RE: Porsche 944 V8
Discussion
Interloper I design and develop engines for a living and V8s are my speciality, I've done a few "shoe horn" jobs before, I'd think quite hard before I did the conversion- as you obviously are!
Did you know for instance - that the good old Rover V8 lump has quite flexible rocker shafts and the cam timing is adversely effected about 4000 rpm- this seriously effects the power curve. Ask yourself- do you want to replace German fastidiousness with this? May be you do...
I have a detailed break down of engine weights too, availiable on request- the engine is not as light as some would have you believe....
To each their own...
Did you know for instance - that the good old Rover V8 lump has quite flexible rocker shafts and the cam timing is adversely effected about 4000 rpm- this seriously effects the power curve. Ask yourself- do you want to replace German fastidiousness with this? May be you do...
I have a detailed break down of engine weights too, availiable on request- the engine is not as light as some would have you believe....
To each their own...
Ok here's a link to a thread that has the detailed break down for the weight of the Rover V8.
http://e21.tricord.cjb.net/forum/view.php?view=4873
Don't get me wrong I don't mean to offend and I REALLY DO respect that great engine, but everything into context: when alot of time and engineering design effort has gone into one engine (the Porsche or BMW ones) - it pains me to see cost orientated venerable solutions replacing them.
There are OTHER solutions *L*
http://e21.tricord.cjb.net/forum/view.php?view=4873
Don't get me wrong I don't mean to offend and I REALLY DO respect that great engine, but everything into context: when alot of time and engineering design effort has gone into one engine (the Porsche or BMW ones) - it pains me to see cost orientated venerable solutions replacing them.
There are OTHER solutions *L*
I owned a Cobra 289 replica for quite a few years and I now own a 924s with the 2.5 litre four cylinder engine.
1) The Cobra was a fabulous car to drive mainly because of the flexibility of the tuned Rover V8 it ran, but also because every time you got in the car and drove it the noise was addictive, I found myself going for a drive just so I could listen to the engine. (if you haven't had a V8 you might not understand this ;-)
2) The 924 and 944 however have a rather dull engine, it's quite torquey, but lacks the soul of the V8 or the 911's flat six. They do however handle rather well on the track, and are extremely forgiving if you do something stupid like lift off mid-corner. On track days the 924 chassis can leave cars with twice the power standing on the twisty bits, (including some of the same age 911's)
So what if I could combine the handling of my 924s with the heart of the Cobra? That's why I'm very interested in the V8 conversion !!
1) The Cobra was a fabulous car to drive mainly because of the flexibility of the tuned Rover V8 it ran, but also because every time you got in the car and drove it the noise was addictive, I found myself going for a drive just so I could listen to the engine. (if you haven't had a V8 you might not understand this ;-)
2) The 924 and 944 however have a rather dull engine, it's quite torquey, but lacks the soul of the V8 or the 911's flat six. They do however handle rather well on the track, and are extremely forgiving if you do something stupid like lift off mid-corner. On track days the 924 chassis can leave cars with twice the power standing on the twisty bits, (including some of the same age 911's)
So what if I could combine the handling of my 924s with the heart of the Cobra? That's why I'm very interested in the V8 conversion !!
Hmm interesting and thanks for the link, would be good to know what the exact wet and dry weights of the 2.5 4 and the 928 V8 (including gubins) are in comparison. The problem you highlight is a concern but the 2.5 in standard tune runs out of puff befor 6k rpm. And its not as if the Rover does'nt respond to tuning all I'm after is about 240 bhp and a great sound track !
Ultimatley though I do not want to spoil the cars handling or driveability. Fortunatley I dont have to rush into this therefor I can do plenty of homework on the subject and I'm not even close to coming to a decision.
Ultimatley though I do not want to spoil the cars handling or driveability. Fortunatley I dont have to rush into this therefor I can do plenty of homework on the subject and I'm not even close to coming to a decision.
Marquis_Rex said:
Don't get me wrong I don't mean to offend and I REALLY DO respect that great engine, but everything into context: when alot of time and engineering design effort has gone into one engine (the Porsche or BMW ones) - it pains me to see cost orientated venerable solutions replacing them.
