2.7L cis lump or dual webers? Help!, Converting to dash six - need advice Options

[startsw/p]

Hey all. Who wants to donate their two cents worth on this... I am converting to six cyinder, and I have two engines.... a 2.2T with webers and a 2.7S with CIS.
I thought the CIS would be nice for everyday driving, and would be less troublesome overall, especially if the car sits for a long period of time. However, I heard there are some clearance issues on the rear firewall. Has anyone overcome this? Or would it be better to use the carb setup on the 2.7 and change the cams???? Either way I have pieces left over... and pieces to buy. Thanks. -Kris

[morgan_harwell]

There is a lengthy discussion of CIS 914s on the Pelican BBS. Look for thread "CIS on a 914/6".

If you "just have to have Webers" install the 2.2T(130HP?).
If you want about 40 more HP, and twice the gas milage install the 2.7L, CIS intact.

With gas at $2.50/gallon Webers don't make sense. A friend's 914/6 with 2.7L CIS engine, Webers installed, gets 165 miles/tank of gas. My 914/6 2.4L CIS, CIS installed, gets 300 miles/tank city, 425+ miles/tank highway.

Without changing the cams & pistons, Webers won't deliever more horsepower. Just poor gas miliage and c***py exhaust emissions. Something to consider if you street drive your 914 a lot like I do(12K-15K miles/year). The BAR refferre(sp) commented that my sixer CIS engine was one of the "cleanest" he had ever tested.

> IIRC, the 2.7 CIS motors were rated at 165 hp
Its reasonable to assume that by removing the 911's 2.7L restrictive exhaust (remember thermo reactors?) and using 914/6 tuned length headers, a few extra HP is to be had with just that one bolt on.