Was a Paxton supercharger conversion, now a Rotrex C38-91

stevieturbo · Post by **stevieturbo** » Mon Dec 31, 2012 6:44 pm

IC doesnt specifically need a fan. Spal make great slimline fans. Try and cover as much area as you can on the rad, and a big single is generally better than two smaller items.

Or one large one small. And pullers are more efficient, but you're going to end up with pullers anyway.

Ive a 16" single Spal, and a small 6" or 7" motorbike fan on mine

Post by **Coops** » Mon Dec 31, 2012 7:53 pm

cheers mate,
the cooling fan is long way off yet but will take this on board regarding sizes,

Post by **Coops** » Tue Jan 01, 2013 6:16 pm

another thing,
should i stick with the twin plenum? as room maybe tight for pipe work, or sell it on and get a single but larger plenum?? and ported base to match?

stevieturbo · Post by **stevieturbo** » Tue Jan 01, 2013 6:23 pm

If you're using boost and blowing into the plenum, the twin plenum will be of no benefit whatsoever.

Regular single will be more than adequate.

Post by **Coops** » Tue Jan 01, 2013 6:34 pm

looks like im going to have a twin plenum for sale too then lol

stevieturbo · Post by **stevieturbo** » Tue Jan 01, 2013 6:37 pm

If selling it simplifies installation and gets you a few quid, then absolutely sell it. The money can be better spent towards things that will benefit you.

Wotland · Post by **Wotland** » Wed Jan 02, 2013 9:42 am

Coops wrote:another thing,
should i stick with the twin plenum? as room maybe tight for pipe work, or sell it on and get a single but larger plenum?? and ported base to match?

One of mine friend installing a Rotrex on his 4.6 TP :

Post by **Coops** » Wed Jan 02, 2013 6:00 pm

OOOO any more pics please Dimitri?
What bracket kit is he using? home made or an off the shelf bracket, for the RV8?
Which rotrex he using? im looking at the C38-81

Post by **Coops** » Sun Jan 06, 2013 7:55 pm

well bit the bullet today and started to sort the RS500 cossie intercooler out,
had to trimm about 40mm off both brackets, but it now fits where i want it to go,
need to scallop the back face of the slam panel for the cooler pipes so i can lift it into the hump on the slam panel, bottom of the valance has a couple of flat brace lugs that need cutting off which means i can then push the inter cooler right into the front grill right behind the oil coolers, i should then have just enough room to drop the rad in between the intercooler and front valence,

Wotland · Post by **Wotland** » Mon Jan 07, 2013 8:05 am

Coops wrote:OOOO any more pics please Dimitri?
What bracket kit is he using? home made or an off the shelf bracket, for the RV8?
Which rotrex he using? im looking at the C38-81

Hello Tony,

Brackets are custom billet CNC aircraft aluminum.

other pictures :

Post by **Coops** » Mon Jan 07, 2013 4:34 pm

cheers mate, hope mine looks as nice as this once done,

Post by **Coops** » Mon Jan 07, 2013 5:56 pm

Oil breathers?
what has everyone that has blown there RV8's taken them too?
direct to the intake hose before the charger?
or a catch can??
sorry all new to me,

stevieturbo · Post by **stevieturbo** » Mon Jan 07, 2013 8:16 pm

Breathers are no different to any other engine.

In an ideal world yes you could recirculate. If you have adequate oil/air separation, then there is no negatives to doing so.
In reality, getting totally clean air back out is pretty hard.

Just vent to a suitable breather/catch can, although strictly speaking that isnt MOT friendly.

Post by **Coops** » Sun Jan 13, 2013 12:41 pm

may vent to a catch can then back to the intake before charger to keep mot man happy lol.

JP. · Post by **JP.** » Sun Jan 13, 2013 4:53 pm

Coops wrote:may vent to a catch can then back to the intake before charger to keep mot man happy lol.

Thats how I do it on our Supercharged Capri and on our Turbocharged Capri.
The backfire valve does its thing when needed and is still in place on the valve cover. Got myself a big catchcan ( about 2 liter) which does the job.
Has nothing to do with MOT but without a decent PCV system you'll loose horsepower ( did test that on a dyno..) You'll need to suck up that pressure below the pistons.

On our tripple carb't Capri whe only have vents on both valve covers and we allready found out on the dyno we loose presious BHP here so it will be converted to run an electrical PCV vacuum pump from a Ford Mustang to recieve it back.

Sorry to much toys at the moment....