2.0L LSJ Performance Tech 205hp Supercharged SS tuner version. 200 lb-ft of torque.

question for the educated...

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Old 01-07-2009, 01:04 PM
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question for the educated...

I have a question I hope can be answered.... I bought a 2.8 pulley kit and 42lbs injectors... I ihave been told that i need to have them tuned before i drive it. Then I was told by a someone else you can install them without the tune as long as you don't race. While yet someone else said you can drive it without the tune but it will not preform as well. So i am a bit confused.... Can the pulley and injectors be installed with out a tune for awhile and is there any damage that may come of it? I want to get it tuned but money is tight as most people know. So the tune may not be for a month or so.....
Old 01-07-2009, 01:05 PM
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You need a tune.
Old 01-07-2009, 01:06 PM
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i would wait till you get money for a tune better safe than sorry
Old 01-07-2009, 01:06 PM
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are you stock right now? If you are, and you switch to the 42#, you CANNOT drive your car.

You MIGHT be able to make it to the dealership. I would not drive that car with the bigger injectors and no tune. Bad idea.
Old 01-07-2009, 01:07 PM
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hey if your going to mod....tune as you go!!!!.....I didn't tune as I went and I blew 2 engines. Now I tune for different seasons.
Old 01-07-2009, 01:07 PM
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And a 2.8 pulley with stock tune? even worse.
Old 01-07-2009, 06:03 PM
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2.8 on the 42lb injectors is probably a bad idea.

Kevin
Old 01-07-2009, 06:07 PM
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A 2.8 on 42.5's are a bad idea esp untuned, don't cheap out. Have the belt and everything?
Old 01-07-2009, 06:08 PM
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Tune or boom.
Old 01-07-2009, 06:31 PM
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Def. tune.....60's would have been better than 42's, 2.8 plus 42's is not a great idea, but it will run. Have to have a new tune for bigger injectors and pulley though to answer the question.
Old 01-07-2009, 10:56 PM
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2.8", 42.5#s, and tune = eventual meltdown if you consistently take the car above 5500rpms.

any injector change without tuning = bad

Either trade in the injectors for 60#s, or trade the pulley for a 2.9" or 3.0"

Last edited by Bika; 01-08-2009 at 03:22 PM.
Old 01-08-2009, 02:00 AM
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haha toon for sure
Old 01-08-2009, 02:03 AM
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2.9 would be the lowest i would go on 42s, and i wouldnt ever even start my car untuned!
Old 01-08-2009, 06:33 AM
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lol at some of the above responses.

OP...Yes it can be driven. You should not take the car to wide open throttle though. It will run extremely rich and probably misfire, but it will not blow up any time soon. The worst it will do is foul plugs and contaminate your oil with gasoline. If you keep it under light throttle and cruising conditions it will not run rich until you put the pedal to the floor. The o2 sensor will keep the air/fuel ratio in check until you go wide open. You will throw a check engine light however.
Old 01-08-2009, 06:44 AM
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Send back those 42s and get 60s

Do you have any cooling mods yet?
Old 01-08-2009, 09:59 AM
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like everyone has said (42#) injectors are no good with a 2.8" pulley. Your IDC will be off the charts. Get (60#) injectors and a custom tune. Don't blow up your engine. If you don't have the funds or connections to get tuned, wait until you do !!!! <- I can not stress that enough ....
Old 01-08-2009, 12:48 PM
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Originally Posted by HackAbuse
Send back those 42s and get 60s

Do you have any cooling mods yet?
no, i dont have any cooling mods yet
Old 01-08-2009, 03:00 PM
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Originally Posted by chaosic
no, i dont have any cooling mods yet
get some.

Originally Posted by Witt
lol at some of the above responses.

OP...Yes it can be driven. You should not take the car to wide open throttle though. It will run extremely rich and probably misfire, but it will not blow up any time soon. The worst it will do is foul plugs and contaminate your oil with gasoline. If you keep it under light throttle and cruising conditions it will not run rich until you put the pedal to the floor. The o2 sensor will keep the air/fuel ratio in check until you go wide open. You will throw a check engine light however.
so all in all.... its just not a good idea to do unless you are tuned

Last edited by MBMCustoms; 01-08-2009 at 03:00 PM. Reason: Automerged Doublepost
Old 01-08-2009, 03:03 PM
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1) Take the 42s back and get 60's, 42s get nearly maxxed out easily

2) From what I've learned, you can kinda drive it, but get the tune asap/end thread
Old 01-08-2009, 03:11 PM
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Originally Posted by Scythe_Snake
1) Take the 42s back and get 60's, 42s get nearly maxxed out easily

2) From what I've learned, you can kinda drive it, but get the tune asap/end thread
x 2
Old 01-08-2009, 03:13 PM
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I think my questions have been answered.... have a tune set up in a month...thank u all
Old 01-08-2009, 03:16 PM
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install right before the tune. you will be doing yourself the favor
Old 01-09-2009, 07:34 AM
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Originally Posted by chaosic
I think my questions have been answered.... have a tune set up in a month...thank u all
good luck buddy let us know how you make out with the balt
Old 01-09-2009, 10:13 AM
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If you are in the market for 60's let me know and i will take care of you
Old 01-09-2009, 10:18 AM
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Originally Posted by Witt
lol at some of the above responses.

OP...Yes it can be driven. You should not take the car to wide open throttle though. It will run extremely rich and probably misfire, but it will not blow up any time soon. The worst it will do is foul plugs and contaminate your oil with gasoline. If you keep it under light throttle and cruising conditions it will not run rich until you put the pedal to the floor. The o2 sensor will keep the air/fuel ratio in check until you go wide open. You will throw a check engine light however.
to the op, basically what he's saying is you can put it on, but you won't be able to run the car hard. which defeats the point of doing the mods.

best bet is to ditch the 42's and get 60's and a tune. you will be able to drive wherever you have to go for the tune, but like stated take it easy on the way over.


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