I got a call last night to come up to the dyno to help someone out. I went up there thinking it was going to be s300 but i got there and its a turbo k24 hatch with kpro. I've never messed with kpro before but it looks the exact same as s300 just with the added cam angle tables, which i left alone considering i have not looked into tuning the cam angles.

I'm a little worried about the car because they were at first dynoing without the boost tables setup (i set them up when i got there) and they used a basemap provided through hondata which was for a k24 with 440cc injectors. (i'll get into the injectors in a minute). This basemap was crap from my point of view. The 2d maps looked like a 10 year old had gone in there and just started pushing buttons, especially in the part throttle areas. I didnt get much time with the car but did the best i could with it in the time i was allotted.
Basically, no offense, the guys didnt know what they were doing.

Peak table timing was around 24-25* at 10psi. How does this fair with other peoples experience and what it can take? I pulled the plugs and the ground strap looked good so i know it can take 24-25* pretty easily.

my other question is how far do you guys typically rev a stock k24 to? I have a feeling that the clutch was slipping on this car. He had some aftermarket tachometer in there and when it got to 6k, the engine sounded like it was making 500whp and the tach would stick at 6500 and not go any higher even tho i was still on the gas. The rev limiter was set at 7200 rpm but the graph only shows it revving to about 6300-6400 which i felt was very awkward.

anyway, here is the graph:



its got more power in it, the vtec transition is very rich and it could run a little leaner in general across the whole WOT sector.
if anyone could answer my questions it would be greatly appreciated, sorry for being so long.

 

hows k-pro user interface?

 

exactly like s300

 

sweet so it should be fairly easy to use!

 

anyone?

 

The stock revlimit on a tsx is 7600 rpms (If memory serves correctly).

The only k24 setups I have tuned have been k24 blocks with k20 heads etc...

Tune the motor just like any other motor.
Reviewing the hondata kpro video documentation may help you understand the tuning process of kpro if you have not already grasped it.

 

ok thanks john. He gave me a copy of the Kpro manual that he printed out to read so i could get a better understanding of tuning the cam angles.

i still dont understand whats up with the RPM's tho. the dyno is getting the tach signal of the distributor so even if the clutch was slipping, it should read the same rpm right?

he didnt want to rev it any farther than 7000 and thats what i had it set in kpro and revved it until i ran into fuel cut. I have literally zero experience with the k series so i was completely relying on him to give me accurate information on how far to rev it.

 

What kind of dyno was being used ? Dynojet ?
If so, put the car on the street & see if the clutch slips...

 

yea, i am waiting on him to call me so i can street tune it.

 

What kind of K24 is it? A4? A2?

If you have a copy of the .kal, e-mail it to me, along with any datalogs if you have them.

- Derek

 

Those timing values seem *really* high to me.

Cam angle is *key* to making power with turbo Ks. A *rough* rule of thumb is peak cam angle at peak tq, retard closer to zero as redline approaches, more backpressure = more cam retard.

You'll generally have about 1/2 degree more ignition timing for every 10 degrees of cam advance, but this is NOT GUARANTEED. The shape of the ignition curve is going to shift somewhat, too.

I just got done tuning a K20A2 with a Full-Race kit and a 60-1 Monday. I had to ship it back to the customer with a 7200 RPM redline because it maxed out 550cc injectors on 10psi!!! (372whp) The *maximum* timing value at 183kpa in the map was 15.5 degrees.

After seeing that, I bought a 6 speed tranny today and am picking up a K24 block next week.

 

I built a K24/K20 with a GT35R 70A/R. 9.8:1 comp. 8.5psi 404whp and 343ftlb hence why I'm building one myself as well.

18degrees for me.
It's all about the cam timing...

 

cam angles?dont that have something to do with cam phasing?

 

The reasons the 2d maps look like a 10yr old did it is because of all the cam angles. You should lock in each angle tune it, then do another angle, etc etc etc. Start at 50 and work your way down to 0, then use your judgement on where to put the angles at to maximize the power.

I dont remember what my total timing was even though it was on aem. I made over 500whp at 13psi on a stock block, piston and rod k20 motor with a gt4088r.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 98vtec &raquo;</TD></TR><TR><TD CLASS="quote">
i still dont understand whats up with the RPM's tho. the dyno is getting the tach signal of the distributor so even if the clutch was slipping, it should read the same rpm right?
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We know you're in trouble if you think a k-series has a distributor!

If you dont lock the cam angle when tuning the fuel and timing maps, you'll have some REALLY screwed up tables.

Generally, most base maps provided suck.