CAr is under the 'knife', getting it back tommorow, sneak preview of mods..

[Exar-Kun]

For anyone whos following my car its in the shop again, getting a good bit of work done:

heres the stuff going in:

-JWT cam gears-JWT 262 duration cams-Ti valve retainers, Silica valve springs(ka24de.com)-370cc fuel injectors-walbro 255lph fuel pump-dyno tuning

before these mods i was at 162.5 rwhp and 164.8 lb/ft of torque(see post your ka powered ride for my dyno)

I'll be posting the new HP numbers and my take on these mods(and cost, of those considering a all-motor build) tommorow evening or md-afternoon..depending on how my day goes.

-chet

[cosmo]

Nice

[absolute]

so what all do you have on your car, or is it posted some where

[InsanityInc]

why aren't you just doing the work yourself? Also, why the bigger injectors? Your A:F looks fine.

[Exar-Kun]

I'm getting the larger injectors because they're currently running 20% overduty veruss stock, which is a bit much, also I'll need them if I never go to a low boost turbo setup.

in case anyones wondering, I would save my money on the cams. I only netted 3hp peak(...damn it)

BUT...and heres the nice part, you'll notice on my dyno chart before(see the sticky) the KA's power falls off fairly drastically after 5300 rpm, with the JWT cams it doesnt fall off nearly as bad. I netted between 8-16hp after 5600rpm, and the power keeps up strong until about 6800 (verus the drop at 5500, the a worse drop off at 6k undert stock cams)

I didnt lose any lower end hp, and the torque band is still vey strong.

also, witht he lighterweight valve train componenets and freer flowing cams, the car revvs much easier, and freely(especially in the upper RPMS) and..well..its just fun to run a KA out to 7k and still have the power to do it!

worth the nearly 1500 dollars in parts and labor?....I doubt it. but I love the much improved upper RPM power(which everyone knows is the KA's weak point) and the easier revving/cooler sounding KA.

cost breakdown:-Cams: 500-Cam gears: 140-Valve springs, etc: 320 -Walbro 255lph fuel pump: 105-370cc injectors: 100-1.5 hours of dyno turning: 180 dollars-Install of all the above: 700 dollars (YOU try putting in valve springs and retainers by yourself without the head off.....lol)

total cost: 2045 dollars....

now obviously you can save a bit by doing it yourself..me? I dont trust myself with engine internals...I'm a suspension guy.

-chet(dyno posted shortly)

[Exar-Kun]

the area of concern lies after 5200rpm...where the pwoerband still pulls almost flat(and did on another 3rd gear run until nearly 7k with minimal (6hp) drop off....this dyno is the fourth gear run..its hits the governor around 6400)

-chet

[NateDogg]

Nice work Chet. Looks like your a/f is near optimal for peak torque. I would be curious to see what timing you are pulling with the adjustment of the s=afc for the larger injectors. IE for 37% less MAF voltage, where would that put you on the ignition map?