Remapped CIS??

Mid 80s power increase was due to a redesign on the motor, changing from a 2-valve to 4-valve-per-cylinder head being the main modification

 

I've heard folks claim the euro 2Vi are faster than the US counterpart, and it's a result of the Bosch fuel distributor being different. Prob is the price of the part, and don't know anyone who's gone thru the exercise of making the change. If there is a real change, how much could it be?? I've seen a supercharger kit for the f/i cars that looks nice. If originality isn't a hang up.

 

True --- the Euro "i" is a little faster. But, there are other differences that contribute:

1) Euro cars weigh about 200lbs less
2) Fuel distributors & warmup regulators are different
3) ECU ignition mapping is different
4) Euro cars don't have all the emissions crap
5) Exhausts are different --- no cats on the Euro

All of these differences contribute to the performance increase on the Euro cars, but it's hard to say which one makes the biggest difference.

I can say that in my own experience with my own US-spec 2Vi, addressing only numbers 4 & 5 makes a substantial difference .

My car is "Euro-ized" with regard to numbers 1, 4, and 5 ---- and, it can keep up with any stock US-spec 4V out there!

 

The fuel distributors on US and Euro cars are the same until 1984 then the US car got a fuel distributor with lambda. You can tell this by checking to see if it has a frequency valve or not , or if it is cast iron ( black ), lambda or aluminum ( silver ), non lambda. Warm up Regulators, the Euro and US cars (non lambda) the only difference was most of the Euro cars had a dual heater element to slow down the leaning of the mixture in very cold climates like northern europe. The lambda cars had a Warm up Regulator that adjusts for altitude with no full throtle enrichment, this was done on these cars through the lambda system. If you want more power you need more air. I can make it fuel to 500hp on CIS, you have to find the air to support it.

Larry Fletcher
CIS Flow Tech Llc.
251-929-3771

 

You have a business servicing CIS distributors? Good to know.

 

The primary difference in HP between US and other markets was ignition timing, exhaust, compression and slightly different cam timing. Differences in the CIS had very little to do with it. The differences in ignition timing in QV motors between markets was substantial.