Alright, I just got the results of my injector servicing from Cruzin Performance. The last result he puts on the form is "Approximate pound-per-hour flow" which is estimated around 15.5pph. First of all, aren't the 2.8 injectors 13pph? These ones didn't come off of my car, they came off an '87. So my question is, are these some bigger injectors that ended up on this wrecked car, or is his calculation method of pph different from the rating that is given by the manufacturer?

 

bump

 

First of all, was everyone else unable to get on to this site for a full day, or was it just me?

Second, why is no one answering my question?

Third, I emailed Rich at Cruzin Performance and he said the estimated pph of the injectors (which was about 15.45pph average) is measured at 43.5 psi. I know this is the ignition on/ engine off pressure of our system, so perhaps the actual rating of the injectors from the manufacturer is for the lower running pressure of the system?

 

Wow, three replies and they are all from me.

 

Have you received your injectors back yet? Be prepared to wait long time. Not because of Cruizin performance but the border customs people! Mine almost took an extra three weeks travel time. Mine are also rated for about 15.5 pph. Now you can come over and help me install my new injectors...if you want.

 

Cool. Thanks for the reply. Well Rich shipped them on Tuesday and the only thing on the USPS tracking page is that they've left Detroit. Funny how I sent something TO the States and it only took a week but it might take much longer to get them back coming INTO Canada. You'd think it'd be the other way around.

I don't think I'll be installing my injectors for a while. I have to rebuild the scrap fuel rail I got with the injectors and then find a day to put them in.

Anyways, glad to hear that yours tested at 15.5 too.

 

I got mine into the car yesterday. It took me about two hours from start to finish and best of all no leaks! I was a little worried because the rubber o rings shipped on the new injectors are a little smaller than the ones on the original injectors so the new injectors sit a lot looser in the fuel rail. But I guess once it's tightened down, it does the trick. What are you rebuilding on the fuel rail? Oh yeah, be prepared to pay another $30 taxes to get your package from post office... customs charges gst/pst on your own injectors. You can also use rich's tracking number on the canada post tracking page.

 

haha i don't really know jack about injectors, but i'm from vancouver too so thought i'd join in and say hi.

 

I'm not paying an friggin customs charges. They can kiss my (insert word of choice here).

I'm rebuilding the FPR. It's not supposed to be serviceable, but you can actually buy a new diaphragm. I'm also going to clean it out really well. But basically I want a super-quick swap. I am also thinking of using an adjustable FPR but it depends on the money/time/effort involved.

Any suggestions on what to clean the fuel rail out with? Will any general-purpose solvent work?

 

I didn't even bother to clean mine out. Gasoline is a very good cleaner. I also changed the fpr. Cheap and easy fix. That stupid little torx bit cost me $5 though.

 

According to summit racing 2.8 engines used 15pph injectors

 

Good to know. Like I said, there seems to be some disagreement about that. I don't claim to know what it is.

 

i also checked carparts.com, same thing. I think what it is is some sites that sell them give you the approximate maximum flow of the injector while others give you the average or more "realistic" flow of the injectors. I am not sure if that is correct but the accel injectors are "stock replacement" injectors specifically for the 2.8 1989 camaro.

Dave...and they are only 173 dollars for a set, kinda weird since some sites sell them for 50 dollars or more. Maybe its because they are sold in bulk, or because they are the "stock" ones and not the "stock performance". What is also unusual is that they have 3.1l injectors that flow 15pph. So maybe 13pph is correct, but they just don't make those anymore so maybe the difference between 13 and 15 is not enough to make a company feel it's important for them to produce both.

For anyone that would buy them I guess I would go for the 3.1l injectors. They are the same flow and may be better performance wise if you have a lot of addons.

Wow, too much....later

Dave

 

When I orginally figured up injector ratings, I thought the 2.8 was 125 hp(13lb). I was corrected later to 135. At 135hp, the injectors would be low end 15lbs.

At the 3.1's 140hp, they would be midrange 15lb, with a somewhat different pattern.

The 3.4's, at 160hp, use 17lb injectors, with a totally different spray pattern.

If you search my username, in the v6 section, I have posted many times how to figure up what size you need. The rating is based on hp made from airflow, not reducing friction, rotating mass hp.

 

Well there you go. I trust Dale's word. My injectors flowed at an average of 15.4pph at 43.5 psi. But when the car is running, the pressure is a little lower so they would probably flow lower in the 15pph range. So that sounds right.

And for the information of those who suspect they have leaky injectors, the junk-yard injectors that I sent had one in the batch that failed the leak down test. So it is probably well worth it to put new/rebuilt injectors on your high-mileage V6.

 

Somebody quick, shoot me