suck through supercharger set up advise please gents.
Turbo Mini Forums

Can I have your thoughts on what a nice boost level is for a road use supercharger blow through set up would be, i.e what size pulley would achieve this ?. It will be a weekend toy, but I want it to be nice to drive, and not be right at the limits, so it needs a strip down every year. Plus is a grey cover to much for the set up. And what sort of carb needle would be good. I know that's a hard one to answer and is really one for the rolling road. But I need something nearish to thorugh in while I wear the engine in prior to getting it fully set up.

What I'm going for build spec wise is (and mainly have & have done now), is 1293 turbo engine fully rebuilt to make sure it's totally up to the job, cam6581 turbo crank, rods balanced and stress relieved, all new bearings throughout. Big centre main strap, Arp bolts throughout, Omega 15cc pistons, morspeed head, to achieve 8.1 cr with the pistons, with race valves & porting etc (the usual basically) + 11 stud. vmax scart 265 supercharger specific cam + titan 1.5 full roller rockers. Eaton s/charger (brand new, so should take some abuse for a while), hiff44 carb (fully rebuilt), with vmax anti ice filter. Vmax charger cooler, fully rebuilt box with a new straight cut kit, 4 pin diff, central pick up, and straight cut drops, 3.2 final drive. Full pre-verto set up & ultralight flywheel and back plate with the toughest clutch I can get before going up to a paddle (hate them in road cars). 2 core 5 rad. And all the little add on bits & tricks that make as tough as it is possible to get the set up.

thats an impressive spec, whos supercharger kit are you going to use?
id say megajolt , oil fed thrust bearing , an RTS clutch and minispares carb stubstack would be worth considering.

im not sure about the morspeed head though as thay seem to be crap at customer service. im sure Mr benross makes superior products at much better prices that is unless you allready have the morspeed head.

Edited by MONSTER HEDGEHOG on 8th Jan, 2010.

Hi, thanks for the tips on the other bits and bobs. Something I will look in-to, as I want it to be a reall goof set up.

I pick up the head from Morspeed within the next week, but yes getting hold of them via the phone is an absolute night mare. Everything else I have with the exception of the charger cooler and anti-ice filter. Which I need to order, so the spec of engine gubbings is set now.

The charger set up was not a kit. It's a one off bespoke custom jobby. I saw the jonspeed one in the flesh and to be frank, my 3 year old could have done better if I gave him a welder !. I must say though that the v-max version looks a look better though. But Im happy with mine, as it's stainless & customer polished etc, so that little bit different from the norm.

Good luck getting you head!

Edited by wil_h on 8th Jan, 2010.

Fastest 998 mini in the world? 13.05 1/4 mile 106mph

With a Jonspeed bottom pulley and a standard supercharger I see a little under 10psi. I have a cooper pipe from b&q plumbed in to the heater hose and jubilee clipped to my intake pipe and dont seem to have any icing issues.(bit of a bodge but works well)

Mr. Prawn, the friendly Crustacean- slowly making steps towards forced induction.

I'll be putting 12 PSi through my suck throuch charger setup, but I won't be running an E45 (Toyota SC12 instead). From what I have read, the eatons aren't efficient at 12 psi and make much the same power with more driveablitity at 7-10 psi.

I'll be using an MED stage 3 head that has worked chambers by Benross (8:1 CR) and the VMAX 274 Cam, so it will be interesting to see what power you make.

My bottom end will be a rebuilt, balanced standard engine - wonder how long that will last lol

I like 9-10Psi

I run a supercharger and I don't care the TB is on the wrong side.
VEMS + 12 PSI + Liquid Intercooler = Small Bore FUN!

I don't want to go into a slagging match, but I can honestly say that the heads Simon do are very good.

I don't think anyone would despute that, the head he did for me was stunning. However, it was't what I asked for. In fact when I went to pick it up he hadn't done it and sold me the head he had done for you (vegard).

Lovely work, crap business sense.

Fastest 998 mini in the world? 13.05 1/4 mile 106mph

Mr. Prawn, the friendly Crustacean- slowly making steps towards forced induction.

Well, this is the first dealings/order I have ever made with Simon at Morspeed. And me being old school, would never part with cash until the goods were given to me, and I am satisfied that the head is what I ordered. So I can't really comment either way about the services. I have heard, which is what prompted me to use Morspeed, that the work done is to a very good standard. And yes, getting hold of anyone via the phone or replying to messages left is the biggest issue, i.e customer service.

I think 7-8 psi is what to aim for then. 265 cam should make it a tad calmer, than it could be, which is what I wanted. Any ideas guys on BHP levels out of interest with this set up. I ask as I recently approached my isurance company to ask for a quote, using what the absolute max this set up might be as an idea, but they poo-hoo'd anything above 125bhp. If they don't want to re-think that, then nuts to them, as I will just go elsewhere.

try to put the carb within a few inches of the charger rather than the 3 feet of most installs - fuel doesn't like going up hill a long way on part throttle - not to mention throttle response!!

JK

If Carling made Mini engines
it would probably be like this one!

I still recon you can get a 40mm bike carb very close to an Eaton kit.

I use on on my SC12, they are much much smaller than the SU and no more dash pot oil.

I run a supercharger and I don't care the TB is on the wrong side.
VEMS + 12 PSI + Liquid Intercooler = Small Bore FUN!

why are SU's still being used gor these setup's?

I presume as its a conversion kit most people will already have the SU.

I run a supercharger and I don't care the TB is on the wrong side.
VEMS + 12 PSI + Liquid Intercooler = Small Bore FUN!

thats true,
but there must be a better alternative

with regards to the jonspeed setup, from what ive seen that are badly made, the welded joints leak, the inlet manifolds are heat distorted and the charger tapings are weak and seem to thread before sealing.

im going by my mates setup and a car collin had to setup on the rollers.

my mate made his own carb to charger manifold, its about half the lenght and puts the dashpot out of the bonnet, it makes more power, better responce and stops carb iceing.

stromberg

Medusa + injection = too much torque for the dyno ..https://youtu.be/qg5o0_tJxYM

throttle body injection.. witha big charger mashing up the air/fuel surely the engine wont react differently to a carb on a suck through setup.

turbo 16v k-series 11.9@118.9 :)

Denis O'Brien.

Cheers for the tips guys, keep them coming. Any pictures/specifications of the bike carb set ups would be appreciated. If anyone lives near Solihull/Birmingham with a supercharger set up, would they mind me being cheeky and taking a look to get some ideas ?.

Edited by robert on 8th Jan, 2010.

Medusa + injection = too much torque for the dyno ..https://youtu.be/qg5o0_tJxYM

Thanks for the pictures, That looks very promising. I think I will move the card closer to the charger, the extra heat should help with fuel supply and anti-icing.

crap phone cam, this is when I first installed my bike carb

I run a supercharger and I don't care the TB is on the wrong side.
VEMS + 12 PSI + Liquid Intercooler = Small Bore FUN!