3.0 CIS System Complete 1983 Whats it worth
 

Have 3.0 CIS system off my 1983 that is 100% and working excellent. What's it worth? BTW I've searched and it appears no one is selling a complete one or one that works perfect.

Thank you,
Joe

The fuel distributor, warmup regulator, airbox and air regulator are normally sold separately. Not much demand for the whole works.

I had a friend doing a full rebuild who bought a "complete" CIS. It ended up being a bit of a hodgepodge, and I'm not sure what he paid for it. I'll ask.

83 cis
 

Is the system a big tube euro or a small tube US lambda system, will make a difference on price and demand, i am sure Tony can give you a good idea what the value is.

I got $400 for a complete, early 78-79 big intake runner system a couple years back. it was a nightmare to package and ship.

Thanks guys, appreciate the feedback.... I've already had offers for $500 just because people needed some misc. parts. Thought is would be helpful for someone doing a build that needed the whole setup.

Complete CIS unit.........
 

I have purchased so many CIS units the over the years and I’ve lost track of the total count. Here is a picture of the good AAV and got more in another box.

http://forums.pelicanparts.com/uploa...1555008213.jpg

http://forums.pelicanparts.com/uploa...1555008213.jpg

The price of the used parts has gone up compared to 5 years ago. As of today, I will pay between $400~$600 excluding shipping cost for a complete CIS unit.

Tony

Consistent with what others are saying, my friend reports he actually traded one set for another plus... but he'd would guess $500 depending on warm-up reg etc.

Unless your SC is a beater I would keep the OEM CIS. Will help resale down the line. Actual selling prices for full systems are pretty low unless you find the right buyer or someone looking for quality over price.

Agreed, the CIS is part and parcel of SC ownership.

Having said that, unless it has just been rebuilt and calibrated, working perfect is a big claim. Even then, we are talking near 40 yr old parts here.

Only a caveman would want to keep a relic system like that installed if another, better performing option were available (financially, expertise -wise, etc.), pNutz!

Not going full caveman !!

But yeah, that path ends somewhere for everyone. Speaking of better performing, I bet an electric drivetrain kicks your turbo azz !!

If the contest is, the car that consumes more fuel per mile when operated wins, then that's me!

gunna take the domino out today for what is likely the last ever skyline/hwy9/hwy84 & vicinity run before it goes on the trailer headed for twain harte next week. I expect to get 10-12 MPG so ill need to stop for fuel on my way up. good thing I CAN afford that...


regarding saving a CIS system for an SC reinstall or to include with a future sale is kinda hollow. if you are, god forbid going to carbs or EFI the CIS engine bay wiring harness needs to be thinned out so extensively it would be impossible to go back. unless of course you want harness connectors from the complicated 180HP 70's era injection system muddying up what otherwise is a beautifully simple, clutterless engine bay...

another CIS harness would cost more than the system itself:(

Tobs, the best way to beautify a 911 engine bay is to cover the entire top of it with a pimpalicous, full bay intercooler! Yer welcome!!!

a well tuned carb's intake velocity cools the combustion air nicely.....

BTW - our cars have very similar fuel comsimpipn numbers - around 9-12 mpg highway for me, depending on how much boosting I do (which is as much as possible - the point of owning a car like this, of course).

Thanks guys. PMAX perfect in Porsche terms...how’s that for an explaination.:). Juan yes I’m going to carbs and can’t wait. It’s taking me back to my first bug that I ran dual carbs on and had a blast with. I’m smiling as I type this. Wiring harness it will be well presented in the engine bay. Looking forward to 13-14 mpg and don’t care. That electric car mentioned above is faster and getting better gas mileage but what fun is that. BTW ‘83 SC is in a ‘74 so don’t need the CIs for originality.

Love the comments keep em coming.

don't tell pnutz that you are going to carbs!!! he will lump you in with our "clan of the caveman" crew....

he and his sansei will shudder & cough like a poorly tuned CIS system...

silly, silly pnutz….:D

some inspiration hopefully....


http://forums.pelicanparts.com/uploa...1555090270.jpg
http://forums.pelicanparts.com/uploa...1555090270.jpg



;)

Such a pretty engine compartment.

That fan is fastidiously clean. What's the caveman beauty secret ?

The difference is you are actually making and using that power , as if TurboRaw needs more encouragement.

You're no caveman chugging on ancient systems and spewing it out and into the case.

pNutz, two areas where the Turbo CIS goes full caveman is at boost onset and sudden closed throttle - both situations create an excessively rich condition since the prehistoric fuel system is a slow responder (maybe not as slow as carbs would be in similar conditions).

Oh, I hear that Toby keeps his fan assembly clean and tidy by polishing it weekly with a diaper (same thing he does with his ****, but that's a daily routine! :eek:)!!!

