Engine build progress
- Thread starter TTM
- Start date
appletonn
New member
Great post update as always Thom and I'm very interested in the snorkel mod - I think I'll get myself a second hand one and have a play with some silicon hose. I've often thought that it must be restrictive but have never thought that sticking a cone filter behind a hot radiator could be anything other than a retrograde step, especially in terms of the air temps and filtering - never been tempted to stick an oily K&N panel one in either[8|] Keep up the great work
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TTM
Active member
Nick, thanks. The mods are being done with stealth in mind, and we thought of totally cutting the bottom side of the snorkel to fit a duct in under but it would have been too visible. Also there is little room to play with - the picture doesn't show that the snorkel ligthly touches the bracket of the pop-up light (the V-shaped metallic thing). Tom, that would be great.
TTM
Active member
We went for another test drive tonight with Sly's car to fine tune the AFR in reasonable driving conditions and it seems the anti-leak paste in the compressor housing has had the effect expected. While the car used to feel rather sluggish at anything below 4k rpm it now begins to push nicely from 3k revs on and has a significantly more progressive power delivery. The shove you get in the back when flooring the throttle in 5th at 100 mph is impressive [] Logs have shown that peak boost pressure has increased from 15 psi to 16 psi witout even touching the accuboost.
] Logs have shown that peak boost pressure has increased from 15 psi to 16 psi witout even touching the accuboost.
Diver944
Active member
Interesting that simply removing the snorkel results in 50% less of a vacumn [] The 968 TRS does away with the snorkel and simply takes it's air through a naca duct in the bonnet I think a 3" plastic pipe that was heated and then formed to be oval shaped for clearance above the intercooler pipes would be a good solution. The actual triangular entry to the airbox itself is larger in area than a 3" silicon hose. The restriction is where the standard pipe is flattened over the intercooler pipes. When my car ran the standard airbox and snorkel, the vacumn before the turbo was so great as to literally suck oil out of the sump through the breather system [:'(]
] The 968 TRS does away with the snorkel and simply takes it's air through a naca duct in the bonnet I think a 3" plastic pipe that was heated and then formed to be oval shaped for clearance above the intercooler pipes would be a good solution. The actual triangular entry to the airbox itself is larger in area than a 3" silicon hose. The restriction is where the standard pipe is flattened over the intercooler pipes. When my car ran the standard airbox and snorkel, the vacumn before the turbo was so great as to literally suck oil out of the sump through the breather system [:'(]
TTM
Active member
Got the flywheel and pressure plate back from the machine shop yesterday (lightening + balancing), and apart from a wideband and exhaust gaskets I have everything needed for installing the engine in the car ... The probem is I have invested so much money and spare time into this project that the frustration accumulated over 2 years of gathering expensive parts and getting things prepared has nearly wiped out the enthusiasm that started it all. Now I almost feel I just don't care much about it anymore and my thoughts are just elsewhere. I would be most grateful for words of encouragement [8|]
sawood12
New member
Hang in there Thom. This is often the way long projects go. It is always worth it once it's all completed. The thing I find when I complete long projects at work is that it is the sense of satisfaction that you have achieved something or been a significant factor and it all works and comes together. The beauty of a project like yours Thom, is that your sense of satisfaction and achievement will be there every time you turn that ignition key and drive the car.
Neil Haughey
New member
Yes Hang in there Thom. I am bang in the middle of a big project too, feeling very tired and spending a lot of money but I am sure it will be worth it in the end, must be the same for you as you will have one awesome motor when it is all done. To put it another way I could never just go and buy a car already all done by someone else, takes away half the satisfaction and pride.
George Elliott
New member
Thom, I know the feeling, and I am sure many others on the forum do too, but dont let it discourage you. Take a look at the RMS failures on new cars costing 10 times our old motors, then you will feel really fortunate[] At least we have a soundly engineered basis to work on, technology we can understand, and lots of encouragement from each other. George 944t
] At least we have a soundly engineered basis to work on, technology we can understand, and lots of encouragement from each other. George 944tPerhaps take a mental break for a short while Thom? Also I find watching relevant videos or getting to the track can often inspire a 2nd wind so to speak. You're very close and it's looking great. Not much to do now. Once you've done it and have been driving it for a few weeks the memory of all the frustration just melts away as you drift through cloud nine. The extra satisfaction of doing it yourself will double the rewards. Hang in there. At least you know you'll be using some good oil. haha []
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marcoturbo
New member
Thom, if you don't finish this project, I come and quick your a** Or, I buy it at a discount price... []
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TTM
Active member
Chaps, thanks for the comments. Driving it is not something I am craving for, as if the custom turbo spools and loads as well as I expect then running the engine in without any boost pressure is likely to be much of a chore - more foreseeable frustration. Must try to stop seeing the glass half empty instead of half full [&:]
All the bits are there so it should all be faster progress now, the summer is coming, maybe we should look for a french trackday late in the year, if a few of us come over then you will have something to aim for [] - says Tony who hasn't had time to do anything to his car for weeks. Stick with it, it will be great when done.
] - says Tony who hasn't had time to do anything to his car for weeks. Stick with it, it will be great when done.
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