It's a really good starting point but lacking in images which makes it a bit hard to understand some aspects. Now that I have a 1983 8V turbo it's not so bad but without access to a turbo car to compare against it could be quite daunting as it's a fairly major change in configuration.DeLorean said:
The N/A to turbo instructions linked to above are for C900's.I couldn't find anything particular to c900's. Do you know of anywhere that has one, or even an aftermarket kit that would work/be compatible with the classic 900?
Obviously it's more complex than just swapping the turbo over. But the link Jeff posted was to a site explaining what needs to be done to convert a N/A C900 to a Turbo, and which bits to use and where to get them etc.It could be done your way Amish, but what about the compession ratio? What about having APC work, Yes I know ypu could do megasquirt, but like I said it becomes alot of work to convert one.
Most of those parts are from an OEM Turbo car, adapted for use on an N/A car.Taking a non-turbo saab engine and making it into a turbo is a very easy task, obviously because there is no fabrication needed for oil lines or the exhaust manifold. The first step is acquiring all of the mechanical parts needed for the conversion. The following is a list of the parts needed:
1) turbo from a 16 valve turbo
2) exhaust manifold and turbo brace which extends down to the block from the turbo
4) turbo fuel injectors
5) turbo oil lines
6) oil filter housing from 16 valve turbo
7) oil cooler
8) oil cooler lines
9) turbo plumbing to and from the intercooler
10) possibly wiring harness and ECU from 16 valve turbo, depending on the level of boost. I'll talk more about this in the engine management section.
12) bypass valve
13) some form of boost control, wether it's APC or a manual boost controler
14) NGK BCP 7ES or 7EV spark plugs
Unless someone wants uber-boost in the 10+ range, there's no need to go to extremes of completely re-wiring the car. I'm going to add a turbo to my 89 16V n/a car soon and if I do any major changes, it would be replacing the block with one that has lower compression pistons but I don't intend to do anything about the electronics initially. I'll be using the stock EZK and LH systems as already fitted to the car, with the only key control change being with the distributor.If you "do it right" and use APC I can imagine it would be a lot of dinking around and running harnesses.
On the other hand, if you throw a turbo on a non-turbo motor, get it all plumbed up with a good intercooler (not any OEM saab garbage) and keep the boost 5-8 psi you can have a pretty peppy car.
I suppose there would almost have been a n/a to turbo upgrade kit available if you looked at stuff that aftermarket suppliers were selling a few years ago compared to now and combined things from a few places.I was more interested in knowing if an there is an aftermarket kit for some other type of vehicle that could be used on a c900 feasibly. I've seen so many for the import market, and figured that there might be options. Just curious because I just purchased a 1989 c900 N/A...a new addition. I will post pics when I get time. Thanks for the info though!
FYI, 10psi on a n/a motor with the right timing and fueling is a blast!I ran into one of the local Saab guys the other day, and asked him about N/A to turbo conversions. He claims that it's not worth it based on the differences in compression between the engines. He claims that if you don't change the pistons you won't be able to go over ten psi anyway, and it will knock like crazy. Just wanted some clarification to feed my curiosity.