Has anybody ever tried PMO Carbs or similar on their RS?
- Thread starter BlueNGT
- Start date
38F3E1
PCGB Member
Nothing to stop them being used on 3.6 engines.
Bruce Anderson in his performance handbook talks about a 964 engine running 46 IDA Webbers (substitute with PMOs which he also talks about in the book), racing headers, mild cam upgrade and some electronic ignition tweaks making 319BHP. If I ever have to rebuild my standard 964 engine this is the route I intend to go.
Ian.
Bruce Anderson in his performance handbook talks about a 964 engine running 46 IDA Webbers (substitute with PMOs which he also talks about in the book), racing headers, mild cam upgrade and some electronic ignition tweaks making 319BHP. If I ever have to rebuild my standard 964 engine this is the route I intend to go.
Ian.
SimonExtreme
New member
Surely carbs can never provide as accurate fueling as a decent injection system. Early injection systems might have been no better or even worse than carbs buit rather than spend the money on carbs, I am sure you would get a much better return by using a mappable ECU.
paul howells
New member
Pmo is good kit,a close friend runs them.Pmo will jet the carbs to suit,they are nearly as good as injection while new,how ever when a couple of years old they wear and leak air etc,so a service would be needed.You will also need a carb manifold,which PMO supply with all gaskets etc.
For a 964 i would go down the route of Jenvey throttle bodies,problem then is you need motec or similar, gets expensive.It can be done for sensible money.Motec can be purchased second hand now,colin at 9m may even have a used unit or of course new etc
Have a look at my engine at oulton in march,it looks neat,sounds great and revs like a bike engine.
Pound for pound PMO is good value.
Not sure why you want to fit carbs,more power?
For a 964 i would go down the route of Jenvey throttle bodies,problem then is you need motec or similar, gets expensive.It can be done for sensible money.Motec can be purchased second hand now,colin at 9m may even have a used unit or of course new etc
Have a look at my engine at oulton in march,it looks neat,sounds great and revs like a bike engine.
Pound for pound PMO is good value.
Not sure why you want to fit carbs,more power?
BlueNGT
New member
I've never thought about it myself...a friend saw the set-up on a modified Carrera Sport engine (3.4 ltr etc) and asked if it could be applied to a 964.
The increased power figure claimed seemed large just for changing to Carbs but the cost compared to Motec/Cams/heads was in its favour.
If it were something for me to consider it would be for power, but I would have to see some dyno charts of an engine or two that had already had them fitted.
The question that came to mind was if it offer such large increases in power how come the likes of Colin dont use them!?
I will make sure I take a look at your engine at Oulton.
The increased power figure claimed seemed large just for changing to Carbs but the cost compared to Motec/Cams/heads was in its favour.
If it were something for me to consider it would be for power, but I would have to see some dyno charts of an engine or two that had already had them fitted.
The question that came to mind was if it offer such large increases in power how come the likes of Colin dont use them!?
I will make sure I take a look at your engine at Oulton.
38F3E1
PCGB Member
I would not have thought fitting carbs makes any more power on its own. Of the changes quoted from BA it's the other changes which are likely to increase the power by making the engine breath and flow better. The carbs are just a simple way to pour the petrol into the engine (sod emissions and fuel economy eh?).
Something like MOTEC is always going to be a more sophisticated solution but carbs do have a certain sound and mechanical feel to them which can appeal to folks who drive early cars.
Ian.
Something like MOTEC is always going to be a more sophisticated solution but carbs do have a certain sound and mechanical feel to them which can appeal to folks who drive early cars.
Ian.
SimonExtreme
New member
As said above, getting flow is the first thing and then getting more fuel to match the flow is where the gain is made. One without the other is pointless. I can see that carbs would be a cheap way of getting more/better fueling than the standard DME but I suspect you would still be leaving a fair bit "on the table" compared with a good mappable ECU and a set up like Paul's. Pauls Jenvey throttle bodies and throttle arrangement are a work of art and for the right tune of engine, are the muts nuts. Some say it's not worth going for those throttle bodies unless you have done head and cams, others disagree!
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