My £0.01
A 2180cc by nature will produce a lot of torque, so you can go slightly bigger on the cam and it will not make the engine feel gutless at low revs like a smaller engine, say a 1776cc. My only observation is that you said most of your driving is between 1.5-3k rpm’s and most likely will never pass 5k’s. Why do you need an engine with a powerband up to 6k’s? You will be leaving some of the so desirable low end torque on the table for a never to be used power at 6k rpm’s. Make the engine produce torque from idle to around 3.5k’s and power up to 5k’s. It does not mean that you cannot rev the engine to 6k, if you do, there will be only a slight drop in power which you might not even notice. On the other hand, building the engine taking in consideration YOUR driving style will make it a pleasure to drive that only YOU will experience.
Here is my suggestion:
92tw AA
82 4340 crank
5.4 i beams CB Unitech
Stock weight flywheel (og VW if possible) Kennedy stage 1 pp and kush lock disc
All rotating assembly balanced
Engle 110 with inexpensive and very strong 1.1 rockers with swivel foot, HD alu cut to lenght pushrods
Stock AA500 heads mildly ported, basically just a good blend, intake match and a good 3 angle valve job and chambers slightly enlarged to 60cc from 58cc , single HD springs
Compression of 8.75:1 and a deck of 1.4-1.5mm.
40 DRLA or IDF if not possible the Dell’s with a 30 venturi.
A good 1 1/2” 4x1 header
26mm oil pump with full flow
All stock tin including thermostate and flaps. External cooler might not be necessary. Install a temp and pressure gauge.
That should be a beast of a torquey engine and still will make decent power up to 5-5.k rpm’s and will be cheap ish to build.
Abel