There are OTHER solutions *L*
I don't think Mr.X put the TWR unit in there for _cost_ reasons. I'm sure it went in there because it's a great engine. I'd love to know how much weight he saved over using the 4.n or 5.n litre Porsche 928V8 engine though...
Fox
---
P.S. This is just _such_ a cool way to recycle a 944 Lux!
>> Edited by neon_fox on Monday 10th May 00:42
The V8 engine sits 5 inches further back in the engine bay than the standard 2.5 block and when weighed dry was 10kgs lighter than the porsche lump.
Originally I was planning to blueprint and rebuild the 2.5 engine with a few tuned/Lightened pieces in the right areas.The cost to do this using all new bearings, rings, valve guides, seats etc and with myself doing all the machining work and balancing/assembly was working out at around £4k.
The car is only worth 3k at most (probably less as its heavily modified).
I did the whole conversion for just under £3k ( this now includes complete MSD Ignition, carrera gt scoop for the higher air filter due to the new tunnel ram manifold and adjustable coilover (only) rear suspension.
Originally I was planning to blueprint and rebuild the 2.5 engine with a few tuned/Lightened pieces in the right areas.The cost to do this using all new bearings, rings, valve guides, seats etc and with myself doing all the machining work and balancing/assembly was working out at around £4k.
The car is only worth 3k at most (probably less as its heavily modified).
I did the whole conversion for just under £3k ( this now includes complete MSD Ignition, carrera gt scoop for the higher air filter due to the new tunnel ram manifold and adjustable coilover (only) rear suspension.
Mr Xv8 said:
I did the whole conversion for just under £3k ( this now includes complete MSD Ignition, carrera gt scoop for the higher air filter due to the new tunnel ram manifold and adjustable coilover (only) rear suspension.
:O Woah!
Are you saying that Ignition, TWR lump, 968CS seats, WRC bits, turbo wings, GRP bonnet, 924 Carrera GTS lights, splitter, carbon rear wing, springs and shocks, 17" Cups and lightweight interior/mirrors etc. and titanium bits comes in at less than 3k!!!!
Even assuming you did all the labour and got trade rates on parts that is still unbelievably cheap! I'd expect to pay at least that for the engine alone!
Fox
---
964C2
well, here is a 928-in-944 for sale... probably would need a bit of work to put it on the road 
948 racecar
Heres what the ad reads (for those not fluent in danish)
:
*Blue
*Trackcar (SSC) aluminium cage
*Modified with 928 engine ca. 450 bhp
*Programmable injection-computer
*Call for price
(I guess the rear wing works great as a picnic table as well)
948 racecar
Heres what the ad reads (for those not fluent in danish)
: *Blue
*Trackcar (SSC) aluminium cage
*Modified with 928 engine ca. 450 bhp
*Programmable injection-computer
*Call for price
(I guess the rear wing works great as a picnic table as well
) If you use the 3L crank in a 2.5 block with the correct rods it will give you a 2.8
You need the correct rods to give you the correct compression ratio for either a turbo car or normally aspirated.
www.lindseyracing.com list the rods you need in their engine/trans section
You need the correct rods to give you the correct compression ratio for either a turbo car or normally aspirated.
www.lindseyracing.com list the rods you need in their engine/trans section
Mr Xv8 said:
The V8 engine sits 5 inches further back in the engine bay than the standard 2.5 block and when weighed dry was 10kgs lighter than the porsche lump.
Originally I was planning to blueprint and rebuild the 2.5 engine with a few tuned/Lightened pieces in the right areas.The cost to do this using all new bearings, rings, valve guides, seats etc and with myself doing all the machining work and balancing/assembly was working out at around £4k.
The car is only worth 3k at most (probably less as its heavily modified).
I did the whole conversion for just under £3k ( this now includes complete MSD Ignition, carrera gt scoop for the higher air filter due to the new tunnel ram manifold and adjustable coilover (only) rear suspension.
Hi Originally I was planning to blueprint and rebuild the 2.5 engine with a few tuned/Lightened pieces in the right areas.The cost to do this using all new bearings, rings, valve guides, seats etc and with myself doing all the machining work and balancing/assembly was working out at around £4k.
The car is only worth 3k at most (probably less as its heavily modified).
