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View Full Version : Weaksauce NA KA24DE Dyno


yoinkAzenki
03-16-2008, 04:10 PM
So I was at a local shop with some friends and decided to put my car on the dyno. I wasn't really expecting much but I did want a baseline dyno before I went turbo. According to most of the other NA KA dynos it shows that these motors like to breathe so I figured I might be around those numbers but not all cars are the same.
Dynapack
http://i32.photobucket.com/albums/d31/5fingadiscount/baseline.jpg
Slammed
http://i32.photobucket.com/albums/d31/5fingadiscount/slammed.jpg
Mod list:
KA24DE (stock rebuild ~ 1 yr ago)
Apexi Power Intake w/ Ebay piping
OBX Header
HKS 85mm Hi Power Exhaust
Compression is 200 on all cylinders
Timing is set at stock timing 20 BTDC
Oil is Mobil 1 Synthetic 10w-30
I could care less if these numbers are true or not but it does seem like it should be a little more and I want to make sure my motor is ok for boost. Whats weird is that the highest numbers were my first run. Then I did three more runs and each time I lost power. We didn't do any runs with the A/F ratio but I know I am running rich. Anyone got any ideas to why that happened or any suggestions to what I can do?

Phlip
03-16-2008, 04:45 PM
Those numbers seem lower than what I normally see for even stock KAs...
Checked compression yet?
How's your clutch?

sunnys14
03-16-2008, 07:34 PM
Could be your coolant temp sensor?

As your engine heats up more, the bad sensor could cause your ecu to dump more unnecessary fuel, causing a huge loss in power

yoinkAzenki
03-16-2008, 09:14 PM
Those numbers seem lower than what I normally see for even stock KAs...
Checked compression yet?
How's your clutch?
Compression is what I thought it was and I haven't checked but I will soon. Clutch was recently changed to a exedy oem clutch.
Could be your coolant temp sensor?

As your engine heats up more, the bad sensor could cause your ecu to dump more unnecessary fuel, causing a huge loss in power
Coolant temperature sensor seems fine. I don't overheat and the car was at normal operating temperature during the dyno.

yoinkAzenki
03-19-2008, 04:33 PM
ok i bought a compression tester but i have a problem. for some strange reason my spark plug wires wont come out. no matter how hard i pull it wont budge. any suggestions?

downshift_sideways
03-19-2008, 04:35 PM
ok i bought a compression tester but i have a problem. for some strange reason my spark plug wires wont come out. no matter how hard i pull it wont budge. any suggestions?

Yea; Pull harder. Get ready to buy some new ones.

johngriff
03-19-2008, 04:36 PM
Pull harder.

Moar better.

((sr)) kelly
03-19-2008, 04:38 PM
+1 for checking your compression

steve shadows
03-19-2008, 05:09 PM
eh coolant sensor is so so, I would be concerned with what your timing was set at.

What gasoline?

Run it advanced 2 degrees and run 91 octane. should rip it up.

Timeattack
03-19-2008, 05:12 PM
eh coolant sensor is so so, I would be concerned with what your timing was set at.

What gasoline?

Run it advanced 2 degrees and run 91 octane. should rip it up.

im gonna try this on mine

Nikeboy355
03-19-2008, 05:22 PM
I agree with Steve on the timing... Check that...

I'm curious to hear your compression numbers as well...

yoinkAzenki
03-19-2008, 05:28 PM
Yea; Pull harder. Get ready to buy some new ones.
ok ended up using pliers to get the wires out but still usable. so i just finished doing the compression check and the numbers were a little high. it was 200 on all cylinders. im guessing thats fine since it was the same on all cylinders.

eh coolant sensor is so so, I would be concerned with what your timing was set at.

What gasoline?

Run it advanced 2 degrees and run 91 octane. should rip it up.
not sure what my timing is set at but i will definitely check. i always run 91 octane so ill go ahead and advance the timing once i figure out what my timing is set at.

