Isis OE Replacement Coil Pack Review

[jorge1190]

I recently had the chance to get my hand on a set of ISIS OE Replacement Coil Packs and wanted to share my review of a quality product. These will be going on my built SR20 with a power goal of 500 WHP. I looked into these to replace my tired coil packs after experiencing spark issues at 440 WHP on 23 PSI.

All initial tests were done on a stock SR20 with long term results and dyno results coming once I get some miles on these. These were swapped into an SR20 with stock coil packs and then tested. The engine ran exactly like it should, idled great, revved smoothly, and responded great.

First Impression:

-Great quality
-The boots were tight and fit nicely
-Rubber seals were very flexible and had clean edges
-Quality seemed identical to OEM
-The coil packs fit exactly like OEM and bolted down.

http://i62.tinypic.com/wswbuq.jpg
http://i59.tinypic.com/2hozsir.jpg
http://i57.tinypic.com/x1d8k7.jpg
http://i59.tinypic.com/13zzwub.jpg

Items needed for install:

-4mm hex key to remove the coil pack cover if you have it
-10mm socket to remove the bolts holding the coil packs down
-Remove your coilpacks and just drop these right back in
-It takes about 10 minutes and is a great option to replace your tired OEM coil packs

Here is a direct link to the product:

ISIS OE Replacement Ignition Coil Pack - Nissan S13/S14 SR20DET - Enjuku Racing Parts, LLC (http://www.enjukuracing.com/products/ISIS-OE-Replacement-Ignition-Coil-Pack-%252d-Nissan-S13%7B47%7DS14-SR20DET.html)

Follow-up review coming in a few months after some mileage and dyno tuning.

[PeaceOnesxWai]

Curious to why you went with "OEM" Replacements instead of Splitfires or even LS coils? Especially when your aiming at 500hp

[inopsey]

not worth the $10 saved over oem nissan, maybe if they were half price oem nissan i would consider them.

[S14DB]

not worth the $10 saved over oem nissan, maybe if they were half price oem nissan i would consider them.

Where are you seeing new OEM's for $10 more? They are $120($30 x 4) at FRsport.

Nissan 22448-50F01 OEM Ignition Coil Pack S13/S14 SR20DET Engine (http://www.frsport.com/Nissan-22448-50F01-OEM-Ignition-Coil-Pack-S13-S14-SR20DET-Engine_p_12515.html)

[Gar9854]

Here. And frsport is over priced on everything.. even the "deal of the day" isnt a deal

http://www.nissanparts.cc, http://www.nismoparts.com (http://www.nissanparts.cc/partlocator/index.cfm?action=MorePartInfo&PartID=1199426&siteid=218242&catalogid=9759)

[dorkidori_s13]

funny thing about frsport, i find their pricing is a little more expensive than their competitors on MAYBE every 2 out of 15 parts i source/purchase on their site (and the difference in pricing is usually marginally different)... but everything i order reaches me within 24 hours, their staff is very friendly and very courteous, damn near everything on their site is IN STOCK and they photograph every product they sell so you never get stuck with dummy pictures or stock photographs from the manufacturers wondering what exactly youre ordering. id rather pay a few bucks extra to know that its instock and ready to ship, isnt on backorder, that the item in the pic is the exact one im getting and having piece of mind knowing that the staff i deal with there knows who i am and actually calls me by name as i have been a repeat customer to a service that is deserving of it as they actually take care of their customers.

but i guess $80 for an OEM replacement coilpack that is meant to last the lifetime of the car is a heavily overpriced item isnt it? perhaps if $14 difference between the two is such a big deal, building/restoring a 240sx is not where your priorities should lie (not hating, being 100% factual)



though i am very curious as to how those ISIS units will hold up, esepcially under high heat and ignition load in higher horsepower motors. keep us posted!

[inopsey]

Here. And frsport is over priced on everything.. even the "deal of the day" isnt a deal

http://www.nissanparts.cc, http://www.nismoparts.com (http://www.nissanparts.cc/partlocator/index.cfm?action=MorePartInfo&PartID=1199426&siteid=218242&catalogid=9759)

they are even cheaper at mynismo

[cbcm2435]

splitfires are about the same price as the isis coils Splitfire SFDIS004 DIS-004 Direct Ignition Upgraded Coil Packs S13 S14 SR20DET (http://www.frsport.com/Splitfire-SFDIS004-DIS-004-Direct-Ignition-Upgraded-Coil-Packs-S13-S14-SR20DET_p_1375.html)

[dorkidori_s13]

MOST folks on zilvia dont need anything higher than OEM coilpacks. Ignition break up doesnt really start happening until the 400-450hp mark (from what I remember). Splitfire coilpacks are usually just for the "JDM Tyte" factor if running anything around stock numbers.


I wanna hear more on the Isis coilpacks.

[SamsonS4]

I don't know about jdm type but it safe guards the engine once you hit certain hp and certainly looks nice in the bay

http://performancecarmagazine.s3.amazonaws.com/wp-content/uploads/2011/07/Nissan-S15-Silvia-eng-330x220.jpg

[jorge1190]

I went with the OEM replacement coil packs because my car held 23 PSI and 440 WHP on my old OEM coil packs and ran great but we had to decrease the gap to .015. I figured before going through wiring in LS1 coil packs and making spark plug wires, which make the engine bay look messy in my opinion, I would see if fresh coil packs would make a difference and let me open up the gap.