Love it. Thanks for sharing. Exactly what I needed. I think I saw something on here about pnutz being a Negative Nellie on Carbs. 😁. Find it interesting that 2 of the top engine builders around who happen to be on the west coast still recommend carbs if you want a peppy, fun car to race around at half the price of Motec.

Don't get me wrong. If you are having a pro install and tune them, by all means, go for it !

DIYers have a steep hill to climb. Check out the tech forum and see how many carb types are still around compared to CIS.

Pro install and tune for sure. There are some things that are better for the pros and not worth the headaches. What I leave for the pros: electrical, painting, engine building... I’m good at disassembly and washing my cars 😁.

why thank you for the kind words sir! it was media blasted with a very fine grit and clear coated is all. it does not look nearly as fetching these days a few thousand miles in unfortunately. but thank you again none the less.

the set pictured above I reacquired from jerry woods after having run them on my spec car for a couple seasons and trading them to his shop for a set of 46mm PMOs that they tuned during dyno set up when I rebuilt the race motor. the one's pictured were set up and dyno tuned for an early stock 3.oL per class rules (stock CIS pistons, cams and running pump gas, although installing the higher compression euro pistons was allowed which I did when the motor was redone).


moving them to my current motor that I built with hotter cams and 9.5/1 pistons it was a challenge to get them set up right learning as I went. I did not have the money to dyno tune it and it took the better part of 3-4 months of weekend work/learning to get them sorted out. there were days I was crying in my hands as I could not get it to lean out with it running rich across both circuits. im better for having gone through it and it runs very good now with it remaining a bit rich on the idle circuit, but right where it should be up high at 12-13 AF ratio making great power.

I will be moving in the coming weeks from sea level to points 4000' and beyond and the crying into my hands very well may ensue again while trying to get them working up there. I took copious notes during the 1st set up effort and I will likely study them again to address the thinner air at altitude and what tweaks I will try to address what im experiencing.


pnutz will be the 1st to tell you carbs are not set it and forget it type of fuel delivery system so you will be best served by learning about them from the outset or the experience may not be a good one. as a regularly scheduled example I have to adjust the air fuel screws some as the season fuel blends change (see you're in a cal metro area like me) from summer to winter and visa-versa to compensate. although that has as much to do with air temps as fuel blends.


im no carb "master", although raw might suggest im a master baiter but learning what makes them tick is a must IMO. max is correct to some extent in referring to we carb guys as cavemen and we are for sure in the minority (im real good with that). if you follow along regularly in the 911 tech forum at all I suggest that there are far more problems brought to light with the 40 year old CIS systems per capita than our carbs. we have to be semi-masters of our own domain because true carb masters are getting harder & harder to find in todays indy shops and running a car to the shop every time a bit of crud gets lodged in an idle jet would become a pain.

now for what raw will call a forum bromance, if you have any questions PM me and id be honored to share what's left of my carb knowledge not expressed above...

t

Cis
 

A well tuned CIS system is a wonderful product.Most people just do not set them up correctly.A 3.0 at 10:1 CR with good exhaust and 964 cams makes 235-240 hp.Euro CIS only for big port or Carrera 3.0.All the others are worth less for sure.Ciao Fred

plus, they look cool as balls. when has anyone ever said that about a motor topped with a CIS system that didn't include an inner cooler?

to remain on topic I got $400 in late 2016 per my notes for a BP system that "worked when removed". did I mention packing it for shipping even partially disassembled was a tall field to mow?...

Cool as balls is the goal :) I'll probably just give my CIS to my mechanic as he wants to use it for parts and have him knock some dough off my build. Thanks for all the feedback and can't wait to get 13 mpg and being able to open the engine cover and have the cool factor. Practical no... cool yes. 46 PMO's going on a 3.2 SS , SSI's should be run and net around 225...think faagpar is being very optimistic in his claim.

Youse carburetor cavemen crack me up!

Why settle for just poor fuel mileage when you can have that, AND (thanks for the tip - just the :eek: - Toby!) azz whipping accelleration?! Turbo powaaahhhhhh, bros, turbo powaaahhhhhhh!!!!

Plus you get an engine bay that is full of old-school bling!

Yer welcome!

:D

bold is the new green

FaapTabulous Fred knows a thing or two about a thing or three about these cars!

Damn straight!!

https://uploads.tapatalk-cdn.com/201...dd0133400e.jpg


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The boost boys will never know the anazing sound of the engine as a set of carbs crack open. The closed system and the impeller on the turbo really hinder the sound that is a flat six on full song.

that, THAT made me tear up some...

^^^ Must be one awesome butt dyno.

It’s more than just a butt dyno. A set of Webers, without changing cams or pistons, will increase the power of an SC lump by 10%. Just that and a set of SSIs make an SC that can pull on a 3.2 Carrera and it’s FI.