CAI and remove CAT - How much horse power?

[Hondan]

How much horse power would I gain if I removed the first catalyst and add a cold air intake on a stock D17A? ES3 Type RS

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[lowlife9]

lol maybe 1-2

[baron340]

You may gain a maximum of 2 hp and you will likely lose 5 ft*lb of torque.

[greeen01civic4d]

u will gain 1 million hp

[Awjvail]

Over 9000.

[ProjectMayhemR]

who cares, a slow car is a slow car... and you sir have a slow car.

[turbo zombie]

a few years ago one of the import magazines did a test on the power difference between a stock cat, a high flow cat, and a test pipe (no cat). the vehicle they tested was an already highly tuned R34 skyline. the baseline test, with the factory converters, was somewhere around 540 whp. the high flow cat gained i think 2 hp. the test pipe only gained another 3 or 4.

on a race car, that can matter. on a stock or mostly stock civic, that's more legal and environmental risk than is worth the reward of 1-2 hp. your car would be noticeably louder, even with a factory exhaust. modern oem catalytic converters do not restrict flow a significant amount.

see my sig, my 242 turbo made more "butt dyno" power with a factory cat and a straight through muffler, than with no cat and a stock muffler. it was quieter that way as well.

[04 Honda Civic]

You can probably keep up with evos

[Hondan]

Originally Posted by 04 Honda Civic

You can probably keep up with evos

With turbo added, driving on race gas.

[civicsrcool]

Originally Posted by Hondan

With turbo added, driving on race gas.

you need some nawz too :/.

[Jp7]

the advantage of taking away a converter is the fun fuels you can use without having to worry about ruining it.

[turbo zombie]

yeah, but again, what kind of help is that going to be to a stock ecu'd civic? fun fuels are only fun if you tune for them.

[Hondan]

Originally Posted by turbo zombie

yeah, but again, what kind of help is that going to be to a stock ecu'd civic? fun fuels are only fun if you tune for them.

Whst kind of ecu work can I do?

[slowassd17]

you cant really do anything to your stock d17 ecu, you could buy a piggy back ems or hondata kpro, but if you dont have any big plans for the car, or plan on spending a decent amount of money then it wouldnt be worth it

[Hondan]

Originally Posted by slowassd17

you cant really do anything to your stock d17 ecu, you could buy a piggy back ems or hondata kpro, but if you dont have any big plans for the car, or plan on spending a decent amount of money then it wouldnt be worth it

Ok instead of adding a turbo kit, I am going to sell it and
buy a FD2 SI and add a FD2-R spoiler to it and a few other upgrades.