Originally Posted by Anoth3r Hobo
I have the 1.4, 95bhp MiTo and absolutely love the car. I just want more power from it. I can't afford to upgrade to anything faster but I've got the money to do it up. I'm wondering if anyone can give any suggestions as to how to make it have more bhopal and torque while the dynamic settin will remain useable?
I've tried a few things with a 1.4 on a 500 and after having a quick look on line there does not appear to be much in the way of performance parts for the MiTo 95bhp.
£41 (4 x £10.18). Change the sparkplugs to Denso Iridium tough VXU22. If these don't give any extra power (would expect 1-2bhp) they claim to improve mpg by 5%. Gap that these come with is 0.8mm - you have to widen the gap very carefully
(done with a pliers) to 1.0mm to match the standard fit NGKs.
Sparkplugs UK NGK Champion Denso Sparkplug, Glowplug and Lambda Sensors
£29. K & N Air filter. Cotton gauze is the best filter for 'performance'. Does not filter as good as paper or a 'dirty' ITG foam filter. Expect 1-2bhp. Check ebay should include free P&P.
£150 - £50 (Homemade). GSR induction kit. Very difficult to get (Pete at CPH). It is possible to make your own on the same design as the GSR. Check out torqueitalia.net under 'GSR Induction'. Expect 5-7bhp. Note that if you are going though deep 'puddles' it's advised to take it off. IMHO the best modification but you would need to inform your insurance co. (very obvious modification).
GSR induction kit !
£110. Pipercross do a custom made CAI one for the 500. Can't see any reason what it would not fit on a MiTo. I bought this for a 500 and liked the induction noise it gave. Very little if any bhp improvement and concerned that the filter was not doing it's job since it was not of the same quality as the ITG cone filter which can be bought separately.
£800-900. Port & Polish. LAD Motorsport did this along with a Supersprint & then a Janspeed performance manifold on a 1.4 500 and they claimed to get the car up to 130bhp. Common modification in the US but very difficult to get a guy who knows how to do it in the UK/Ireland. Expect that the head work along with a skim to raise compression would give around 10-15bhp.
Larton Engine Developments Ltd-Home
Auto Italia Magazine - Shops
Hotter Cam. Don't know much about this. One would opt for the Port & Polish OR the hotter cam but NOT both. Reckon around £500. Not too sure of the bhp but it would affect the 'low down'.
Performance manifold. The CAT in the 1368cc engine is in the manifold and restricts power. Supersprint & Janspeed do a performance manifold and the Sports Cat 100cell or 200cell is placed after the manifold - you can buy a 'generic' one to keep costs down. Better bhp mid-range. Expect around 5bhp. May involve a re-map. Did not see a performance manifold listed for the MiTo so it might
be different to the 500. Supposedly increases mpg.
c.£85. Replace the centre silencer with a custom made straight through exhaust along these lines (Guess 1-3 bhp) ....
Ragazzon Stainless Steel Centre Pipe without Silencer Group N
Expect more noise in the car on the motorway.
Re-map. I don't know if the ECU on the MiTo is locked. It is locked on the 100HP but it isn't on the 500. Some have made claims on getting gains on re-mapping but I'm dubious unless the breathing or the 'exhaust' or both has been done. One guy with a 500 1.4 got around 12bhp with a GSR & a re-map.
On a separate note I would be dubious of the benefits of paying extra for higher octane fuel on a NA engine. The only MiTo that benefits from higher octane is the 155TB or a re-mapped Multi-air.
As pointed out by previous posters it's hard to justify spending money on a NA engine if you can put it into upgrading to a Turbo charged model like the 155TB model with the Brembos & a 6 speed.