Anyone else have any ideas?

yoinkAzenki
03-19-2008, 06:40 PM
ok i checked the timing and its set at stock timing 20 BTDC. should i still advance the timing?

OfourTHREEfive
03-19-2008, 07:11 PM
If your all motor advance it a couple degrees, thats only if there is no plan to go boost.

dirtdiggler666
03-19-2008, 07:22 PM
but if you advance it you got to run 91 all the time

yoinkAzenki
03-19-2008, 08:23 PM
If your all motor advance it a couple degrees, thats only if there is no plan to go boost.
i do plan on boosting but that wont be for a while maybe later down the year. after i advance the timing what should i expect? car will run better? car wont run rich anymore?
but if you advance it you got to run 91 all the time
well i always run 91 so that wont be a problem. im guessing if i use a lower octane after advancing the timing my car will run like shit?

steve shadows
03-20-2008, 09:20 AM
but if you advance it you got to run 91 all the time

exactly :spank:

yoinkAzenki
03-20-2008, 04:44 PM
ok i advanced the timing a couple degrees but i didnt notice any major changes. car still runs and feels the same. what should i expect from the advanced timing?

ALEXTHESUS*PECT
03-20-2008, 04:48 PM
i would do the compression check before you do any harm to your motor!

yoinkAzenki
03-20-2008, 04:59 PM
i would do the compression check before you do any harm to your motor!

i did one already. the numbers were a little high... it was 200 but i thinks thats fine since it was 200 on all cylinders

turns101
03-20-2008, 05:31 PM
What are the CR #s supposed to be.

A little high should just mean its sealed solid. Especially with it at the same number on all 4. That is really legit. Technically if everything else is working correctly you should have more power with the higher CR.

ALso, the change in the dyno numbers is fairly normal. They usually arent all the same.

yoinkAzenki
03-20-2008, 09:01 PM
What are the CR #s supposed to be.

A little high should just mean its sealed solid. Especially with it at the same number on all 4. That is really legit. Technically if everything else is working correctly you should have more power with the higher CR.

ALso, the change in the dyno numbers is fairly normal. They usually arent all the same.

usually the compression is around 160-180 but its technically not bad if its over that because its the same on all cylinders like you said. so yea everything checks out ok from compression to timing. only problem i still have is that i am running rich, which i have been ever since the header install.

also would motor oil affect the dyno numbers? all of my friends honestly think my car is a lot faster than those numbers so maybe its the dyno?

WagDatto
03-20-2008, 09:13 PM
Motor oil could affect numbers, technically... Never a bad thing to drain the old, swap in a new filter and run some new oil through it. If you're overfilling the motor with oil, it'd cause stress on some internals, which is never good, and will make the car feel sluggish. Couldn't hurt.

But for any dyno, the numbers were pretty low. :-( I don't like seeing stock KA's score low numbers, cuz an SR swap into my 510 would be harder than you guys have it!

yoinkAzenki
03-20-2008, 10:36 PM
Motor oil could affect numbers, technically... Never a bad thing to drain the old, swap in a new filter and run some new oil through it. If you're overfilling the motor with oil, it'd cause stress on some internals, which is never good, and will make the car feel sluggish. Couldn't hurt.

But for any dyno, the numbers were pretty low. :-( I don't like seeing stock KA's score low numbers, cuz an SR swap into my 510 would be harder than you guys have it!

yea the dyno numbers are pretty low to what i expected but since everything checked out i definitely feel confident about going turbo now.

i still dont know why im running rich. its always bothered me because it smells horrible.

Rnz520
03-20-2008, 10:57 PM
haha my compression is 120-115-110-110, might be time for a rebuild...

