What are some things that I can do??? - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

Uknowwh707 · 02-10-2007, 02:51 PM

What can I do to get more Rpm out of my KA24DE, somewhere around 7.5 to 8k Rpm. Is there a down fall to more Rpm, rough idle, loss of power during lower Rpm band?

punxva · 02-10-2007, 03:57 PM

the only real way to safely do this would be to upgrade your valve train, aka your valve springs and retainers, and get some cams

***S14DB*** · 02-10-2007, 04:00 PM

I/H/E then Cams. Need to increase the VE on the KA to allow it to breath at higher RPMs.

Uknowwh707 · 02-10-2007, 04:20 PM

Im in the process of rebuilding my engine, with Supertech pistons, valves, springs and retainers. But I didnt think that was gonna increase my rpm. Which cams are there to choose from or which do you recomend?

johngriff · 02-10-2007, 04:24 PM

Cams should be matched to your compression ratio and desired powerband.

Ballancing the engine is probably going to be your largest aid to high rpm redline.

The springs and retainers, allow the valve to "bounce back" faster and more resiliently to follow the profile of the cam, other wise, over said rpm, the valve will simply "stay down". (IE: Float).

Uknowwh707 · 02-10-2007, 04:26 PM

Basically my Setup will be Supertech built engine, Precision T03 Turbo, full 3inch exaust. But Cams is where Im stuck at...

Uknowwh707 · 02-10-2007, 04:29 PM

8.1 Compression Ratio and Im going for about 400-450 HP. The guy whos helping me rebuild my engine says if we do it all right we can get it at only 12-15 pounds of boost

johngriff · 02-10-2007, 04:29 PM

what are the trim specs of the turbo charger, or a link to the manufactures information page?

Uknowwh707 · 02-10-2007, 04:34 PM

the Garrett GT30R

http://www.precisionturbo.net/turboc...tegory_id=3023

johngriff · 02-10-2007, 04:37 PM

264degx11mm intake
272degx11mm exhaust

Do they make this for DOHC KA? Plx correct me if not.

Uknowwh707 · 02-10-2007, 04:38 PM

those specs you mean?

Uknowwh707 · 02-10-2007, 04:42 PM

the only ones I've seen are JWT's and the specs are 390" LIFT / 275 DEG. DUR.

johngriff · 02-10-2007, 04:43 PM

IDK about the lift figure, because i only go off of millimeters. That cam does sound good for the Exhaust.

I think a 270ish cam on the intake might be too aggressive and really hurt your spool times.

btw, if that is .39inch lift, that seems a little low, for that high a duration cam. But for the most part i only operate in SR20 Candy land, so i have no clue on cam profiles and choices for the KA.

Uknowwh707 · 02-10-2007, 04:43 PM

by the way, whats a good website to order parts that wont assume Im getting performance parts for an SR?

johngriff · 02-10-2007, 04:46 PM

Each part should state outright that it is for a KA.

There is a forum member that is pretty good with KA builds here, his name is RUSS and goes by R240NA (screen name), get in touch with him.

nissanberto · 02-10-2007, 04:46 PM

go to turbo240.com and check their cams out.... and.or jimwolftechnology.com those are my two main sources of ka-t parts.

Have you done anything to the bottom end?? like lighter crankshaft, etc... that helps with acceleration,, and idk about going for higher revs, thats why ppl switch to sr's.. i would just recommend staying under 7500.

johngriff · 02-10-2007, 04:50 PM

Found NO cams on turbo240 and only 1 cam on JWT. Is there really NO cams for the KA24DE?

nissanberto · 02-10-2007, 04:55 PM

hmmm, im guessing they took them off, or i have bad memory, lol. oh well, the ones on jim wolf are the only ones i know of now.

Uknowwh707 · 02-10-2007, 04:58 PM

AMS has Crower Stage 2 and 3

http://www.amsperformance.com/store/...Path=24_62_301

EchoOfSilence · 02-10-2007, 04:59 PM

PDM racing has cams

"PDM Stage II DOHC Turbo Cams – Now PDM offers a performance Turbo grind for those turboing your KA motor. Excellent profile for turbocharged KA street motor. These cams have higher lifts and durations with smooth idle good mid range, and wild upper end hp to redline. For those that want more from your torquey turbo KA. Good for hybrid T3/T4 turbos with boost levels up to 15-18 psi. Exhaust cams have been optimized and ground to help spool up the turbo faster, and reduce lag.

