When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.
About 10 years ago my dad traded his F150 straight up for an '88 S4. He spent a little time and money to bring it along, and now it's my turn. It's not perfect, but I'm ok with that. The previous owner installed a Vortech supercharger, which is a fun novelty, but I'm pretty sure it's not functioning optimally and I'm not really sure where to start to sort that out.
My overall goals:
Learn enough to do the odd job and fix what I can
Try and figure out what on earth was done when the supercharger was installed (random switch mysteries)
Keep it running for as long as possible and not spend my kids college fund in the process
Here it is:
Looking forward to jumping into the community. Cheers.
Last edited by BillsMafia928; 12-08-2023 at 11:46 PM.
You're absolutely correct on the supercharger maintenance piece. I'm hoping to start working through that now that it's in my hands... just as soon as I figure out what it is I need to do... I had a local Porsche mechanic spend some time with it to make sure it was in decent running shape but they didn't get into he supercharger at all.
I believe it was originally a California car, but I think it's spent a lot (most) of it's life in Illinois. It almost sounds like you recognize the car?
The very first step to do is take a crankshaft end play measurement to make sure the engine is healthy to continue as a project. From what I can see, it seems to be an automatic which makes this check crucial.
After that is to check the coolant and ensure there is no oil in the coolant. Too many 928 engines are being found with severe head corrosion.
The very first step to do is take a crankshaft end play measurement to make sure the engine is healthy to continue as a project. From what I can see, it seems to be an automatic which makes this check crucial.
After that is to check the coolant and ensure there is no oil in the coolant. Too many 928 engines are being found with severe head corrosion.
HTH.
Good catch: it is an automatic. I drove the car up from Nashville this summer and had fluids done from front to back. No oil in the coolant at this point in time (knock wood).
There is a part of me that would like to try and go back to stock and clean and replace bits in the engine bay as I go, but I've been strongly cautioned against such a move. The enthusiast I spoke to (who seems sound of mind) cited lack of parts and general worm-can-opening that might occur. I assumed that was sound advice unless those here feel differently.
Good catch: it is an automatic. I drove the car up from Nashville this summer and had fluids done from front to back. No oil in the coolant at this point in time (knock wood).
There is a part of me that would like to try and go back to stock and clean and replace bits in the engine bay as I go, but I've been strongly cautioned against such a move. The enthusiast I spoke to (who seems sound of mind) cited lack of parts and general worm-can-opening that might occur. I assumed that was sound advice unless those here feel differently.
I disagree - I have brought two 93 GTS's back to stock. One had a twin screw supercharger and the other was a 6.5L stroker.
I believe all the parts you need are available new or used. And you are going to have to bring it up to snuff anyway.
12-08-2023, 11:44 PM
New (to me) 928 - supercharger content within
