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MG ZR ZS ZT Technical - supercharged ZS

Has anyone enquired as to whether its possible to get the supercharger promoted by that oz company for the ZT fitted to the KV6 in the ZS180?

ps why is the kv6 in the zs 180 psi and that in the zt 190 psi? Is it just down to breathing mods?
marc h

I believe that a UK agent has been appointed Marc although I can't recall who it is off the top of my head - perhaps someone else can recall?

The difference between the ZS180 and the ZT190 is, I am told, almost entirely down to engine mapping. Probably MGR deciding that it wasn't good for the cheaper ZS having as powerful an engine as the more expensive ZT. Personally, I don't see the two cars competing in the same market, but it did show that the ZT needed a more powerful engine (that eventually arrived as the slow-selling ZT260).
Rob Bell

Rob, as you may have guessed Im thinking of swapping cars for my various sprint championships as Im getting pretty sick of being humiliated by Civic Type Rs etc. A ZS 2.5 would put me in a tough class (with the Porkers etc!)and as such would only be worthwhile in a supercharghed ZS. Even then I suspect were only looking at 220 psi max. The alternative would be a ZR 135 but with new cams, ported head, throttle bodies and remapped to c 185psi. Given the cars weight that should make me competitive with the Civics etc. Or maybe I can find a Judd 2 litre K series - I wonder if the administrators of SnR have any to auction?
marc h

Or maybe I can find a Judd 2 litre K series - I wonder if the administrators of SnR have any to auction?

Was thinking the very same thing.
also I wonder if they have any ZT 260 Mustang engines going begging!
Neil

That would be the Sprintex supercharger. I believe that someone has enquired about a fitment for the ZS.

The figure banded about for the kit was around £3000, with an expected increase in power of around 40bhp. The VIS system is replaced with a different induction system with an additional fuel injector. The supercharger itself sits at the back of the engine and is run off the serpentine belt

Ralph
Ralph

From reading the Caterham and Elise forums, it appears that a 1.9 litre K-series will give practically the same power and torque as a 2.0 litre (not the Judd engine!)

Have a chat to Scholar Engines (www.scholar-engines.co.uk/) - they'll sell you an EVO2 block that is bored to 1.9 litres and completely built up.

On throttle bodies and suitable manifolding/ exhaust systems, they're good for a reliable 220-230bhp.

Would be good for any of the MG range, from ZR, through ZS to MGF.

You could even fit it to a K-series Metro, if you were truely insane... traction might be an issue though!

Minister and QED have been working on the KV6. Much of the effort has concentrated on the 2.0litre (thanks to those class rules on capacity). But DVA can port the head, and Powerspeed can make you an affordable exhaust manifold that should see you making in excess of 220bhp. If you then supercharged the engine, expect considerably more power and torque... it all boils down to what you can afford, and what you can get away with according to class structures.
Rob Bell

yes, heard about the 1.9l k series. I'll look into it. I suppose it will depend on price. 220 - 230 bhp would be fun! Even if you supercharged the KV6 looks like youd only end up with 250bhp and a very heavy engine. Too heavy for an F i think. Also, I suspect too heavy for a ZR or ZS - handling would not be great.
marc h

Weight of the K16 VVC is 110kg. The weight of the 2.5 litre KV6 is 150kg. 40kg difference is not so massive, but it has a higher centre of gravity - and that is bad. Plus the engine is over the rear wheels, so that's 40 extra kilos in the wrong place! D'oh!

A well-tuned 1.9 K-series would probably be the best bet - but it won't work out cheap once you've bought every thing needed to make it perform at this level. For example, if you go for a balanced, heavy-metal inserted crankshaft, it'll set you back a grand!!!

I've decided to supercharge mine - and that ain't going to be cheap either! :o/

Not sure how I could compete in the MGCC SC unless I plea for a regulations alteration?
Rob Bell

Which leads you back to the best car for supercharging being the ZT. Taking the KV6 160/190 to 230 and the ford V8 260 to 390ish.
Tim Hayton

rob, is that with the mini cooper supercharger? heard it might fit. or the old turbotechnics kit? whats the cost? dont think it would be much good for me as it would put me up against porkers and tvrs in the acsmc championship and as you say it would make us ineligble for the mgccsc. as to the latter point, seems a bit odd that you cant even run in the specials class? what do the do about the old pre war mg k magnas etc that were supercharged?

like the idea about supercharging the v8 - needs it, vast engine, heavy car and low bhp per ton figure.
marc h

I managed to buy a complete TT SC kit from a chap selling his MGF on as 'standard' :o) The plan is to build an engine for it - a ported VVC head, balanced bottom end with Arrow rods and suitable pistons. With slightly saucy cams, I hope to see about 230bhp and 200 lb.ft :o) Should be adequate for a bit of fun :o)

The MGCCSC regs are inflexible as they stand. SC and TCs are fine if the car was originally available for them. For us, it is a shame that BMW never commissioned the MGF Supersports with its Janspeed SC engine! Perhaps we could petition for aftermarket SC cars to be included in the specials class?

The SC Dreadnaught ZT V8 would be quite a beastie. Wouldn't recommend it for competition unless you have deep pockets. If you think that MGFs have a hunger for tyres, a SC V8 ZT will consume them as though they're going out of fashion!!! =:-O
Rob Bell

Rob!

230bhp in your old F?

Blimey
that will go!

remeber about cooling it all though!
suggest fitting a couple of small but proper (not computer ) fans in the boot lid to help the airflow out.

I remeber when I wrote an article on the Superchsrged F that was created some years ago, it all looked very inflammable to me, and preferably used in the depth of a swedish winter!
Neil

That's the plan Neil :o)

Engine bay temperatures likely to be the least of my worries - the plan to cool the oil using a water/oil heat exchanger is likely to challenge the front mounted water radiator to the maximum - might be a case of buying a larger one - or even ducting it out through the bonnet, a la Lotus Elise. But I am a little worried that that will look a little "MAXXED" :o(
Rob Bell

Just before MGR went belly up i seem to remember that X power was about to do a re-map to 205 bhp?.......as used in the LWB 75 Limo.

Mega
M EGA

you can see the sprintex blown ZT on www.sprintex.com.au
Steve Foldhazy

This thread was discussed between 20/06/2005 and 19/07/2005

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