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Back from Promax

DavidL

Active member
Well after waiting a few weeks I collected my newly Promaxed car from Andy and Roger on Tuesday.
It's had quite a lot done but first impressions are excellent.

I started from a stock 944 turbo SE "" boost enhancer and Bailey DV excepted. This drove and went well enough but I felt, as others had said before me, that a few mods would bring out the best. Now as some of you may know my car has been to the moon and back (238K) and this was itself a cause for concern but it has a fantastic service history, a new CHG and top end rebuild and used very little oil.

I had tried to sell the car at the end of last year but frankly the mileage put everyone off it seems. I wanted (and probably still do) a 996T and had a generous offer to aid selling mine but it still left the possibility that I'd end up with both cars which whilst nice, I can't drive two and I don't have covered storage for them both. Nor do I want two lots of running costs. So as an outright sale wasn't happening I decided to keep mine.

A leakdown and compression test in the summer was encouraging but the first thing was to do it again. Fortunately the results were a better still and it was deemed ok to move forward.
So what to do?

Well I had collected a box of goodies from various sources over the last year or so and I presented Andy with a Lindsey DPW, a set of JM chips, a set of 55lb injectors, a 3 bar FR and a Lindsey Quad M MAF kit. The latter we decided not to use for now as it would require more setting up than either Promax have the kit for or than was necessary at this stage.
In addition Andy had one Wortec exhaust left and after not much decision time a set of KW3s were ordered too. Add a set of 968 castor mounts, new engine mounts and couple of other bits and that's all!

So forward wind these few weeks and look forward to the trip home.

Exhaust "" set to quiet but still makes a nice noise on the throttle yet you can't hear it on the move. Yes the electronic switch mechanism would have been nice but a little unnecessary for the money.

Suspension "" I had been running a stock set of SE shocks which I thought were ok but the difference is immense. I wanted a modern car ride and that's what I have "" I used our Impreza as a benchmark and having driven them both now they are very similar. B road bumps don't phase it and the ride on smooth surfaces is very poised. Best bit is the turn in "" very positive and direct, more akin to my Caterham than its old self.

For those interested the rear heights are kept at the limit of the adjustment (I didn't want it slammed) and the front adjusted to give a 5 degree nose down stance. It looks flat without the driver. Low but not speed bump rippingly so. No reindexing - I had no interest in this. It won't see a track and I didn't want or need any more drop available.

So does it go "" hell yes. It gains speed at a phenomenal rate and is now noticeably quicker than the Impreza whereas it wasn't before. I shall have to be careful as you reach 3 figures (allegedly!) very very easily. At this stage (and I know I'll get used to it) I can't see how you could use more speed without decimating the speed limit by some margin everytime you drive. There may be an element of rose tinted spectacles but having driven a couple of 996T I can't see it would be very far behind in a straight line and in the real world the difference at anything other than silly speeds can't be much.
I didn't dyno before and after but I'd hope for 300+ by now.

Costs "" well not cheap but in comparison with what? I saved a fair bit by collecting the parts not buying new but the exhaust and KWs aren't pennies but to get this sort of ride and performance another way would have to cost more. I could have done some myself but I don't have the time and there is a lot to be said for having it done properly and getting back the finished article not a work in progress.

So I can heartily recommend these sorts of changes if you have this type of car and would have to recommend Promax for a cracking job "" I genuinely believe that they made sure the car did what it is supposed to do before I got the call to fetch it. I haven't had the bill but I'd reckon on a good few hours fettling that don't make the bill.

I'll try and sort some pics for the weekend.

 
"Health to Wear David" as they say around here

Sounds like a nice package you have there, very interesting, especially KW's. I have never heard a bad word about them. Promax seem to be up to their usual standard, - have always been the same in my experience.

It will now go to the Moon and back again.

I understand the TT itch, but in reality, for knocking about as a daily driver the 951 is perhaps the better car.

George
944t
 
Great write up of what I am sure will be excellent enhancements to your car - all the observations certainly match my own experiences with a not unsimilar set of mods. Enjoy !
 
And here's me thinking that mine is too high a mileage to do any more tweaks!
Mine is a mere whippersnapper at 228,000!
 
Actually EDH, you make a good point, as these cars are still viable everyday/only cars they will be fairly unusual in the Classic car world in that they will continue to rack up the big miles, I bet in a few year's time there will be many 250k+ milers in the classifieds

Just realised that I have done over 5,000 miles so far this year!!
 
My Ex turbo race car did a whole season in 2010,with a re-ring and head refresh at 180k miles,no probs,i know it has been rebuilt since but its amazing how tough these engines are.
 

ORIGINAL: DavidL

I wanted a modern car ride and that's what I have

That's just what I think - it makes the whole car feel (even) more solid, and more pleasant to drive. I'm really looking forward to trying out KW's on the track
 
Ed,
Having driven it a bit more that really is the difference. Now Gaz may give you the same ride for less but I didn't know so in for a penny and all that.
I tend to drive quite rural bumpy roads and a couple of spots that really had the car bucking before now just don't upset it at all.

