Wiring a sohc into a 92

[19b]

What is needed to wire a sohc into a 92? Don't flame me, please, I have an actual need.

[masticatingcow]

SOHC ECU, engine harness, SOHC tachometer... at least. I'm pretty sure the trannies are the same, but you may need a 89-90 bellhousing (not sure).

But to ask the obvious... why do you want to put a less powerful, less efficient, older motor into your car? The DOHC engine makes about 15 more HP, gets better mileage, and is a more direct fit. Plus, it's a pretty easy motor to get a hold of. It was in production in the USDM 240sx and other Nissan cars between 91-98. I mean, right off the top of my head, I know at least ONE KA24DE that's looking for a new home.

Late-model KA24DEs, those that came in the S14, are also pretty easy to find. They aren't quite as straightforward as an S13 KA24DE, but they are pretty damn easy, nonetheless.

[19b]

Here's the deal, I'm in east central Il., I can't even find steel wheels in the yards around here. No 240s. My sohc is fresh, ran very well when I crashed my dirt car, oval dirt, it's great. My dohc has about 140,000 not very well cared for miles on it, has a miss that may be in the valves. Not cheap. I kept the sohc and what wheels were left round, not the harness, (mistake) the miss may be in the injectors. I hope. Plan C may have to be put in the sohc, hoping for a simple solution. Basically it's fresh, well built single that I have on a pallet, vs. $400-$500 shipping charges on a used dual,....I've raced them both, I'll take the single and lap the dual anyday. Although happily, I've won with both!!! No easy wire switches?

[masticatingcow]

No easy wire switches?

No. You need the SOHC harness and SOHC ECU, minimally. If you want to know how fast it's spinning, you need a SOHC tach. Then, if you want it to power the rear wheels, you'll need to figure out if the DOHC transmission mates up with not only the SOHC engine, but also the SOHC harness. I think it will, but don't take my word on it.

You say the engine has a problem, which you hope is an injector. Frankly, I wouldn't waste another minute with that SOHC engine if I were you. $400-500 shipped is WAY too expensive. You say you have a bad valve on your DOHC? How's the block? I know a guy who's parting out everything on his DOHC. I can probably get the head for you for cheap. I mean, then you don't even have to pull the engine!

I'm not trying to say your logic is flawed. Of course, if I were in a similar situation, I'd try and work something out. But then again, you've got a questionable SOHC at best, and a DOHC with a problem you've already identified. Having said that, I'd be in the market for a cheap fix on the DOHC. And as far as reliability goes with the DOHC KA, check out my sig... I bought it with 190K on the clock from a friend I know raced it, and I've NEVER had a problem. Those blocks are bulletproof, man. Think about it and if you're interested, e-mail me at [email protected].

[19b]

That's my problem, the single is NOT questionable, I saw the cross-hatches, it's strong and torquey.......and just laying there,, wonering why HE can't race. I'm guessing the problem is in the injector on the dual, she lit most of last season, and she lights a little more now. When I bought her, she could have had the original oil in her for all I knew, it looked it. I spent my money on a vlsd with a 4.4 gear, now I lost a cylinder...poop! Dirt racing, is drifting with 19 other guys at the same time. You find out who you can trust and who you can't, right away. When you're up front with guys you can trust,... man, that's a blast! Win or not!

[nelson8708]

Yes, another one who doesnt hate the sohc,that makes three of us including my friend. I am boosting my single in a few months. Anyways it is your lucky day. If you are for sure about doing the swap there is a ka24e (sohc) wiring harness on ebay. Go here

http://cgi.ebay.com/ebaymotors...=WDVW

Hope this helped.

P.S. I also heard that the transmission is compatable if you have the (older Bell housing) right housing.

[19b]

Thanks Nelson, we're going to dig into the dual today. Injectors, compression, leak down....see where we stand. I see you're at Indy, any 240s in the yards over there? I could use some wheels, 7-spokes would be nice, as long as they're round, but steelies will work. I race mostly just across the line from you at Danville, Il. I go to see Drs over there once in a while. Do you know where the good yards are? Would love some direction.

[19b]

Just in case anyone cares, it turned out to be a faulty plug wire to #4. They were new 60 miles ago, the ohm meter was all over the place. Trim the 110 octane a little more, and we are good to go!!! Will report back Monday morning on results! Wish me luck!!

