TomPengelly

Hi, i have a mk2 fiesta. It has a silvertop 2.0l zetec, with ported and polished head, R1 bike carbs, 4 branch exhaust manifold, piper bp185 cams with vernier pulleys and megajolt ecu, with a diesel gearbox with rst lsd. Had it rolling roadrd at 193bhp.

The car also has a roll cage, cosworth 4x4 front brakes, spax lowering springs and shocks and adjustsble lower arms.

Im happy with the brakes, they are really good, but am going to change the suspension as its old and the shocks have had it i think. Can anyone reccomend any decent shocks and springs? And whats a good ride height drop? Its on 15" zetec s alloys

Also, what shall i do next fir more power?

Thanks in advance

Mk4 Rick

If you want big power I think the only way it could be done is forced induction

gjh

What size are the valves? Maybe time to fit bigger ones and even wilder cams to break the 200bhp barrier? Not sure if the bike carbs will fuel that though (no doubt someone on here will no better)

Mk4 Rick

The carbs might be ok if bigger jets are fitted.I think if he went for bigger valves the head would need machine work to accomadate them as well,meaning lots of expense lol

Karlos G

iTrader: (4)

If not FI then more head work and wilder cams as already said and perhaps proper throttle bodies (can be from a bike if your looking to save money) using injection for more accurate fuelling, a rich mixture (often the case when using carbs) will rob you of a few BHP.

SiZT

Change your gearbox to one that's not designed for an engine that tops out at 3,500rpm

gjh

Ye I know it won't be cheap, but he has already gone quite far naturally aspirated, could a bit of a hassle converting to forced induction (wrong cam profile, compression etc)

TomPengelly

cheers for the replies. yes I want to keep it naturally aspirated, already done a zetec turbo. as far as I know the valves are standard with uprated springs.

mabey bigger cams are next then, and mabey big valves, I shall look into it!

CrOwSoN15

ITB's with headwork and lairy cams are the only way you'll see any more! Bet it goes well as it is..

Oranoco

Dump the box off and fit one with more suitable ratios. That box will be doing you no favours at all and has no benefit over other boxes.

TomPengelly

Ok sweet, yeah it does go well. What gearbox would you reccomend?

Mk4 Rick

Im using a diesel ib5 on my mk4 fiesta.I went for this box because it was to hand lol and I heard there stronger.My mate had a 2litre blacktop in his mk2 with a 1.6 gearbox and it was insane.I think this will be be my route in November.I don't no what the ratios are though.

Mk4 Rick

Very true mate.

rsmark86

iTrader: (3)

change gearbox, rs1800 fiesta gearbox with the lsd or a s1 box and lsd, the car will pick up alot faster with better gearing and sprint alot better, hence making you think you have alot more power

the diesel gears are too long for a n/a zetec,

and direct too head thottle bodies, my personal favourite are AT power bodies, available from james goldstraw at grace engine developments at a good price