general engine advice

[Adrian3]

i'm looking to fit a type 4 into a 912, it would be injected but purely for normal road use with the accent on torque and longevity. Must i start with a 2 litre Porsche unit or, with the plethora of aftermarket parts for these engines, would a 1.7 Porsche unit be just as good a start, bearing in mind that crank, p's and c's would all be renewed. The 2l Porsche heads i know have repositioned plug for better combustion, but then again, the 1.7 heads with smaller ports will give more torque low down. Any thoughts gratefully received

[Mr Pharmacist]

There's a fair bit you can do with these engines - many options and combinations to look into.

Iirc a 1.7 can easily be made into a 1.9-ish with new p&c's if you go for 96mm pistons and still use the original FI.

Theres a whole thread on heads here - 1.7 heads are considered good reliable parts

http://www.shoptalkforums.com/viewtopic.php?t=63224

[Dean.s]

With the 1911? P&c's you will need to get the 1.7 head honed to fit the bigger cylinder. i'm delving into my 1.7 now with a view to deciding my build options.

[Bruce M]

That's a big topic.

You can get a lot of bang for buck out of a type4 & they are strong but you can also spend lots of cash if you want to go crazy.

[jackstowers]

1.8 heads fit straight onto the 1911cc barrels without machining

[Adrian3]

thanks gents, good thread on 1.7 heads....i guess, if you went crazy, you'd end up using only the case

perhaps, a good bottom is where it starts.....c/weighted, nitrided 74mm crank must be essential, eh?