April 2009, a newly modified Natural Aspirated mod for HT81S model was done at Monster Sport workshop. I am very happy that there are still fans for this old Swift Sport and Japanese still willing to spend money to mod this car instead of changing to the new model.Since my Japanese language and understanding is still low, I need to relied on Google translate to do the translation and I got some picture of the HT81S that had been mod to the NX15 Step 1 level.
Enjoy the picture !
Original engine and plus minor mod before transforming to NX15 Step 1
Engine being dismantel for the modding process.
Resulted mod :-
I don't know how much the horsepower gain from this process, but at least it will gain to 130-140bhp for this kind of mod. If not, it will not worth the money around JPY 2,200,000 for the process. But I know the engine rev limit have extended to 7800 rpm and most probably is from the changing the valve springs and performance cam.
All these picture is taken from Monster Sport website at :-
Blog dated April 2009
http://blog.livedoor.jp/monster_edogawa/archives/2009-04.html
Sales website
http://www.monster-sport.com/shop/campaign/09/0413hachiroku/index.html
http://www.monster-sport.com/shop/campaign/09/0422hachiroku/index.html
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