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Engine Tech Technical discussion related to all relevant engines such as KA, SR, RB, CA, 2JZ , L24/26/28, VG, VQ, and LSx series.


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Old 06-12-2006, 07:16 AM   #31
ranisron
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most high comp pistons for the DE is the 10.5 to 1 ratio. However, the E pistons can bump the compression all the way to 11 to 1 (correct me if I am wrong).

10.5 to 1 will run on pump gas no problem, and getting your ECU retuned for high comp application is recommended.

anything above 11:1 is unsafe for the KA (I think).
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Old 06-12-2006, 02:06 PM   #32
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whats stock compression for a DE ... and where would i be able to get high comp pistons ... mostly i just find the low comp ones ...
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Old 06-12-2006, 05:03 PM   #33
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You can walk into any piston maker and they've probably already made high comp pistons for the DE.

If you're feeling good with your milling capabilites. You can pick up SOHC flat top pistons, mill in valve releifs and mill the piston to lower the compression to 11:1
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Old 06-15-2006, 11:27 PM   #34
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the only company i have seen advertise high compression ka pistons is supertech. they have a 10.5:1 set that goes for around $400.

as far as cams go, i have seen people use s13 sohc cams in the de is that beneficial in this case or is jwt the way to go. what is the difference in the lift/duration? as you can tell, i have more questions than answers but i am looking to build an na ka for reliability over turbo/power. i know above 200whp is pretty much impossible but i would like to see someone hit it.
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Old 06-20-2006, 07:53 PM   #35
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Quote:
Originally Posted by irritatedmax
the only company i have seen advertise high compression ka pistons is supertech. they have a 10.5:1 set that goes for around $400.

as far as cams go, i have seen people use s13 sohc cams in the de is that beneficial in this case or is jwt the way to go. what is the difference in the lift/duration? as you can tell, i have more questions than answers but i am looking to build an na ka for reliability over turbo/power. i know above 200whp is pretty much impossible but i would like to see someone hit it.

The SOHC cam doesnt fit the DE.
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Old 06-21-2006, 11:29 AM   #36
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Quote:
Originally Posted by irritatedmax
the only company i have seen advertise high compression ka pistons is supertech. they have a 10.5:1 set that goes for around $400.

as far as cams go, i have seen people use s13 sohc cams in the de is that beneficial in this case or is jwt the way to go. what is the difference in the lift/duration? as you can tell, i have more questions than answers but i am looking to build an na ka for reliability over turbo/power. i know above 200whp is pretty much impossible but i would like to see someone hit it.
When i'm done. I'll be over 200whp.
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Old 06-22-2006, 10:58 AM   #37
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Quote:
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When i'm done. I'll be over 200whp.
spread the love, what is your setup? i have a spare ka that i will be building soon and am thinking about just going back to stock for reliability/cost effective but please share your setup. my main concern is that it is my daily driver and i will be entering med school so i need reliability and money will probably get tighter after undergrad.
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Old 06-23-2006, 11:22 AM   #38
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You want reliability. I'd just suggest Bolt ones. JWT cams/valve train and call it good.

This is my daily driver but i can catch a ride into work whenever it goes down and i have a spare engine in the garage. I'm doing all this experimentally.
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Old 07-17-2006, 06:38 PM   #39
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Posted this a while back with no response. Figured I'd put it in here this time with hopes of better luck. I was going to do my lifters soon in my 89 KA and I figured I might as well gain some HP since they're gonna take the cam out anyway. Do have an idea what kinda HP I might get with this cam on a stock motor? I asked Summit and they said "there are to many variables to determine such as what header, what intake, what injectors you are using". I told them it was a STOCK motor. How can I make it any more clear!!!!!!!!!!!!
The only thing I have is a cone filter in place of airbox and a 2.5 exhaust.
Here is link, hope you can give a general idea.

http://store.summitracing.com/partde...5&autoview=sku
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Old 08-07-2006, 03:11 AM   #40
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So what are your n/a ka24 et's?

I did a [email protected] with my 5spd 91' (i/h/e). This was done with an open diff with 3yr old 215/35/18's. I spun the whole 1st gear and over revved 1st to 4th gear (7800rpm/no rev limit/I don't know why) and had a super crappy 2.599 60ft. With an lsd and better driving I should easily do high 14's on street tires.
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Old 08-07-2006, 12:15 PM   #41
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7800 rpms is kinda dangerous on the KA no?
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Old 08-07-2006, 02:14 PM   #42
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Quote:
Originally Posted by articdragon192
7800 rpms is kinda dangerous on the KA no?
I was waiting for the rev limiter to kick in, but it never did. On neutral the fuel cuts very smoothly at 7800 rpm (tried this only once), unlike my 2001 1.8 sentra which feels like the motor is gonna explode from the rev limiter, or my stock 240 tach is just broken.
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Old 08-07-2006, 03:29 PM   #43
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s13 Hrmm

Any information about the xcessive motorsports intake manifold set up? Good gains? Quality? Any one have it even? =]
Comparitively to ITB's which would yield more bang for the buck?
Thanks.
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Old 08-08-2006, 02:18 PM   #44
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As for the ITB's, i'd love to have them but there is no way i can afford or even set up a stand alone fuel management. Ive seen a member from NICO do ITB's but had a plenum in order to use the maf. Ive tried contacting him, but he never responded. Does any one know where I can buy the plenum or instructions as to how to make one??

