How much would upgrading my fuel injectors really help? I'm planning on keeping the engine mods simple since I still use it as a daily driver, just want a bit more power. So intake, one ball mod, smaller pulley(haven't decided on size yet), colder plugs, spark plug wires, coil, fuel injectors, and finally a custom tune. The fuel injectors are looking a bit expensive right now, and just wanted some input. Thanks!

 

You might take a look at this thread: https://www.northamericanmotoring.co...d.php?t=128031

It talks about most of what your asking. Just read most of it, it gets into injectors and other stuff. Hope it helps .

 

With a good tune (Jan's) with a 15% pulley, intake and exhaust it helps the top end of the RPM range.

Not a big change, but it does help some.

 

I have a 2005 MCS w/ basic mods (15%, CAI, exhaust, JCW 380s) and still ran out of fuel above 6500 rpm w/ Jan's tune. IMO, 380 injectors are a must to maximize the benefits of the awesome RMW tune.

 

How lean were you running the last 500 rpm or so Larry?

Jeremy

 

Damn lean after 6500 with 380's? What did you have on the car?

 

High 12s

 

What A/F did you and Jan want to produce that high up? Did you upsize your injectors over the JCW then?

Jeremy

 

I'll let Jan speak to this issue but I believe he wanted the A/F in the mid to high 11s. The A/F only went into the 12s at the very top (above 6500). I do 99% of my driving below 6,000 rpm and the TQ and HP curve were so good, we did not want to change anything. The car has never run better and I have thrown no lean codes. Check out how flat the TQ curve is. The car is an entirely different animal after Jan's tune. The green curves are a prior RMW tune, not baseline.

 

2005 MCS w/ Alta CAI, 15% pulley, 62 mm TB (waste of $$), Milltek CB, and Viagra in the gas tank) Seriously, Jan mentioned that I had a very, very strong car. My peak WHP and TQ are 219.4 and 193.4 respectively and the area under the TQ curve is awesome.

 

Very impressive!

When would we throw a lean code that high in the rev band: 13, 14, 15, A/F ratios?

Now back to finishing my S-lite end tables..... .

Jeremy

 

Thanks JIMINNI for that link, and everyone else for the responses. It definitely sounds like injectors are a good idea since I want a custom tune. Would it still be worth getting the tune if it's not done by Jan? Who in the San Diego area can do it? I would even drive to LA if it's worth it.

 

Drive to LA, it's worth it.

 

Thanks, I never really looked up where he is. Didn't know he was in Irvine! Well, his business is anyway. So when I'm ready I just call him and setup a date and time? Also, it would still be about an hour and 10 minute drive, so would it be best to install the fuel injectors once I get there?

 

what size is our stock injector?

 

340cc

 

Best thing would be to call him. He may not have a extra mechanic there to install your injectors at that time. Here is his link:https://www.northamericanmotoring.co...lutionmini.com

 

Drove mine with the JCW injectors for a few days before getting the JCW flash and it ran just fine.

 

Shouldnt it run fine with 380's and a pulley until its tuned? Or is it dangerous?

Jack

 

I was told it is not dangerous, but I have a flat spot at 3000 rpm since I installed them. Can't wait to get my car into Jan's hands.

 

Yes me to. Going to get it re-tuned next month in Florida...Pulled 197 last month....

Jack