NA KA24DE motors love to breathe!... My stock motor dyno... PICS!...

[Nikeboy355]

pic below



Took my car to the dyno today... Here are the mods...

Rebuilt S14 KA24DE
eBay intake
Greddy 80mm downpipe
Buddyclub Spec 2 80mm exhaust
80mm testpipe

That's it...

155.0 WHP
155.9 WTQ

Here is a graph comparing this KA24DE with my old SOHC KA24E motor...



and here is graph comparing with the silencer in and with it out...



So it looks like KAs like to breathe... No power losses anywhere!... 11 HP gain and no loss in torque... An improvement on both powerbands...

I think this is consistent with all the NA KA graphs that we have seen recently... These motors aren't bad at all!... A usable powerband from 3500-6000 RPM... Playing with gearing could really yield a lot of improvement at the track...

A while ago I remember a guy, Alex Chang, who moderated on another forum and personally tracked an S13 with a stock KA... He did a similar experiment where he wanted to see if the "loss in torque because the exhaust is too big" theory was real... In his case, he noticed the same thing... The KA likes big exhausts and there was no losses anywhere... Here is his graph from a couple years ago...

His mod list was:
S13 KA24DE
AEM cold air intake
JWT ECU
PDM testpipe 2.25"
5Zigen Pro Racer 80mm exhaust



Alex also competed in Formula D as well as plenty of road course events all over California...



And then there is Derek's graph that I like to compare against... Another heavy breathing NA KA... I like looking at the ITBs versus the Omega intake manifold...

The blue graph is with the ITBs and the red graph is with the Omega Motive intake manifold... Big difference just by changing the manifolds!...




Videos coming...