-thx, George
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Old 08-21-2006, 04:56 PM   #45
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wats fellas newbie here I'm really interested in this itb setup for the kade but wat happened hows the progress goin? anything new?
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Old 09-06-2006, 09:35 PM   #46
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Quote:
Originally Posted by articdragon192
7800 rpms is kinda dangerous on the KA no?
doesn't make any sense either b/c the power curve decreases at higher RPMS.
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Old 09-07-2006, 09:30 PM   #47
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7800 is wayyyyyyyyyy too high for a KA... the stock limit is below 7K...

I don't know... KA is a great motor for making torque, and it's definitely not a high rev motor...
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Old 09-10-2006, 04:10 AM   #48
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So my tach must not be so accurate if the rev limiter should hit before 7000rpm. Also I don't feel any "ka falls flat on it's face after 6000rpm", my motor feels strong all the way to 6800rpm, maybe from the bolt-ons and shaved head.

Anyways, I still wish there was a bolt on centrifugal supercharger kit for the ka24de's. (at least 6psi)
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Old 10-02-2006, 06:40 PM   #49
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contact Thomas Knight at boosthead.com. He has made an S/C kit that is freakin' amazing. It uses the Eaton m62 blower. 175lb/tq at 2800 RPMS = teh sex
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Old 10-07-2006, 03:54 PM   #50
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question, What about building an air box around the ITB's and then run a hose to or bolt the MAF on to the side of the air box? Then all you would need is something like the BIKI Rom setup and some dyno time and I think that would be a pretty good setup.

2nd question, Is the STOCK TB on the KADE actually 42mm? that seems very small to me. it looks more like 60mm. If it is 42mm, Isn't the KA-E 60mm? I know that is good upgrade for the VG30ET
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Old 10-07-2006, 10:57 PM   #51
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a plenum for ITB's is a totally custom job. i had one made, but am no longer using it cause i went to standalone. the ITB's definately change the character of hte motor more then the peak power and teh sound is amazing.

PS: if anyone wants the plenum, email me
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Old 10-07-2006, 11:01 PM   #52
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i know this is probably a stupid question, but i have no idea. are ITB's gonna decrease the life or dependability of your engine? will they last? any info would be great!
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Old 10-11-2006, 02:21 PM   #53
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Maybe something like this would work. It's a fully built ka24de in a 72' 510 with mikuni side drafts and a t3/t4 turbo set up here on Saipan.

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Old 10-12-2006, 11:13 AM   #54
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Quote:
Originally Posted by HKSdrift3r
As for the ITB's, i'd love to have them but there is no way i can afford or even set up a stand alone fuel management. Ive seen a member from NICO do ITB's but had a plenum in order to use the maf. Ive tried contacting him, but he never responded. Does any one know where I can buy the plenum or instructions as to how to make one??

-thx, George
e bay
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Old 10-16-2006, 08:49 PM   #55
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Cams decide were the power is made. The KA falls flat on its face because of the mild Stock cams.
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Old 11-26-2006, 05:00 PM   #56
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i just got a 89 240. its lacking power of course, yet i dont want to lose the n/a reliabilty. plus its my first car and my rents dont want me to have a turbo (so no sr) because it will be too fast of a first car. so im thinking about getting a 16 valve ka and swapping it with my 12 valve. then ill do basic bolt ons and ill be done. hoe does this sound?
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Old 11-26-2006, 06:07 PM   #57
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lol i have fallin in love with n/a ka's. once i am closed to being finished and relize that my setup is still to slow and itll cost way to much money to make an na ka faster then ill boost. lol
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Old 12-01-2006, 06:25 PM   #58
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are there any final results for this yet?
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Old 12-10-2006, 07:55 PM   #59
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yea id kinda like to see dyno sheets and more info. where ya at bigvinnie?
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Old 12-18-2006, 01:07 PM   #60
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I'm running ona weaker engine atm. But A stand alone system and i'd be good for about an 8Krpm rev.

Cam's i have in car power band starts at 4K. VERY streetable.
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