3.5 supercharging

[alastair_vns]

Hi has any1 fitted eaton m45 to their rv8. I am interested in fitting them to my 3.5 carb engine would like to know if there was much increase in power. Also has any 1 ran m45 with carbs? thanks

[kiwicar]

Hi
Not done it but I am pretty sure the m45 doesn't have the right seals for it to run in suck through mode, you could set it up to run blow through with a carb but it it would be difficult to get the right carbs these days (metro turbo sus would do it but not sure what size they were), a 4 barrel you would have to put in a sealed box, dooable but a right bodge.
Best regards
Mike

[alastair_vns]

What do you think would be the cheapest and easiest way to do this? Thanks

[kiwicar]

Hi, the M45 is the BMW mini one? it is far too small, you might get enough flow with 2 but still it will be operating out of it's best efficiency range, you want something off a similar sized engine, the one off the 3.2 or 4 litre jag is a better starting point. As for cheepest easiest set up, use a rover injection inlet manifold and controle it with a megasquirt ECU or extra EFI from Phill plumb it through an intercooler via a standard throttle body.
Mike

[topcatcustom]

If you had space then it could be quite a neat set up with twin M45's breathing through an SU each on a standard manifold, not the most efficient or potential set up by far- but should still give a massive increase. Just not much tuning potential. As Mike says they are too small by a long shot, 2 would just about be ok, if you want a single then you need an M112 ideally, or if wet then it'll have to be a big buck sprintex twin screw, or an old skool blower.

[alastair_vns]

Hi Ideally I want to keep carb setup, I have been looking on eba y but cannot seem to find much any other good sites?Thanks again

[topcatcustom]

If you want to keep your twin carbs then get a couple of M45's, (a pair of M90's may be too big for a 3.5) I'm sure you can modify SU's to use under pressure, where are you based?

[alastair_vns]

Hi what kind of modifications would need done to the sus? I am in glasgow. Thanks

[kiwicar]

Hi
for blow through you need to seal up the throttle shafts or put them in a sealed air box enclosing the carb (probably the best way) suck through you will have to sort out the seals on the charger.
Mike

[ChrisJC]

Or get some SU's from a Maestro or Montego Turbo as they were blow through.

Chris.