I did the whole conversion for just under £3k ( this now includes complete MSD Ignition, carrera gt scoop for the higher air filter due to the new tunnel ram manifold and adjustable coilover (only) rear suspension.
Sorry but I just cannot see those weight figures....can you give both ..exactly please ??
I cannot see how an ALL ALUMINUM Porsche V8 is heavier than an IRON BLOCK Rover V8 ?????
All the best Brett
Edited by Brett928S2 on Sunday 2nd December 14:44
Brett928S2 said:
Mr Xv8 said:
The V8 engine sits 5 inches further back in the engine bay than the standard 2.5 block and when weighed dry was 10kgs lighter than the porsche lump.
Originally I was planning to blueprint and rebuild the 2.5 engine with a few tuned/Lightened pieces in the right areas.The cost to do this using all new bearings, rings, valve guides, seats etc and with myself doing all the machining work and balancing/assembly was working out at around £4k.
The car is only worth 3k at most (probably less as its heavily modified).
I did the whole conversion for just under £3k ( this now includes complete MSD Ignition, carrera gt scoop for the higher air filter due to the new tunnel ram manifold and adjustable coilover (only) rear suspension.
Hi Originally I was planning to blueprint and rebuild the 2.5 engine with a few tuned/Lightened pieces in the right areas.The cost to do this using all new bearings, rings, valve guides, seats etc and with myself doing all the machining work and balancing/assembly was working out at around £4k.
The car is only worth 3k at most (probably less as its heavily modified).
I did the whole conversion for just under £3k ( this now includes complete MSD Ignition, carrera gt scoop for the higher air filter due to the new tunnel ram manifold and adjustable coilover (only) rear suspension.
Sorry but I just cannot see those weight figures....can you give both ..exactly please ??
I cannot see how an ALL ALUMINUM Porsche V8 is heavier than an IRON BLOCK Rover V8 ?????
All the best Brett
Edited by Brett928S2 on Sunday 2nd December 14:44
Brett928S2 said:
Hi
Sorry but I just cannot see those weight figures....can you give both ..exactly please ??
I cannot see how an ALL ALUMINUM Porsche V8 is heavier than an IRON BLOCK Rover V8 ?????
All the best Brett
The Rover V8 is ALL aluminium , not an iron block & the 928 engine is very heavy considering its all aluminium (16v or 32v), IIRC a late model small block Chevy with iron block & ally heads weighs less than a 928 engine (from the Chevy/928 conversions in the USA)Sorry but I just cannot see those weight figures....can you give both ..exactly please ??
I cannot see how an ALL ALUMINUM Porsche V8 is heavier than an IRON BLOCK Rover V8 ?????
All the best Brett
Brett928S2 said:
Mr Xv8 said:
The V8 engine sits 5 inches further back in the engine bay than the standard 2.5 block and when weighed dry was 10kgs lighter than the porsche lump.
Originally I was planning to blueprint and rebuild the 2.5 engine with a few tuned/Lightened pieces in the right areas.The cost to do this using all new bearings, rings, valve guides, seats etc and with myself doing all the machining work and balancing/assembly was working out at around £4k.
The car is only worth 3k at most (probably less as its heavily modified).
I did the whole conversion for just under £3k ( this now includes complete MSD Ignition, carrera gt scoop for the higher air filter due to the new tunnel ram manifold and adjustable coilover (only) rear suspension.
Hi Originally I was planning to blueprint and rebuild the 2.5 engine with a few tuned/Lightened pieces in the right areas.The cost to do this using all new bearings, rings, valve guides, seats etc and with myself doing all the machining work and balancing/assembly was working out at around £4k.
The car is only worth 3k at most (probably less as its heavily modified).
I did the whole conversion for just under £3k ( this now includes complete MSD Ignition, carrera gt scoop for the higher air filter due to the new tunnel ram manifold and adjustable coilover (only) rear suspension.
Sorry but I just cannot see those weight figures....can you give both ..exactly please ??
I cannot see how an ALL ALUMINUM Porsche V8 is heavier than an IRON BLOCK Rover V8 ?????
All the best Brett
Edited by Brett928S2 on Sunday 2nd December 14:44
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