SR20DE Question(s) - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

Dan12020 · 10-11-2005, 11:41 AM

Ok guys, I'n pretty new here.

Like I posted in the newbie forum a couple days ago, I had this deal fall into my lap. For $500 I can buy a running KA 240sx but included in the deal is a JDM RWD SR20DE that needs new rings. I'm pretty sure it doesn't have a wiring harness though.

Now I have a couple questions, what car in Japan did the RWD DE come in? Will a DET harness work with the DE, and if not, where can I get an uncut JDM DE harness? What DET parts will work on the DE, because I am planning on turboing it, probably right after christmas, and I want a decently strong motor?

I have searched but I haven't found any clear answers. Any help would be great because I really don't want to pass up on this deal.

CarloSR · 10-11-2005, 03:56 PM

Quote:

Originally Posted by Dan12020

Now I have a couple questions, what car in Japan did the RWD DE come in?

Nissan Silvia.

Quote:

Originally Posted by Dan12020

Will a DET harness work with the DE, and if not, where can I get an uncut JDM DE harness?

No. I don't know. Try SR20forums, ebay, etc.

Quote:

Originally Posted by Dan12020

What DET parts will work on the DE, because I am planning on turboing it, probably right after christmas, and I want a decently strong motor?

All DET part will fit on the DE. The CAS or spark distributor is different, the DET uses a coil in every cilinder the DE uses a rotor and cap; MAF are different, O2, ECU and harness are different. The compression is different too 9.5:1 vs. 8.5:1.
Good luck.

mRclARK1 · 10-11-2005, 04:49 PM

I'm not sure, but I think the DET harness should work with a little modification. I would try these websites: Superiornissanmotorsports.com, heavythrottle.com or wiringspecialties.com. Email or call them and one of them should be able to send you in the right direction I would think; or even maybe hook you up with an uncut DE harness.

Your going to have to lower that compression to when you turbo it as well to the stock DET's 8.5:1, or you will risk damage to the engine.

Sounds like a good find for $500.

projectRDM · 10-11-2005, 05:03 PM

Or you could keep the KA.

boosted-two40 · 10-11-2005, 07:32 PM

Keep the KA if its running, installing the DE is a pain in the ass, at least the wiring is, its not really worth all the 1.trouble 2.Time 3. money to do the non-turbo swap... and turboing the DE isnt very practicle and reliable, the compression also has a little to do with it too.

nissantuner22 · 10-11-2005, 08:48 PM

wow the misinformation represented by the last post boggles my mind. For starters, head over to sr20deforum.com and educate yourself on the topic of turbo charging the SR20DE motor. FWD B13 guys have been doing it for years with great results.

I agree, if the KA is running good leave it in, its an adequate motor for more than most people.

However if you want to build it up, its a great motor. Just like the KA, it just all boils down to your preference. To say the SR20DE is a bad choice to turbo because of its compression, and reliability, is just ignorant. Plus the SR20DE runs off the KA24DE harness just fine, so i fail to see the wiring "issues"

More importantly though, buy the 240 for 500 bucks. thats just a sound economical decision.

boosted-two40 · 10-11-2005, 09:03 PM

no, dont get me wrong there are no wiring issues, im just saying its a pain in the ass to splice the harness, and its just not worth it when you have a perfectly good motor in it already and you dont have to spend the time to modify the harness.

Dan12020 · 10-11-2005, 09:37 PM

Quote:

Originally Posted by nissantuner22

I agree, if the KA is running good leave it in, its an adequate motor for more than most people.

However if you want to build it up, its a great motor. Just like the KA, it just all boils down to your preference. To say the SR20DE is a bad choice to turbo because of its compression, and reliability, is just ignorant.

Well, my plan is to drive the 240 with the KA in it for a while and rebuild the SR while it's out of the car, my plan was to lower the compression a little anyway, and this way I can do the SR the right way, so I don't blow it up.

Quote:

Originally Posted by nissantuner22

Plus the SR20DE runs off the KA24DE harness just fine, so I fail to see the wiring "issues"

What do you mean it runs off the KA harness just fine? I'm assuming you mean if the SR harness and the KA harness are spliced together it runs fine, but let me know if I'm assuming wrong.

Thanks everyone for all the help so far.

mRclARK1 · 10-12-2005, 01:07 AM

I would suspect that KA is probably on its last legs. $500 is a good deal either way, but $500 for a good condition 240 KA and not so good SR20DE seems a little to good to be true.

As for turboing the SR20DE; it's a good motor to turbo, like I said in my last post I'd just lower the compression, (your rebuilding it anyway) put in a metal head gasket, and slap on a turbo. The DE is really the same motor as the DET, just no turbo, hence the higher compression. Lower the compression to the stock 8.5:1 on the DET, add a turbo kit and you got yourself an SR20DET.

The wiring is probably the biggest pain. I know you can modify the harness from a KA24DE to run the SR20DET and still use the coil on plug system (all you need from the SR harness is that wiring), and you need the SR ECU. But since the SR20DE uses a distributor, like the KA, I would think it would work to do the same with the KA24DE harness to make it run the non-turbo SR.

