Author Topic: ultimate ka24e cam thread  (Read 8342 times)

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Offline noss

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ultimate ka24e cam thread
« on: Feb 19, 2013, 02:52PM »
from http://www.240sxforums.com/forums/ka24de-ka24e/131098-ultimate-ka24e-cam-thread.html

take the specs of the cam you want and have it ground locally. strongly recommend using wade cams and using a billet.

Quote
Ultimate KA24E Cam Thread
KA24E cam list w/ specs of each cam:

Stock 240sx:

Duration:
Intake - 240
Exhaust - 248

Lift:
Intake - .409in (10.38 mm)
Exhaust - .409in (10.38 mm)

LSA: 114.5*


___________________________


Stock KA24E Pick up:

Duration:
Intake - 232
Exhaust -232

Lift:
Intake - .381in (9.7mm)
Exhaust - .381in (9.7mm)

LSA: 114.5*

____________________________


O&J Stage 1 Hydraulic Cam:

Duration:
Intake - 266
Exhaust -266

Lift:
Intake - .434in (11.04mm)
Exhaust - .434in (11.04mm)

LSA: (All O&J cams are between 109-110 LSA. I never got a definite answer from the owner)

Price: $175 plus an additional $75 without a core

Website: O&J Performance*::*Engine*::*KA24E/DE Camshafts*::*KA24E Camshaft


_____________________________

O&J Stage 2 Hydraulic Cam:

Duration:
Intake - 270
Exhaust -270

Lift:
Intake - .444in (11.3mm)
Exhaust - .444in (11.3mm)

LSA: (All O&J cams are between 109-110 LSA. I never got a definite answer from the owner)

Price: $175 plus an additional $75 without a core

Website: O&J Performance*::*Engine*::*KA24E/DE Camshafts*::*KA24E Camshaft
_____________________________ _

O&J Stage 1 Mechanical Cam:

Duration:
Intake - 280
Exhaust -280

Lift:
Intake - .479in (12.19mm)
Exhaust - .484in (12.31mm)

LSA: (All O&J cams are between 109-110 LSA. I never got a definite answer from the owner)

Price: $175 plus an additional $75 without a core

Website: O&J Performance*::*Engine*::*KA24E/DE Camshafts*::*KA24E Camshaft Mech Lifters

_____________________________ __

O&J Stage 2 Mechanical Cam:

Duration:
Intake - 290
Exhaust -290

Lift:
Intake - .489in (12.44mm)
Exhaust - .494in (12.57mm)

LSA: (All O&J cams are between 109-110 LSA. I never got a definite answer from the owner)


Price: $175 plus an additional $75 without a core

Website: O&J Performance*::*Engine*::*KA24E/DE Camshafts*::*KA24E Camshaft Mech Lifters

_____________________________ __

O&J Stage 3 Mechanical Cam:

Duration:
Intake - 300
Exhaust -300

Lift:
Intake - .500in (12.7mm)
Exhaust - .504in (12.82mm)

LSA: (All O&J cams are between 109-110 LSA. I never got a definite answer from the owner)


Price: $175 plus an additional $75 without a core

Website: O&J Performance*::*Engine*::*KA24E/DE Camshafts*::*KA24E Camshaft Mech Lifters
_____________________________ ___


Nismo R4 Cam:

Duration:
Intake - 270
Exhaust -270

Lift:
Intake - .401in (10.2mm)
Exhaust - .401in (10.2mm)

LSA: ???

Price: $317.50

Website: Nismoparts.com - Your #1 Source for OEM Parts and Accessories

_____________________________ ___


Nismo R5 Cam:

Duration:
Intake - 288
Exhaust -292

Lift:
Intake - .550in (13.97mm)
Exhaust - .562in (14.3mm)

LSA: ???

Price: $317.50

Website: Nismoparts.com - Your #1 Source for OEM Parts and Accessories
_____________________________ __


Nismo R6 Cam:

Duration:
Intake - 248
Exhaust -256

Lift:
Intake - .421n (10.7mm)
Exhaust - .421in (10.7mm)

LSA: ???

Price: $317.50

Website: Nismoparts.com - Your #1 Source for OEM Parts and Accessories
_____________________________ __

Colt C.879 Cam:

Duration:
Intake - 280
Exhaust -290

Lift:
Intake - .404in (10.28mm)
Exhaust - .408in (10.38mm)

LSA: ???

Price: $???

Website: Colt Cams - Camshaft Profiles
_____________________________ _

PDM Mild Performance:

Duration:
Intake - 260
Exhaust -268

Lift:
Intake - .424in (10.79mm)
Exhaust - .440in (11.2mm)

LSA: ???

Price:
US: $254.76 + $250 core charge
CAN: $280 + $250 core charge

Website: PDM Racing - Cam Corner
_____________________________ __

PDM Race Cam:

Duration:
Intake - 300
Exhaust -300

Lift:
Intake - .505in (12.85mm)
Exhaust - .505in (12.85mm)

LSA: ???

Price:
US: $428.57 + $250 core charge
CAN: $473 + $250 core charge

Website: PDM Racing - Cam Corner

_____________________________ __

PDM Strong Performer:

Duration:
Intake - 268
Exhaust -272

Lift:
Intake - .424in (10.79mm)
Exhaust - .440in (11.2mm)

LSA: ???

Price:
US: $351.90 + $250 core charge
CAN: $382 + $250 core charge

Website: PDM Racing - Cam Corner

_____________________________ ___

JWT (Jim Wolf Technology):

Duration:
Intake - 248
Exhaust -256

Lift:
Intake - .422in (10.71mm)
Exhaust - .422in (10.71mm)

LSA: ???

