i used 2 have a 07 si and here is a dyno of the spacer on an 07 si. which has a similar engine set up. and it was done by an independent owner not a company. there is another one i can post but its a lot longer 2 copy past. so i will save the reading. i was skeptical of the spacer untill i seen this post and then i decided 2 get it and well the gein is dead on.
Quote:
Originally Posted by bizzybearfigiblue
These are SAE corrected numbers.... my car is stock other than the spacer we added on the second run....
w/o spacer: 190.9hp & 144.4tq
w spacer: 195.4hp & 146.0tq
an increase of 4.5 peak hp... midrange is an average of about 2hp but u can see for urself... enjoy dyno pix....
w/o spacer:
w spacer:
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yes it not that big of a gein but its a really cheap part. on my si the spacer, k & N drop in filter w/ a gutted stock airbox w/ lower resonater removed leaving the pipe down behind the fog light cover for a pickup, geined more than the F5 fujita intake i had. it didn't sound as cool but the car ran a lot better, no heatsoak, no hezitation, perfect throttle respons and a lot more low end then it had 2 begin with! granit the s2k has more low end than my si did i still could use more down there.