Brad Roberts

Great answers :) It really is just a matter of pressurized items losing pressure after sitting for a short period of time. The other Porsche's that rattled badly after sitting: early 944's and 928's. They used a MUCH larger hyd. cam follower and would "leak down" over time. It sounded like what most of us would call a "death rattle" but it quickly went away after 30seconds or so :) The GT3's all use a *tiny* lifter compared to the 44 and 28. Matter of fact, I could hide a GT3 lifter inside of a 44 or 28 lifter :lol: B

I need some more time to think about it. Thanks for the update on what has been done so far :) The clutch vibration is a new one for me, but my network of race and factory techs will *probably* yield an answer for you :) Give me a day or so. First thoughts are: Clutch Bobby, without giving me your address, what city are you located in? b

I can add up on one hand how people on the "6" build tranny's (advertisers with shops, not users) I do not frequently visit Rennlist. I left the "list" a couple of years after it changed from the Porschefiles era 2001 or so when "Dunk" still owned it. All these tranny issues? I'm claiming the short shift causes premature wear inside the tranny. With your stats in place, can you tell us when Porsche released the SSK? How many years AFTER B&M did they release it? Please understand Porsche is in the business to make money. If you recognize (what? 6-7 years later?) that another company is making a simple part that is selling well, wouldn't you as a business want to jump in on that market and offer a "factory piece" ? A factory piece that is identical in every way? I never debated it was the same piece in different wrapping, but that does not mean it does not contribute to premature wear in the gearbox. You accused me of drinking the "Porsche juice", do you honestly believe that "everything" they create (or duplicate in this case) is GOLD? Have you seen the M96/M97 failures?? :lol: Name dropping occurs after building that contact list for 20+ years in the Porsche industry and knowing who kicks buttocks and who doesn't. I will admit to not cracking into my first G96 until early 2000 when working for the Porsche Junior team that year. (Ready for another name?) I worked side by side with Bob Skeen. Bob was the tranny builder for McClaren for years and years until he moved to the states. We re-geared 2 tranny's before EVERY ALMS race (and 3 later on when we added yet another car to the team).. you quickly become intimate with the tranny's in less than a year. All this before you even saw the first 996TT on the road. In 1999 I had GT3Cup tranny's out.. same tranny as the early GT3R, and before that 993 RSR tranny's.. ALL of them the same exact tranny, but shifted with cables in your car and the later GT3R. Someone above asked "what do the pro's use"? None of the pro's before the Sequential box (which is nothing more than your G96 box with a Hollinger straight cut gear conversion) use a short shifter. The tranny will not last 24hrs with a short shifter in place with pro drivers (based on my experience) B

I agree 100%. The first 911 engines had a TON of problems/recalls, but they did not have the internet to spread the actual issues and blow it up. B

Yes that is correct.. they are whoring it out at that price :) Cost is $217.10 and Bosch is OEM :) You will end up finding out it is your MAF :) Promise. B

Thank you sir :) I like where you are going with this, let me know how I can help! B

Yes, but it only records and stores it :) I like where you are going with this :) Smart man... NOW.. why not use the fairly new to market Bosch Motorsports ABS/Traction control? It is nearly plug and play with the 7.8 you plan to use. Just like the other system, it will require wheel speed sensors and such. B

Mike, it sounds like you have some good pieces in place :) You are the first person to mention having the "hot" new ticket item in a public forum (the Hitachi MAF) I installed my first one at GIAC back last summer on an 01TT. They are bullet proof :) Now, onto the issue: So many things can effect timing, it will hard to pin point unless you have easy access to a chassis dyno and can perform multiple pulls. You said something about race gas, is the car pulling the timing back while on race gas? or pump gas? or both? Something as simple as a knock sensor failing or coming loose can cause timing to be pulled out. Fuel pump/s if the pump cannot keep up with VOLUME.. not pressure, it will cause a lean condition which in turn will cause the car to knock and pull timing.. Traction control: if the car is now spinning the tires and causing the traction control to kick in.. it will pull back timing.. Have you talked to ToddZ about this? They sold you the kit and the tuning? B

