I was under the impression that with a S/C acceleration would be very smooth, like riding a big ol V8 auto, however, when I mash the gash in a higher gear at lower rpm (say 3rd gear at 30 mph) the car feels like it builds power in "bumps" until you get a lot of boost coming on. It's like 3 stages to acceleration if you know what I mean, it's not one smooth roll to redline, albiet it's not exactly jerky or too noticeable either.

Anyone else to relate with this?

Ryan

 

maybe because you mashed the gas on the wrong gear(too high). it happens to me too if i do that, but if i downshift its not there.

 

Hmm can anyone else confirm this? The car lunges a very tiny bit when the boost builds to near max..

 

Hey bro I have no idea where you came with this "feeling like a V8 auto" but boosted cars don't work like that. Aspecialy a manual!!!
Our superchargers stack air on top of air on top of air to build pressure.
It takes a little bit of time to build pressure. That's all it is.

P.S. If you think that's bad, try a turbo!

 

Yah i feel the same thing, you just have to learn how to drive the car. Personally I was not used to such a wide powerband coming from a V6. The car likes to be in the 3500-4500 rpm range when you mash it, at least thats what ive found.

 

Yeah I notice it too. Its normal though, the faster the engine spins, the faster the SC will spin hence more power. I dont remember the exact rpms but there is a point where you can feel an extra boost in power.

 

well i have been expieriencing a glitch once in a while right around 6500-6700 rpm, thats only cuz im runnin an intake and 2.85 on a stage 2 tune, gonna have that all fixed with hp tuners. other than that my car pulls like a biach.

 

here's your problem... if you're gong 30, there's absolutely no reason to be in 3rd gear...

 

30 in 3rd gear will put you right around 2k rpm. You'll feel some pull when you gas it, but the engine won't really wake up till get get moving around 50mph (little over 3k rpm). From 30 to 50, I can see that kind of choppy acceleration, but from 50 to 100 in 3rd should be a nice, smooth surge.

 

When I spoke to my dealer about the same problem he said that the s/c doesn't kick until 3500 rpm so yeah it does like it a little high.

 

not to jack this thread, but i read somwhere an intake throws off the af ratio, so the slight glitch/hesitation is from the intake right, now im gettin a lil worried lol.

 

Yes it is leaning out a tad.

 

its so annoying lol

 

My SS/SC accelerates fairly smoothly. A 3rd gear romp at 30 mph will not help. Maybe you were chugging? Maybe your belt is slipping? Just so you know our style of SC delivers power in pulses. Maybe this what you are feeling? Try a 2nd gear romp at 30mph and see if feels different. If it is still acting the way you describe take it to the dealership. If you have a CAI you may want to consider HP Tuners. You may be getting a "hiccup" due to low A/F ratio.

 

thats the next thing on the list, it hiccups, then it proceeds. i talked to the guy who is gonan tune my car and told me this is common and hes gonna fix me up nice.
belt isnt slipping, boost stays up, this also happens at low rpms too if i mash it, not all the time though.

 

Great, I figured it was the S/C building power in "stages", that's what it feels like, 3 - 4 small little jerks of power, not tremendously noticable, but you can feel them a little bit.

I had a V6 auto before, and it hesitated, I absolutely HATED hesitation and I wanted to just make sure this wasn't the case.

BOOO V6's, BOOO Autos! So glad I got rid of that 99 Cougar!

Ryan

 

Yeah, I was expecting a little less of a powerband, but overall it's not too bad for a 4 banger. A pulley helps a little bit with that, but I think mainly it's due to only have 4 cylinders combined with our cam profile.

 

all cars have issues trying to move when in a high gear at low rpm. Just like the evo that lost to the fiat. As I understand it NA engines have the ability to produce much better power in lower rpm's than most forced induction cars.

turbo ftw ... or maybe not

http://youtube.com/watch?v=uqY5ghXIBFE

 

That's exactly what I was thinking...

 

If you are mashing the throttle @30 mph in 3rd gear you are boging the engine real bad. If you were to do the same thing in a V8 you would end up with a similar debacle.

 

Little insight...

Lets say for example...

A 400hp motor doesnt make 400hp from 1rpm to 6000rpm... Power is always linear...

 

i agree i feel like the car is going slow and then all of a sudden it starts getting more and more it must be bc i am not used to it becasue i used to drive and automatic gtp and it was A LOT different in my opinion i liked it better

 

auto cars do just what they are designed to do, think for the driver. The auto will change gears to suit the speed so that you can actually move. Many cars would still change gears even if you selected one from the shift stick. You just need to think for the car instead of letting the car think for you.

 

^^^+1

if you're in the appropriate gear, and floor the car, it should move smoothly... 30 mph in 3rd is not the appropriate gear... downshift to 2nd, floor it, guaranteed you won't have the same "problem"

 

I think you just need to get used to the fact that you're driving a 4 cylinder stick (no offense). These cars are not going to have the low end torque that the supercharged 3.8's have or that a V8 has. These 4 cylinders LOVE high rpms. Even if you have a V8 or a car with alot of low end torque (GTO for example), if you have it in too high of a gear at a low speed, the it feel like you're bogging it.