Ok, I'm not new and I know about the search button. Can't find anything useful. When I bought the car the guy had told me the injectors had been upgraded but he really didn't care to know to what. He had just bought the car to sell it. I'm not very familiar w/ the fuel system, so my question is how do I figure out what I have for injectors. Be nice to know for sure since I'm planning on buying a PFC soon. I do all my own work on my car, like I said just not familiar w/ these so a little help w/ be great.

 

Its most likely only the secondaries that are upgraded. Pull them out and if they aren't denso's you should be able to figure out what size they. If they are denso's and they have been ported by RC I know they inscribe some numbers on the side. they might be able to tell what size they are if they did them and you gave them the numbers. If someone else ported them its pretty easy to tell since they are side feed you can just tell they look drilled out kinda.

 

It sounds like you have the stock ECU (or chipped, or w/piggy-back), which can't handle anything but stock-sized injectors. If the car seems to run reasonably okay, you have stock-sized injectors. If you had larger-than-stock injectors, the car would run like total crap and bog, buck, and stumble all over the place.

Stock sizes:
primary: 550cc/min x 2
secondary: 850cc/min x 2

If you want to be absolutely sure, and get your injectors cleaned in the process, you could remove them and send them to RC Engineering (or another injector service shop) and have them cleaned and flow tested. But I can tell you that I am nearly certain that you have stock injectors based on your ECU being not-a-standalone (PFC, Haltech, etc.).

-Max

 

Can you really tell that they have been enlarged just by looking at the injector? I never noticed that, and to be honest I doubt this is true.

-Max

 

without any markings, the easiest way to tell is to send them out for a flow test and the report you get when returned will have their flow rate on them.
The only thing you can tell right now is if anyone of the injectors are top feed (usually secondaries) they will be larger than 850 cc/min.

 

If you have a stock ECU and the car runs okay, you have stock injectors.

The "upgraded" comment from the previous owner could really mean "cleaned and reinstalled", "replaced", "replaced with alternately-branded version of stock part", or even "I painted the top green". Or he could just not know what he was talking about. Being confused about what parts are installed on your car is amazingly common -- see all the eBay listings and personal web sites with significantly inaccuracies about what is really on the car.

-Max

 

Well I can't argue cause I have no idea what the hell I have for injectors. I can say though that I have a Pettit remapped ecu, if that helps at all.

 

That helps. It also means one of these two things is true:
1. You have stock-sized injectors.
2. Your car runs very badly under any boost or over 4000RPM (when the secondary injectors come in).

-Max

 

Ok well, I can't verify the first one but I can say for sure that number 2 is not true at all

 

pearlyellow,

Max is right, if you have the Pettit ECU, you have stock injectors. The previous owner probably just had them cleaned and flow balanced, not enlarged.

 

Thanx, just wanted to get that figured out. One of the few things left I didn't know about my car. Appreciate it.

Jeff