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Infidel
 
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Join Date: May 2006
Location: UK
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There were too many police around for any silliness on the way there or the way back It's getting very tame down at Le Mans now, mad Friday isn't mad anymore either. Still an awesome weekend, but i'll more than likely do the classic next year.
Will have to wait to get some high speed video until i'm next at Bruntingthorpe, or get over to the German Autobahns.....

James, i wanted to stick with the Motronic programming because the car will run better on the road, to get an 'aftermarket' ECU to run the same would take a LOT of engine dyno time, and then endless fine tuning on the road. For a track car it would be Motec all the way as it is much simpler and you only really need to map for WOT. I also wanted to stick with a MAF set up that deals with all the compensation needed for ambient changes, and keep knock control..... For a road car it just makes sense.
You also have to remember that RS Tuning are the most successful Porsche turbo race engine builders in the world, so they know their onions, and for their road cars they stick with Motronic, so that's the way i wanted to go.
I haven't done any 0-60 runs on the data logger, the times would be inconsistent as traction is a problem. Next time i'm at the airfield i will do a few 0-300kph runs.

Do you have a thread running on your car? Would be interested to have a look

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Jonathan.
87 930, 993 turbo engine, RS Tuning 520PS/515lbf-ft, Arrow Rods, ARP hardware, Solid lifters, G50-50, RS Flywheel, 890nm Sachs clutch, RSR coil overs all round, 993 C4 calipers front, 930 fronts on the rear, Ruf Speedlines.....
Old 540 BMW, XB12S Modified, for being a total hooligan
Old 06-13-2011, 05:07 PM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #141 (permalink)
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Thinking about this water/methanol injection stuff to keep my intake temps in check..... Can someone educate me, links to products etc, how to install it. Cheers for any help
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Jonathan.
87 930, 993 turbo engine, RS Tuning 520PS/515lbf-ft, Arrow Rods, ARP hardware, Solid lifters, G50-50, RS Flywheel, 890nm Sachs clutch, RSR coil overs all round, 993 C4 calipers front, 930 fronts on the rear, Ruf Speedlines.....
Old 540 BMW, XB12S Modified, for being a total hooligan
Old 07-29-2011, 08:22 AM
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Max Sluiter
 
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930 Water/ Methanol Injection
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911S
1971 chassis, 2.7RS spec MFI engine, suspension mods, lightened

Suspension by Rebel Racing, Serviced by TLG Auto, Brakes by PMB Performance
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Old 07-29-2011, 09:59 AM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #143 (permalink)
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you'll never look back
Old 07-29-2011, 11:03 AM
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Cheers for the link, good read. It seams most of the set ups are triggered by boost level. I would prefer mine to be triggered by intake temps. When i hit 37.5 degC i loose 1.5 degrees of timing, by 43.5 degC i loose 2.25 degrees and so on...... Could it be set up for something like this? A small amount of spray at the lower temps, rising up to keep the temps below 40-degC?

On my last trip to the track, on a high speed run, i saw temps go up to 57-degC and then i started to see boost being pulled (also by that point i'd lost 4.5 degrees of timing), and then the intake temps went down to around 40, then i started to see boost go back up, but by that point i'd ran out of runway....
If this set up would keep my temps down to the high 30's on a 20 degC day, i would be a very happy chap. That's basically what the Secan intercooler can do, keep temps within 20 degC of ambient
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Jonathan.
87 930, 993 turbo engine, RS Tuning 520PS/515lbf-ft, Arrow Rods, ARP hardware, Solid lifters, G50-50, RS Flywheel, 890nm Sachs clutch, RSR coil overs all round, 993 C4 calipers front, 930 fronts on the rear, Ruf Speedlines.....
Old 540 BMW, XB12S Modified, for being a total hooligan
Old 07-31-2011, 04:52 AM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #145 (permalink)
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I have this in my parts bin, would it be of any use?


