Okay so just recently I ordered some pacesetter headers and a vibrant catback exhaust and had them installed. I also already had a short ram intake already installed beforehand. I also just got my RKsport lightweight crank pulley delivered yesterday!

I am going out to grab the smaller belt for it tomorrow before install begins. My question is with these few mods (including the crank pulley) how much horsepower do you think I gained from the stock 140 Hp my car supposedly came with? (2003 2.2 Eco Cav Stndrd)
All cars are different but a good guess would probably be just under 140 on the dyno.
But that would be the same as they say my car came with stock? Or do they inflate that number a bit?
he is talking about 140whp, the 140hp you are talking about is engine horsepower. I'd say your around 135whp.

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I think he means wheel HP as opossed to flywheel HP. The dyno measures how much power is getting to the wheels, not the crank. Thre is typically 10-13% Power loss from the power that is made from the crank as it transfers to the wheels, ie 140HP at the crank with a 10% loss is 126 that is making contact to the ground. Thats what a dyno meaures
The 140hp stock is at the crank not at the wheels. Stock wheel hp would be around 125-130ish
Sorry guys didnt see JoeyDaBomb and jd soza post before I wrote that....
dyno the car after parts installed. thats the only real way to tell

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If i was you i would get a lower motor mount and an upper motor mount. The lower motor mount should be installed with headers to avoid rubbing. I had a set of headers that couldnt be installed because the bolts were rusted out so bad, but i still have the lower motor mount installed on the car and it makes a great difference on the acceleration and torque. I haven't installed the upper motor mount but i have one coming. The lower motor mount will help the horsepower get to the wheels so its actually being used instead of wasted. The only bad part with the mounts is vibrations in the cabin, but they really arent that bad, and its all about performance right? Trust me, if you would buy motor mounts, you will not regret it. Why have horsepower if its only going to waste. Mounts should be one of the first mods installed so that all the other mods aren't useless. Hit up neaa for them motor mounts, they are very reasonable and a definite DIY.
- 2003 CHEVY CAVALIER LS SPORT ECOTEC -
- Current Mods -
-- Vibrant Exhaust & DC Sport Header --
-- Lower Motor Mount & TTR Upper Motor Mount --
-- B&M ShiftPlus & Vibrant Front STB --
-- K&N Typhoon Short Ram Intake --
RIP DAD<3 We love & miss you so much!
NEAA
- 2003 CHEVY CAVALIER LS SPORT ECOTEC -
- Current Mods -
-- Vibrant Exhaust & DC Sport Header --
-- Lower Motor Mount & TTR Upper Motor Mount --
-- B&M ShiftPlus & Vibrant Front STB --
-- K&N Typhoon Short Ram Intake --
RIP DAD<3 We love & miss you so much!
Tthe 03-05 J-body Ecotecs usually dyno about 121-128(bone stock) -depending the tranny. The LD9 powered J-bodies usually makes about 125-135whp(bone stock) depending on the tranny & year.
So with the mods that been added - 140 whp sound like a good guess. naturally it may be slightly higher or lower depending on the dyno.
Keep in mind - 140whp translated to about 155-160hp at the flywheel with a manual tranny.
Thanks for the answers appreciate it!
So a LD9 is better than a ecotec?
GMR has got nothing on this
DOHC_tuner wrote:So a LD9 is better than a ecotec?
Oh no let's not get this argument going again

15.2@89mph 2.171 60ft. 9.830 1/8 R.I.P. "LULU"
DOHC_tuner wrote:So a LD9 is better than a ecotec?
and who said that??

Im a Xbox 360 fanboy...and damn proud of it!!