hey guys, I was just wondering if anyone would recognize the make of these injectors, they are low impedence 720's. They have a little symbol that looks like the letters "N" and "D" inside a small circle, could that be Nippon Denso??? Are Nippon Denso the supplier of GReddy Injectors? Thanks

 

yup

 

What is the number on the flat plastic edge.
Wouldn`t happen to be 195500-830 would it?
If so they are technically 690cc. Did you get a flow sheet with them?

 

What is the part number on them?

 

when i ordered injectors from greddy they were denso and blue in colour,

if there is a part number i would be sure to double check tho, or have them flow tested if there unlabled

 

well these are the numbers printed in the plastic:

1st injector - 45011, 25, 0, 331, 195500-0474
2nd injector - 23250-45011, 621, FF, 20, 0475

and like i said they both have the ND emblem as well. I'm looking for the reciept for these, they did not come with a flowchart.

 

also what would be the consequences of these being 690cc instead of 720cc? I want to run 720's all around so i was gonna pick up two more 720's and set the rtek.20 for 720/720.

 

According to my data, that is a 185CC low impedance injector made by Denso.

Can't find any info on this one. Looks to be made by Denso but I cannot find 0475 anywhere.

 

185cc?? Well that would be bad considering they are supposed to both be 720cc. I bought them from TLFperformanceparts on Ebay, he is still selling them now. Any thoughts....

 

http://www.witchhunter.com/injectordata1.php4


This link is to Witchhunter. Has quite a bit of injector info based on the numbers/brands etc.

I would have them flow tested to see what they really flow. Most of us have found that at 43psi you will get higher flow than they are rated.
i.e. I have four injectors from the RX7 GSL-SE. They are rated at 680cc but they flowed 704,712,722 and 724cc respectively after cleaning and testing at Witchhunter.

 

Well according to that data, from what i can tell it looks liek one is rated for 185cc like Aaron said, the other rated for 190cc....wtf??? I thought these were 720's??

 

i also dont think thoes are 720's. if they are they have been rebuilt. mine and all the other greddy 720's that ive seen had blue tops but were black. unless anyone can contradict this?

 

they may be 185s that were drilled out to 720 by whoever you bought them from... there is really no easy way to tell without sending them off to be tested.

 

^ yes

 

yeah, thats what i',m thinking, they might have been drilled out. If done right is that okay? I mean can u actually drill them out to have them flow higher? i emailed the seller we'll see what he says... I ahve seen those GReddy ones with the blue tops, I'm thinking about just buying a set of four of those to be safe.

 

yes, yes you can

 

That could be it as well. The "720CC" injectors on my car actually started life as 460CC NA injectors...

 

I've bought a few injectors from TLF...

The first batch I got (2) 720's and (2) 1000cc's all came in the same box, but during shipping they shifted around....he was able to tell me which was which when I phoned in the numbers - but when I talked to a friend of mine he said the ND numbers were for 400somethings and 180cc's.................so I believe thats a common occurance with TLF. I think its what they do, meaning buy used regular sized injectors and rebuild them for greater flow.

 

Yeah i just got a respinse back, good timing too. Thats what he said :

"Venom takes core from the Manu. and then puts their pintail in them to get the Desired cc's from them...."

So yeah the numbers on the TLF 720cc's indicate that they started their lives as 185cc and 190cc injectors. Thats alright by me as they look nice, they are solid and seem to be well built, we'll have to see how long the hold up.
Classicauto, how has your experience with these injectors been, anyone else used TLF injectors???


Thanks for all the help guys..

 

I haven't had any problems, and for the price I don't think they can really be beat..............too easily that is.

 

i knwo that my 750cc injectos started life as 460cc S5 N/A injectos too.. but i have a feeling they are a lil bigger than 750cc... i cant run on them without my safc II pulling like 15% fuel..lol stand alone here i come at tax season

 

cool, neat to knwo these injectors have been brought back to life to fuel our beasts. I plan on running 720cc's all the way around, with the Rtek7 2.0 to handle fuel management. I want to run an aftermarket pump and FPR but can't find a good write up and how to install simple fuel system. I don't want a parralell fuel system, just new steel lines and FPR to hold psi for new injectors. Any info would be greatly appreciated.

 

My god, is that an actual quote? Remind me never to do business with a company that cannot even be bothered to respond to their customer in proper English. And it's not a "pintail", it's a pintal.

They're Denso injectors, so they will be fine. All the RX-7 OEM injectors are made by Denso for Mazda.

 

So I just removed the throttle body and upper intake manifold to got to the fuel rails. I was planning on just seeing what was down there, but now I can't decide whether to just install the 720cc secondaries for now and try that or if I should order the other 720s and redo the hoses in braided steel or new rubber lines.

I'll probably just install the 2 720 as secondaries for now and then redo the fuel system when the turbo is upgraded in a couple weeks. Thanks.

How do you guys connect the walbro 255 to -6AN lines or can you use factory lines up to firewall and then upgrade all fuel lines in engine bay. Sorry for babbling but i'm just trying to figure out what to do for now.

 

Most people just use the stock lines up to the firewall and then use braided from there. You can either flare the stock line, solder/braze/weld on an AN flare, or (yuck) just clamp the braided line in place.