Good luck with it.

boosted-two40 · 10-12-2005, 12:55 PM

Let me know how it comes out it turns out, because i bought my 240 with a blown KA for $300. I purchased my SR20DE on ebay with 55,000 miles on it for $600. Im currently wiring it up with the help of an experienced machanic. My E-mial address is [email protected] I would appreciate knowing how it runs with it turbo'd, thanks

10-11-2005, 11:41 AM	#1
Dan12020 Join Date: Oct 2005 Location: Delaware Posts: 2 Trader Rating: (0) Feedback Score: 0 reviews	SR20DE Question(s) Ok guys, I'n pretty new here. Like I posted in the newbie forum a couple days ago, I had this deal fall into my lap. For $500 I can buy a running KA 240sx but included in the deal is a JDM RWD SR20DE that needs new rings. I'm pretty sure it doesn't have a wiring harness though. Now I have a couple questions, what car in Japan did the RWD DE come in? Will a DET harness work with the DE, and if not, where can I get an uncut JDM DE harness? What DET parts will work on the DE, because I am planning on turboing it, probably right after christmas, and I want a decently strong motor? I have searched but I haven't found any clear answers. Any help would be great because I really don't want to pass up on this deal.

10-11-2005, 05:03 PM	#4
projectRDM Post Whore! Join Date: Dec 2002 Location: Atlanta Age: 51 Posts: 13,812 Trader Rating: (12) Feedback Score: 12 reviews	Or you could keep the KA. __________________ FORMERLY R240NA Learn what's really going on and protect your assets now before they're gone forever: www.paypalsucks.com

10-11-2005, 08:48 PM	#6
nissantuner22 Zilvia FREAK! Join Date: Mar 2004 Location: Gainesville, Fl Age: 40 Posts: 1,056 Trader Rating: (-1) Feedback Score: -1 reviews	wow the misinformation represented by the last post boggles my mind. For starters, head over to sr20deforum.com and educate yourself on the topic of turbo charging the SR20DE motor. FWD B13 guys have been doing it for years with great results. I agree, if the KA is running good leave it in, its an adequate motor for more than most people. However if you want to build it up, its a great motor. Just like the KA, it just all boils down to your preference. To say the SR20DE is a bad choice to turbo because of its compression, and reliability, is just ignorant. Plus the SR20DE runs off the KA24DE harness just fine, so i fail to see the wiring "issues" More importantly though, buy the 240 for 500 bucks. thats just a sound economical decision. __________________ Current Project: Operation: N/A SR: 93 Silvia Q SR20DE Engine with go fast goodies. , "Common problems 240sx's suffer from are curbs, trees, ditches, and other immovable objects."thx247 "on the tounge... there is no guardrails."- citizen

10-12-2005, 12:55 PM	#10
boosted-two40 Join Date: Apr 2005 Location: america Posts: 39 Trader Rating: (0) Feedback Score: 0 reviews	Let me know how it comes out it turns out, because i bought my 240 with a blown KA for $300. I purchased my SR20DE on ebay with 55,000 miles on it for $600. Im currently wiring it up with the help of an experienced machanic. My E-mial address is [email protected] I would appreciate knowing how it runs with it turbo'd, thanks Last edited by boosted-two40; 10-13-2005 at 07:02 PM..

10-11-2005, 04:49 PM	#3
mRclARK1 Post Whore! Join Date: Sep 2005 Location: Location? Posts: 4,205 Trader Rating: (0) Feedback Score: 0 reviews	I'm not sure, but I think the DET harness should work with a little modification. I would try these websites: Superiornissanmotorsports.com, heavythrottle.com or wiringspecialties.com. Email or call them and one of them should be able to send you in the right direction I would think; or even maybe hook you up with an uncut DE harness. Your going to have to lower that compression to when you turbo it as well to the stock DET's 8.5:1, or you will risk damage to the engine. Sounds like a good find for $500.

10-11-2005, 07:32 PM	#5
boosted-two40 Join Date: Apr 2005 Location: america Posts: 39 Trader Rating: (0) Feedback Score: 0 reviews	Keep the KA if its running, installing the DE is a pain in the ass, at least the wiring is, its not really worth all the 1.trouble 2.Time 3. money to do the non-turbo swap... and turboing the DE isnt very practicle and reliable, the compression also has a little to do with it too.

10-11-2005, 09:03 PM	#7
boosted-two40 Join Date: Apr 2005 Location: america Posts: 39 Trader Rating: (0) Feedback Score: 0 reviews	no, dont get me wrong there are no wiring issues, im just saying its a pain in the ass to splice the harness, and its just not worth it when you have a perfectly good motor in it already and you dont have to spend the time to modify the harness.

10-12-2005, 01:07 AM	#9
mRclARK1 Post Whore! Join Date: Sep 2005 Location: Location? Posts: 4,205 Trader Rating: (0) Feedback Score: 0 reviews	I would suspect that KA is probably on its last legs. $500 is a good deal either way, but $500 for a good condition 240 KA and not so good SR20DE seems a little to good to be true. As for turboing the SR20DE; it's a good motor to turbo, like I said in my last post I'd just lower the compression, (your rebuilding it anyway) put in a metal head gasket, and slap on a turbo. The DE is really the same motor as the DET, just no turbo, hence the higher compression. Lower the compression to the stock 8.5:1 on the DET, add a turbo kit and you got yourself an SR20DET. The wiring is probably the biggest pain. I know you can modify the harness from a KA24DE to run the SR20DET and still use the coil on plug system (all you need from the SR harness is that wiring), and you need the SR ECU. But since the SR20DE uses a distributor, like the KA, I would think it would work to do the same with the KA24DE harness to make it run the non-turbo SR. Good luck with it.