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Jonathan.
87 930, 993 turbo engine, RS Tuning 520PS/515lbf-ft, Arrow Rods, ARP hardware, Solid lifters, G50-50, RS Flywheel, 890nm Sachs clutch, RSR coil overs all round, 993 C4 calipers front, 930 fronts on the rear, Ruf Speedlines.....
Old 540 BMW, XB12S Modified, for being a total hooligan
Old 07-31-2011, 05:02 AM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #146 (permalink)
 
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Well life is a *****, for all the safety the Motronic system gives, it couldn't prevent a valve letting go...........







Managed to source a couple of cylinder heads and replacement pistons and cylinders, will be replacing all the valves and springs too.... Broke the end casing on the oil pump, don't suppose anyone has a spare lying around?
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Jonathan.
87 930, 993 turbo engine, RS Tuning 520PS/515lbf-ft, Arrow Rods, ARP hardware, Solid lifters, G50-50, RS Flywheel, 890nm Sachs clutch, RSR coil overs all round, 993 C4 calipers front, 930 fronts on the rear, Ruf Speedlines.....
Old 540 BMW, XB12S Modified, for being a total hooligan
Old 10-19-2011, 06:51 AM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #147 (permalink)
7.0:1 > 11.3:1
 
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Sheesh! That picture needs a warning!

Sorry to see.
Old 10-19-2011, 08:01 AM
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Yikes! Extreme bummer.
Old 10-19-2011, 08:33 AM
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Dayum!

That's just sickening to look at!
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1986 911 Turbo
3.3L, K27HFS, Tial 46mm, TurboKraft Intercooler, 964 Cams, Monty Muffler, MS3Pro Evo, M&W Ignition, Zietronix WBO2 Data Logger, Wevo shifter, coupler and motor mounts.
Old 10-19-2011, 09:02 AM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #150 (permalink)
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Ugly isn't it!!! I have shocking luck...... Moral of the story here, never reuse valves that have been in worn guides. The guide is there to transfer the heat out of the valve, and in a loose guide this doesn't happen, use the engine hard with compromised valves and this happens Heads were rebuilt less than 3k miles ago too...... Gutted if i'm honest

If anyone can help with the oil pump casing for a 993, i think the pump is the same as the 964 too..... It's the pressure pump housing end, and my pump has a magnesium casing, so it's different to the 930 one. Thought maybe someone may have a broken pump on the shelf with an 'good' casing maybe? Worth asking right!
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Jonathan.
87 930, 993 turbo engine, RS Tuning 520PS/515lbf-ft, Arrow Rods, ARP hardware, Solid lifters, G50-50, RS Flywheel, 890nm Sachs clutch, RSR coil overs all round, 993 C4 calipers front, 930 fronts on the rear, Ruf Speedlines.....
Old 540 BMW, XB12S Modified, for being a total hooligan
Old 10-19-2011, 11:42 AM
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Me thinks there is more to this story, such as high RPM, loss of oil pressure, or valve not adjusted properly. Valves are very hard and usually do not wear much when properly lubricated in a bronze guide. Sure the guide wears, it is supposed to and they are cheap compared to valves and the associated seating and sealing.
I have, and I think most people have, reused their valves when the heads are rebuilt. So what is the rest of the story JBL?

Mark
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Old 10-19-2011, 12:18 PM
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No over rev, i was in 5th gear doing nearly 190mph at the time, so to be over revving i would have been doing over 210mph. Oil pressure was spot on, intake temps and head temps must all have been in spec as it was boosting correctly, otherwise the ECU would have pulled boost like it had in the past..... A valve just let go, it's as simple as that.

