Murf stage 1 kit
#16
Rennlist Member
I am working on a similar setup. Obviously it is possible, since Carl has done it, but there are a few tricks that are required. You have three good options: 1) just buy Carl's kit and install it. Forget the PhD project. 2) call Carl and beg for parts and help. It makes no financial sensel for him to do much for you, but he is a good guy and he might. 3) convert to EFI. I am currently working option 2, but planning on option 3 in the long run and kinda wishing I had gone option 1.
#17
Even more reason to not waste money on something that you're going to end up getting rid of anyway.
Yup.
Theres an old saying. You can have two of the following Fast, cheap, or done right. I would argue that you could add easy to the equation. You can get major HP fast and cheap but it wont be done right. You can have it done right and fast but it will never be cheap. You can do it right and cheaply but it will take some time.
#18
Rennlist Member
Thread Starter
Alright.........I get it!
Thanks for all of your help. I can see what I wanted to do, trying to do it in stages would only cost more in the long run.
I will need to be patient..............not my strong suit in the pursuit of HP!
Stephen
Thanks for all of your help. I can see what I wanted to do, trying to do it in stages would only cost more in the long run.
I will need to be patient..............not my strong suit in the pursuit of HP!
Stephen
#19
Chronic Tool Dropper
Lifetime Rennlist
Member
Lifetime Rennlist
Member
I did a high-pressure turbo mod on a CIS low-pressure Saab Turbo many years ago, added a better modulating-pressure solenoid to the control pressure circuit, built analog controller to make it all work, and then spent many weeks with the gas analyzer riding in the car getting it all dialed in correctly. The EFI systems available now are a godsend compared to trying to get all the mixtures right using just modulated control pressure. The CIS injectors are extremely non-linear even with static manifold pressure, so there's more to tuning than just changing pulse-widths on a laptop.
#20
Ever consider just buying a CIS euro S 4.7 motor and dropping that in instead? It's probably within your price range and you'd end up with about the same power as a low-pressure boosted USA 4.5 would...
#21
Rennlist Member
Thread Starter
Lopez Yes I have. I understand that a CIS Euro would be a fairly straight forward swap. Lots of options and not enough money.
Honestly I am thinking about the 80 Euro that is FS. Buy that, swap the parts from my car that I like and sell the 79. Might work.
The sensible thing to do would be to fix my syncro's and maybe a small shot of nitrous and start saving toward my 928 fund.
Stephen
Honestly I am thinking about the 80 Euro that is FS. Buy that, swap the parts from my car that I like and sell the 79. Might work.
The sensible thing to do would be to fix my syncro's and maybe a small shot of nitrous and start saving toward my 928 fund.
Stephen
#22
Captain Obvious
Super User
Super User
If you don't have the funds to cover the project twice then you can't cofortably afford it and might want to wait a bit. There is nothing worse than for something unexpected to come up and not being able to afford to fix it. BTDT and never want to repeat it again.
#23
Nordschleife Master
If you decide to pass on the SC kit let me know I think im ready to boost my 87 Cassirot S4 that i just sunk a ton of money into to get the maintenance up to date!
#25
Drifting
I can only assume he was talking about this one that is still listed in the classifieds:
http://forums.rennlist.com/marketpla...ct/160/cat/all
but it is long gone:
https://rennlist.com/forums/928-foru...tial-post.html
http://forums.rennlist.com/marketpla...ct/160/cat/all
but it is long gone:
https://rennlist.com/forums/928-foru...tial-post.html
#28
I ran a supercharged CIS engine for a few years. You can run boost through a CIS system but you need a blow-off valve before the CIS metering plate. Otherwise, it will run extremely rich under vacuum conditions.
With that said, I would recommend going to an EFI system instead of wasting the time to make the CIS work. You will get far more hp and much better control from an EFI system. CIS is just too hard to make work in this application.
With that said, I would recommend going to an EFI system instead of wasting the time to make the CIS work. You will get far more hp and much better control from an EFI system. CIS is just too hard to make work in this application.
#29
Rennlist Member
Thread Starter
Jim How much boost were you running w/ the CIS before you went to EFI. How much power were you making then and how much are you making now? Also what EFI did you go to and how was the conversion?
Thanks
Stephen
Thanks
Stephen