What are some things that I can do???

[Uknowwh707]

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]

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]

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

[Uknowwh707]

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]

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]

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

[Uknowwh707]

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]

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

[Uknowwh707]

the Garrett GT30R

http://www.precisionturbo.net/turbochargers-display.php?company_id=101795&category_id=3023

[johngriff]

264degx11mm intake
272degx11mm exhaust

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

[Uknowwh707]

those specs you mean?

[Uknowwh707]

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

[johngriff]

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]

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

[johngriff]

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]

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]

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

[nissanberto]

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]

AMS has Crower Stage 2 and 3

http://www.amsperformance.com/store/index.php?cPath=24_62_301

[EchoOfSilence]

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]

PDM cams

EDIT: damn you echo

[nissanberto]

oh yea so turbo240.com does have camss.

turbo240====AMS

[Uknowwh707]

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]

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

[Uknowwh707]

whats the link to the PDM's???

[johngriff]

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

[nissanberto]

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

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

[EchoOfSilence]

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]

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.

[EchoOfSilence]

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

[johngriff]

Nope, you want the exhaust theoretically as cold as you can make it. Allows for more timing advance.

[NemeGuero]

Nope, you want the exhaust theoretically as cold as you can make it. Allows for more timing advance.

except if you're turbo.
'cuz the temp of the exhaust gas.. drives the turbo

loosely speaking

[S14DB]

Hella loose...