Here is the dyno graph from a month ago:

And the setup:
1995 JDM Prelude VTEC H22A Engine & 5spd Transmission w/ LSD
Head Milled 0.020"
Modified Intake Manfiold
Crower Stage 2 Camshafts
Imagine Engineering 4-2-1 Header
STR Cam Gears
STR 70mm Throttle Body
Walbro 190lph Fuel Pump
AEM Cold Air Intake, High Flow Fuel Rail, & Fuel Pressure Regulator
APEXi V-AFC
Thermal Classic Exhaust
Exedy Organic Clutch
NGK Spark Plug Wires & Platinum Plugs


Here is what I did:
JDM Type-S Pistons
Golden Eagle Sleeves
Removed Balancer Shafts
Manual Timing Belt Tensioner
Open Header

Here is the dyno from today:


I put the whole motor back together, then started it and check everything over. I went out and and went 50% throttle to 5000 rpm in 2nd and then 3rd, decel in 3rd and 2nd to 2500, repeated 2 more times. Then the same at 70% throttle to 6000 rpm repeated 3 times and then the same at 100% throttle to 7500 rpm repeated 3 times. I did that to seat the rings. I then drove back and changed the oil, and then drove around for just a little while before going to the dyno. I had 35 miles on the car when I got to the dyno and did 10 runs. The cam timing is +3 exhaust and -1.5 intake as it was before. Ignition timing is 17 degrees. I was running open header. A/F ratio was 13.0:1 to 13.5:1. I thought the squigily parts on the graph was from the 93 octane gas, so I put 100 octane Turbo Blue in and it smoothed it out a little, but is still noticeable. There is no blow by and I'm not burning any oil.

The machine shop broke my knock sensor, so I have a B16A knock sensor. Any ideas?



Modified by ranta18 at 1:42 AM 10/21/2003

 

Idea: Your rings aren't seated yet...Don't believe everything you read on the internet.

Do a leakdown test and see what kinda leakdown you have...maybe you had some shabby machining too.

Suprdave

 

If the compression and leak down are fine, what do you suggest? I am going to get some good break in miles today (500-800).

 

I put 700 miles on it (200 highway) and did 3 passes at the track. You can definitely tell the power and torque is gone. I did a compression test and it came out like this:
#1 200 psi
#2 200 psi
#3 195 psi
#4 205 psi

It isn't burning any oil and it doesn't look like there is any blow by. My dyno guy said that the intake cam gear might be off a tooth. The intake and exhaust both appear to be pointing straight up. However, the marks on the sides that are suppose to line up when the top marks are straight up are off by a tooth. It looks like the intake cam gear would have to be advanced (rotated counter clockwise) by a tooth. Think thats it?

 

200psi is around 10.5:1 Compression Ratio. You should be around 11:1 w\ Type S Pistons. Shabby Machining?

Post a pic of your cam gears...

Suprdave

 

Compression should be even higher then 11.1 considering you milled your head 20 thousandths. Your probably around 11.7-11.8

 

Turned out to be the cam gears. I messed around with them and got them to line up perfect. Compression is back up. Going to the dyno in a couple hours.

 

keep us updated. Im curious to see how it turns out.

 

My stock JDM h22 Put around 260 all the way across. Stock compression is 10.6 I think.

 

First thing after putting a motor together or back together is to check ignition timing with cam gears at 0. If you skipped a tooth at the cam gears, the ignition timing should be off a lot, like either 8-12 or 20-25.