re Aircare, Gunter is referring to the pollution regs in your state.

What So. Carolina has now and is likely to do in the future re your car & year is critical to your engine modification plans.

Also - be aware that Steve W. has posted that the JE pistons have much less longevity than the Mahles.

There is not a whole lot you can do with CIS. That is one reason people are telling you to get a 3.2L. Minor mods there (chip & muffler) can make a reasonable hp gain.

You really need to look thru Wayne's book and the earlier Bruce A. book to get an idea of what you can do and what gains per dollar will be.

Generally, I think the changes just above are likely going to be best - i.e. go to the "back in time" to the earlier CIS and bigger ports.

Ok, more good stuff being suggested.

Regarding going back to the 78-79 CIS ... how much of a difference will that actually make?

If the difference is minor, I would prefer to stick with the 80-83 CIS. I say this because I now have TWO of them - one that came on my 80 and one that is on the 82. This situation is quite nice b/c I have two of everything on the CIS! Might make it easier to troubleshoot those rare CIS troubles ;). Just trying to be practical in this regard.

Currently I run without 02 sensor - when hooked up I am no pleased with the subtle surging that it provides. Here in SC we don't have vehicle regulations. Maybe down the road we will ... but I imagine that is a long long way away.

Thanks to everyone who has contributed. The info is very much appreciated and I feel like everything is pointing to #3 at the moment. But keep it coming!

I guess I doubt that it is worthwhile - why don't you talk to Steve W. - and have the pollution requirements ready, as he is in Oregon.

I know you've rejected the modified 3.2L already, but... you could sell your 3L collection off...

Haha ... not an option. Unless you want to speak to my wife on my behalf!

The interesting part is that Wayne's engine pick with the JEs, 964 cams, and SSIs is supposed to be quicker than a stock 3.2 - don't flame me, that is what the book says!

but it isn't a cis induction, is it?

Dump the CIS for a set of 40mm webers or 40 or 46 PMOs. With the stock P/Cs, current headers, some head porting, and stock cams you'll make good power (even better with a 964 cam). I've driven this setup and it's a sweet way to go with a 3.0. With dyno tuning you should be able to make 210-220 hp at the crank.

Yep.

That engine pick was the most modest for 3.0 with CIS.

Interesting option as I never really considered webers. I always figured that it would be an expesive / major upgrade.

Cost estimate?

Just a little advice from the been there done that area, the 80-83 CIS is going to need to have the O2 senso bypassed and the idel set to about 1100 to function for you. I've been through a lot of dyno time and wrench time to get this correct. Had I backdated to the an earlier CIS system it would have been easier.

PMOs are about $3,500. I have them on my motor.

Can you do that in SC?

If so, don't forget the labor charges, SSIs, etc.

We may have gotten a bit carried away.

A fresh CIS SC motor that is well sorted is a great motor so long as it has a decent (non cat) exhaust.

Keep your P&Cs if they are good. Build what ya got. A cam regrind is good for about 10-hp. If you are thinking of doing some club racing, scca autox, the cams could put you in a class where you will not be competitive.

If you keep the stock cams, which are good cams, time them like Carrera 3.2 cams.

I like CIS. It is trouble free, does not have any issues under high G turns, and gets good gas mileage.

Carbs are good for about 10hp and better throttle response but I don't want the hassel, fire risk, or expense.

If you like working on your car and fall into a set of carbs, fine. They can make for a fun motor.

The small port heads do flow better than the big port except maybe at the very top end on a well built motor. I talked to a racer that had a 2.8 SCCA race car and his ports were only 35's. He put over 275hp through them. Others were using big ports around 40mm. He was faster out of the corners than they were. I still believe in head work and think reworked small ports, if done right, are better than big port heads.

I remember an article in one of the Porsche mags in the 80's. They did some flow testing of the SC big port heads against the small ports and did not have much good to say about the big ports. I am pretty sure they found the small port out flowed the big. Bigger, is not always better.

If you have dollars left over, use them to set the A/F on a dyno, on suspension, lightening the car, oil cooling capacity, sticky tires, and racing fees.

A light 200hp SC that is well sorted is a quick car. Add a good driver and it is a fast car.http://forums.pelicanparts.com/suppo...leys/smash.gif