928 Performance Enhancements
10-29-2012 | 08:55 PM
#31
Three Wheelin'
Joined: Apr 2011
Posts: 1,778
Likes: 0
From: Singhampton, Ontario/London, Ontario
Now see here... what you gotta do is go down to your local TSC and buy some blasting sand, run a hose from a non ported vacuum source (before throttle plate) and bury it in the bag of sand. Now start your car, and let the sand do it's own work of carving your head up for perfect airflow. No need to spend 2K getting a port and polish job...
LOL
LOL
10-29-2012 | 09:57 PM
#33
Former Vendor
Joined: Feb 2004
Posts: 2,139
Likes: 0
First thing to do is to check the crankshaft end play and the health of the front flex plate!
Couldn't see anyone recommending this crucial check in this thread.
There are more than a few 928 auto owners who wish they had done so before buying all the nifty go fast stuff...
Beautiful 928 by the way!
Couldn't see anyone recommending this crucial check in this thread.
There are more than a few 928 auto owners who wish they had done so before buying all the nifty go fast stuff...
Beautiful 928 by the way!
10-29-2012 | 10:08 PM
#34
Three Wheelin'
Joined: Mar 2011
Posts: 1,805
Likes: 500
From: Columbus, OH
Two people recommended checking the flex plate... is the crankshaft end play a separate issue? I have a manual tranny so I'm unfamiliar with these issues.
Listen to these people... they are the best resource money CANT buy
Listen to these people... they are the best resource money CANT buy
10-30-2012 | 12:56 AM
#36
Instructor
Joined: Sep 2006
Posts: 247
Likes: 0
From: Perth Western Australia
Hi
Post #37 in the "Admin - NEW VISTOR" post at the top of the list has a how to guide to check the crank shaft end play.
I have an 86.5 and can thoroughly recommend the chips from Porken with his suggested setup. It is like driving a different car. Just got the latest updated chips, just need some time to install.
Also look at the other suggestions above, also the bowden cable makes a big difference when set correctly.
Enjoy!
Post #37 in the "Admin - NEW VISTOR" post at the top of the list has a how to guide to check the crank shaft end play.
I have an 86.5 and can thoroughly recommend the chips from Porken with his suggested setup. It is like driving a different car. Just got the latest updated chips, just need some time to install.
Also look at the other suggestions above, also the bowden cable makes a big difference when set correctly.
Enjoy!
10-30-2012 | 02:22 AM
#37
Three Wheelin'
Joined: Feb 2009
Posts: 1,810
Likes: 0
From: Washington "Dc"
wow we have similar cars, yours being such a nice example from the pics.
Those seats looked very mint.
Like the others said, filters, fluids, fuel lines (inspect the transmission lines as well), timing belt service is pretty standard. Low miles unless that stuff has been done recently could easily result in aged parts. Play it safe and just spend the time (and money).
Other than that you can go with the Porken chips like everyone said you can get to the 310+ range for Hp and have a very solid mature feeling car.
Congrats.. You scored big.
Those seats looked very mint.
Like the others said, filters, fluids, fuel lines (inspect the transmission lines as well), timing belt service is pretty standard. Low miles unless that stuff has been done recently could easily result in aged parts. Play it safe and just spend the time (and money).
Other than that you can go with the Porken chips like everyone said you can get to the 310+ range for Hp and have a very solid mature feeling car.
Congrats.. You scored big.
10-30-2012 | 03:00 AM
#38
Rennlist Member
Joined: Sep 2007
Posts: 12,155
Likes: 371
From: Johnson City, TN
Very nice car. Quite an unorthodox way to come up with what might be a good one without a prepurchase inspection. You've rolled the dice and perhaps won, regardless of price!
I'd want to do a timing belt / water pump job using very specific parts sources before driving far.
Fuel lines, too. Maintenance first.
Flexplate deflection is a visual indicator of preload and a reminder of the inherent design issue.
Endplay measurement is the money shot. We've seen countless folks relieve pressure but not get a measurement on Endplay. Proof is in the numbers.
Most of the cars I've checked had very significant deflection, but endplay well inside spec.
Fitting an auxillary clamp that restricts the recurrence of endplay is the necessary modification.
Constantine has championed this cause. Many of us wouldn't know about the issue otherwise.
I'd want to do a timing belt / water pump job using very specific parts sources before driving far.
Fuel lines, too. Maintenance first.
Flexplate deflection is a visual indicator of preload and a reminder of the inherent design issue.
Endplay measurement is the money shot. We've seen countless folks relieve pressure but not get a measurement on Endplay. Proof is in the numbers.
Most of the cars I've checked had very significant deflection, but endplay well inside spec.
Fitting an auxillary clamp that restricts the recurrence of endplay is the necessary modification.
Constantine has championed this cause. Many of us wouldn't know about the issue otherwise.
Last edited by Landseer; 10-30-2012 at 03:20 AM.
10-30-2012 | 04:05 AM
#40
Rennlist Member
Joined: Jun 2005
Posts: 9,968
Likes: 785
From: Oman
In your situation first thing I would do is find the nearest lister who knows these cars, buy him a few beers and before he drinks them get him to test drive your car for a feel type comparison. Better still, if you can get the car to a dyno of proven provenance get a benchmark to see how it performs and then you have a benchmark to build on.
When you are confident you have all the regular known troublesome bit working to spec, then you can think about improvement.
The first thing I need on any car I buy is confidence in my tyres. If you are sure what you have is tip top then fine but do you know with any certainty none of them have been curbed? Whereas I do not charge around too hard these days the thought of driving one of these things flat out without knowing the tires are exactly how Fatboy Michelin built them boils what little is left of my brain.