After talking to a very well respected tuner here in the UK, he said that valves that have been used in a badly worn guide will have been subjected to higher temps and will be weakened as a result. He would never reuse a valve that has been in a worn guide in a turbo engine.
It can't be anything else, i've just been unlucky...... Again
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Jonathan.
87 930, 993 turbo engine, RS Tuning 520PS/515lbf-ft, Arrow Rods, ARP hardware, Solid lifters, G50-50, RS Flywheel, 890nm Sachs clutch, RSR coil overs all round, 993 C4 calipers front, 930 fronts on the rear, Ruf Speedlines.....
Old 540 BMW, XB12S Modified, for being a total hooligan
Old 10-19-2011, 12:43 PM
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Oh my, very sorry for your loss. That is some serious carnage, I don't think my engine damage ever made it all the way through a piston, that is remarkable actually. I am speechless but like a phoenix I am sure you will rise from the ashes of this incident to a better rebuild.
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Lincoln Phillip
87 930 Motec EFI M600 G50/50 TurboKrafted Hell Hound.
Jeep, Chrysler, Dodge, Ram, SRT & AEV Dealer pm me for your Mopar needs.
"the 930 is THE CAR that started my PORSCHE love affair..." Magnus Walker
Old 10-19-2011, 02:25 PM
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good luck with the repair - sorry it happened to your 930.
E-man
Old 10-19-2011, 02:48 PM
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Cheers guys, it's a real shame, not really sure what else i could have done to be honest, thought when i had the heads rebuilt and fitted the new rods the engine would be staying together for a very long time....... It seams if stuff will go wrong it'll either happen to me or Lincoln.....

Getting the crank, rods etc all balanced, will have new bearings, cam chains obviously..... New rings, valves, guides and springs too, so complete rebuild this time. Can't think of anything else that i can do, my tune isn't excessive and it's designed for a stock 993 turbo engine, so with stronger rods, mechanical rockers, and everything balanced etc i can't really do anymore!
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Jonathan.
87 930, 993 turbo engine, RS Tuning 520PS/515lbf-ft, Arrow Rods, ARP hardware, Solid lifters, G50-50, RS Flywheel, 890nm Sachs clutch, RSR coil overs all round, 993 C4 calipers front, 930 fronts on the rear, Ruf Speedlines.....
Old 540 BMW, XB12S Modified, for being a total hooligan
Old 10-19-2011, 03:03 PM
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We are the lightning rods for the rest of the turbo world hopefully the balance will swing in our favor, and soon.
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Lincoln Phillip
87 930 Motec EFI M600 G50/50 TurboKrafted Hell Hound.
Jeep, Chrysler, Dodge, Ram, SRT & AEV Dealer pm me for your Mopar needs.
"the 930 is THE CAR that started my PORSCHE love affair..." Magnus Walker
Old 10-19-2011, 04:02 PM
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Quote:
Originally Posted by SCHNELE View Post
We are the lightning rods for the rest of the turbo world hopefully the balance will swing in our favor, and soon.
Would like the balance to swing in my favor soon mate, will be a first
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Jonathan.
87 930, 993 turbo engine, RS Tuning 520PS/515lbf-ft, Arrow Rods, ARP hardware, Solid lifters, G50-50, RS Flywheel, 890nm Sachs clutch, RSR coil overs all round, 993 C4 calipers front, 930 fronts on the rear, Ruf Speedlines.....
Old 540 BMW, XB12S Modified, for being a total hooligan
Old 10-20-2011, 05:00 AM
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Sorry to see this Jonathan.
The piston has taken a hell of a beating.
On the bright side (if there is any), wintertime soon so you have time to rebuild during winter :-)
Had to do a rebuild myself this summer.
It was hard to take the first two days, then I just was looking forward.

Good luck with the rebuild
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Trond R.
1979 930: Garret GT35r turbo, EFI, carerra intake, Link EMS, custom GT2 cams, 98mm JE P/C, 964 crank (stroker), custom valves & ported (XtremeCylinderHeads) etc..etc..
1972 914-6 GT replica project
1986 944 Turbo
Old 10-20-2011, 09:45 AM
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Wow...talk about major carnage! Sorry to hear about the valve failure. I hope your rebuild will go quick. Keep us posted of your progress will ya?

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'87 930
Old 10-20-2011, 04:58 PM
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