TheYellowSS

i ordered my pully system, got my plugs and now i need injectors. which should i get, 38 or 42 lb injectors. And what site should i get them from. And is there anything else im missing in order to be good for the 2.8 pullies?

Joewit

You'll need to get a tune or a maf translator and definetly go with 42 injectors from intense

memphisr24

Go with 42 lbers. Trust me. Go on Intense Racing's site. You have to buy them in conjunction with the Casper's wire harness. Another thing you need is TUNING. You need some kind of tuning. You can't just slap that 2.8 on with injectors. It's not going to do the trick. Get a custom tune from Intense or buy a maf translator to trick the computer yourself.

memphisr24

Or buy GM stage 1

TheYellowSS

im piecing gm stage one, its cheaper. im one of those poor souls with out money

TheYellowSS

ill go with the 42s, i was just afraid of the gas. what does it do to your economy?

memphisr24

gm stage 1 includes 42 lb injectors so you don't have to worry. Gas mileage won't go down that much from what i've read.


EDIT: Gm stage 1 consist of a new pcm reflash and fuel injectors that are 42 lbs.

TheYellowSS

im gana get it tuned when i get everthing on there. My friend works at a dyno shop so im just gana do it there

Joewit

Do you or your friends dyno shop have the hptuners software for the cobalt? And if the shop does have the software tell me where it is cause im in delawre too.

TheYellowSS

im 99% sure he as the software, when i talked to him about it, he told me they have done two or 3 ss/sc there before. So im guessing they do. Its in Fenwick

Joewit

Whats the name of the shop? Thanks

TheYellowSS

Motter Perfromance lower fenwick

Shortbus

You might also need, a bigger idler pully, to take up the slack from using a smaller pully, and stop belt sqeak.

TheYellowSS

Isnt there a preformance dyno tuning place in wilmington tho?

TheYellowSS

is the idler pully a nessesity, if it is ill get it if its noti dont have the money. I just want to do it all at one time

Matty

If you ordered the stage 2 belt it will fit perfectly as is.

Quicksilver83

So how much cheaper is it to do it without ordering the whole kit straight from gm?

Matty

If you plan on doing an HP Tune, then don't go the stage 2 route.
Get the pulley size of your choice, 42.5# or 60# injectors and if going to a 2.8" pulley, a smaller belt...then tune it yourself (or someone in the "know" to do it)

Depends on how much the HP Tune costs at your end.

Although the GM stage kits are coming down in price, or so the rumour goes.

patathSS

I didn't put a bigger idler pulley on until I went to a 2.6. How long have you had the car? If you plan on ever going smaller than a 2.8, I would even consider 60# injectors. Much smaller than 2.7" and they are necessary to supply enough fuel.

Quicksilver83

how much ya think it would cost?

Shortbus

My 42.5 lb injectors work great with my 2.7pulley, and set-up i have, a good tune with hp tuners, makes it possible the car runs great, and i had to put a bigger idler pulley with the 2.7, there was so much belt slip, and belt sqeak.

Matty

With the stock belt?

patathSS

Injectors-$160
Pulley-$100
Custom tune-$100-200
Install or Install tool-$100

Grand Total-$460-560

I honestly believe a custom dyno tune with a 2.8 will put you light years ahead of a GM tune that you throw a 2.8 on.

Matty

For sure!

And to the thread starter, the price for the tune is if you know someone with the HPTuner.
If you have to buy it yourself it is <$500.

06black

I'll sell my 42lb injecters if you want them...its the GM injecters so you dont need the harness c


only been in the car a month or so....