how far can you go with a 2.0l blacktop zetec?
assuming youve already got jenvey 45's, ecu,kent 2002 cams,verniers and forged pistons? whats the next step for 180+ bhp?

I would have thought that setup would have you close to that output.

Add some beadwork and time on the dyno to dial it all in and I'd say a job well done

You see raceline showing figures up to 240 bhp from a zetec on tb's. I wouldn't fancy the reliability though!

[Edited on 3/9/12 by StevieB]

Fit larger intake valves. Port the head. You will be surprised how small the exhaust ports are. Raise CR. Fit ARP bolts to rods, and flywheel. Rolling road. Suspension tuner.

A blacktop with ITBs should make 170-175, if you add cams to that you will be in the 185-190 region. Port & polished head with big valves, springs, cams, vernier pulleys, arp bolts + ITBs should make 205-210.

Anymore needs pocketed pistons or preferable HC pistons with forged rods with high lift cams. 240-250 can be done.

Don't forget lightweight flywheel and a very good exhaust will be required as well.



[Edited on 4/9/12 by jeffw]

Scholar built ours, 238 in their dyno cell, but the only part not modified was the block! Fine for full race but a real pain for road use and since my health means racing is now out we're changing to a supercharged lump. The price gets stupid, the last 30 bhp would have cost over £1500, thank god for sponsors!

The sweet spot for these engines is

Piper 285 cams (or similar) with vernier pulleys
ARP bolts
Jenvey ITB (or similar) with a decent ECU
decent exhaust

190-195BHP and a decent drive. Anything more becomes really expensive and isn't very nice on the road. Or you can Supercharge one like I did and end up with linear power which peaks at 320BHP.