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[vauxfan2k]

I have a big block chrysler V8 from a classic car that ive just broke, its the 6.3l with auto box, now 2 questions, will it physically fit under the bonnet of the omega? and should I stick with the auto box or try and mate it to my ar35 manual box? assuming a bellhousing and flywheel will need to be sought.

there is no engine in the omega as the belt went taking the top end with it, so hence my asking.

cheers 

[cem_devecioglu]

gm ls1 5.7 litre fits in the limit not sure for 6.3 litre..

but v8 engines create considerable torque so imo its better you use its original autobox..

[Brikhead]

I have a big block chrysler V8 from a classic car that ive just broke, its the 6.3l with auto box, now 2 questions, will it physically fit under the bonnet of the omega? and should I stick with the auto box or try and mate it to my ar35 manual box? assuming a bellhousing and flywheel will need to be sought.

there is no engine in the omega as the belt went taking the top end with it, so hence my asking.

cheers 

In answer to your two questions, firstly, the engine may fit... once the multiram system and the radiators are out of the way it's amazing how small the 3.0 v6 looks in an Omegas engine bay, a few minutes spent using a tape measure should confirm it.

Secondly the ar35 is an automatic box.

[Elite Pete]

It depends on how much BHP and Torque an old 6.3L V8 puts out to how much work its going to take (loads I suspect) I would fit a 3.0 back in there

[vauxfan2k]

sorry ar 35 box was in my old omega estate, this is deffo a 3.0 manual box, 3.0 engines are hard to come by up here, not to mention they are getting a good price seeing as ppl as jamming them into astras etc now 

Since I have the v8 already and to be different to all the others i would prefer that route.

plus it will sound awesome. 

[cem_devecioglu]

sorry ar 35 box was in my old omega estate, this is deffo a 3.0 manual box, 3.0 engines are hard to come by up here, not to mention they are getting a good price seeing as ppl as jamming them into astras etc now 

Since I have the v8 already and to be different to all the others i would prefer that route.

plus it will sound awesome. 

you may change your idea  at the fuel station

[vauxfan2k]

its a second car, and will be lucky to cover a couple of hundred miles a year when back on road, its not for daily use lol

[Marks DTM Calib]

Cant see a big block fitting to be honest, a small block chevvy is a tight squeeze

[Andy H]

sorry ar 35 box was in my old omega estate, this is deffo a 3.0 manual box, 3.0 engines are hard to come by up here, not to mention they are getting a good price seeing as ppl as jamming them into astras etc now 

Since I have the v8 already and to be different to all the others i would prefer that route.

plus it will sound awesome. 

The 3.0 litre V6 had either the AR35 auto box (Automatic/Rear wheel drive) or the R28 manual.

I'm guessing that the big block engine has a carburettor? The Omega auto box needs rpm & load signal from the ECU. IIRC the R28 manual box is rated at 280Nm torque which might be a bit weak for the big block :-/

[AlistairK]

The problem you are going to have is getting it to pass an MOT test.

All Omegas were built after the 1992 requirement for catalytic converters and very tight emission testing.

The 383 mopar is a 1950s engine design which stopped in 1970 with a non-feedback carburettor and a fair amount of cam overlap (by modern standards).  No chance will it meet emissions and there were no EFI or other versions you could pirate cheaply to do it.

What car is it you are breaking BTW?  I am working on a project 1968 Plymouth Fury and would be interested in any parts I can use on mine.

Assuming you can get past the emissions problem (you may be able to re-register the car on a Q plate and thus the emission requirement is based on the age of the engine not the age of the car - however this way you will need to go through an IVA test like kit cars have to) then the 383 has a number of virtues which the small block Chevy doesn't

For example the 383 has its distributor at the front on the 383 which means you can tuck the engine up against the firewall pretty tight whereas the CHevy is rear mounted and fouls wiper assemblies, heaters and anything else you may have back there.

As I recalll the headers on the B and RB motors can go pretty much straigh down whereas on the Chevy they come out wider first because of the spark plug angle (adding width to the install)

I have to admit I'm into the idea of a V8 Omega as the V6 is so uneconomical what the heck!  I was thinking of a modern EFI V8 from a late Chevy SUV or maybe a Lexus.

[aaronjb]

The problem you are going to have is getting it to pass an MOT test.

All Omegas were built after the 1992 requirement for catalytic converters and very tight emission testing.

The 383 mopar is a 1950s engine design which stopped in 1970 with a non-feedback carburettor and a fair amount of cam overlap (by modern standards).  No chance will it meet emissions and there were no EFI or other versions you could pirate cheaply to do it.

What car is it you are breaking BTW?  I am working on a project 1968 Plymouth Fury and would be interested in any parts I can use on mine.

Assuming you can get past the emissions problem (you may be able to re-register the car on a Q plate and thus the emission requirement is based on the age of the engine not the age of the car - however this way you will need to go through an IVA test like kit cars have to) then the 383 has a number of virtues which the small block Chevy doesn't

For example the 383 has its distributor at the front on the 383 which means you can tuck the engine up against the firewall pretty tight whereas the CHevy is rear mounted and fouls wiper assemblies, heaters and anything else you may have back there.

As I recalll the headers on the B and RB motors can go pretty much straigh down whereas on the Chevy they come out wider first because of the spark plug angle (adding width to the install)

I have to admit I'm into the idea of a V8 Omega as the V6 is so uneconomical what the heck!  I was thinking of a modern EFI V8 from a late Chevy SUV or maybe a Lexus.

Not a problem, per the MOT manual:

Vehicles Fitted with a differnt engine

Test according to which is older, engine or vehicle.
e.g. A 1995 car fitted with a 1991 engine (of whatever make), test to 1991 standards for emission purposes.

Note: The onus is on the vehicle presenter
to prove engine age.

[Brikhead]

I am working on a project 1968 Plymouth Fury

Nice car, I really like the earlier 'Christine model' that would be a cool car to own!

[AlistairK]

Not a problem, per the MOT manual:

Vehicles Fitted with a differnt engine

Test according to which is older, engine or vehicle.
e.g. A 1995 car fitted with a 1991 engine (of whatever make), test to 1991 standards for emission purposes.

Note: The onus is on the vehicle presenter
to prove engine age.

Aha, I thought that only applied to vehicles re-registed on a Q plate.

That does open up more posibilities then.

[AlistairK]

I am working on a project 1968 Plymouth Fury

Nice car

it will be, one day, I hope...

[2woody]

Note: The onus is on the vehicle presenter
to prove engine age.

this means :-

either a letter from the vehicle manufacturer.

or a copy of the V5 from the "donor" car.

no other evidence is acceptable