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oil change frequency

Model: 996tt, Year:2004, Mileage:23500, Type of use:Both Street & Track
Hi Guys, I do DE events and change oil every 10 track days. (Mobile 1 0-40). Some members are telling me this is not enough and I should not exceed 5 days. I am in the white group and also do advanced days where I run with black and push myself and the car more. What are your thoughts? Also, what about transmission fluid changes? Thanks, Frank

octane

Model: 930, Year:1986, Mileage:84000, Type of use:Street use only
what is best octane rating for turbo

Engine

Model: 993TT, Year:1997, Mileage:25,000, Type of use:Both Street & Track

930

Model: 930, Year:1987, Mileage:70,000, Type of use:Street use only

oil pressure gage 1979 930

Model: 930, Year:1979, Mileage:53,000, Type of use:Street use only
I recently changed the oil on my 1979 930 and now once the engine is warned up at highway speeds the dash gage seems to bounce up and down when the pressure is at the upper levels of the gage. This doens't happen when the engine is cold. I installed WIX high flow filter, could this be the problem or is the sending unit faulty? Engine seems to have pleanty of oil but this eratic gage gives me some concern.I use BradPenn 10-40 wt oil.Thanks for any thoughts you have on this issue.

Zork Tube

Model: 930, Year:1986, Mileage:52000, Type of use:Street use only
I am considering installing a zork tube. I hear they decrease turbo lag a little. Are they a good mod or not? I also am considering installing the straight pipe from my waste gate. Thank you for your answer in advance.

1997 TT/TT S Check Engine Light

Model: C4S, Year:1997, Mileage:48,000, Type of use:Street use only
Compared to the 1997 993 C4S with the inherent problem of the secondary air - carbon build up and check engine light coming on, does the 1997 993 Twin Turbo and the Turbo S have the same issues?

top end rebuild

Model: 930, Year:1985, Mileage:107000, Type of use:Street use only
when a top end rebuild has been done,how many miles thereafter does a valve ajustment need to be done? thanks for your help. a.j. zamm

993tt

Model: 993TT, Year:1997, Mileage:40k, Type of use:Street use only
Recently bought a '97 993 TT with 40k miles that had engine work that included new rods (carillo sp?), Andial turbos/ intercooler and exhaust (done when it had 34k on it ). Runs great except for noisy lifters when cold which goes away when warmed up ( they were not up graded with the engine mods). Should I worry about any engine problems until I can replace them in a couple of months when I have the $ or do it sooner? I drive it daily and will put about 600 mi/ mo. thanx

ECU software comparisons

Model: turbo x50, Year:2003, Mileage:30,000, Type of use:Both Street & Track

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