New Bits For The Supercharged Bananna

[CA Automotive UK]

Received these upgrades today for our s/charged Demo M3 :

- 8 rib drive pulley system to prevent belt slip with new compressor (oem is 6 rib)
- larger 81 trim compressor
- redesigned intake manifold

will be fitting these over next week, should make a great car even beter :)

She is going very weel indeed, last weekend at Brunty the speedo needle went right off the clock ( and I mean right off, nearly to the "M" logo ), will have vids soon. Would have them now but there was aproblem with the harddrive ...:((

[adood84]

glad to hear that you took vids :) , why not fit a new speedo?

[mystic sport]

Bloody hell Roy, that is seriously fast :eek: . To get it that quick at up the straight requires mad BHP. I gotta see this car in the metal soon.

[M3-SC-AL]

Cool, Pulleys look wicked, may have get a set... Damn it the list keeps growing..

Roy did you get any vids of when I was over ie, the james bonds style slide in your car when I was with you.

let us know how you get on with those bits

[MEGA]

Would love to see the car in the flesh

(Or in the Steel, perhaps)

[CA Automotive UK]

hey Al

do you mean when i completely overcooked the hairpin at about 90 mph and me and you ended up doing about three 360 degree spin slides ? :D :D ...i am gutted but no the bloody camera did not record at that point for some reason ...just a load of static, I dont think the hard drive is designed for those kind of stealth fighter G forces :)

BTW ...my pants took ages to clean after that :)

I did get Justins awesome slide past the Jumbo on film ...just. Will post up asap .

[M3-SC-AL]

Gutted, yer not really suprised the hard drive packed up, considering I nealry had to peel my face off the side window lol .

Glad you got Justins slide, da boy got skills :cool:

hopefully next time I go back my car will play the game, lets us know how you get on with that manifold though, be intresting so if it makes the differance

laters

[CA Automotive UK]

Would love to see the car in the flesh

(Or in the Steel, perhaps)

see here guys :)

http://forum.evotechnik.net/showthread.php?t=10804

[andbecks]

What size pulleys are the stage 3 running ??
Andy

[Moe]

WOW this car just gets better and better

[CA Automotive UK]

What size pulleys are the stage 3 running ??
Andy

hi andy

the supercharger pulley is 70 mm ( st2 is 75 mm) to give a boost of 8.5- 9.5 psi.

the rest of the new 8 rib engine pulleys are all OEM size , just with 2 more ribs width for better belt grip all round and avoid belt slip in severe use/ heat.

[Auryn]

i must say Roy, as much as im sure we all appreciate you sharing this information & the mods look way cool and will no doubt be impressive...but white silk sheets?? hmmm bit more information than we need dude....lol

[andbecks]

very nice Roy... was wondering if you'd gone for the 8 rib yet :eek:

[CA Automotive UK]

i must say Roy, as much as im sure we all appreciate you sharing this information & the mods look way cool and will no doubt be impressive...but white silk sheets?? hmmm bit more information than we need dude....lol


i have it within my power to ban people you know .....:D

[lee330sport]

So whats the difference between the 2 manifolds? From the pics it looks like the new one is a little more angular than the origional, surely thats not a good thing? Although i havent seen many good pics of an origional.

And what do you mean by new 81 trim compressor? More boost?

Looking very nice though:D Now for new internals and a higher rev limit.:cool:

[CA Automotive UK]

i had same thoughts about the manifold Lee...will report back soon as we have it all fitted.

[G60 VV]

How does the pulley's having 2 extra rib's prevent slip'ge???

The pulley's on my G60 are the same and am just about to fit a toothed belt pulley kit, this is the only sure way to prevent any slip'ge.

Pictured was the kit I had, and have now changed it to a kit with guides on all the pulleys to prevent the belt from being able to wander.

http://i25.photobucket.com/albums/c77/k1mac/Rallye%20Pics/Rallye%20resto/IMG_0025.jpg

Design of new kit

http://www.rp-motorsport.de/en/images/glader/spezialzahnriemen_alu.jpg

[lee330sport]

That toothed kit looks a top idea.....next job Roy:) . Adding a few more ribs usually does do the job as the surface area on the belt is slightly bigger.

[CA Automotive UK]

Because the pulley and belts are wider then the load is spread over a wider area = more grip = less slipage. Especially considering we use quite a small diameter pulley at the supercharger end.

Toothed belts typically only really work well at comparatively low stress/ boost applications, otherwise they can suffer from excessive noise, stripped teeth and tend to require adjusting more often. They can also only accomodate relatively large pulley diameters. Would not last 5 mins on a 70 mm pulley :)

All "big power" supercharger kits tend to use the ribbed Poly - Vee system for this reason.

Please dont misunderstand me G60 as I am in no way disrespecting you or your scar's set up,it's just our two requirements and specs are quite different :D

all the best

[G60 VV]

no worries, wasn't thinking any disrespect;)

At the moment I am running a 68mm pulley and will be running the same size toothed, may go down to a 65mm next year or when I get my charger to R1 spec, full blend. The other sizes of pulleys which are used are 63, and 57 and 55, the latter being used by crazy germans:eek: :D
On my set up there is no requirement for any adjustment once fitted as I use a spring tensioner, although some use solids there should still be no adjustment.

It is true what you say about the noise they give of, they have quite a manacing sound, especially when combined with the sweet growl of a G Lader charger:D absolutly love drving down the road and seeing folks faces when they hear it coming, thinking "What the fcuk is this coming down the road" :D :D would love to get a shot/spin/hear what an S/C'd M3 sounds like:eek:

[CA Automotive UK]

57 mm pulley on a toothed belt :eek:
damn I must be out of date on this stuff then

used to supercharge Alfas back in the early 90 s and back then a 75 mm pulley was hard enough to drive on a toothed system without problems :)

you are right tho ...they can sound mean as hell :)

[G60 VV]

sorry my bad, not sure if ze crazy germans run the smaller pulley's toothed, but probalby:eek: :eek:

[M3-SC-AL]

Im liking that idea of a toothed belt, wouldnt care about the noise... hmmmm

G60 whats the specs on your dub id be quite intrested especially the rallye.