Valve-train, porting, & cams?

Is there anyone that makes oversized valves for the KA?  Also, does anyone make valvesprings or can universal springs be used?  Who does the best porting?  Finally, what companies make cams for the KA24DE.  I know of Gude and PDM racing but is there anyone that makes cams that could rev to 7500rpm?  Any info will be appreciated.

come on guys!!

[sykikchimp]

You can also get Nismo cams which is just a set of 91' exhaust cams.  one re-pinned to fit the intake side.

JWT also makes some really nice cams from what I've heard.  Little more usable range of power than PDM's.

Haven't heard anything about the gude cams.  I have heard that Gude is an Excellent company though, that makes fine parts.  

I don't think that anyone makes oversized valves specifically for the KA, however I could be wrong.  I know there are aftermarket springs for it, but unfortunately I have never actually looked into this, so I'm not gonna be much help there either.

Does anyone know about the aftermarket springs for the KA?  I found Farrea stainless oversize valves, but so far i have only found valve springs for the SR20.

[wherezmytofu]

crower makes all those things...special order ofcourse they have resonable prices and the quality is good..check out crower.com and then call them....

p.s. i have never heard of universal valve springs <img src="http://www.zilvia.net/f/iB_html/non-cgi/emoticons/tounge.gif" border="0" valign="absmiddle" alt=':p'>

[nos240]

what exactly do you mean by repinned?

[wherezmytofu]

they kinda grid it so it fits and works as an intake cam

[nos240]

so it's pretty much a cam regrinds. like what pdm does.

[wherezmytofu]

seriously tho check out crower they're great....u can pick the specs u want...so u can make a crazy n/a cam(high duration, high lift) or a crazy turbo(lower duration, low overlap, high lift...not grind down) cam <img src="http://www.zilvia.net/f/iB_html/non-cgi/emoticons/tounge.gif" border="0" valign="absmiddle" alt=':p'>

[9591]

</span><table border="0" align="center" width="95%" cellpadding="3" cellspacing="1"><tr><td>Quote </td></tr><tr><td id="QUOTE">Quote: from nos240 on 9:24 pm on Feb. 12, 2002
so it's pretty much a cam regrinds. like what pdm does.
</td></tr></table><span id='postcolor'>

No. They don't do anything to the bumpy part of the camshaft. They just do whatever machine work is necessary to orient the cam gear for correct valve timing. You could actually make it work without repinning, but it'd be kinda hard to get it lined up right.

[drift freaq]

wherezmytofu writess...
crazy turbo(lower duration, low overlap, high lift...not grind down) cam <img src="http://www.zilvia.net/f/iB_html/non-cgi/emoticons/tounge.gif" border="0" valign="absmiddle" alt=':p'>

errr I think you got that backwards <img src="http://www.zilvia.net/f/iB_html/non-cgi/emoticons/smile.gif" border="0" valign="absmiddle" alt=':)'> turbo cams are long duration low lift &nbsp;not sure on the overlap. But the longer duration is to keep the valves open longer so you can pack a denser boost charge in your combustion chamber. NA's work with high lift cams because you draw more fuel in when the valves open deeper into the combustion chamber because it creates more vacuum i.e. sucks the air fuel mixture in . with a Turbo setup its not necssary because the Turbo is forcing the air fuel mixture in.
that should explain the difference between Turbo cams and NA cams .

[wherezmytofu]

nope i ment what i said <img src="http://www.zilvia.net/f/iB_html/non-cgi/emoticons/tounge.gif" border="0" valign="absmiddle" alt=':p'>.....check crower &quot;Turbo special design. Short duration = low overlap, high lift for increased performance. Requires &quot;

herez the deal higher duration makes for hp in higher rpms...thats why u want higher duration cams for n/a...but turbo is more mid range....thats why honda wise the gs-r cams r better for turboing then the type r cams...lift puts more air in the cylinders, you dont want the duration to be to long becuase the presure will gett messed up i dont want to get to deep in there

cliff notes:
1.tofu ment what he said
2. low duration + high lift = turbo cam
3. high duration + high lift = n/a cam

rember the theory behond out cylinder heads are not the same as the americans....it not quantity...if quality....meaning air velocity not just amount of air


(Edited by wherezmytofu at 9:21 pm on Feb. 13, 2002)

but what about the valvesprings guys?

[wherezmytofu]

crower makes valvesprings <img src="http://www.zilvia.net/f/iB_html/non-cgi/emoticons/tounge.gif" border="0" valign="absmiddle" alt=':p'>

[drift freaq]

Hey Tofu,
checked the Crower site this morning it is basically this your theory is correct for Honda engines and Crower agrees for Honda engines.
ON Nissan engines its the opposite like I was saying before.
Remember Tofu Nissans not like Honda's you should know that of all people given your history.
Now lets go eat K :biggrin:

[wherezmytofu]

ok u win..........now lets forget this and have a nice big chunk of bean curd <img src="http://www.zilvia.net/f/iB_html/non-cgi/emoticons/biggrin.gif" border="0" valign="absmiddle" alt=':D'>

[MrMigs]

.... I saw a can in the pantry today that said &quot;Beans Cake.&quot; LoL.