Supercharging a Wedge
Discussion
maston said:
Hi Mark,
Blimey, just had a brain wave, I might Supercharge my 390
What would it be, a couple of grand ???
Good enough a question to start a new topic methinks!Blimey, just had a brain wave, I might Supercharge my 390
What would it be, a couple of grand ???
If you're going to supercharge then the Sprintex S102 on the 390 is ideal. The Sprintex is well-matched to a 4l engine capacity and max revs.
You'll need:
- A sprintex (off eBay or the like) - £400 to £800
- Plenum with throttle body chopped off and throttle body on a separate mounting.
- A bunch of brackets to mount the blower onto the engine
- Pulley to drive it off the crank
- A modified ECU to chuck in more fuel (adjustable is better)
If you can get an ex-rover (or Range Rover) blower plus pipes and brackets that will save most of the engineering.
Also:
- the air meter will need moving usually (and a bracket made to fix it onto)
- and maybe the expansion tank
- thicker head gaskets - composite will do.
That's probably a start and will relieve you of the best part of £1500, so quite good value really.
I'm sure Mr Zig and Tony (Chedder) can chip in with a few thoughts...
Take a look at the FAQ articles SX Technical Data and Zig's thread on Blowing Delilah....
Just seen this on the flea:
http://www.ebay.co.uk/itm/Rover-V8-Supercharger-Sp...
Buy it now - £700 and it has all you need barring the modified ECU and a few brackets for the air meter and ancillaries. Baargin!
Edited by adam quantrill on Thursday 5th September 21:57
Good thread Adam..It does look a dam sight easier blowing a V8 then a V6..Fabricating can be stupid expensive!..Admittedly mine was an arm..A leg and some ribs as it was being made by the people who designed the kit but pound for lb its got to be the best power upgrade you can spend on.
Having a sound engine is the key as any weaknesses will be exaggerated by the extra pressure, I have oil coming from the front crank seal now where as i did not before the blower was fitted...This could of been caused by a number of occourances..
1. A weak seal to begin with.
2. The seal being disturbed by the fitment of the S/C crank pulley.
3. Way too much boost causing over pressure in the engine and possibly leading to an expensive engine failure!
Hopefully mine is either of the first two as im only running low-mid boost..(6psi max)..Although i say ONLY it still can cause issues on a weak engine.
...."Poo..I gotta get that sorted"....
A supercharger actually gives you a better fuel economy unless you have a wooden right leg and a lead boot on the end of it...Like me...
However just as economical as it is it can also speed up the wear on all engine components if driven hard all the time.......Perhaps it's time to fit the sponge boot!
So the moral is..."If you wanna have more fun..Get a blow job"....Eeerrr...I mean a blower job..Too late..The buttons has been pressed...
Having a sound engine is the key as any weaknesses will be exaggerated by the extra pressure, I have oil coming from the front crank seal now where as i did not before the blower was fitted...This could of been caused by a number of occourances..
1. A weak seal to begin with.
2. The seal being disturbed by the fitment of the S/C crank pulley.
3. Way too much boost causing over pressure in the engine and possibly leading to an expensive engine failure!
Hopefully mine is either of the first two as im only running low-mid boost..(6psi max)..Although i say ONLY it still can cause issues on a weak engine.
...."Poo..I gotta get that sorted"....A supercharger actually gives you a better fuel economy unless you have a wooden right leg and a lead boot on the end of it...Like me...
However just as economical as it is it can also speed up the wear on all engine components if driven hard all the time....
...Perhaps it's time to fit the sponge boot!So the moral is..."If you wanna have more fun..Get a blow job"....Eeerrr...I mean a blower job..Too late..The buttons has been pressed...
Hi Zig, I can't help but think that your crankcase pressurisation issues could be caused by one of two different things - or a combi of both.
1) Ring blowby - your engine is worn and the extra pressure in the cylinder is getting past the rings and pressurising the crankcase.
2) Installation issues - There may be a breather from the crank case that would normally feed into the inlet system at the top end but after the throttle, in a normally aspirated engine this would be at a vacuum most of the time and would purge oil fumes etc. from the crank case and prevent the crankcase becoming pressurised. Even at full throttle the restrictions in the throttle body etc would be at a partial vacuum with respect to the atmosphere.
