Hello, i started a similar thread a while back but I deleted it because it got jacked by people answering their own questions instead of mine.....:

Has anyone been able to increase low end power in their vtec motor noticeably by doing mods that dont require machining or pulling the head, while keeping the motor Naturally Aspirated?

I have a stock 2000 gs-r with an icebox to be installed within a few days. I dont want nor expect to make my car a freaking powerhouse with the mods i want. I just want somewhat of an increase down low. If you have done some thing(s) to your car that you could feel down-low i would appreciate your input.

i know almost all products for integras are made to increase airflow(and power) for higher rpms...and i know my wants will be difficult if not impossible to attain. So dont tell me this, I dont want this thread to be filled with that crap, that keeps the post from attaining its goal. so If you do not have positive input please dont respond...

thanks in advance if anyone can help.

 

Seeing as torque and horsepower are directly proportional to each other, it will probably be bolt ons that will help. Definitely free your exhaust up and get a header through exhaust.

 

i added some msd spark plugwires and they helped my car out alot. it jumps off the line faster than stock wires.

 

The only bolt ons that might give you some amount of low end torque would be the inake manifold and the cold air intake. Shorter fatter runners on the ITR intake manifold increases air flow and gives decent amount of torque during mid to high range rpm. And the CAI gives more torque due to cooler outside air induction, it slows the rev a bit on the VTEC motors because it takes more time for the engine to inducts the air due to the longer pipe, but it also increases low end torque a bit.

 

Oh btw, stock exhaust system provides much better low end torque than the aftermarket systems, most aftermarket exhausts' power will only come at high rpm range.

 

The dual runner manifold of the GSR was designed to create low end torque. Shorter runnered single stage manifolds are better suited for high rpm power.

 

thanks for the input, this is a good start.

what about a reprogrammed ECU or that APEXI vtec controller.....can these be used for benefit on a mostly stock motor?

 

VAFC does nothing on a stock motor besides adjusting the VTEC activation point. You're gonna need cam gears, I/E/H, and have a shop tune it for you, or have someone else's VAFC setting with the similar setup.

 

Basically, what you are asking is "Can I get more torque without doing anything that would give me more torque?," so the answer is no.

The only proven way to noticably increase low end torque is to rework the engine to have a higher displacement. This means boring and/or stroking and a lot of cash.

Most basic mods done to small displacement engines increase the top end torque. That doesn't really help what you are looking for, sorry.

Ever consider an H22A swap?:dunno:

 

dont put a h22A in ur car.. just supercharge it