What should be done to a car to prep it for supercharging?
03-21-2006, 03:52 PM
#1
Deer Slayer
Lifetime Rennlist
Member
Lifetime Rennlist
Member
Thread Starter
What should be done to a car to prep it for supercharging?
If a guy was going to supercharge his 928, what would be the list of things that must be spot-on before adding boost to prevent a bad outcome? Assume a car that is well cared for and has no glaring problems, but is not perfect.
Thanks in advance
Thanks in advance
03-21-2006, 04:00 PM
#3
Banned
Join Date: May 2001
Location: The Great Northwest
Posts: 12,264
Likes: 0
Received 3 Likes
on
3 Posts
Suspension and tires otherwise losing your new found power could equal losing it.
If you are going TS you don't have to worry about your intake lines all that much cause your intake will be gone. Just replace when installing new intake.
I also did a belt change and cam timing just to make sure everything was exactly how I wanted it.
Did I mention suspension and tires??
If you are going TS you don't have to worry about your intake lines all that much cause your intake will be gone. Just replace when installing new intake.
I also did a belt change and cam timing just to make sure everything was exactly how I wanted it.
Did I mention suspension and tires??
03-21-2006, 04:09 PM
#5
Addict
Rennlist Member
Rennlist Member
Get the car running to factory spec., do a compression test for general health evaluation. Plan to upgrade the pressure side fuel lines if they are not included with the kit (mine were included). Have the suspension in good order, and plan on wanting larger tires than stock to deal with the extra power.
Big part, plan to have a huge grin every time you drive it!
Jim
Big part, plan to have a huge grin every time you drive it!
Jim
03-21-2006, 04:18 PM
#7
Administrator - "Tyson"
Lifetime Rennlist
Member
Lifetime Rennlist
Member
Clean underwear
Trending Topics
03-21-2006, 04:43 PM
#8
Man of many SIGs
Rennlist Member
Rennlist Member
Any weakness will be amplified while under boost. If your car has a marginal cooling system now, it will only be more strained while boosting. If your clutch is in poor shape and slips now, it will get worse when you put more power to it. The same for cylinder leakdown.
03-21-2006, 04:57 PM
#9
Addict
Rennlist Member
Rennlist
Site Sponsor
Rennlist Member
Rennlist
Site Sponsor
If not done recently , Basic tune-up would be nice new plug wires, caps rotors, plugs, compression check if for no other reason than a baseline before test. Be sure the car has stock chips. FUEL LINES especially if you plan to bump the system pressure.
03-21-2006, 05:56 PM
#13
Under the Lift
Lifetime Rennlist
Member
Lifetime Rennlist
Member
Originally Posted by Jim bailey - 928 International
Bill posting with your Burn out video on this thread somehow just seems WRONG ! 
fuel on the fire so to speak ! Boost too
fuel on the fire so to speak ! Boost too
03-21-2006, 05:59 PM
#14
Developer
Just make sure it is tuned and running well. If there is any cold-start or hot-start problem with the car, hesitation or missing anywhere, correct it now before supercharging.
A dyno pull is a good way to measure if your engine is running well - if you get the numbers the factory published for your car (or very close) consider it well tuned and proceed. If your numbers are low, find out why and fix it.
Besides, you will want a baseline dyno anyway for your before-and-after comparison.
I recommend replacing the spark plugs with one-step hotter during the SC install. This helps them stay clean after we have more upper-cylinder oiling than before. Example: the early cars run Bosch WP-8's normally, and I install WP-9's on supercharged early cars. They burn very clean.
Timing belt and water pump only if otherwise indicatted by the normal rules of 3 yrs or 30,000 miles.
Brakes? Same thing. Normal maintnenance is all that is needed - what you should be doing anyway. Do they have enough pad left? Are the rotors in good repair? If you loosen your grip on the wheel and do a panic stop do you stop straight and true without pulling to one side or another? If yes, they are fine. If no - you should resolve that anyway, supercharging or not. Porsche has always been known for good brakes. Unless you are racing your 928, regular maintenance is all that is needed.
Optional: address any lower engine oil leaks. Depending on the condition of the engine, and the maker of the kit, and the PCV system or oil separation system used - your crankcase may see more positive pressure than it ever has in its life. If you have any oil leaks now (oil pan, for example) it'll leak MORE under pressure. You may want to correct that first.
A dyno pull is a good way to measure if your engine is running well - if you get the numbers the factory published for your car (or very close) consider it well tuned and proceed. If your numbers are low, find out why and fix it.
Besides, you will want a baseline dyno anyway for your before-and-after comparison.
I recommend replacing the spark plugs with one-step hotter during the SC install. This helps them stay clean after we have more upper-cylinder oiling than before. Example: the early cars run Bosch WP-8's normally, and I install WP-9's on supercharged early cars. They burn very clean.
Timing belt and water pump only if otherwise indicatted by the normal rules of 3 yrs or 30,000 miles.
Brakes? Same thing. Normal maintnenance is all that is needed - what you should be doing anyway. Do they have enough pad left? Are the rotors in good repair? If you loosen your grip on the wheel and do a panic stop do you stop straight and true without pulling to one side or another? If yes, they are fine. If no - you should resolve that anyway, supercharging or not. Porsche has always been known for good brakes. Unless you are racing your 928, regular maintenance is all that is needed.
Optional: address any lower engine oil leaks. Depending on the condition of the engine, and the maker of the kit, and the PCV system or oil separation system used - your crankcase may see more positive pressure than it ever has in its life. If you have any oil leaks now (oil pan, for example) it'll leak MORE under pressure. You may want to correct that first.
03-21-2006, 06:13 PM
#15
Instructor
Originally Posted by Jim_H
It is also a good idea to powdercoat your cam covers a this point. Rumour has this is good for an additional 10rwhp. 