ThE_BoMB
03-21-2008, 12:20 AM
on a stock ka24de with intake exhaust (stock header at the time.) underdrive pulley. I hit 154.5 rwhp. then 140rwhp after the engine heated up. If you hit 120 rwhp with those mods I would be like ummmmm somethings wrong lol. I wanna hit up the dyno soon.

godzillarb
03-21-2008, 12:22 AM
I agree about oil playing a factor, what weight are you using?

yoinkAzenki
03-21-2008, 10:29 AM
on a stock ka24de with intake exhaust (stock header at the time.) underdrive pulley. I hit 154.5 rwhp. then 140rwhp after the engine heated up. If you hit 120 rwhp with those mods I would be like ummmmm somethings wrong lol. I wanna hit up the dyno soon.
after i saw my dyno numbers i seriously thought there was something wrong with the motor. even the dyno guy had a s13 and said that mine was a lot slower than most stock 240s. but everything checks out ok with the motor so i have no idea whats wrong...
I agree about oil playing a factor, what weight are you using?
ever since the rebuild i have been using mobil 1 synthetic 10w-30 and a oem nissan oil filter

turns101
03-21-2008, 11:14 AM
Well what kind of numbers does this dude on this dyno see for a car like yours??
It may def be the dyno. They all read different and many use different correction factors.

ALso, if you are smeeling that rich or whatever you are smelling maybe you cat is shot?? If you are running one.

With those CR numbers being that consistent it wants a turbo ;)

Oh, and if motor oil is changing your numbers that much you are fucked :)

2ilvia
03-21-2008, 01:06 PM
maybe an o2 sensor.

are you running a cat? it could be clogged/plugged/restricted

yoinkAzenki
03-21-2008, 02:42 PM
Well what kind of numbers does this dude on this dyno see for a car like yours??
It may def be the dyno. They all read different and many use different correction factors.

ALso, if you are smeeling that rich or whatever you are smelling maybe you cat is shot?? If you are running one.

With those CR numbers being that consistent it wants a turbo ;)

Oh, and if motor oil is changing your numbers that much you are fucked :)
the guy at the dyno said most stock 240s put down 120ish whp and with my mods it should be around 140+whp. it might be the dyno because they were using the same dyno continuously on numerous cars that day because they had some kind of nissan/infinite event? i really doubt my motor oil will effect my numbers at least not a lot.
maybe an o2 sensor.

are you running a cat? it could be clogged/plugged/restricted
i already replaced my o2 sensor. im running no cat because i have an obx header.

yoinkAzenki
03-31-2008, 04:19 AM
ok dont really care about the dyno numbers anymore but i am still concerned about running rich. everything checks out fine and i dont even have backfire but i can still smell that im running. any more ideas?

bo2o
03-31-2008, 04:31 AM
if his cat were clogged your cr would b high.
do a vacuume test.
and snap wot. is if the vacuume drops then goes back up fast.
if it doesnt then your cat is crapped.
and change out o2 kould b your car is running bias lean.
or your coolent temp. but coolent temp would have problems at start up.

yoinkAzenki
03-31-2008, 11:22 AM
im running no cat
just replaced o2 sensor
coolant temp sensor is fine

98s14inaz
03-31-2008, 12:02 PM
...Coolant temperature sensor seems fine. I don't overheat and the car was at normal operating temperature during the dyno.

How did you verify this? You have two coolant sensors, one for the ecu and one for your gauge. When the ecu coolant temp sensor goes bad you get rich conditions that effect your power.

yoinkAzenki
03-31-2008, 01:22 PM
How did you verify this? You have two coolant sensors, one for the ecu and one for your gauge. When the ecu coolant temp sensor goes bad you get rich conditions that effect your power.

i checked the sensor for the ecu. im pretty sure its the the one with the red plug on the intake manifold where the upper radiator hose connects and the sensor next to it is the one for the guage. i took out the sensor and it looks fine but to be on the safe side i replaced it.

yoinkAzenki
04-04-2008, 01:30 AM
i replaced my o2 sensor recently and i think it went bad again. when i took out the old one it was a orange/red color so i figured it was gone. i still have that rich smell so i checked the new o2 sensor and its the same color as my old one. anyone know why it went bad or why its that color?