So far i have a sri and magnaflow catback exhaust. suspension wise i have a strut bar and a rear sway bar put in.

when acceleration quickly in my lancer i've noticed that it takes a while to kick in. If you floor it there is like a slight pause and then the engine revs into gear but rather slowly. I figured this has to do with multiple things, one being the horsepower.

I was considering going with the piggy back ecu upgrade and throttle bodies next. Is that going to make any difference as in making it rev quicker into gear?

with the piggy back ecu is it a must to use 91 octane?

 

yep sure is!

Good chice on both of those mods.

 

I don't normally hear of a delay in throttle response on an SRI, what brand is it? But yes, I think the piggyback will help that, and yes you have to run 91+ octane with it. Stil the best mod I've ever done though.

 

Throttle response has nothing to do with horsepower. What you're feeling is probably sluggish throttle response. The relatively small inner diameter of the throttle body and the fact that the throttle wire has some slack in it from the factory can both lead to sluggish throttle response.

There are two easy ways to improve throttle response and one of them is free.

1. Buy a bored throttle body. RRM has them readily available last I checked for around $270 w/ core exchange. That's what I paid 2 years ago. It may be different now, but I'm too lazy to check.

2. Tighten your throttle line slightly. Don't pull it TIGHT, just take a little of the slack out of it. If you tighten it to the point that the butterfly never reaches the full closed position you'll be hunting at idle CONSTANTLY and will probably stall. The IAC function will never know what the hell is going on and you'll probably throw a CEL and/or stall frequently.

 

maybe you need little more back presure from your exhaust.

 

If you want acceleration between 1,000 and 3,500 RPM's go with the throttle body and intake manifold. If you want acceleration between 3,500 and 6,200 get a header and the piggyback. The piggy back will only really help you in the 3,500+ rpm range.

 

it's because of the auto tranny

 

I disagree. The car tends to run lean in the low end and rich in the high end. The piggyback adjust both of those numbers. The majority of the gains achieved from the piggyback are 2000-3500 rpm and 5000-6200 rpm. That's according to a number of dynos I've seen, including mine.

 

wow, rklancer, i dont know if you learnd anything but i sure did! I love the tech stuff, thanx Urban and Hobie keep the info coming

 

i agree PG999, thanks guys for all your help

 

you know i was driving home from work yesterday and i was getting on the freeway and i had this same problem when i tried to speed up it paused for asecon like it didnt want to go so i floored it and it just took off but i didnt have that problem any other time since then or before that

 

thats why this car is scary when your trying to beat the traffic light

 

Only lack of acceleration I notice is under 3500rpms, after that it seems to go pretty good. As for the sluggish responce, I notice an improvement when I took some of the slack out of the throttle cable. I know the piggyback is on the top of my list of stuff to get.

 

Turbo or supercharge is the only solution to speed up and beat traffic light.hehe

 

that's exactly why. every auto i've driven it's had this to one extent or another, except for my friends mercedes.