Zetec into MX5?
Discussion
MX-5 Lazza said:
Seen this Lazza? http://www.mx5nutz.com/forum/index.php?showtopic=2...Jays car up for sale. One of the finest MX5's in the country.
MonkeyBusiness said:
MX-5 Lazza said:
Seen this Lazza? http://www.mx5nutz.com/forum/index.php?showtopic=2...Jays car up for sale. One of the finest MX5's in the country.
The reason I'd posted Urns old for sale thread was just to point out that 170bhp was possible on an na tuned 1.6 MX5.
I'd love a Zetec MX-5 - I had a 2L Zetec in my kit-car and it produced loads of power and sounded absolutely amazing on 45s with an un-baffled exhaust.
Having rebuilt my 1.6 motor though I can't really see enough difference between the two (apart from capacity) to make it a worthwhile swap - I suppose the MX5 motor would run nicely on 40s or 45s also - they seem to be becoming more popular for Seven-type kit cars and they mostly use throttle bodies or carbs.
Having rebuilt my 1.6 motor though I can't really see enough difference between the two (apart from capacity) to make it a worthwhile swap - I suppose the MX5 motor would run nicely on 40s or 45s also - they seem to be becoming more popular for Seven-type kit cars and they mostly use throttle bodies or carbs.
Edited by anonymous-user on Monday 8th December 08:48
freerange7 said:
2.0 zetec black top with 40's and a nice exhaust should see 160bhp and a head job up to 225bhp.
How do I acheive this with a 1.6 MX5 engine?
What kind of head work gains 65bhp ???How do I acheive this with a 1.6 MX5 engine?
Thats more than many FI kits.
I'm calling BS on headwork alone.
I had a full race NA 2.4 Cosworth engine that reved to 9500 that made 270bhp but cost over £10k including a forged crank.
However a well set up MX5 turbo kit will definately make 220 and without being peaky and low torque.
Yes, it's forced induction.
Basically, if you na tune an engine you are playing with the shape of the torque & power curves. You can tune it to give more top end power but it will be at the expense of low & mid-range power. The higher the top end the lower the mid range. Also, torque is a calculated value from horse power (or is it the other way around?) so as you increase bhp you decrease torque.
What this means is that, in a straight-line thrash through the gears 200bhp na and 200bhp fi should be pretty much the same but in a real-world race or even just fast driving on the road where you aren't constantly full-throttle and thrashing the fi car will have bags more torque and will easily drive away from the na car.
Basically, if you na tune an engine you are playing with the shape of the torque & power curves. You can tune it to give more top end power but it will be at the expense of low & mid-range power. The higher the top end the lower the mid range. Also, torque is a calculated value from horse power (or is it the other way around?) so as you increase bhp you decrease torque.
What this means is that, in a straight-line thrash through the gears 200bhp na and 200bhp fi should be pretty much the same but in a real-world race or even just fast driving on the road where you aren't constantly full-throttle and thrashing the fi car will have bags more torque and will easily drive away from the na car.
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