[hmotes]

during these 2 gears my car sounds like it's starving for air after 2000 rpms. Once I hit 3rd it feels much better and smoother. My car is stock execpt e-cam and 1.6 roller rockers. Can any one help me? It's killing me at the track and the streets.

[03svtsnakevert]

Originally Posted by hmotes during these 2 gears my car sounds like it's starving for air after 2000 rpms. Once I hit 3rd it feels much better and smoother. My car is stock execpt e-cam and 1.6 roller rockers. Can any one help me? It's killing me at the track and the streets.

When you changed your cam, did you change your MAF and injectors (generally to 24lb with a calibrated MAF)

[1slo5.0]

Originally Posted by hmotes during these 2 gears my car sounds like it's starving for air after 2000 rpms. Once I hit 3rd it feels much better and smoother. My car is stock execpt e-cam and 1.6 roller rockers. Can any one help me? It's killing me at the track and the streets.

Why do you think its starving for air?

[hmotes]

thought you didn't have to change injectors until you atleast hit 300 rwhp.


well 1st and 2nd sounds like it boggs after 2000 rpm so I figure it might be air issue. once i hit 3rd it smooths out and everything is fine.

[Screemin3o2]

hp isn't really related to the size injector you need, but still I highly soubt larger injectors would do anything for you with just an e-cam. Its a fairly mild cam and if you still have the stock heads so you are not getting enough airflow to need bigger injectors.

You have described this like you are only hearing it. "my car sounds like it's starving for air after 2000 rpms." and "well 1st and 2nd sounds like it boggs after 2000 rpm", how does the car actually feel.

[hmotes]

i say that cause it gets loud and the car feels rough like its bogging at WOT after 2000 rpms. its hard to describe. it gets loud as the rpms raise but isn't really moving fast and a slight vibration. feels rough like its starving for something. but once i shift to 3rd everything smoothens out.

[Screemin3o2]

what year and model is your car?

[Tony_90fox]

this probably doesn't sound right, but my car was doin that one time at about 3000 rpms, and the car had a ticking sound to it. i thought it was an exhaust leak, but i changed my oil and all problems went away...even the bogging when on the gas. like i said, your oil is probably fine, but i would at least check it.

[hmotes]

it's a 91' gt. i've changed the oil. tried putting 93 octane, changing timing. don't know what else.

[Screemin3o2]

well it's not an immediate simple thing you can try but next time you change your oil, replace 1 quart of the oil you would normally put in with 1 quart of transmission fuild. Tranny fluid has much stronger cleansing agents and has the ability to break more things down and at a quicker rate than engine oil. You just don't want to put more than a quart in their because then you chance breaking down too much sludge, etc. that is inside your engine at once and causing damage. Some people might tell you that I am full of shit or that you will damage something but I have literally seen it work without it causing any damage what so ever.

But that still doesn't explain why it isn't a dog in every gear. I am somewhat stumped on what to suggest just by reading your complaints and not actually getting to drive and look at the car.

[Tony_90fox]

it is hard to describe anything without letting a person drive the car or at least hear. I have had this problem many times. I dont know much about engines at all and everytime i try to describe something, i sound like a two year old. I feel you on that man!

[1slo5.0]

Originally Posted by 03svtsnakevert When you changed your cam, did you change your MAF and injectors (generally to 24lb with a calibrated MAF)

That is totally unneccessary. The stock 19lb injectors work fine up to 300+ hp and mid 11s.

[cali 5.0]

does the car have any idle issues?? did u put the pcv valve back in there correctly?

[Tony_90fox]

Originally Posted by Darrell Originally Posted by 03svtsnakevert When you changed your cam, did you change your MAF and injectors (generally to 24lb with a calibrated MAF) That is totally unneccessary. The stock 19lb injectors work fine up to 300+ hp and mid 11s.

Darrell, off topic but when should the throttle body and MAF be changed? Any certain amount of HP when you upgrade? If you are wondering, read my PM that i sent you awhil back about what i was gonna do to my car. What size MAF and throttle body would work best with that stuff.

[03svtsnakevert]

Well, I have seen that when you change to a more radical cam that the car will surge...and a MAF change with injectors is called for

[Screemin3o2]

the car only surges because you need a tune if the car is fuel injected or if it is carbed, you need a carb for what displacement the engine is and what rpm it is capable of turning, etc. Your induction system should also be setup to match your cam profile, that will always make it run a lot better. An e-cam is not a very radical cam and with a pretty much stock induction system, you will be able to make up for any increased airflow the cam creates with the stock fuel setup. If he were building a 347 or something with more displacement, then yes he would need higher output injectors.

[1slo5.0]

Originally Posted by Tony_90fox Darrell, off topic but when should the throttle body and MAF be changed? Any certain amount of HP when you upgrade? If you are wondering, read my PM that i sent you awhil back about what i was gonna do to my car. What size MAF and throttle body would work best with that stuff.

When you do heads, cam and intake would be a good time to do throttle body and mass air. When you do the mass air it would be a good idea to upgrade injectors since the mass air needs to be calibrated to the injectors so you have some room to grow in the future.

[hmotes]

Originally Posted by Tony_90fox it is hard to describe anything without letting a person drive the car or at least hear. I have had this problem many times. I dont know much about engines at all and everytime i try to describe something, i sound like a two year old. I feel you on that man!

yea thats how I feel

[03svtsnakevert]

it is better to have and not need than to need and not have

[Screemin3o2]

you don't need it until the airflow is increased enough to where you need it. It is better to not need and not waste your money until you need it I think. You could put the 500+ you spend on it towards something else. If you only have a mild cam installed you don't need injectors, the stock 19lb allow plenty of fuel.