Menu toggle

Something i have been working on!

Hurrah! Well done Mark and I take it all back when a few weeks ago I warned you not to be upset if you come dead last, that'll teach me to stick my neck out and I shall help myself to a large portion of humble pie.

Now get typing that full report for us [8D]
 
Great results Mark! and pics Paz. Would have loved to be there bur needed brownie points.
Guessing you slept well Sunday night!
Well done
Mike
 
Well done Mark - great result

looks like the TR7 will be your biggest competitor if it is reliable...although maybe there will be more people running 944 turbos next year if you keep on like this [:D]


 
Thanks chaps,Need the car and me to lose weight i reckon!,the tyres got quite hot by the end..!There were two other turbos in the mix i think,the rest S2s and luxes.The front three cars were very quick indeed and had experienced pilots,i have a way to go yet i reckon.Snetterton is a circuit i have done a few track days on so knew it fairly well ish luckily.Car runs great new clutch needed and need some lessons in launching her from a standing start[:D]
Why the TR7 in particular?The carrera 3.2 that is in the pics went really well aswell and you could tell he was an old hand at racing,i reckon there will be a few dices with him this year..
The laptimes on Paz's link give me some hope to chase,check out fastest laptimes of the cars that finished just need some consistance,got some ideas for the car that will hopefully bear fruit.Fingers crossed.
 
The time I managed a 0-60 of 5.9 seconds (S2 on road tyres) using Trefs G-tech pro the technique was like this.
1) Slowly raise the revs
2) When it gets to 2.5K step off the clutch like you would on a normal everyday smooth and gentle gear change
3) Hold a constant throttle until the car stops dancing then full throttle.

Note when I did all those test launch runs a couple of years back if you get a touch to much wheelspin or the car doesn't dance a little (it will then bog a touch) the result is a 0-60 more like 7 to 7.5 seconds, very dependent on surface. TBH I found this amazingly frustrating as you either nail it or get a duff launch. If more grip add some revs so the 3K revs idea sounds ideal if more grip then road tyres on a grippy surface.

Once again well done Mark.
 
Well done Mark - very impressive. Don't be too quick to brush off all the glory onto other people - they helped you get there, but at the end of the day it is all for nothing unless the person in the seat on the day can bring it home well. Good to see a Porsche Turbo doing a good job too after the multitude of threads i've read about turbo's not making very good race cars despite the fact the factory raced them back in the day. So what's your plan from here? Wipe the board with everyone this year, give Ron Dennis a call and get some sponsorship, work your way up the formula's and we'll see you in F1 in about 5 years time? All in your 944 turbo of course!
 
Thanks guys[:D]
The launching off the line thing deffo needs some practice,maybe not too much as when i get my new clutch i dont want to ruin it straight away!but will have a look at the technique you describe Neil.The clutch was deffo slipping by the end of the 40 min race i could hear it as i tried to lay in the power,i was looking at the stopwatch in the car thinking" wave the fiddlesticking flag before my clutch fails!"
It lasted fine in the second race as it had time to cool right down but it was hammered when i mislaunched the first time, someone commented that there were bits of clutch particles all over the engine....
Thanks Scott,it was a dream of mine to race the turbo more than any other car it is a unique car i reckon especially in its day,there are some tracks i reckon where it could do better the esses at the end of the back straight at snett are tricky because of the gearing and keeping it on boost so a bigger track might yield some good results maybe?Plans for the rest of the season are just do as well as i can,i am quite focused on it,maybe a bit too much,there is so much to think about its pretty involving,the preparation of the car the logistics of it all hopefully will become more second nature..
One thing i have learned reversing a trailer with a car on is beyond me[:D]
 

ORIGINAL: MarkK
One thing i have learned reversing a trailer with a car on is beyond me[:D]

[:D] Funny you say that I worry more about driving with the trailer then anything else. One thing I have decided for sure is that I won't be buying a trailer this year, rent them per weekend instead.
 
Well Mark, with practice you can swap out the transaxel in about 40 mins, so you can have another gearbox with lower ratio's for those more twisty tracks - eg have a transaxel with an S2 crown wheel which lowers the overall ratio's. This can be done relatively cheaply. Also I seem to remember reading something on Rennlist a while back where Vitesse was looking at a modified stock turbo with updated internals to reduce lag and improve flow to maintain max boost higher up the rev range. All looks completely stock from the outside. Having a few secret weapons in your arsenal is all part of the game!
 
Wow! What a result. Straight into racing at the top:) What's your secret[;)]

p.s. I'm no expert but the 944 turbo is probably the hardest cars to launch I've ever driven. I tend to hold the revs quite high and let in the clutch quite quickly moving your foot to 'say' 2/3rd's throttle at the same time. If you get it just right the wheels slip slightly and are just re-gaining traction as the turbo spools. It sounds very scrabbly but feels smooth in the car and gets you 0-40 very cleanly.
 
