Jump to content
SAU Community

Recommended Posts

Hi All,

Injector issue so time to change out.

Was using S15 side feeds which served their purposes well, sprung a leak.

Would rather purchase new as I have had a decent run out of them.

Looking at going JECs 550s or higher.

I know this widely debated but I don't want to go to a top feed rail.

Regardless I know I am up for a re-tune so was hoping to hear any recent feedback regarding them before I take the plunge.

Old reviews have a mixed bag of feedback regarding them.

Link to comment
https://www.sau.com.au/forums/topic/466513-jecs-side-feed-inj-for-rb25det/
Share on other sites

I am in the same position as you being a 33 engine. 

You are still looking at around $900+ for some 'decent' side feeds like nismo. You are looking at the same cost going topfeed, and the injectors are new tech.

"JECS" 550+ etc as far as i am aware are still highflow injectors. They market them as standard jecs, because that's what they are, jecs injectors... that have been highflowd.

Completely understand how they market them as Jecs and then they are high flowed etc, also understand that they are "oldish" technology, the same "oldish" technology that 33 owners were using 4-5+ years ago.

Considering I was running S15 side feeds I am hoping for recent feedback of any members who have recently installed / used and had them tuned.

As I am running a Nistune board I already anticipate a new tune will be on the cards also.

 

I upgraded to 550 Deatschwerkls which i believe are actually highflowed stockers and they work ok but I think you may be able to get the better new tech injectors to fit in the sidefeed set-up (not 100% on this) but check with Scotty.

I tried JECS 550's - it was shithouse. Tuner was so angry and the car just idled like a bush pig. I chucked the whole lot out and went top feed setup.

Take my word for it and don't waste your money on a side feed setup!

  On 29/08/2016 at 2:27 AM, SkudR33 said:

I tried JECS 550's - it was shithouse. Tuner was so angry and the car just idled like a bush pig. I chucked the whole lot out and went top feed setup.

Take my word for it and don't waste your money on a side feed setup!

Expand  

Were they second hand? Did they get cleaned/tested? Never seen trouble like that with jecs 550s, saying that if you're buying now go with top feeds for sure

  On 29/08/2016 at 3:35 AM, WMDC35 said:
Were they second hand? Did they get cleaned/tested? Never seen trouble like that with jecs 550s, saying that if you're buying now go with top feeds for sure



I bought them of a club member, they were practically brand new. He had the original receipts and paperwork. He had bought them from a supplier in Perth who claimed they were flow matched within 2%.

I got them cleaned and tested before I installed them. The spray pattern was awful and the injectors were not flow matched within 2% error like they promise. I seriously replaced them with a top feed setup a month after I had them installed!
  On 29/08/2016 at 5:20 AM, ADM33T said:

It's def a mixed bag of responses of using re-manufactured side feeds that's for sure.

Expand  

Its quite simple really - if they are in good cond they work. New tech ones work better. PM Scotty and see if he can supply new ones for your sidefeed rail.

http://scottyscustoms.com.au/

Don't do it.. you'll hate yourself. 

Nismo 740s or straight to top feeds. You can fit top feeds under the stock plenum without any issues if you're using 1/2 height injectors. 

http://www.trak-life.com/diy-converting-top-feed-injectors-r33-gts-t-skyline-rb25det/

  On 29/08/2016 at 9:27 AM, ADM33T said:

Thanks Dose, I've read a few of your reviews and feedback regarding them.

Il ponder a little more and go from there.

The top feed option just means more funds out the pocket emoji23.png

Expand  

More funds in the short term, less funds in the long term, & less hating of yourself

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now


  • Similar Content

  • Latest Posts

    • In the US almost everything is E10. It can't exceed 10% by much or fuel systems have trouble adapting. At the same time because MTBE, MMT, and TEL are all banned they need as much ethanol in it as possible to boost octane.
    • I was mostly jesting. In my experience (and probably only my experience) the R34 GTT physical airbox space is actually too small to flow the amount of power it wanted. By sealing the box, I made it so it could only be fed by the ducts themselves. So you can seal it up and get nice cold air which IS good, but at a certain crossover point: More Hot Air > Less Cold Air I don't think you're at this point. In my case merely ducting the hot air intake with a very focused set of ducts counteracts the fact it's in a V8 engine bay. More cold air obviously best. The solution looks great.
    • Nah, the OEM CAI pipe is still installed behind the bumper, it is about 5" x 3" oval at the engine side, tapering down to a 3" pipe behind the bumper where it gets all the ambient air it needs Engine side of radiator support OEM intake pipe "oval hole" that is right in front of the filter My OEM NC1 CAI pipe: From NC2 onwards, below pic, they come slightly smaller at 2.75" diameter with corrugations and a resonance chamber to reduce intake noise, lucky for me my NC1 has the bigger noisy one, LOL   Basically, the "sealed" airbox will just get ambient air from a 3" pre filter intake tube that is the same size, 3" as the rest of the intake pipe post filter, and if a 3" intake isn't big enough to flow enough air for 150 killerwasps then there are other issues The whole intake is basically the same length as OEM, but it is now about 30% bigger from the airbox back through to the new intake plenum than OEM, and the intake plenum is port matched to the head And the intake is now about 30% bigger than my 2.5" exhaust, so the suck, squeeze, bang and blow black magic should be fine, well, to my uneducated understanding of fluid dynamics anyway Talking the the guys at MX5 Mania, it may even make a few more killerwasps as the intake isn't sucking hot air, especially off idle or when in slow traffic when it would be sucking hot air  As for the difference in IAT, I haven't logged IAT yet, as I don't currently have a OBD2 reader, but I will have a play with my thermal lazer thingie next time I take the car out to sèe how hot stuff gets under the bonnet near the intake filter prior to installing the air box, my "assumption is it has to be much better after the air box is in and sealed up compared to what it is now The aftermarket "performance" CAI elephant in the room: Aftermarket CAI intakes typically have the air filter tucked up behind the bumper, with a 2.5" intake tube (the OEM intake pipe is actually about 30% bigger than the fancy pants "aftermarket" version.....WTF), and you need to remove the bumper to service the filter, which is a PITA Like dis:    
    • Nice one, I'd argue that the white S1 RS260 is certainly the best looking of the Stageas. And yes, fully agree on the forum situation. It's a bit of a shame, but at least SAU is a good place to be. I found the facebook groups to give me FOMO because people were trying to one-up each other and show off in some way. Feels much more natural here. There are people with seriously nice builds, but I can appreciate it rather than it making me question my life choices. Might be that people are more open with sharing how much work/money/suffering it takes to actually get there. 
    • Evening, wanted to pop in and finally register to say hi to everyone here on SAU!   It's been a while since I've been active on a forum, but back in the day I used to be relatively active on ClubLexus and other hobby-related forums. I'm glad to see SAU is still around, since with the advent of Facebook and Discord it seems forums aren't what they once were. As a recent new owner of an S1 260RS Stagea, I've found so many older guides and helpful tips from SAU that I figured I needed to join and say a grave thank you. My recent acquisition has only become legal in the US for the past year, and knowing that similar car enthusiasts from across the pond have already figured out the kinks and tricks to get these 25+ year old cars running well. I look forward to diving into more of the SAU forums as well as hopefully contribute some info myself for future posterity.   As a pic tax, here is one of the few good photos I have of my Stagea. I hope to get way more in the future!    
×
×
  • Create New...