This thread is started to show HP improvements of the NA KA which most people find to lack as an overall performance engine. So I started this thread for people to understand what they can do to there NA KA. Please do not ruin this thread full of side comments just post your dyno, and mods, you may leave posts to help make improvements for fellow members of S-Chassis.com.

Heres mine to start.


Stock head, 240/248 cams, SCV's,Stock bottom end, Castrol GTX 10w-40,iridium spark plugs NGK, stock timing (20BTDC @ distributor), SAFC2, AEM intake,DC sports header, 2.5" exhaust, CATCO high flow, FAL electric fans and thermostatic switch, N60 MAF, fidanza aluminum flywheel, cheap $8 Paper intake filter (ebay), 95 Octane home brew (made of toulene and xylene, with 91octane pump gas)

 

My dyno

1994 Nissan Altima, with 1998 KA24DE
Stock heads (240/248 cams)
Stock Exhaust
Stock Cat
Hotshot CAI
JWT ECU
Stillen 4-1 Header
UR Underdrive crank Pulley SS
Oh, and Automatic transmission.

 

It would be nice to put a wideband on your engine Iceman, something just doesn't sit right with those low HP numbers, there lower than your torque numbers!!! Even with an auto tranny with those mods you could of easily made 145WHP.
I would say..
Do a compression test
Check your plugs
Check your A/F ratio as well.
Lets see what we can do to pick these numbers up!!!

 

Its the Stock Exhaust. There is a reason KA's gain 10whp peak and over 15whp at redline with an Exhaust. It was also done on a DD dyno, which is one of the lowest reading dyno's.

A/F was about 12.5 across the board if I remember. JWT only does one tune, so adding cams, and Exhaust, the car will more than likely lean out, and hopefully make more power.

BTW, I heard you were looking at PDM's tri-flow, but they only make those for SOHC motors. I went to ColtCams website, and looked myself.

 

PDM changed the name on all theer KA24de cams to tri-flow cams.
http://www.pdm-racing.com/products/cam_corner.html

Sounds more like the intake mani needs work. I've seen more gains from the maf, and intake system than any other part of the KA. When I installed my N60 my peak power went from 5800RPM, to installing the N60 with SAFC and getting a peak of 6500RPM.

 

Due tell. This N60 Maf, will it work with my JWT tune?

 

Nope you would have to get it retuned for the N60 MAF. Or you can go with an SAFC and do a 2in and 5out.
If you would like to send me a altima intake ,mani I can extrude one for you or you can do it yourself. I'm alkso under the assumption that the manifold runners are short, and small diameters.

 

I"ll take Pictues and show you how everything looks on the car.

 

i wonder if a 4-2-1 header would give you better results too, that is if it's even available for the altimas. i know a lot of transverse engines only have the 4-1 design available though.

 

4-2-1 is avilable. Trust me when I say its the stock exhaust. I also Dynoed on a Dyno Dynamics dyno, they do read lower than a dynojet.

 

same header header, same pulley, SRI Intake, Exhaust, Manual, and clutch/Flywheel.

This is an altima:


Guy with the same mods, minus the Ecu and pulley. Automatic


JWT ecu offers big gains..

 

Well I dont have a scaner.

I dyno'd in Oklahoma City at a shop called Abel.

I put down 164rwhp, and 175 torque. With the Air fuel falling off the charts! (untuned)

My mods are Short Ram intake, 50shot of nitrous, 3in cat back exhaust, no a/c, no emoisons, 248/248 cams, ngk plugs,electric fan, test pipe and blaster msd coil.

Stuff in the mail...
Header
walbro fuel pump
safc I
75 shot nitrous pills
sr injectors (not in the mail but soon)
AND GETTING TUNED!!! OMG haha.

We are aiming for 220rwhp on a 75. Which with a 75 in I would run 190rwhp..220 does not seem to hard. Considering I need alot more bolt ons...cant wait to get them on!

 

It would be nice to see the dyno since after all this thread is labeled, show your dyno.

 

Sounds like a nice little set-up

 

98 KA24DE w/ 5 spd

OBX Header, 3" catco, 80mm 5Zigen pro racer exhaust

Injen CAI, Accel 300+ wires, NGK VPowers.

248 (+2.5 adv) / 232 cams

compression is 175 across all 4, new O2's, new cap, rotor, fuel filter, Deutchwerks 270cc injectors.

Power is down and I don't know why.
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