Splitfires were considered except that if one goes out you are forced to buy an entire new set because there is no replacements. Once I found this out these were at the bottom of the list.

The price of these is 50 a piece on Enjuku. Another reason for doing this is that I think what Isis/Enjuku is doing as far as OE replacement parts is great and needed. If they can provide a quality product it could really benefit people once they make other OE replacement parts that are not as readily available. I will be doing a long term review on these letting everyone know how they hold up under increased ignition load, increased dwell times, and track days as well as street driving.

[jorge1190]

Just to update the thread,

Stock ignition system using the Isis coilpacks the car made 521 RWHP and 405 ft lbs TQ @ 25 PSI.

[va240dude]

Nice numbers man! Hopefully I'll get to see the car sometime.

[oewoko]

Hey jorge. Sorry for bumping such an old thread.

Was wondering if the Isis coils are still holding?

I'm getting spark plug blow out now. Was gonna get an ignition amp. But I'm seeing people making a lot of power like you on OEM coils, so figured I wouldn't need an amp with my t28

Thanks!

[TheRealSy90]

Never heard of an ignition amp for sr20's. I'd just go with gm coil packs and never have to worry about it again, plus they are cheaper and easy to find at a junkyard.

[cmartin240]

Hey guys,

Looking for some input on redtop SR20DET S13 coil packs. 2 of mine have heat fractures and I was receiving stutter/misfiring when the boost hit occasionally. I gapped the plugs a little tighter (0.8mm) and this band-aided it for a month or so. I inspected the coils again and the fractures are growing larger. I laid one coil pack on top of the valve cover (disconnect corresponding injector) and started the engine. Before I could even get out of the seat, I heard it arcing. It was arcing through the crack to the valve cover. I wrote this saga to give other SR20 owners something to inspect as I'm guessing oem coils will all fail in this manner due to the design.

NOW as for aftermarket coils. I don't like the idea of Splitfire as if one coil fails, you end up buying an entire system again. Uh no. You can't mix in an OEM coil as the design is different. The S15 coil packs share this "skinny" design so they went to that for a reason.

S13 OEM and Isis: These can be purchased individually and will probably be available for a very long time. My issue is these are the same design that suffers from heat fracturing. I am curious who the heck is making the coil packs for Isis and if they improved upon the OEM internal coil design and boot/insulator materials. They are within $10 of each other so I just want the better one.

So jorge1190, how are your Isis coils holding up? Please anyone feel free to chip in as this has to be a common failure item on this engine. Thank you

[ixfxi]

this doesnt seem like a review, it seems like an advertisement. you bought replacement coils, installed them, and they work. link to product.

dont people take the time to get technical anymore? i'd rather spend 100% more to get OEM quality than risk buying some defective junk thats going to leave me stranded. what engineering goes into copying the oem COPs? id be hard pressed to see them make any changes/improvements.

[nixtr]

what engineering goes into copying the oem COPs? id be hard pressed to see them make any changes/improvements.
msglngthbtch

[jorge1190]

I actually forgot about this thread. Started experiencing pretty bad spark blow out at 20 psi+. I got a set of splitfires which remedied the issue and put the Isis coil packs on an S13 SR with a T28.

This SR also immediately had spark issues under load at the track. We swapped with oem coil packs and it was remedied. I spoke to Enjuku who stated that they have not had any other issues with coilpacks from anyone else.

As far as a recommendation for upgraded coilpacks after trying different things I would take the time to wire in LS coilpacks if going for higher power and are looking for serviceability. Splitfires work great but once one goes out you will be dropping 300+ on a new set.

[cmartin240]

Thank you very much for replying to my message guys. Really sounds like the OEM coils are the best bet. You can buy them individually, they are engineered for reliability, and they will probably be available for a rather long time.

It would be interesting jorge1190 to ohm out the Isis coils and see if they still fall in the ~1.0 Ohm spec. That company could sell them like crazy if they bothered to release the R&D that went into them and who is building them.

As for Splitfire, it is not very convincing that they have zero company locations in the USA or even a website in English. It might be a great product, but if I can't even pick up the phone and talk to someone in English about warranty or service parts, I'm not buying that.

Hopefully we can continue to get more input on reliability and performance issues from others on the Isis and Splitfires.

[jorge1190]

I can appreciate the idea behind these OE replacement parts. I see it as being similar to buying an alternator from a parts store that is their rebuild cheap brand. It is a gamble as to how long it will last but works for most people for its original intended purpose.

LS coils allow you remove another possible point of failure in the ignitor. You can also get then at any parts store or GM dealer.

[TheRealSy90]

Pro Tip: Z33/350z coil packs are a drop in upgrade on s13 sr20's. They even use the same plug and bolt in the same, but support way more power. Only thing you have to do is switch two pins on the plug. Possibly an igniter delete but I don't remember at the moment.


Great now everybody is going to buy up all the z33 coil packs :'(

[S14DB]

What was the resistance across the coils?

[mhubeny180sx]

lololol isis parts *vomit*

[cmartin240]

I wanted to show everyone my heat fractured coil. 2 of my 4 did this. See attachment. I am betting this is a common failure. I verified both coils were arcing through the housing crack by resting the coil on the valve cover, unplug the corresponding injector so you don't flood the cylinder, and start the engine. I could hear the arcing to the valve cover and grabbed it with a leather glove so I could see the arc (be careful).

[!Zar!]

ISIS Maf's suck.

So...

[turboshoebox]

Isis anything sucks. Why be so damn cheap?