I was looking at some fuel injectors at summit racing for a 1996 camaro 3.8L I was wondering if anyone know how many pph the stock injectors are. Also with a stock engine with the only upgraded parts would be wires and a cold air kit would I get any benifit by upgrading to a higher pph injector at all, HP or MPG wise? It says the the higher pph injector will actually increase mpg for some reason. I think because the computer still controls how much gas is injected but the higher ppg injector is capibal of making better fuel atomizing as well as under more pressure making the fuel burn more efficent. So if my car could benifit with out effecting drivablity what pph injectors would you recomment for my car and set up. Thanks ... Erik

 

 

stay stock... you dont have the mods to even bother with it. IMO

 

the stock injectors in the 3.8 i believe are 19#/hr.

using this formula: (lb. hr.) * (duty cycle) / (bsfc) * (cyls) = (hp)
(bsfc = .5 for n/a-nitrous cars, .45 for boosted apps.)
this would allow for 182hp @ 80% duty cycle, or 228hp @ 100% duty cycle (you don't want this to happen).

doing a little math, that would put the injectors of the 3.8 working at about 88% duty cycle. not too shabby but a little off from 80% (which is perfect according to chip makers/programmers ive talked to).

so putting in bigger injectors would change that down probably, but then since you are at only 88% duty cycle, that means that they arent working that hard, and you would need a few more mods to really need larger injectors. I would agree to stay stock.

 

Yeah i'm not really looking for more horse power, compared to better gas milage. Now if I get both.... I wouldnt complain. It did say on summit racing that their accel performance injectors would increase MPG is that true? Now they have 2 sets a 19 pph and a 21 pph. Now if you said I wouldn't get any benifit from bigger injectors, would I get any benifits from the 19 pph injectors that accel makes? If the 19pph is what you have stock, would going to there performance 19 pph injectors give any benifits? or are they pretty much the same as stock? Keep in mind I only have performance wire and a cold air kit with K&N filter. I may get a flowmaster cat back exhaust and possible a catco converter. My biggest question though is even though I dont have that many mods to warrent bigger injectors, will they still help with MPG (as I live in Cali and gas prices are high and I do a lot of long distance driving and want to keep the camaro) and would it hurt the motor or drivability? Also is there a difference between the stock and accel 19 pph injectors?

 

cant tell you what the diff. is -- never used accel injectors. i would call accel and be like, explain to me why i need to buy your injectors over my stock ones.

let them give you the sales pitch and see if its worth it.
just what i would do.

 

The stockers for your 96 are 22lbs/hr. Unless you can tune for them it's really not worth it.... and not being 97 or newer, you can't tune for them

 

So are you sure its 22 or 19 like the other guy replied. I noticed accel makes 19pph for this vechile, why would someone make a reduced performance injector?

 

They are 22# and do not use Accel injectors, I have heard of way too many leaks. I am running about 95% duty cycle on mine, so I will be upgrading to 30# in the springtime. I may even run 36# if I consider running forced induction or nitrous oxide. I will have to dyno tune anyway. -Tim

 

Just to let everyone know, I called up both accel and summitracing and found that the 1996 3.8 camaro does use 19# injectors and not 22#. I decided to change them and ordered a new set because of a code P0175 I am having that I narrowed down to fuel injectors or a bad O2 sensor. Instead of going down and paying $80 for a dealer to find out I am just gonna throw the injectors at it because I figure with 117,000 miles on it now it would probally do the car some good with fresh ones even if it is the O2 sensor.... if it fixes it great if not then I know to change the O2 sensor. Hopefully it will improve my mpg. I am getting 26.5 - 28.5 mpg hope I can eventually with a few mods get it up to 30mpg and a little extra power as well as a bonus. Once I get it fixed I will let you know what it was and post it for future reference. Oh yeah and I confirmed through both accel and summitracing that 19# are fine and upgrading to a higher pph wont benifit at all, in fact you might have to flash progam the ecu if you did and unless there are some major mods there is no need, but new injectors can definatly help if they are the stock replacement. Looking at auto zone, NAPA and other auto parts stores 1 injector was between $68 and $105 so buying theirs is much more expensive than the accel from summit racing which are $195 for all 6

 

I put in the accel injectors. over 1200 miles on them now and no check engine light. It solved the code P0175 problem. Saved me from trying out the O2 sensor first which is more of a pain than the injectors. Car runs better and MPG has improved. One note though is that when I started it up for the first time I heard an injector tick coming from bank 2 Not sure which injector. Later it moved to Bank one. Now it pretty much has gone away. It used to be immediatly when you started it.... now it only comes back after the car is warmed up... and now it pretty much dont hear it anymore... doesn't mean its not there but it doesnt seem to hurt anything. I got 2 new replacement injectors from summit because their under warrenty. Since the noise seemed to move and now is pretty much gone I decide to send them back and not go thru having to replace the injectors again. If its not broke why fix it... I heard that injector ticks are common on GM vechiles anyways. Maybe these injectors just needed to be broken in.

 

I put bigger injectors in mine.. and gas milage is bad.. i get about 16mpg.. but i only burn 12 or 12.5 gals.. I never let my tank get any lower than that.. also i have a 3.4.. i went from 17s to 19s acel. havent had any problems with them.. car runs really well. just burning more fuel..

 

I stayed with the stock 19# injectors for the 3.8 so I got better MPG over my old tired leaky 19 # injectors

 

Do not put different injectors in your car if you don't have any serious mods, and do not put new ones in if you have no way to tune them. If you do you will run stupidly rich and get crappy fuel economy.

FWIW I have Lucas 42.5pph.

 

The ones I put in mine were the accel stock replacement. The were much cheaper then going to autozone. They were $200 from summit racing where it was between $400 and $600 from parts stores to replace all 6. I wanted to replace them all at the same time... no need to go and pull the fuel rail 6 different times plus tring to figure out which one ios leaking is more hassel than its worth. Anyways I have had no problems with the accel stock replacement 19# (original size in the 3.8) No tune required when you use stock replacements... only if you bring it up in size. I have had these in for over 1200 miles and I have seen my gas milage go up and the car runs better and no more P0175 code. I wouldnt say any horsepower increase, I haven't notcide anything but Im sure it helped bring some lost hp back since the old ones were leaking bad enough to throw a code. I am in no way saying it brought it over what it was stock brand new but may 1 or 2hp (not noticable) that might have been lost due to leaky injectors