[kav]

I meet many folks at various meets that have 2.7L engines in their Hotrod cars. I don’t know an awful lot about these motors but they seem to be getting more popular to rebuild with more power than stock.

So the 2.7L came in the base 911 form with 150hp?
911S was rated at 175hp?
911 Carrera again rated at 175hp?

What was the difference between these engines to get the HP variations? Did the extra HP come from compression and cams or something else? Were the heads all the same or did they have different port sizes? Stroke was 70.4mm on all? 90mm pistons on all? Was there various injector sizes between the variants on the CIS system?

What makes a 2.7 into a 2.8? 92mm P&C’s? Do you need to change out the heads?

What makes a stock 2.7L a RS spec 210hp? (expensive I imagine because of the MFI?)

These engines run hot so the head studs would pull from the Mag case? Valve stems had issues? If you plan on upgrading for more power you need to add case savers, oil bypass etc.

I’ve heard a great street engine is a 2.7L with 9.5:1 compression, E, Solex or S cams, Weber’s, SSI’s and a sport exhaust? What kind of HP would that combination put out? Can you start with any of the 2.7 variants or do you need to find a ‘S’ or ‘Carrera’?

Lots of folks were not running front mounted oil coolers, is that necessary or just more sensible?

I told you I had lots of questions!

Cheers,

-Kav