Plug comparison advice/new TT z Owner ;)

[skypad]

Lookin to replace the plugs in my 91' TT z. Third owner and its got 44K orig miles and recently had the #2 plug foul out or what have you... I have yet to test the coil, but I'm almost 100% sure its just the plug....

Anyway been doin some research and came up with a few sites with the correct plugs, BTW (running stock boost within the 9lb range), stock ecu, and injectors obviously. So wanted a few opinions on price/quality on these 2 sites that have the plugs(narrowed it down to two popular sites). Courtesyparts has importpartspro beat on price by 10-12$ or so. I know Courtesy has always been good to me when ordering parts for my first NA/z and my 240... but the TT Z I just almost wana say I'm "paranoid" to make any mistakes that coulda been avoided by doin the research and ofc turning to the thousands of gurus on nico that have helped me out many times before ;) also mainly for the fact that it's got such low mileage and is in great shape to begin with I wana keep it that way ofc....

So, for all the gurus who wouldn't mind helpin me out on this one, which site should I go with as far as quality,(even though they are both the same part num and plug, the supplier makes all the difference in the quality of the product) and what is the recommended gap for these plugs running stock ecu and everything... I'd jus throw em in right out the box, but I'd rather dbl check the gap becuz ya jus never kno... So thanks in advanced for any help yall !

[*]Courtesyparts.com[*]
http://www.courtesyparts.com/22401-spar ... oppingcart

[*]Importpartspro.com[*]
http://www.importpartspro.com/nispplpfni30.html

[BigTDogg (MA)]

That is the best plug for stock to mildly modded TTZs. Congrats on the new ride! I use Kyle at IPP for all my OEM parts, but Courtesy is good too. You want to gap them to 0.035", ± 0.002"

[skypad]

Cool, thanks TDogg!

[skypad]

Need a good shop to do complete injector replacement in jersey.. 08008 LBI area wiling to travel a few hrs for a good reliable shop...

[BigTDogg (MA)]

Need a good shop to do complete injector replacement in jersey.. 08008 LBI area wiling to travel a few hrs for a good reliable shop...

I've only heard great things about Rich @ RDZ

[skypad]

What do you think about re manufactured injectors?

APW re manufactured injectors

They're cheap after the core return, and one has a warranty.. I was thinkin of doin the job myself following a guide I found that is really well put together..

I don't really have the cash to send it to a shop, nor do I wana put my trust in a shop I've never used before to do the job... The shop I have used in the past recently has been slackin off in quality and care due to new employers so I'm almost forced to do this job myself... Problem is I can't decide if I wana save up for brand new injectors or go with the re manufactured ones.. So any advice on that would be great, as well as an opinion on if a fairly skilled/mechanically inclined guy with the proper tools and guide can do this job his self.. I'm just stuck at this point on what to do and could use the advice...

[BigTDogg (MA)]

I don't really have the cash to send it to a shop, nor do I wana put my trust in a shop I've never used before to do the job... The shop I have used in the past recently has been slackin off in quality and care due to new employers so I'm almost forced to do this job myself... Problem is I can't decide if I wana save up for brand new injectors or go with the re manufactured ones.. So any advice on that would be great, as well as an opinion on if a fairly skilled/mechanically inclined guy with the proper tools and guide can do this job his self.. I'm just stuck at this point on what to do and could use the advice...

IMO, remaned injectors are a bad idea. However, some people have had good luck with Deatchwerks injectors. JECS is the OEM manufacturer, and they're cheaper than the NISMO or OEM Nissan injectors. I would definitely recommend the 1995+ style injectors if your car is a 90-94 Z. The newer styles are more resistant to ethanol.

The job is not too difficult to DIY if you have the time, patience and space to do it. There are some good writeups available.

RDZ is a Z specialty shop, very competent. With the many positive reviews I've read, I wouldn't have recommended them if I didn't think they were capable of the job.

[skypad]

IMO, remaned injectors are a bad idea. However, some people have had good luck with Deatchwerks injectors. JECS is the OEM manufacturer, and they're cheaper than the NISMO or OEM Nissan injectors. I would definitely recommend the 1995+ style injectors if your car is a 90-94 Z. The newer styles are more resistant to ethanol.

The job is not too difficult to DIY if you have the time, patience and space to do it. There are some good writeups available.

RDZ is a Z specialty shop, very competent. With the many positive reviews I've read, I wouldn't have recommended them if I didn't think they were capable of the job.

Will 95'+ injectors fit in a 91' without modification?

Also OFC your recommending RDZ is a choice I would follow through with if indeed I had the cash to ship it there and back, plus labor and parts :/ I was just referring to shops near my area when I mentioned the whole "trust" issue...

So if there requires no modification to fit the 95'+ style injectors, and what I have been reading and hearing about the rebuilt injectors, I guess it would be best to save up for brand new and with that being said going with the 95'+ holding up to the higher ethanol sounds like a reasonable plan. But if I do go with rebuilt, stay away from sites like APW and ebay OFC? Not the first time I've heard positive things about Deatchwerks as well so that's a plus if I choose that path.. Anything "rebuilt" is taking some what of a gamble, and when it comes down to a project like this I guess it just isn't worth the risk..

Thinking for the long run now having to do this again isn't gonna save me any cash by going cheap to begin with... still stuck on which path to choose lol... I have gotten about a 50-50 say from all my friends and everyone I ask ya kno... just so frustrating at this point..

The guide I found most detailed and well put together was the one on 300zx.net/TTZs of Dallas which I came across by entering a search on nico and haven't had much extra time to do more searching atm..
Again thanks in advanced for taking the time to respond and the advice, really appreciate it!

[BigTDogg (MA)]

Will 95'+ injectors fit in a 91' without modification?

Nope, you'll need to do one of the following things:

A) Send your lower plenum (or a 90-94 core so you reduce your downtime) to JWT for machining. Buy 1995+ fuel rails and 95+ injectors, isolators and insulators. You also need to buy the 95+ connectors, and cut and solder/crimp them to your existing harness.

2) Get the retrofit kit from Z1 and you can skip the new fuel rails and plenum machining.

III) For the best performance, you'll want to get the 300° Fuel Rails with 95+ injector connectors. No machining and significantly better fuel flow over stock. 300° kit at IPP.com(includes 615cc/min injectors You'll also need the barbed hose adapters linked here

Keep in mind, if you go with injectors larger than stock (larger than 370cc/min) you'll need to get the EPROM in your ECU reflashed. That usually costs about $100. This is definitely recommended if you plan on doing any kind of upgrades in the future, especially turbos.

Courtesy does have the OEM 370cc/min 95+ style injectors in stock, so even doing a simple 95+ conversion and keeping the same flow rate is possible.

In my 8 years of Z ownership, I haven't found better write-ups than those on these two pages here and here.

When I did mine years back, I did the 95+ rails, machined plenum, new connectors and 740cc/min Nismo (Nissan aftermarket) injectors. You also have to machine the bridge on the upper plenum to allow clearances for the #1 injector plug (this is true with any method of using 95+ injectors on a 90-94 plenum). When I pulled my engine in this Z and replaced my EFI harness, I got a 1995 EFI harness so they plugged directly into the injectors. Works great in both configurations.