I found the quickest way to launch the car was to modulate boost using the clutch - so i'd get some revs on, say 4krpm, and pull the clutch up more slowly because as soon as the clutch bites you get boost so you can't just dump the clutch or you'll just spin up the rear tyres. I found that if you balanced the throttle as you were slipping the clutch you could maintain revs at around 4krpm therefore stay on boost but slip the clutch to bring in the power smoothly avoid wheel spin and the thing just took off like a scalded cat. Slipping the clutch in this way sounds like it is tough on the clutch, but actually dumping the clutch is far worse for it, shocks the whole drive train and induces wheelspin.
 
Looking at clutch options at the minute,apparently there is no upgraded clutch from Porsche anymore and the standard one $$$!,Lindsey have some options that come recommended by a freind with a powerful turbo,only thing is i do need to come up with a plan as i reckon the current clutch wont stand another race and the clock is ticking...,it will do a gentle trackday but thats about it.thanks for all the suggestions i am going to have to find somewhere and practice launching the car once the new clutch goes in.Drove the car to work today its very practical aswell[:D]
 
Mark, I've had a couple of clutch plates from this company. I currently have one which is a sprung centerhub and I think matched to a KEP II pressure plate. I haven't experienced any slip as of yet. I've had 1.5bar+ through a GT3076 with this setup. I've also had a sprung 6 Puk clutchdisk before too. It was pretty horrible in traffic and reversing, but was fan-bloody-tastic on the track. It made the car feel like it had a sequential gearbox by comparison to a stock clutch setup. Just bang-bang-bang through the gears. I'm sure you would pick up quantifiable time on the track with one of these.

http://www.clutchnet.com/search.php?mode=search

I've also heard good things about another US company called Southbend clutches. http://www.southbendclutch.com/aboutus.html

I would also concur with Scott in saying that a stock 951 with an S2 crown wheel and pinion really transforms the car on road or track. I have had this for well over a year and wouldn't go back to a stock transmission ratio unless I raced on very long, fast circuits or did a lot of long distance travelling. It reduces your overall final drive ratio by approx. 15% but it truly livens up the car considerably. It just seems to place you more in the 'meat' of the engine's power spot. It can mean that you change gears more often which is not always desirable, but overall I wouldn't go back. On a large capacity 3L plus motor, then I'd say stick with the stock gearing or something else, but for a 2.5L where you are racing on rpms rather than mostly tq, then seriously consider the change...or better still, get another tranny. Excuse my ignorance, but what LSD unit do you have also?

 
Well done Mark - excellent start to your racing career!

you might find reversing with the trailer easier if you snake it a bit deliberately, curve it left and right a little as you reverse and it makes it easier to know which way to turn. Or practice by reversing boats down your nearest slipway on a sunny bank holiday ;)
 
Thanks Tony[:D] probably beginers luck..!
Thanks Patrick,will have a look,really not sure of what to do at all....[&:]The LSD is standard Turbo S,works really well though.
Did a day at Silverstone today with my dad and Brother on the National circuit,had some lessons aswell,really picked up a couple of pointers and fundamental fixes i reckon.My car needs new front discs now really badly they just about go through the calipers still,totally warped but have never faded or failed to bring the car up sharpish.Front tyres shredded too,front left tyre is comedy[:D]
 

Posts made and opinions expressed are those of the individual forum members

Use of the Forum is subject to the Terms and Conditions

Disclaimer

The opinions expressed on this site are not necessarily those of the Club, who shall have no liability in respect of them or the accuracy of the content. The Club assumes no responsibility for any effects arising from errors or omissions.

Porsche Club Great Britain gives no warranties, guarantees or assurances and makes no representations or recommendations regarding any goods or services advertised on this site. It is the responsibility of visitors to satisfy themselves that goods and/or services supplied by any advertiser are bona fide and in no instance can the Porsche Club Great Britain be held responsible.

When responding to advertisements please ensure that you satisfy yourself of any applicable call charges on numbers not prefixed by usual "landline" STD Codes. Information can be obtained from the operator or the white pages. Before giving out ANY information regarding cars, or any other items for sale, please satisfy yourself that any potential purchaser is bona fide.

Directors of the Board of Porsche Club GB, Club Office Staff, Register Secretaries and Regional Organisers are often requested by Club members to provide information on matters connected with their cars and other matters referred to in the Club Rules. Such information, advice and assistance provided by such persons is given in good faith and is based on the personal experience and knowledge of the individual concerned.

Neither Porsche Club GB, nor any of the aforementioned, shall be under any liability in respect of any such information, advice or assistance given to members. Members are advised to consult qualified specialists for information, advice and assistance on matters connected with their cars at all times.

Back
Top