Regards
Fred
When you are confident you have all the regular known troublesome bit working to spec, then you can think about improvement.
The first thing I need on any car I buy is confidence in my tyres. If you are sure what you have is tip top then fine but do you know with any certainty none of them have been curbed? Whereas I do not charge around too hard these days the thought of driving one of these things flat out without knowing the tires are exactly how Fatboy Michelin built them boils what little is left of my brain.
Regards
Fred
10-30-2012 | 11:10 AM
#41
Thread Starter
AutoX
Joined: Oct 2012
Posts: 12
Likes: 0
From: Bentonville, AR
In your situation first thing I would do is find the nearest lister who knows these cars, buy him a few beers and before he drinks them get him to test drive your car for a feel type comparison. Better still, if you can get the car to a dyno of proven provenance get a benchmark to see how it performs and then you have a benchmark to build on.
When you are confident you have all the regular known troublesome bit working to spec, then you can think about improvement.
The first thing I need on any car I buy is confidence in my tyres. If you are sure what you have is tip top then fine but do you know with any certainty none of them have been curbed? Whereas I do not charge around too hard these days the thought of driving one of these things flat out without knowing the tires are exactly how Fatboy Michelin built them boils what little is left of my brain.
Regards
Fred
When you are confident you have all the regular known troublesome bit working to spec, then you can think about improvement.
The first thing I need on any car I buy is confidence in my tyres. If you are sure what you have is tip top then fine but do you know with any certainty none of them have been curbed? Whereas I do not charge around too hard these days the thought of driving one of these things flat out without knowing the tires are exactly how Fatboy Michelin built them boils what little is left of my brain.
Regards
Fred
10-30-2012 | 02:17 PM
#42
Rennlist Member
Joined: Jun 2005
Posts: 9,968
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From: Oman
My dad has all the service manuals and knows these cars inside out. We will do all the maintenance. Timing belt, water pump, flex plates, plugs, wires, fuel hoses, ect. Has the original tires with great tread, but I dont trust them at all. Ordering some Nitto's and replacing the shocks. Just wanted to know what performance things to run. Sounds like Porken is the way to go.
Without doubt Ken has worked marvels with this model. I have his handy work for cam adjustment and it works superbly. Take a look at his thread on cam timing effects- fascinating reading. However, Also not that if you have an auto tranny you should think about what will work on that. Given the auto box wants to change at about 6k rpm a chunk of top end benefits may not be for you. Speak to owners of auto's who ahve fitted this chip set mod to get their input- for a manual it is a non brainer but even Ken in his thread suggests that for auto's advancing the cams may be is a better option- where that fits in with his chip set programme I do not know but advancing the cams does limit the amount of advance you can run with I believe.
Good luck with your new purchase- sounds as though it has a good owner. If you have the maintenance covered then indeed an x-pipe and chipset the way to go for your model I suspect.
Regards
Fred
10-30-2012 | 02:27 PM
#43
Advanced
Joined: Apr 2012
Posts: 98
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Thanks for all the feedback. Drove it home from Chicago last Thursday. 500 miles, no hiccups. Great fuel economy. My dad bought a Cayenne in NY and he did just a little better in mileage. Funny part is, his 06 has 64k, my 86 has 52k. I don't want to do to much to it, because of the originality of it. Its in absolute perfect shape. It was all a blessing in disguise. We flew into NY Tuesday morning, I had purchased an 87 S4 in Monroe, upstate. I overnighted the check Monday morning and planned on shipping the car. Dad calls mid day and said he bought one 60 miles away, so we flew up to drive them home. Drove his Cayenne from the city to Monroe, where the 928 was. OMG, what a total misrepresentation. It was pouring outside, so everything in the car was wet it leaked so bad. Battery dead, when we did get it started it was spitting and sputtering terrible. We drove it about 100 yards, throttle got stuck and almost killed us, clinking in the tranny. Piece of ****. Its back on ebay and I feel bad I cannot warn others of this fraud. (1987 s4, Monroe NY, seller Monroehandyman). Anyway, got my cashiers check in my hand and we headed home in the Cayenne. Since we had to pass thru 5 states and I had a cashiers check burning a hole in my pocket, I was on the Ipad looking. Came across this one in Periora, IL. God was taking care of me on all of it. Could have been such a costly disaster. So far I am very happy. Really wanted the 316 hp S4 though. So now Im going to bump it with some goodies.
P.S. How do I post pics?
P.S. How do I post pics?
10-30-2012 | 02:39 PM
#44
Three Wheelin'
Joined: Feb 2009
Posts: 1,810
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From: Washington "Dc"
Jhoupe > If you have WSM and are ready to tackle this then you are sitting pretty man. Seems like all you really need is a claybar detail job and a few beers .. I think you may have gotten the score of 2012 so far. Congrats again. Always glad to see a Dunkle/Tan S3 , I consider them the best of the breed (well, maybe a LSD equipped S3 Dunkle/Tan would be slightly better , but ...)
Time to break out the bubble wrap ?
Time to break out the bubble wrap ?
10-30-2012 | 03:09 PM
#45
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My dad has all the service manuals and knows these cars inside out. We will do all the maintenance. Timing belt, water pump, flex plates, plugs, wires, fuel hoses, ect. Has the original tires with great tread, but I dont trust them at all. Ordering some Nitto's and replacing the shocks. Just wanted to know what performance things to run. Sounds like Porken is the way to go.