Honda Car Forum

Ok I have a 1993 honda civic hb with a b18a1 block and a p72(gsr) head. With this setup the compression is raised so that means hp is raised too. Also the block was rebuilt with high compression weisco pistons. If anyone can give me an estimate on how much hp i have i would really appreciate it. I am going to go get it dynoed just not no time soon. I'm curious cause this car is really fast. Everything is stock on the car but i added a cold air intake and an aftermarket aluminum radiator. Thanks.My compression is 12.5:1

I guess 155 hp

It doesn't matter how much hp you have because you will never compare to any American Muscle Car.

5% over stock.

you must dyno it, its the only way of telling its true hp

I have witnessed alot of dyno sessions...I would guess around 150-160 whp.

Horsepower is an arbitrary number when it comes to a car that has only modest modifications. Power to weight ratio and torque is what you are looking for. To say I'm going to add a K&N air filter (Advertised at 5-7 horsepower typically) and add headers (typically 10 horsepower) is in a best case scenario where the air flow is maximized from the intake throughout the exhaust port of the heads through an unrestricted exhaust, and a high flow catback with high flow mufflers. If any aspect of the system is not structured to maximize air flow you will not achieve these generic numbers you are looking for. Increasing torque and removing unneeded weight will help in improving acceleration. But to know for sure you have to dyno the motor. If the motor is in the vehicle you'll get 2 results, one will be HP genereated by the motor at the flywheel and an estimated amount of HP at the wheels, which will take into account loss of power through friction

I think 175hp.

It would be helpful if you would tell us the compression ratio. But a stock ls/vtec...which is unreliable pushes about 180-190hp at least (to the crank), if tuned and built properly.A GS-r wouldve been more reliable and cheaper to swap than an ls/vtec.I find it odd that you used a B18a block instead of the B18b. Oh yeah, and intake and radiator wont do anything powerwise for you. Intake might give you 2-3hp at the most. But it'll surely give you more sound than power.Remember, power is nothing more than the product of torque and RPM. Hondas make power through high RPMs, not torque. LS/VTEC increases torque, but limits the redline.Edit:A 12:1 compression ratio isnt possible without running 110 octane. Or a mix of 91/93 octane with a high octane race fuel to hit the desired octane level.

From my experience I would say you have about 160HP and maybe 145lb ft of torque. And when you say fast have you actually ever beaten an American V8 yet?