Someone tell me again why we can't just run bigger injectors...

[Sp00ner]

Originally Posted by ArrivalBlueSS

the fuel trim cells should take care of bigger injectors in closed loop mode. In open loop there is no fuel trim and you would run extra rich and lose power....

I guess I just didn't run to full power, or something... I really didn't tach it out, but I did get om it pretty hard a few times in the 3 days they were there without the flash... It pulls much harder now, with the flash, but it just really made me curious. I was expecting alot worse.

Tibbet, dont do it! I was just hoping someone with a WB had tried it before and could tell me exactly how rich it was...

[Tibbett]

Shh..I have ways of being able to run them and they ride on all of us gathering

[RL-2005]

wtf is going on?

[Tibbett]

Nothing....

[djt81185]

spooner...do the fuel learn trim cells also affect the WOT tables? If so there should be no problem running larger injecotrs imho.

Dan

[korax123]

Does anyone make any 38 or 40lb injectors??? You could prob swap those in and with a 2.8" pulley not run to rich to shoot black smoke.

[goofyguy]

Well where to begin for you guys.

First the computer can compensate for them in closed loop once the 02 is hot. The car will learn these peramaters and set them in long term maps so the car will eventually start without problems. The car will run rough till the 02 is hot until long term maps get altered by the computer but it will learn them.

For the WOT trims the car once again can learn but on a much slower scale. When in open loop where it just uses a fuel map to give fuel the 02's arent used AS MUCH. it will still use them thats how you can get a cell for lean/rich at WOT. The car can change the long term maps for WOT as well it just takes a lot more time. The first few times you try to WOT the car will basicly flood. This learning curve will take a few hundred miles on a highway till the car is forced to learn.

My charger was able to deal with 2x larger injectors without any modifications just about 50 miles of play on a local highway.

I still have 1 set of 42's to go that are plug and play.

[jmc007]

Originally Posted by korax123

Does anyone make any 38 or 40lb injectors??? You could prob swap those in and with a 2.8" pulley not run to rich to shoot black smoke.

For sure, there is some 37 lb, 38 lb, 40 lb, 42 lb, 44 lb, 48 lb, 50 lb and 60 lb injectors that are compatible with the LSJ (when changing the connectors), available from different companies.

I have a set of 37,3 lb injectors that I ran on my Cobalt SS for merely two months. I remove them yesterday to put back on the 42's. Since I run a 2,6" pulley, the 37 lb ones were a bit small. But it's a very good tradeoff between the stock 34 lb and upgraded 42's.

37,3 lb injectors are 10% bigger than stock, so they run perfect with a slightly modded Ion or Cobalt.

I would sell them for 120$ USD ...

These are thses ones :

http://www.racetronix.com/621037.html

[BlueMonster]

So..I'm lost here. spooner did u get the stage 1 installed with the 7k redline increased? If so hows it feel man..