My list of mod's
Alta CAI, Alta 15% S/C, DFIC, Alta 2.5 Cat-back.

I just installed a header with a hollow cat, and I was wondering if its time now to install some different ingectors, and possibly a O2 Sim. Not sure what CC injectors to go with, and also should i go with some different plugs as well? I dont know much about these items, so any useful knowledge would be awesome!

Thanks!

 

Bump: I could use some insight guys

 

I do not have enough knowledge on 02 simulators to directly comment but I tried to find some threads that had information.

https://www.northamericanmotoring.co...simulator.html

Just search "O2 Simulator" and see what other information comes up.

Also, when you installed the 15% pulley, did you go to a lower heat range spark plug?

And what is the mileage on your R53?

 

I did new plugs and coil pack when I did my 15% pulley. I also got the JCW 380cc injectors and a tune at the same time. If you don't have any warning codes I'm not sure of the point of an O2 simulator, but lik JohnW94 I don't know much about them.

+1 on getting a lower heat range spark plug. All your mods give a less restricted air flow and more air throughput, so I would guess you would benefit, at least in mpg if not butt-dyno, from lower heat range plugs.

Way at Way Motor Works always has a wealth of information to give if you call his shop. 1-317-201-8670 http://www.waymotorworks.com/

 

Yes, colder plugs are a must,

As far as injectors, all up to you, just some things to think about:

#1 Are you going to go farther with your power mods?

If not the answer is easy....380's, no tune "needed" but will give you what you need, even with a tune.

If yes, then there's,

#2 how soon, and will you have access to a tune?

Anything bigger than the 380's require a tune, won't even run without it, and then I say skip the 440's, everyone is having really good results with the 550's and you'll prob. never need more.

And for anyone who say's that 550's are too much, I just had my tune tweeked and here are some mpg results:
60mph - 34.5mpg
65mph - 31.3mpg
70mph - 30.9mpg
75mph - 27.4mpg
80mph - 27.0mpg
Everyday driving around town 28.3mpg

I did my test on the open hwy @ 50 mile stretch's @ a time, no cruise with emphasis on maintaining a consistant speed not on trying to get the best results.

Hope this helps.

 

Yes I am going to put further mods on such as a cam/head and I do want a tune but I onlynwant Jan to do it. So I guess msd and a tune is in order with a tune...