[nelson8708]

Took me three months of hard looking for my 240 and in the end i had to go to kentucky to get it and one week after i got it the throw out bearing went out.(Son of a *****) Any ways the only place in indiana would be a place called the brick yard. Its a junk yard that only has imports. That would be the first place i would look.

[19b]

Thanks Nelson, I'm assuming that it's somewhere in the western part? If you have the phone number, that would save me some time. ThanksI love race day!!

[19b]

OK, Whether anybody cares or not, I said I would report on results. Drew well, outside row 1 in heat one, high side is fast if in front, I had set sail for 3 of 6 laps, had 5-6 car length lead, caution..... went to re-start, missed third gear, went into 5th gear,...bad... sufice it to say driver error,, finished 9th ......... Feature time.. started 17th... went low.... bounced off rev limiter... should've went high with 4-5 laps to go...could've won...... but finished a respectable 4th. not bad. I now have a car that can win any night...from any starting position.Hope someone reads this...it is a blast!!!

[masticatingcow]

Just in case anyone cares, it turned out to be a faulty plug wire to #4. They were new 60 miles ago, the ohm meter was all over the place. Trim the 110 octane a little more, and we are good to go!!! Will report back Monday morning on results! Wish me luck!!

Is this on your DOHC?

[19b]

Yes mc, bad plug wire on the DOHC. A valve or two were carboned up for a little while, but by race time she was singing again. Yes we can run 110 in them, but straight 110 is a waste, but it sure smells nice!! Question, can the rev limiter be raised? I think you can remove it all together, am I wrong? What rpm are they actually set at? How stupid would it be to raise it? I don't want to remove it, it does serve a purpose. All opinions welcome.

[nelson8708]

19 BIf you still want the number to the brick yard i will try to get it tonight. I was wondering since you got the dohc running, what are you going to do with the sohc. I am looking for a second motor to rebuild and turbo. If you want to sell let me know. I will get you that number later to night.

P.S.

Weather it is racing on the track or on the street you get the same adrinaline(yes i know i cant spell) rush but when on the track you dont have to look in your rear view mirror and listen to your radar detector.

[nelson8708]

Just go to this site, it has their adress, email, and phone number.

http://www.autosalvageyards.com/brickyard/

Let me know about that motor. I have another guy in indiana who want me to give him a price on his motor, but i would rather have yours since you rebuilt it. I would be willing to pick it up.

[masticatingcow]

Question, can the rev limiter be raised? I think you can remove it all together, am I wrong? What rpm are they actually set at? How stupid would it be to raise it? I don't want to remove it, it does serve a purpose. All opinions welcome.

Well, for starters, the KA has serious harmonics problems right around 7000 RPM. While you could balance the crankshaft and raise the rev limiter, you'll still have to deal with the KA's abnormally long 96mm stroke. At 7000 RPM, the piston speeds are faster than 3800ft/min. Assuming 4000ft/min is "safe," how fast do you really want to go? Moreover, the stock KA24DE starts running out of breath after about 6000 RPM. If you were to redesign the intake manifold, drop in some wild cams, and port and polish the head, you might see some power open up past 6500 RPM.

So, yes, it's feasible, but you're talking about a balanced crankshaft, lighter and forged engine internals, crazy cams, forged/titanium everything on the valvetrain, port and polish job, and a redesigned intake manifold, possibly even ITBs. Guys have installed ITBs on their KAs, and frankly, it damn impressive. Check out the NA KA forums and see what some of those folks have been able to pull off.

Hope this helps.

[19b]

Nelson, I will consider selling you my single. Are you in a hurry? What's it worth?Cow,..Thanks for the info. We will leave it alone, I realize running it up to the occasional 6500 is better if I wish to race this same engine next year.Thanks guys!!Question, does the single have more torque at 4500 than the dual?

[nelson8708]

No, I'm not in a hurry. I just want another motor to work on in my garage. I dont know what it is worth. You can usually pick up a dohc motor for less than 250. They are not worth much, thats why i want to get a second. Just let me know what you want out of it.

[19b]

Nelson, give me a call, 217-202-8341. We can work something out.

[19b]

Nelson?

[nelson8708]

I will give you a call this weekend. I want to wait because i get free minutes on my cell and it gets free long distance.