Price: $375

Website: Jim Wolf Technology website

_____________________________ _________

Blank un-ground billit KA24E cam:

All lobes are un-ground.

Price: $190.50

Website: Nismoparts.com - Your #1 Source for OEM Parts and Accessories
_____________________________ ___________



Only a start. I'll post more info later on head specs, flow cfm, runner length etc. If you know the LSA's or know of any other cams feel free to post them.

Engine specs and random info:

Ignition timing: 15* Btdc
Stock thermostat temp: 170*F (76.6c)
Rocker arm ratio: 1.422:1
Intake manifold runner length: (head to TB flange) = 10.236in (260mm)
Throttle body CFM: = 458cfm
Throttle body diameter: = 2.362in (60mm)
Intake valve diameter: = 1.34in (34.1mm)
Exhaust valve diameter: = 1.618in (41.1mm)
Head port length: = 1.57in (40mm) Intake and Exhaust

Rod/Stroke ratio: 1.719
Bore/Stroke ratio: 0.927
Rod length: 6.496in (165mm)
Piston pin height: 1.338 inches (34.0mm)
Piston dish: -2.8cc's
Piston pin diameter: .826inch (21mm)
Cylinder volume: 597.3cc
Combustion chamber volume: 65cc
Head gasket thickness: (crushed) .040in (1.0mm)
Valve angle: 45* Intake and exhaust


Stock Head flow numbers: (Since MyHomePage doesn't exist anymore)

Intake: 28" Water pressure
.1 ----- 79cfm
.15 --- 119.3cfm
.2 -----145.3cfm
.25 --- 172.7cfm
.3 ----- 193.1cfm
.4 ----- 206cfm
.5 ----- 205.8cfm
.6 ----- 203cfm

Exhaust: 28" Water pressure
.1 ----- 54.9cfm
.15 --- 70.4cfm
.2 ----- 85.4cfm
.25 ---- 99.9cfm
.3 ----- 113.3cfm
.4 ----- 137.1cfm
.5 ----- 147cfm
.6 ----- 145.9cfm

Ignition break points: Info was taken from "Rom Editor" using a stock 1989 ignition map.

750rpm = 15* Btdc
1,200rpm = 20* Btdc
2,400rpm = 24* Btdc
3,500rpm = 22* Btdc
4,000rpm = 20* Btdc
4,700rpm = 23* Btdc
5,200rpm = 25* Btdc
5,500rpm - 6250rpm (rev limit) = 26* Btdc


http://polyfedelicio.us/imgs/ - free image hosting for whatever you like

Offline Nomad

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Re: ultimate ka24e cam thread
« Reply #1 on: Feb 20, 2013, 01:04PM »
Interesting info.
What is the significance of the "Ignition Break Points" table?

Offline SSS

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Re: ultimate ka24e cam thread
« Reply #2 on: Feb 20, 2013, 01:57PM »
They look like they are only for full load mate; not really of any great significance.

for everyone else's FYI, ignore the flow rates 0.5" and over, 99% of those cams don't exceed 0.45" of lift. personally, I would not recommend running a cam that results in 0.5" or more lift with standard rocker arms / lifters; simple fact is that the wear between the cam lobe and the rocker wiper pad will increase due to the high spring open pressures at those lifts.

large lift cams like that really need rolller type rockers to reduce cam lobe wear.

Offline SSS

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Re: ultimate ka24e cam thread
« Reply #3 on: Mar 15, 2013, 06:45AM »
Start a new thread for DE cams, we give no fucks for twin cam rubbish here.

Offline *ka24e*

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Re: ultimate ka24e cam thread
« Reply #4 on: Nov 5, 2014, 09:15PM »
I know this thread is dated, but I just wanted to clear up a few things.

Interesting info.
What is the significance of the "Ignition Break Points" table?

The breakpoints were used for Engine Analyzer Pro to mimic the ignition at WOT. More of a personal reference for me (or anyone using EAPro) than anything.

They look like they are only for full load mate; not really of any great significance.

for everyone else's FYI, ignore the flow rates 0.5" and over, 99% of those cams don't exceed 0.45" of lift. personally, I would not recommend running a cam that results in 0.5" or more lift with standard rocker arms / lifters; simple fact is that the wear between the cam lobe and the rocker wiper pad will increase due to the high spring open pressures at those lifts.

large lift cams like that really need roller type rockers to reduce cam lobe wear.

I'm not sure why you would ignore the flow rates above 0.5". The stock 240sx cam (0.409 lift) has a total valve lift (cam lift * rocker ratio = total valve lift) of  0.581".

0.409 * 1.422:1 = 0.581 Total valve lift.

As far as wear and roller rockers go, I'd be all for a pair of those. In the mean time tho, I'll stick to my tried and true Mobil 1 15w-50.

Offline SSS

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Re: ultimate ka24e cam thread
« Reply #5 on: Nov 6, 2014, 06:05AM »
I know this thread is dated, but I just wanted to clear up a few things.

The breakpoints were used for Engine Analyzer Pro to mimic the ignition at WOT. More of a personal reference for me (or anyone using EAPro) than anything.

I'm not sure why you would ignore the flow rates above 0.5". The stock 240sx cam (0.409 lift) has a total valve lift (cam lift * rocker ratio = total valve lift) of  0.581".

0.409 * 1.422:1 = 0.581 Total valve lift.

As far as wear and roller rockers go, I'd be all for a pair of those. In the mean time tho, I'll stick to my tried and true Mobil 1 15w-50.

Spot on - I assumed with those numbers that it was valve lift as measured at the valve, and not at the cam. I just checked the U12 FSM and it does mention the standard SOHC cam having 0.409" lift at the cam.