Around 2 to 5 horsepower,not alot. If you do install a cold air intake with a header on and get a high flow cat.You should be seeing around 10 to 20 hp all together depending which header you use,it ain't a much though when it comes to racing. You would only be half a second faster. The best resource for being faster is gearing and power to weight ratio.So lighten up your car (take stuff out the trunk that you dont need,check the psi on your tires) add a lightweight flywheel to the car.I say a 12lbs flywheel would be best because anything lower than that,the rpm's with spool fast but when it comes to shifting they would spool down fast beacuse of the lightness and take you off vtec,and then have to engage it again.(How do I know this, I have a 9lbs flywheel on my 93 h22 prelude). I'm all stock right know besides a lighten underdrive crank pulley and a 9lbs flywheel and I stay on the line with 02-06 Subaru WRX's (not Sti). With some bolt-ons I should be somewhat faster, so yeah a cold air intake should give you some ponies but don't consider alot. Also my advice to you is don't go out wasting money crazy to make your car faster as soon as possible.Take your time and do it slowly,whats the rush,progress slowly.
THANKS FOR READING
-CHRIS Q.
i have an 87 prelude si and mine will do 0-60 in about 4.5-5 seconds with a cold air intake.
Cold air intake is better because it's denser.
The honda Civic cold air intake works in a very simple style. It takes in air and then uses the cold air to cool down the car for a more efficient ride.
A quality made cold air intake system will add around 5 h.p.
Changing/altering the intake manifold, header, exhaust, and pulleys would yield you immediate improvements. The cheapest route to start is changing the intake manifold, from changing from a stock filter to a high performance re-usable filter all the way to a cold-air intake is one way. From there, changing the other components (header, exhaust, pulleys) will also cost more as you go along.
A leaking manifold seal on the intake will cause a popping noise on the 1996 Honda Accord. This can heard most clearly on days when the weather is cold because the seals tend to shrink.
0.004 intake and 0.006 exh. This is with a cold motor
The valve adjustment specifications for a 1987 Honda Prelude 2.0 (with the 2.0L engine) are typically set at 0.006 inches (0.15 mm) for both the intake and exhaust valves when the engine is cold. It's essential to ensure proper clearance to maintain engine performance and prevent valve train noise. Always refer to the vehicle's service manual for the most accurate and specific details related to your engine.
I would recommend putting a cold air intake in your es.
cold intake is 0.003 in or .07 mm cold exhaust is 0.003 in or .07 mm
.006" intake, .009" exhaust. Adjusted with engine cold.
.02 both intake and exhaust.