Engine build progress
- Thread starter TTM
- Start date
George Elliott
New member
Excellent news, great to hear of your progress Thom. They do get a bit light as the leptons increase, Graham, did you find a big stability improvement with your splitter? George 944t
TTM
Well-known member
Thanks! Graham, the rear wing is already at its lowest adjustment, and yes I added a splitter last year which has improved front end stability, but it does not feel quite stable enough yet, and I can't really pretend using a larger splitter because it will destroy on my driveway. I suppose I will have to try with a rubber hatch.
That's great to hear Thom! After such a long and frustrating series of tests without success I'm sure you're very glad to have finally found the culprit. Interesting that the Ti springs could throw fake knock sounds. Even though hi end builds are comparatively rare, you would think that there would have been others to experience 'fake knock' with Ti springs/retainers before? Glad that you're finally having some fun with it. 1.2 bar should be nice and fast with tons of torque. Be good to see a dyno chart of yours once you get it running as you like it. What splitter do you have? You might need to wind the front ride height down just a smidgen to see if a bit of rake helps. I know that quite a few people have suggested that my recent incident could have been due to the OEM hoop spoiler and large front splitter, so maybe try a hoop one? Although at the speeds your car is capable of I think I'd rather strengthen the downforce at the front than weaken the rear! [
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]Pat I think the springs were not Ti, just the retainers. Its just a weight saving thing on the retainer but I guess not all Ti retainers are made equal and there are also compatibility issues with mixing and matching parts. I run Ti retainers with stiffer valve springs on mine at the recommendation of Milledge, who I bought the cam from but they are a matched set (springs and retainers) and designed to go with the cam I run. No issues on mine. Good to hear your car is on the right track again Thom and I watch with interest to see what boost levels you can tune to with the J&S (which I also have). I know what it is like to chase gremlins trying to fix a particular issue for a long time and get nowhere! Pat, sorry to hear about your most recent mishap, I hope you work things out and get to the bottom of the problem and of course glad to hear you are still in one piece.
TTM
Well-known member
About time to inject this old thread with some more engine porn. Sly's got pretty much everything needed for his 3.0T 16V engine build.
As for the specs, this will be a 3.0T 16V engine based on a 968 lump, with : - Pauter rods - Custom 8.5:1 Wössner pistons - a mahoosive turbo Sly may want to expand on later - I concede I've been taking the pi$$ at him for it being so large but it might actually work - multi-puck Spec clutch, said to be ok for road use This will be still running the now old but vastly proven Vitesse MAF.
TTM
Well-known member
Just thought I'd mention the White Rabbit is now running a Garrett GTX3076R with a Tial 0.82 A/R turbine housing. Installation required some welding skills to modify the exhaust. I used the T4->GT adapter mount from ATP and had to grind the engine mount as the GT center cartridge is much narrower than the T4R unit as used on my SPS turbo, meaning the Tial housing would otherwise hit the engine mount. Only driven the car 20 miles so far without any boost, and can only say that the turbo is louder and whistles with the smallest throttle input, while the SPS was much quieter. I have heard about oil leaks when using the ATP mount so I made an additional shim but I'm not sure if that will be enough - fingers crossed! Pleased to say the SPS turbo will soon be nesting on a another 3.0 8V. Actually, if I hadn't met up with someone with serious welding skills and if the buyer of the turbo hadn't shown repeated interest in buying the turbo from me I'd have happily kept it. Just as if I hadn't spent tens of hours on tuning the engine already, it looks like some more time will be needed... It's really an illness, isn't it? [8|]
I'm guessing part of Paul's questions might be regarding what about the GTX do you suppose may be better or different to the SPS version? (Good to know where the SPS is headed also. He deserves some good fortune at the moment.) I'm very interested to hear of your results with the new turbo Thom. I think it should be just about perfect for your build all things considered. If anything I might wonder that you generally prefer to run at a slightly lower psi than is optimum for those turbos but I still believe it should be a great choice and open for more improvements in the future. []
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