I'd be a little concerned :( Do this: for $50 you can send off a sample of your oil to the same place Porsche Motorsports uses to diag customer engines BEFORE they arrive for freshen. Run the car and attend your next few track events, when you change the oil again, save a quart and the oil filter and send it off. I'll have to look up the place we use (I don't send it out.. I have someone do it for me) they will tell you EXACTLY what is coming apart in the engine. PM me for the place on Monday or Tuesday of next week :) B

I just grabbed one of my stash of pictures shot from documenting everything I have done.. that particular picture just so happens to have had an arrow already on it. I use them to point out *things*.. I **assumed** that everyone would know I was not point to the oil cooler :) B

I would have talked him down for the all the issues and had the car gutted and stripped to become a race car before the end of the day!! :lol: B

This applies to ALL replacement engines.. it is VERY simple to determine if you have a replacement engine or not in your car :) The replacement engines have NO (I repeat) NO cosmoline on them :) The cars (all Porsches) get sprayed with the cosomline as they go onto the boat for transport to keep corrosion to a minimum during the salty sea voyage :) Replacement engines from Porsche are shipped in a crate and never get sprayed :) Want to know wha you have? LOOK underneath the car. Look for the cosmoline on the transmission.. lower suspension plate.. suspension pieces.. you name it.. if the engine has NONE on the oil pan or the sides of the block.. or on the bottom of the heads near the exhaust ports (it is sprayed straight up towards the bottom of the cars) then you have a replacement engine!! Simple :) b

The million dollar question is: How does it sound accelerating up a hill in 4th gear. The dreaded DRONE that 99% of the crappy aftermarket exhaust companies sell will rattle your brain!! I have cut into several stock Boxster mufflers. Modifying a stocker is pretty easy!! Have welder will travel! B

The cylinders are surrounded by coolant at the top near the head. B

SB? where are you located? I'd like to see this and document it :) If the engine was running fine, I'm willing to bet it is a casting plug from the heads (most people call them freeze plugs, but in fact they are just casting plugs that allow the foundry to empty the sand/whatever after the forging/casting process) Not an easy fix, but not too bad!! Let me know! If you are in Santa Barbara, I can be there on Wed this next week. B

Seriously?? :o B

jr, I feel your pain :( A lot people tend to hold Porsche in this "high" light.. :lol: I have news for them.. um.. yeah.. they cobbled things together just like a race shop would do at the track in an emergency! B

Jr :) You do a compression test with the engine up on TDC for given cylinder. I do compression tests with NO valve train in the engine during assembly :) A collasped lifter will mean it cannot open the valve all the way. Matter of fact: I have done compression tests on 3.8 RSR air cooled engines with Ti valves that were bent.. the valve stems are sooo light/weak, that the valves would straighten up as they went back into the seat!! I'm betting this is a cylinder failure :( Do the leak down and watch for air bubbles in the expansion tank :( Perform it HOT. B

The street cars and the Cup cars used the same part :) B

Yes :) Just replace it. Most of your local Porsche shops keep them in stock. If it is red, it is an old one. The new ones are black. Darn! I cant recall which color is the old one. Haven't seen one for awhile :lol: 996 201 241 03 B

Good call!! Good thing it wasn't a 993 :( it takes about 1 second to break a 993 throttle cable. It runs about 1.5 inches away the from the tranny :( and had a plastic area that breaks if the tranny touches it. B

100% OT: I cut my teeth on the GT3R's working on the car in his avatar :) That is Sears point 2000. First race back from Leman that year :) D_I_C_K Barbour actually had that made into a poster for close friends. I know were 3 of them are hanging in shop offices :) wow.. the ban filter is thick :( cant even use a guys real name.. B

Hi Pete, We do have something available, but we have found it is tough to beat the Porsche Motorsports developed plenums for the GT3R/RS/RSR. The first versions of the current GT3 engine had ITB's (this engine is essentially the water cooled version of the 962 engines) I can get you the flow numbers for the Porsche Motorsports GT3Cup/R/RS/RSR and turbo heads, but it will be Tuesday of next week before I can place the calls. Care to elaborate on your project? :) B

Jim is a smart man :) There really is no need to change the final drive. We do EXACTLY as Jim suggested and shorten 4-5-6 :) I can supply you with contact info for some of the best tranny builders here in the USA. Send me a PM if your are interested. PRO people with 20-30 years of Porsche gearbox building. B

+1 for the 997 GT3 ducts. This is what most of us have gone to on 986/996 track cars :) B