C.702.T STAGE II DOHC Turbo Cams – Intake 221 duration @.050”, .380 lift Exhaust 221 duration @.050” .380 lift

C.702.S Stage II Cams - Intake 221 duration @.050” .379 lift; (272 advertised duration), .380 lift; Exhaust 231 duration @ .050" lift, (278 advertised duration), .390 lift.
These cams are VERY streetable, with no injector or computer upgrades required, and pass the strictest emissions with proper tuning."

*NemeGuero* · 02-10-2007, 04:59 PM

PDM cams

EDIT: damn you echo

nissanberto · 02-10-2007, 05:00 PM

oh yea so turbo240.com does have camss.

turbo240====AMS

Uknowwh707 · 02-10-2007, 05:01 PM

but 6.5 rpm redline, chevelles can do that... I'd do 7.5 to be on the safe side too. Sr's are a lil lighter mainly because of the block, Iron - Aluminum

nissanberto · 02-10-2007, 05:02 PM

yea i am always under 7.5 cuz of my rev/launch limitor.

Uknowwh707 · 02-10-2007, 05:03 PM

whats the link to the PDM's???

johngriff · 02-10-2007, 05:05 PM

so, i would use the PDM 272 cam intake, and the JWT 275 Exhaust.

EchoOfSilence · 02-10-2007, 05:22 PM

Quote:

Originally Posted by johngriff

so, i would use the PDM 272 cam intake, and the JWT 275 Exhaust.

Can you explain why?

Also, why use PDM's NA cam instead of their turbo cam?

johngriff · 02-10-2007, 05:32 PM

In reguards to SR, have had much better luck using a staggered setup with mid map boost levels, and pump gas. So... since he said "street car" staggered seems to be the way to go.

The staggered cam setup promotes better spool, though it caps efficiency at higher boost, the cam overlap cools the exhaust, turbo alot too.

nissanberto · 02-10-2007, 05:05 PM

you should try the search bar, instead of having people do it for you lol.

http://www.pdm-racing.com/

EchoOfSilence · 02-10-2007, 05:53 PM

but don't you want the exhaust to be hot?

02-10-2007, 02:51 PM	#1
Uknowwh707 Leaky Injector Join Date: Dec 2006 Location: Napa Age: 39 Posts: 58 Trader Rating: (0) Feedback Score: 0 reviews	What are some things that I can do??? What can I do to get more Rpm out of my KA24DE, somewhere around 7.5 to 8k Rpm. Is there a down fall to more Rpm, rough idle, loss of power during lower Rpm band?

02-10-2007, 04:00 PM	#3
*S14DB* AFC #1 Join Date: Oct 2003 Location: 昨晩あなたのお母さんの家 Posts: 20,181 Trader Rating: (3) Feedback Score: 3 reviews	I/H/E then Cams. Need to increase the VE on the KA to allow it to breath at higher RPMs. __________________ Comments should be taken as Opinions not as Statements of Fact

02-10-2007, 04:24 PM	#5
johngriff Post Whore! Join Date: Jun 2004 Location: Long Beach, CA Posts: 4,103 Trader Rating: (4) Rides Gallery: johngriff Feedback Score: 4 reviews	Cams should be matched to your compression ratio and desired powerband. Ballancing the engine is probably going to be your largest aid to high rpm redline. The springs and retainers, allow the valve to "bounce back" faster and more resiliently to follow the profile of the cam, other wise, over said rpm, the valve will simply "stay down". (IE: Float). __________________ [email protected]

02-10-2007, 04:29 PM	#8
johngriff Post Whore! Join Date: Jun 2004 Location: Long Beach, CA Posts: 4,103 Trader Rating: (4) Rides Gallery: johngriff Feedback Score: 4 reviews	what are the trim specs of the turbo charger, or a link to the manufactures information page? __________________ [email protected]

02-10-2007, 04:37 PM	#10
johngriff Post Whore! Join Date: Jun 2004 Location: Long Beach, CA Posts: 4,103 Trader Rating: (4) Rides Gallery: johngriff Feedback Score: 4 reviews	264degx11mm intake 272degx11mm exhaust Do they make this for DOHC KA? Plx correct me if not. __________________ [email protected]

02-10-2007, 04:20 PM	#4
Uknowwh707 Leaky Injector Join Date: Dec 2006 Location: Napa Age: 39 Posts: 58 Trader Rating: (0) Feedback Score: 0 reviews	Im in the process of rebuilding my engine, with Supertech pistons, valves, springs and retainers. But I didnt think that was gonna increase my rpm. Which cams are there to choose from or which do you recomend?

