Porsche Enthusiasts Club Forum

Ok guys I want some input please, the 944 s2 is a 3litre so should be good for at least 85bhp per litre as a 16v, so thoughts on what you have done or would do to get to the 250/260bhp mark.

thanks in advance.

Fife

Supercharge it!!

Fife,
The NA cars are hard to get much more ummph out of at least not economically.
You can chip them but that won't raise the bhp much but it should make it nicer to drive, sort of a good exhaust, make sure its breathing as well as it can and I think that's about it.

Of course there are 968 turbos so you could turbocharge it or as RS says supercharge it. Ninemeister are the ones to speak to it seems.
But cheap it won't be.
Best option when you start to think this way is to buy a turbo. Its the most economical thing to do.

Add Nitrous. Everything else will cost silly money with only modest gains as by the the time Porsche got to the S2 they'd pretty much sorted it. Even the 968 with variable cam timing hardly makes any more power.
Before you start get it on the dyno & see how much as been lost over the years. Then work on getting the power back to where it should be.

Supercharging is probably the most reliable option, and there are quite a few supercharged 968s around like this one http://www.specialistcarsltd.co.uk/item/502/catid/9 which featured in a few mags a couple of years ago

Hi

Another vote for Nitrous, 150 hp extra for less than £1000....

No way you can get that with a Supercharger or Turbo...

All the best Brett

Thanks, guys,

car is very good at the moment, pulls well, has new injectors and recent work in the engine bay that does make it feel like a 200+bhp car, thus I want to see what it is like on a dyno sooner rather than later to get a baseline.

only urgent issues is the split nearside inner driveshaft boot.

Question are these the same as for a Polo?

On tuning chipping yes, and airflow yes, I will then seriously look at Nitrous, a +75bhp in 3rd, +100bhp in 4th and +125bhp in 5th would be very interesting. Always wanted to try nitrous and yes a lot cheaper. Lets face it for the £15k you would sepend on a blower etc you may as well go buy a 911.

The only other thought has been turbocharging. I am used to turbo cars and have a few kicking around, if the headers for a 944 turbo fit the same 3.0 block of the s2 then maybe a good way of starting, but with more cubic inch to start. I have dicussed this already with the local garage.

keep the thoughts coming.

Many thanks.

If all you are looking for is up to about 320 bhp, turbocharging an S2 or 968 is not a cheap option: it is far, far cheaper to buy a 944 Turbo in the first place and get that tweaked that up.

If you must have a successful 3.0 Turbo at the lowest reasonable cost, sourcing as much as you can off the shelf from donor vehicles, chapter and verse on the various mix and match options, together with the substantial engineering input that comes from his in-depth knowledge of the cars, is availabe here on Barry Hart's Pistonheads thread.

http://www.pistonheads.co.uk/gassing/to ... nmt=300bhp

Even a 50/100 horse Nitrous kit will feel like a lot more as with nitrous you it's not peak power. Insurance is the only problem. When my new clutch & gearbox is in it's on the cards for mine. Just to have a lux thats a turbo killer!

well let me know how you get on with the clutch as I am not sure how old or how good the one I have is, and from experience stock clutches do not go very far if more torque is applied.

so once you clutch is in please liaise re Nitrous, I think with a well fettled car this might be just the ticket, 95% std, but occasionally you want that much more. I will admit I was just not sure how it would tie in with the older DME control from the Jetronic system. Or will you get a completely new ecu to control the car?

I shall keep looking around for bits but once a few little niggles are sorted a check on the rollers and tune back to std will be in order before we add the exhaust and chip. Tempted to head to Halifax from what some have said re 944 rolling road tuners.

Fife

Hi Fife

If you use a Wizards of Nos system for Nitrous like I do, you can have a totally independent controller like this >>> http://www.noswizard.com/product_desc.php?id=115

So you do not need to alter anything on the engine to use Nitrous... you just have the extra power on a switch...flick the switch and have 100 or 150 hp extra...

All the best Brett

interesting and yes quite frightening, buying turbo car and tweaking will bring 300bhp yes, but the thing i do not like is being used to a 4th gen turbo in the late 9000 aero i have, it is soooo progressive and fast to spool up, there is almost no lag.

the one 944 turbo i drove many years ago reminded me of the 1st gen 99 turbo, lag what lag, then you snap your neck, spin your wheels and fly off the road or up it. Not good.

so totally different tubo system, but its down to what the engine will take etc before pistons fail etc. saab b234r approx 400bhp as it rolled off a production line, what will a 944s2 bottom end do?

Ok so how progressive is progressive, and can I alter the amount gear by gear? looks much better than when I last looked 15yrs ago. switches needed on linkage then, and full boost only. etc with throttle switch, is it the same in yours?

Hi

Its totally progressive (smooth)

It has 5 settings in each gear plus a "window switch"..thats a rev limit setting for the nitrous....so as an example you can set the nitrous to not activate until say 3500 revs and the top window switch is also settable so you could cut the nitrous electronically at say....6000 etc...

Nitrous these days is so smooth when it comes in with a controller that you hardly know its there...apart from the fact you are rather rapidly doing huge speeds....

All the best Brett

OK so I could set none in first, 50bhp in 2nd more say +75bhp in 3rd, +100bhp in 4th and then maxing at +125bhp in 5th, progressively feeding in as you say from 3000rpm maxing at say 5000 - 6300rpm.

I am already saving my pennies. thoughts on clutch needed? are the pistons/liners upto the job on a 944 s2????

I guess we will find out?

total cost around £1300 inc them installing? and the programmer you mentioned? or is that a little light.

last question how long does an 11lb bottle of nitrous last you?