have one on the Westfield now and a new one ready for the V6. Very capable bit of kit for a decent price I think. You can spend (arguably waste) a lot of money on chipping an existing ECU and get little back for it I reckon. It'll be essential for my supercharging experiment...

Slightly on-topic....I'll be using a 155 throttle body as it has a proper throttle pot, rather than the switch type used on the early Motronic.

I'm still interested in the 3.0 155 too.....
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