02-10-2007, 04:26 PM	#6
Uknowwh707 Leaky Injector Join Date: Dec 2006 Location: Napa Age: 39 Posts: 58 Trader Rating: (0) Feedback Score: 0 reviews	Basically my Setup will be Supertech built engine, Precision T03 Turbo, full 3inch exaust. But Cams is where Im stuck at...

02-10-2007, 04:34 PM	#9
Uknowwh707 Leaky Injector Join Date: Dec 2006 Location: Napa Age: 39 Posts: 58 Trader Rating: (0) Feedback Score: 0 reviews	the Garrett GT30R http://www.precisionturbo.net/turboc...tegory_id=3023

02-10-2007, 04:38 PM	#11
Uknowwh707 Leaky Injector Join Date: Dec 2006 Location: Napa Age: 39 Posts: 58 Trader Rating: (0) Feedback Score: 0 reviews	those specs you mean?

02-10-2007, 04:42 PM	#12
Uknowwh707 Leaky Injector Join Date: Dec 2006 Location: Napa Age: 39 Posts: 58 Trader Rating: (0) Feedback Score: 0 reviews	the only ones I've seen are JWT's and the specs are 390" LIFT / 275 DEG. DUR.

02-10-2007, 04:43 PM	#13
johngriff Post Whore! Join Date: Jun 2004 Location: Long Beach, CA Posts: 4,103 Trader Rating: (4) Rides Gallery: johngriff Feedback Score: 4 reviews	IDK about the lift figure, because i only go off of millimeters. That cam does sound good for the Exhaust. I think a 270ish cam on the intake might be too aggressive and really hurt your spool times. btw, if that is .39inch lift, that seems a little low, for that high a duration cam. But for the most part i only operate in SR20 Candy land, so i have no clue on cam profiles and choices for the KA. __________________ [email protected]

02-10-2007, 04:46 PM	#15
johngriff Post Whore! Join Date: Jun 2004 Location: Long Beach, CA Posts: 4,103 Trader Rating: (4) Rides Gallery: johngriff Feedback Score: 4 reviews	Each part should state outright that it is for a KA. There is a forum member that is pretty good with KA builds here, his name is RUSS and goes by R240NA (screen name), get in touch with him. __________________ [email protected]

02-10-2007, 04:46 PM	#16
nissanberto Zilvia Member Join Date: Jan 2007 Location: lamar colorado Posts: 155 Trader Rating: (0) Feedback Score: 0 reviews	go to turbo240.com and check their cams out.... and.or jimwolftechnology.com those are my two main sources of ka-t parts. Have you done anything to the bottom end?? like lighter crankshaft, etc... that helps with acceleration,, and idk about going for higher revs, thats why ppl switch to sr's.. i would just recommend staying under 7500. __________________ my cars pink!

02-10-2007, 04:50 PM	#17
johngriff Post Whore! Join Date: Jun 2004 Location: Long Beach, CA Posts: 4,103 Trader Rating: (4) Rides Gallery: johngriff Feedback Score: 4 reviews	Found NO cams on turbo240 and only 1 cam on JWT. Is there really NO cams for the KA24DE? __________________ [email protected]

02-10-2007, 04:55 PM	#18
nissanberto Zilvia Member Join Date: Jan 2007 Location: lamar colorado Posts: 155 Trader Rating: (0) Feedback Score: 0 reviews	hmmm, im guessing they took them off, or i have bad memory, lol. oh well, the ones on jim wolf are the only ones i know of now. __________________ my cars pink!