Fatty,
I think you'll overtake me soon enough as you seem to put more miles on than me but your oil consumption might be of some concern if you wind it up [;)]
 
Congratulations David, it sounds like your car is even more sorted than before and I'm really jealous you have the KW shocks [8D]. I saw it at Promax on Monday when I dropped mine off but didn't realise at the time it was yours. It is good to hear your compression and leakdown figures were better than originally thought

Just picked mine up today and had a fantastic drive home with refurbed brake callipers, a fresh service and new camchain and slipper (3rd time I've replaced that in my ownership) but she's a mere spring chicken at only 205,000 miles compared to yours. Andy called me with an update every single day he had the car and the bill was so reasonable I had to treat her to one of their remapped chips [:)]. Early impressions are good, I can see why everyone talks about improved smoothness and driveability
 
Paul,
On reflection I did see a black G plate on the lift. Shame we didn't go the same day.
Still thoroughly enjoying it.
Any idea whose the white turbo cab is? Lots of wiring issues by the looks of things.
 
David

I think you owe your car a little run out on a Silverstone evening this summer [;)]

These sort of mods - chips, DPW, MBC (or EBC) etc.. make a big difference to the car at relatively low cost. It really represents the "sweet spot" of 944 tuning IMO (specially when coupled with the KW's..) Upping the power from here really does start to cost ££'s and you start to wonder why..

(mind you, I'd love a go in Mark's red one [:D][:D])
 
It can only be a matter of time before mine gets the KW treatment also. But in the meantime David, how about a "power-off"? Your car has the same mods as mine, so if we go to the rolling road at Veysport next time you're in Dorset we can see whether Promax matches/beats JMG? Maybe Andy can put a tenner on your car, and Jon a tenner on mine, and we can put their (and our) money on the line!
 
If I were to do anything else then it would be a new bb turbo and a maf, maybe the one I have or maybe rogue or vitesse. It won't be anytime soon as I doubt the engine would take it without work.
 
David,
I have a SPS BBT and its a good device.

I think you have two options if you go that way. One is per my car which is modest performance with minimum lag, the other is big performance with some lag from the larger unit. Probably 340bhp and 400 bhp respectively with 1.2bar and 2.5L.

These engines are very strong as you know, and I would say a well maintained one with 250k miles could be upgraded in a modest fashion to 340bhp with just new bearings. If you catch while-you-are-in-thereitis on a project like that, it may change from a £3k project requiring 3 days work to fit rings, bearings, 3" exhaust and a turbo, to a £NHS budget, super complex, closed deck, lined block, new rods, new pistons, and taking 6 months.

I would predict your oil consumption would reduce by 80% with a BBT and a further 20% with rings. The KKK is a crude device as standard. (but reliable)

Depends if you plan to do the 24Hr Le Mans or just have a quick road car.

Enjoy yours - I can relate to the bumpy rural roads bit here in Ireland.

George
944t





 
David,

I dropped mine off at Promax this morning for its annual service and mentioned to Andy that you seemed well chuffed. That in turn made him happy.
 

ORIGINAL: George Elliott
I have a SPS BBT and its a good device.

George (and apols to David for thread hi-jack)

I know little of these SPS ballraced turbos except that (as Iunderstand it) being ballraced, they have much lower internal friction so spool up more easily, meaning you can have a friskier bottom end as well as more top-end go. Longer term I might be interested in going down this route, very much the way you have, emphasising road drivability, and being more concerned with minimising lag rather than squeezing every top-end BHP out of the beast.

Two questions:
1. Where can I find out more? And roughly what do they cost? I've tried googling them and don;t seem to be able to find a manufacturer's website
2. Are they straight plug in replacements (in terms of physical plumbing only: I am assuming a custom remap will be necessary) or do you have to start crafting manifolds and custom exhaust pipery?
 
I really love all this tuning talk[:)]
just wanted to say..
400 bhp from a 2.5 is not just turbo size,there is so much more that needs to be done for the extra horses,350 is almost easy,to get to 400 there are all sorts of things that need to be done.. The extra power is harder to get and insure.. that I am sure Andy would explain if anyone is up for it,55lb injectors not big enough, Big intercooler,restrictions need to be freed,extra big fuel pumps,oil cooler..
I read an article on the original RUF yellow bird in an American magazine a few years ago after I had the red car done by the chaps at Promax,I think it was 2006?And it mentioned slightly hunty idle,puff of black smoke from exhaust on first gunning of throttle and the likes.. Plus a bit of Lag and I really reckon that my car is the 944 turbo equivalent almost,
I wonder if they could improve on it in 2012 with latest tech?Anyone game ?
I don't agree that a non Porsche(American) block is the way to go just for the record..Cheating and it's not a Porsche!
Really enjoyed reading about this latest car to get Promax treatment,Mr Smith sounds happy aswell.If anyone else does have there car tweaked it would be great to hear about initial impressions and then what they think after they have got used to it..?There used to be loads of tuning and power talk and it all died off a bit good to see it's back.
Good stuff chaps.[:D]
 
Simon,
I acquired the unit in the car, so cannot help you with a specific cost.

I enquired with Simon Peckham on the forum here ref the BBT, and this led on to me testing one in a car, and then to owning the car.....so be careful.

I'd point you to Jon Mitchell Garage JMG to contact Simon, or pm me and I can put you in touch.

Its a Morgan as opposed to Toyota set-up, Simon is particular about this turbine stuff, a good small scale English engineering concern. (Would remind you why the 918 Porsche is made by you lot over there[:D])

It is almost 100% OE compatible (uses the K26 hot side to achieve this), but my knowledge is too limited to do it justice. It will reduce your oil consumption significantly - a 951 that does not use oil...[:)]

It has been very reliable for me, - 15000 miles use now. I imagine it would not be a cheap upgrade, but it can't be telephone numbers either.

Now, back to the Promax thread.....its got me thinking suspension / Irish roads....[8|]

George
944t
 

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