Omega Owners Forum
Omega Help Area => Omega General Help => Topic started by: Arebee on 09 November 2007, 17:57:29
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2.5v6 conversion into 3.2v6....
Does anybody know if a 3.2v6 auto 52 plater engine will go straight into my 2.5v6 manual 1998 hole ?? or does this need some adaption ?? all the help would be appreciated as i have the 3.2 engine but nobody seems to know if it will go straight onto my manual gearbox and i dont fancy pulling it all out to have to put the 2.5v6 back in !!
Cheers guys
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I'm thinking you'd need a manual flywheel, don't know if the 2.5 one would fit. Electronics would need some work, with the 2.5 having cable, 3.2 being fly-by-wire. But I'm in no way an expert, I've only enough knowledge to be mildly hazardous when unsupervised.
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I'm thinking you'd need a manual flywheel, don't know if the 2.5 one would fit. Electronics would need some work, with the 2.5 having cable, 3.2 being fly-by-wire. But I'm in no way an expert, I've only enough knowledge to be mildly hazardous when unsupervised.
What do you mean by fly-by-wire ???
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i think he means that things like throttle control are done by electronics and not by a physical cable running from pedal to intake,
could be wrong tho
cheers
nathan
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so how difficult would it be to add these 'fly-by-wire' 'electronics' into my car ??? i do have the whole 52 plater 3.2 car so i have access to all the parts ?? somebody must have done this already i can't be the only one dreaming of this ! am i ???? :o
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so how difficult would it be to add these 'fly-by-wire' 'electronics' into my car ??? i do have the whole 52 plater 3.2 car so i have access to all the parts ?? somebody must have done this already i can't be the only one dreaming of this ! am i ???? :o
In that case, you'd have to see how much of it you can swap - I'd imagine you'd need the ECU and loom, but then you'd have to use one of our friendly Tech2 operators to get it all working with the various systems.
To be honest, the 3.2 only has en extra 10bhp over a 3.0, you'd probably have less hassle putting in a 3.0 engine.
HTH :y
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To do it you need to swap the engine management from your 2.5 to the 3.2 bare block and loose the coil per plug setup.....do this and its feasable.
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so is this going to be so much easier just to use a 3.0 lump then ?? whats the power difference between the 2.5 and 3.0 anybody know ??
And does anybody know about say supercharger either the 2.5 or 3.0 engines ?? do the engines themselves need alot of work to be able to handle the extra power or do they survive ????
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I personally would just put some 3.0 cams in the 2.5....
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I personally would just put some 3.0 cams in the 2.5....
how much extra would this give me ?? and is it an easy job to do ??
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I think it's + 20BHP but somebody would need to confirm, it's the same mod as Vauxhall (Well MSD) did with the Vectra 2.5 GSi
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An easy 20bhp, pushing it very close to a 3.0. Add a MTEK chip, and it will be great, V close to 3.0 power, with no need for all the heavy mechanical work!
Cams are easy enough, just like doing a cambelt and cam cover gasket change, with a few more bolts ;)
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the 3.2 engine will fit straight onto your gearbox, the mounts etc are all the same but you would need to swap both inlet and exhaust manifolds and engine loom from your original engine when the engine is out, which is very straightforward with the engine out.
has anyone ever put a car on a dyno before and after 3.0litre cams been fitted? i`ve always been dubious about the power gains from just fitting cams, cant see how they can bring the power up so close to the 3.0litre engine which already has those cams fitted!
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has anyone ever put a car on a dyno before and after 3.0litre cams been fitted? i`ve always been dubious about the power gains from just fitting cams, cant see how they can bring the power up so close to the 3.0litre engine which already has those cams fitted!
id be interested on that as well. i dont understand how putting 3.0 cams in the 2.5 will give good gains. the 3.0 will always have more torque and bhp is rpm x torque so how can the 2.5 get to similar power to the 3.0 :-?
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I personally would just put some 3.0 cams in the 2.5....
complete agreement - gains outwith this are marginal. Gains of 3.2 over a 3.0 are also marginal.
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has anyone ever put a car on a dyno before and after 3.0litre cams been fitted? i`ve always been dubious about the power gains from just fitting cams, cant see how they can bring the power up so close to the 3.0litre engine which already has those cams fitted!
id be interested on that as well. i dont understand how putting 3.0 cams in the 2.5 will give good gains. the 3.0 will always have more torque and bhp is rpm x torque so how can the 2.5 get to similar power to the 3.0 :-?
More valve lift....
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has anyone ever put a car on a dyno before and after 3.0litre cams been fitted? i`ve always been dubious about the power gains from just fitting cams, cant see how they can bring the power up so close to the 3.0litre engine which already has those cams fitted!
id be interested on that as well. i dont understand how putting 3.0 cams in the 2.5 will give good gains. the 3.0 will always have more torque and bhp is rpm x torque so how can the 2.5 get to similar power to the 3.0 :-?
Bhp = (torque x revs)/5252.....if you want more bhp, juts move the existing torque further up the rev range (exactly what motor bike and F1 engines do).
The cams do work and there are dyno plots around to prove it, its more popular on Vectras and Cav/Calibras though.
The cams offer extra lift and longer duration......I suspect that the 2.5 might have been slightly throttled to give better low end torque and to make sure there was a decent differential between teh 2.5 and 3.0.
And as already said, this is exactly what was done to the 190bhp Vectras......
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Bhp = (torque x revs)/5252.....if you want more bhp, juts move the existing torque further up the rev range (exactly what motor bike and F1 engines do).
The cams do work and there are dyno plots around to prove it, its more popular on Vectras and Cav/Calibras though.
The cams offer extra lift and longer duration......I suspect that the 2.5 might have been slightly throttled to give better low end torque and to make sure there was a decent differential between teh 2.5 and 3.0.
And as already said, this is exactly what was done to the 190bhp Vectras......
Would this be achieved best by chipping the car ?? i have some sports cats and an induction kit on order and am looking to have it chipped anyway to allow it to run to its best capabilitys so could incorporate it all in one go ??
Anyone know of a really good place in the south west that do chips, re-mapping etc...
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Would this be achieved best by chipping the car ??
It's the cams that determine how the engine breathes and it's how the engine breathes that determines where it makes the torque. The chip / ECU is just there to pour the right amount of fuel in and set the ignition timing so it's the cam change that'll make the most difference.
Certainly change the cams before you get it remapped or you'll have to start again. The rest of the induction / exhaust system is not a bottleneck on the 3.0 (save for the exhaust manifold which isn't great) so it will be less so on a 2.5.
I suspect that the 2.5 might have been slightly throttled to give better low end torque and to make sure there was a decent differential between teh 2.5 and 3.0
May well have had a worthwhile effect on fuel economy on the 2.5 too. Milder cams will give better intake velocity leading to more efficient fuel atomisation and combustion.
Kevin
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May well have had a worthwhile effect on fuel economy on the 2.5 too. Milder cams will give better intake velocity leading to more efficient fuel atomisation and combustion.
Kevin
Does that mean my fuel efficiency is going to go to the Dogs, once I fit my 3.0 cams? ;D