Re: just a question
always revin said:
I know it might be LAME ,BUT HERE IT GOES mods i have aem cold intake,advanced tim.unorthodox pulleys full set (3)Dc header 4-2-1 well how much do u think i gained with this set up?I was thinking like 6 to 7 hp thanks for the comments.
6 to 7 HP would be a reasonable assumption. Not all bolt-ons are going to have a positive effect thru 100% of the powerband. The only way to really know how your engine responds to any mod is to dyno tune it and the before and after results will be conclusive evidence.
The stock B16A engine is factory rated at 160HP. Flywheel horsepower that is. I have read numerous articles on tuning where they did a baseline dyno before doing any mods and more than once the stock engine was putting out roughly 147HP to the wheels. If you calculate the loss thru the drive train, usually about 15% for a manual transmission, that gives you almost 170 flywheel horsepower.
There has been a lot of speculation about this number and why Honda might have de-rated the engine. One possible reason is because of the GS-R at the time was only rated for 170HP. It doesn't look too good to have a 1.8L and a 1.6L engine pushing out the same amount of power. The GS-R vs. the Si/SiR has been argued till exhaustion here. In the end, on the track, they are both fairly equal cars, coming down to the driver.
Another drastic effect on the B16A is the outside air temperature. On really hot days the B16A has a noticeable power loss because of the inlet air temperature. Colder air is more dense and thus provides more power during combustion.