BUT if this breather is now in the pressurised air after the blower then whenever the pressure is above atmospheric the crankcase would be being pressurised with respect to the atmosphere and would force oil past the crankcase seals etc.
The cure would be to block the standard breather and to route a breather from the crank case into the inlet system before the blower, this is your best chance of a partial vacuum.
You could do what the racers do and take the breather from the crankcase into a bottle that will catch the oil mist.
I don't know enough about the V6 engine setup to know where the inlet breather is but most engines have them.
Russ
1) Ring blowby - your engine is worn and the extra pressure in the cylinder is getting past the rings and pressurising the crankcase.
2) Installation issues - There may be a breather from the crank case that would normally feed into the inlet system at the top end but after the throttle, in a normally aspirated engine this would be at a vacuum most of the time and would purge oil fumes etc. from the crank case and prevent the crankcase becoming pressurised. Even at full throttle the restrictions in the throttle body etc would be at a partial vacuum with respect to the atmosphere.
BUT if this breather is now in the pressurised air after the blower then whenever the pressure is above atmospheric the crankcase would be being pressurised with respect to the atmosphere and would force oil past the crankcase seals etc.
The cure would be to block the standard breather and to route a breather from the crank case into the inlet system before the blower, this is your best chance of a partial vacuum.
You could do what the racers do and take the breather from the crankcase into a bottle that will catch the oil mist.
I don't know enough about the V6 engine setup to know where the inlet breather is but most engines have them.
Russ
Thanks Russ, That was a fear not so long ago..The engine had a full re-build around 5-6 years ago, It never did any real mileage after that and i was assured it had all new pistons, Rings, bearings, Oil pump and seals, Although nothing is enforced by a build report of any description...I do have a PCV valve that connects to the O/S rocker cover from the plenum which i was thinking might be getting pressurised at boost as its easy to blow air passed the acclaimed one way valve..I have thought about tapping into the intake pipe of the charger post throttle body or at least try a catch tank first and as you say cap off the plenum intake.
The S102 kit that i have was initially designed to run on a standard CR engine, It has a purpose built WUR/PR that was specifically built for this application only, There was no modification as to the CCP.
I also have an atmospheric filler cap breather but i have fitted one with an outlet so oil does drip in very small amounts from that..
Q. Could i feed the breather outlet from the filler cap and the crankcase breather on the rocker cover to the same catch tank?.
Or should i replace the filler cap with one that does not have the breather outlet?.
Q2. Would it be better to have the crankcase breather plumbed into the intake pipe and just a small catch tank for the filler breather?.
This was the set up on the sierra 2.8i that the kit was designed for.
My plenum is still in its original position and not been turned 180 as in the pic...My blower exhaust in is slightly longer but didnt think that would make a huge difference if any at all.
Cheers...Ziga
The S102 kit that i have was initially designed to run on a standard CR engine, It has a purpose built WUR/PR that was specifically built for this application only, There was no modification as to the CCP.
I also have an atmospheric filler cap breather but i have fitted one with an outlet so oil does drip in very small amounts from that..
Q. Could i feed the breather outlet from the filler cap and the crankcase breather on the rocker cover to the same catch tank?.
Or should i replace the filler cap with one that does not have the breather outlet?.
Q2. Would it be better to have the crankcase breather plumbed into the intake pipe and just a small catch tank for the filler breather?.
This was the set up on the sierra 2.8i that the kit was designed for.
My plenum is still in its original position and not been turned 180 as in the pic...My blower exhaust in is slightly longer but didnt think that would make a huge difference if any at all.
Cheers...Ziga
Edited by mrzigazaga on Friday 6th September 00:01
Here is how we supercharged one 350i at Sporttiauto:
See walk around video at:
https://www.facebook.com/Sporttiauto
Is it 350SCi or 350iSC now?
See walk around video at:
https://www.facebook.com/Sporttiauto
Is it 350SCi or 350iSC now?
king awesome....
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