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Horizontal fan on a 911? LOLA PORSCHE

Good luck Graham! Sorry I can't be there for the debut.[&:] See you next month at Loton if not before[8D] Cheers! JW
 
Yes... Survived the private test day today and the first time I have driven this car.... Just 2 issues: 1 Intense crankcase pressure with oil everywhere outside the engine, but this was fixed track-side and seems ok now. 2 Could not get any more than 1 or 2 or 3 or 1 gears on the move. The lever throw is about 95% of that required to shift the 915 reliably. I think i've shifted it to 110% of the gearbox shift tonight. I will see how it goes over the weekend! It drived just great, arrow straight, neutral to a point, and when it lets the rear goe it is instinctive to catch. When you find third.....oh lordy.
 
It works! On it's debut at Loton:
3710211220_4ab12c85cf_b.jpg
 
Hope it goes well this weekend Graham, and nice to see pictures of it being used in anger already from Gary. With luck (unless you're camping! the weather should blow over tonight and be a bit better tomorrow again. Look forwards to reading the write up :)
 
Quite a day (sat). Hope for more Sunday esp if the weather better! A lot to say, and a lot achieved todat. Time dropped from a stunningly poor 84 secs to 66! Full report sunday evening unless I'm done for, and John's pics are available. Nice to meet you again Gary. The rain got worse. An amazing first experience and a class win (hollow victory I assure you)... Graham.
 
Congratulations Graham, and great to at last see a picture of it blaasting up the hill. Thought of this thread and all your hard work when I saw the 917's down at Goodwood :) Ian
 
There are several issues to the weekend gone that need fixing for the next race in 3 weeks time. 1 Gearchange Just cannot yet select 3rd reliably. This slows the car down considerably despite evil fast acelleration in second (1st almost redundant). If I can get 3rd straigh from 2nd, the times will fall fast. 2 Rear crossmember flex. The front (911) engine mount is too flexable, but easy to stiffen. This will share the engine movement loads under hard accelleration. 3 Clutch stroke. I can only just get the clutch to clear as i cant extend my leg/ankle enough as it is soo awkward and heavy. Trying to ease the pedal load and so allow the leg to push further. 4 Front nearside tyre rubbing on body. Found that the body is not the same wheel arch opening on both sides..... Can't fix that in time unless I use a big jigsaw. 5 Carbs Need to be sorted on rolling road. One chamber is flooding too. Begining to remember why I didn't like webers now!
 
Yes, I thought I had tied it down enough when I moved the engine back to straighten the drive shafts, but plan to stiffen the front mount as well this week while I have the time. Some short videos from Loton : [link=http://www.youtube.com/user/piscisvisio]http://www.youtube.com/user/piscisvisio[/link]
1DA18C898071465C8BF4EE805E8AB550.jpg
 
As an exercise in endurance and dogged tenacity, this saga has to be hard to beat. Makes those EVO boys and their minor trials with the Lotus 23 look like wusses. Just following the thread was wearing. Huge congratulations, dear sir! JohnC 993turbo
 
Thats the point. Its a Lola with a horizontal fan. It will cause quite a stir in many a paddock. I bet someone will think the fan is to do with roadholding (the Jim Hall fix) JohnV 993turbo
 
Yes...far more than one over last weekend! My 'mates' have christened it the 'Po-Lo' (Porsche-Lola), so over the commentry: Here comes Graham in his new 'Polo'..... [:mad:] [:D]
 
Sounds great [8D] Stiffening the mounts may help with you gear selections if you can select them while you are stationary? I can feel mine change when the car is hot, more flex.
 
Thanks for the tip. I took the opportunity to stiffen the engine/box mounts when i moved the lot back 40mm to straighten the drive shaft paths out. It all sits in polybushes and is very hard to move by hand. The mod now is to discard the shifter mechanism that came with the box and simplify the lot straightening-out the shift rods as much as I can. I am shamelessly stealing the system used on the Ultima cars... I went to Silverstone yesterday and with permission played with a few gear knobs...sad, but true. Most of them are VERY slack and mine feels as tight as a good rack and pinion by comparison. If this doesn't work then it must be the box, so will get it down to Bob Watson later. The quality of presparation at Silverstone in the cars makes my first effort look cr@ppy, but maybe I've improve things over the winter.
 
Time to start thinking towards the next mods. The 3.2 as it is just makes 200 bhp/lbft which is very weak for a 3.2 on webers. A target must be 240/250? It is thought the issue is in the home made butchered headers and the fanct silencers. Plan is to put the car on some rollers and power run with and without silencers and see if something positive happens. That will give a clear path. However, i feel the headers are not good. They are 2.4 'SSI' type cut to fit so loosing the equal length primary pipes. Further, the pipe diameters are small and the 3.2's ports are huge by comparison. Somewhere (unless I've drenmt it) there is a formula for calc the primary pipe length for a 6 pot engine, but as a flat 6 is it valid? Anyone here have this formula as I can't find it! There is very little space under the engine-to-chassis rails so I may not reach the ideal, but it must be better than the current pipes. Any info will be useful. The SSI style headers have extended pipes to achieve equal length, so i presume the length is correct for the engine. Did Porsche bother that much way back then?? Graham.
 
Any good? :- [link=http://www.bgideas.demon.co.uk/tmanual/Tm_Ch4.pdf]http://www.bgideas.demon.co.uk/tmanual/Tm_Ch4.pdf[/link]
 
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