S2 TT Supercharger alternatives?

[n209385]

Anyone got any experience of the Turbo Technics supercharger conversion?

I'm after a conversion mainly for road use but also the odd spin on the track - I'm therefore after a decent amount of torque as opposed to stacks of power higher up the rev range at the cost of low down pulling power - are there any alternatives? Will Lotus Sport be able to sort something perhaps. Have looked at the PTP High Torque conversion but would like to go a little further.

cheers

n209385

[n209385]

I saw that review too - I plan to drive a demo car from both TT and PTP.

I was a little concerned about the Top Gear review however.

n209385

[n209385]

Thanks fot that - I am very tempted to go for the TT conversion, but still have the nagging doubt that the elise isn't really surposed to be a 100mph+ motorway machine.

It is interesting what you say about the acceleration at lower speeds - ie up to 60mph - I havn't really felt the need for improvements in this range yet. It feels bloody quick to me already so may kill myself if the car is made even faster!

How about the 135 conversion then - anyone with experience with this?

Cheers

Julian

[n209385]

160 bhp would be good if possible, but from what I have seen the S2 cannot be develped in the same way as the S1 - is this just a matter of time or to do with the Lotus ECU/emmissions regulations.

That said B&C state that their super 160 conversion is available for the S2. This would be the Minster conversion. Are dyno figures available - any are their any super 160 owners out there who can comment of the characteristics?

I guess I need to get off my arse and drive these cars.

Julian

[n209385]

Thanks all - am driving the S2 TT190 demonstrator today - so shall let you know how I get on.

Cheers

Julian

[n209385]

Big grins all round then. Drove the TT190 demonstrator in Northampton today. The main impression I got was of increased speed with little effort. I drove my standard S2 there to ensure I got a good comparison. And driving the demo car I wasn't too sure there was much difference until I looked at the speedo. In the TT car you are doing 100mph along a single caridgeway A road without really noticing it where before above 80 you would pehaps be in 4th and flat out to gain speed. A couple of times I tried to change up but then realised I was already in the higher gear. Instead of thrashing the car in 3rd and 4th the effect is that you can use 4th more often and rely on the torque to give you the acceleration you need. Changing down to 3rd gave real acceleration. The car was obviously faster but with very linear power delivery. Even so I felt a marked improvement with myself and Rob from TT in the car with a full tank of fuel.

Problems - the idle is still a bit lumpy. My car sits at 950 revs happily on tick over. This car was 'hunting' (is that the right term) with revs between 1100 and 1400, and as has been said above below about 3000 revs there is not the immediate power delivery of the standard S2. Also on overrun when the car drops to 2500 revs it begins to judder a bit. This apparently can be solved - something to do with exhaust gasses - but it is a pitty as my car with the sports exhaust does make a nice satisfying popping noise on overrun at these revs - which may be prevented if this trait continues and I do the conversion. Have others experienced a similar problem?

All in all I think I shall go for it.

Cheers

Julian


>> Edited by n209385 on Friday 28th June 15:53

[n209385]

I did read it all Guy – thanks very much and I tend to agree. Getting back to the original topic If I may, It's just over a week since I test drove the TT190 S2 Demonstrator and I'm beginning to have a few doubts. The main nagging doubt is the way the car behaved on over-run - that odd chugging on a closed throttle when decelerating.

Again, any S2 TT190 owners out there care to comment on this characteristic? Do your cars behave in the same manner. The other thing is that after my first track day at Hethel I came away with such a big grin that I doubt would have been any better if I had been in the 355 this Italian Chap who was visiting the factory brought along for a spin.

One thing I am convinced of is that the TT190 does transform the car – to a faster and also more relaxing drive. I also tend to think that a normally aspirated conversion with extra power at the expense of torque will (1) increase the risk of failure and (2) will not really give any benefit except on the track. And It’s not as if I do track days every weekend – I only plan two or three a year.

No real conclusions – but I guess if I wanted a Boxster I should have bought one.

Cheers

Julian

[n209385]

quote:
PeeJay, let me know how you get on, I'm thinking the same thing, although the rover has a nice constant power delivery, you can't beat more HP's.

Not sure on this - still coming to terms with the implications of power v's torque - and the stuff on elises.co.uk goes some way to explaining this but from what I understand it's torque we are after for road driving - hence the desire for V6s/8s and superchargers.

Julian

[n209385]

Another reason to visit BBS is that there is currently a discussion of the new lotus retro fit 190bhp upgrade for S2s - but not the sport 190, it's a new one apparently. Cost is tbc, wild speculation ranges from 3K to a more realistic 7K.

Cheers

Julian

>> Edited by n209385 on Friday 12th July 12:39

[n209385]

Well after all that, I just got off the phone from Rob at TT and the S2 is booked in on the 2nd of September - with cat bypass, sports exhaust and 4:1 exige style manifold. The ECU shall be altered to prevent the fuel cut-off on overrun.

Shall let you know how things go if I don't kill myself first.

Cheers

Julian