02-10-2007, 04:58 PM	#19
Uknowwh707 Leaky Injector Join Date: Dec 2006 Location: Napa Age: 39 Posts: 58 Trader Rating: (0) Feedback Score: 0 reviews	AMS has Crower Stage 2 and 3 http://www.amsperformance.com/store/...Path=24_62_301

02-10-2007, 04:59 PM	#20
EchoOfSilence Nissanaholic! Join Date: Aug 2003 Location: Los Angeles/Berkeley, CA Posts: 2,238 Trader Rating: (1) Feedback Score: 1 reviews	PDM racing has cams "PDM Stage II DOHC Turbo Cams – Now PDM offers a performance Turbo grind for those turboing your KA motor. Excellent profile for turbocharged KA street motor. These cams have higher lifts and durations with smooth idle good mid range, and wild upper end hp to redline. For those that want more from your torquey turbo KA. Good for hybrid T3/T4 turbos with boost levels up to 15-18 psi. Exhaust cams have been optimized and ground to help spool up the turbo faster, and reduce lag. C.702.T STAGE II DOHC Turbo Cams – Intake 221 duration @.050”, .380 lift Exhaust 221 duration @.050” .380 lift C.702.S Stage II Cams - Intake 221 duration @.050” .379 lift; (272 advertised duration), .380 lift; Exhaust 231 duration @ .050" lift, (278 advertised duration), .390 lift. These cams are VERY streetable, with no injector or computer upgrades required, and pass the strictest emissions with proper tuning." __________________ Petition Nissan to Make the IDx on http://IDxClub.co !

02-10-2007, 04:59 PM	#21
NemeGuero No more nissan. Join Date: Jan 2003 Location: RAIN, Washington. Age: 40 Posts: 8,132 Trader Rating: (10) Rides Gallery: NemeGuero Feedback Score: 10 reviews	PDM cams EDIT: damn you echo __________________

02-10-2007, 05:00 PM	#22
nissanberto Zilvia Member Join Date: Jan 2007 Location: lamar colorado Posts: 155 Trader Rating: (0) Feedback Score: 0 reviews	oh yea so turbo240.com does have camss. turbo240====AMS __________________ my cars pink!

02-10-2007, 05:01 PM	#23
Uknowwh707 Leaky Injector Join Date: Dec 2006 Location: Napa Age: 39 Posts: 58 Trader Rating: (0) Feedback Score: 0 reviews	but 6.5 rpm redline, chevelles can do that... I'd do 7.5 to be on the safe side too. Sr's are a lil lighter mainly because of the block, Iron - Aluminum

02-10-2007, 05:02 PM	#24
nissanberto Zilvia Member Join Date: Jan 2007 Location: lamar colorado Posts: 155 Trader Rating: (0) Feedback Score: 0 reviews	yea i am always under 7.5 cuz of my rev/launch limitor. __________________ my cars pink!

02-10-2007, 05:03 PM	#25
Uknowwh707 Leaky Injector Join Date: Dec 2006 Location: Napa Age: 39 Posts: 58 Trader Rating: (0) Feedback Score: 0 reviews	whats the link to the PDM's???

02-10-2007, 05:05 PM	#26
johngriff Post Whore! Join Date: Jun 2004 Location: Long Beach, CA Posts: 4,103 Trader Rating: (4) Rides Gallery: johngriff Feedback Score: 4 reviews	so, i would use the PDM 272 cam intake, and the JWT 275 Exhaust. __________________ [email protected]

02-10-2007, 05:32 PM	#28
johngriff Post Whore! Join Date: Jun 2004 Location: Long Beach, CA Posts: 4,103 Trader Rating: (4) Rides Gallery: johngriff Feedback Score: 4 reviews	In reguards to SR, have had much better luck using a staggered setup with mid map boost levels, and pump gas. So... since he said "street car" staggered seems to be the way to go. The staggered cam setup promotes better spool, though it caps efficiency at higher boost, the cam overlap cools the exhaust, turbo alot too. __________________ [email protected]

02-10-2007, 05:53 PM	#30
EchoOfSilence Nissanaholic! Join Date: Aug 2003 Location: Los Angeles/Berkeley, CA Posts: 2,238 Trader Rating: (1) Feedback Score: 1 reviews	but don't you want the exhaust to be hot? __________________ Petition Nissan to Make the IDx on http://IDxClub.co !