Open-Loop Cam Test Dyno Results

[Justanothermike]

*****1/25/09This car is for sale again. This time for sure or will be sold on craigslist locally. [email protected]
https://www.3geez.com/forum/showthread.php?t=53419

I know some of you guys have been waiting for this for a while and i personally have been too. So we finally dynoed the rebuilt motor and did a little cam test as well. We dynoed our race cam first and then our Mild 256/270 cam. Run#9 is the Race cam and #13 is the 256/270. The race cam topped out higher and torque didn't die off as fast, but the mild cam killed it in the bottom end. Torque was a good 10lbs/ft higher all over with the mild cam. Those of you who were fortunate to get ur hands on our 256/270 cam got an excellent cam which passes CA smog as well!

A20a3
Standard Ph4 1mm overbore pistons
Stock Rods ARP rod bolts
83.7mmx91mm
Stock valves/springs/retainers
Welded Combustion chambers, P&P head (around 10.5:1 CR)
P&P B16a intake manifold
63mm overbored LS TB
8lbs custom aluminum flywheel
Custom aluminum underdrive crank pulley
256/270 cam or race 289 cam.
Golden Eagle Cam Gear
Obd 1 conversion
Chipped P75 Ecu
290cc Prelude OBD2 injectors
B&M fuel pressure regulator
MSD 7AL2, and blaster coil
DC sports Header
Straight pipe with 2.25 exhaust

The race cam


The 256/270 cam


The master mechanic at work


And there are some videos on youtube here:
http://www.youtube.com/profile?user=MrMike8300

i'll post some more pics of the engine while it was being rebuilt a little later since i think they got deleted from an older thread. There some here and yes this car is going to be for sale.
https://www.3geez.com/forum/showthread.php?t=53419

[Busted_Blue]

nice mike!1

[ghettogeddy]

the numbers for The 256/270 cam seem to be way better then the race cam almost 10 more flb of torque

witch one feels faster to you

[snoopyloopy]

10 ft/lb of torque in a built motor. but what about us little folks running i/h/e? how would this cam compare to the delta 272 and colt tri-flow? and how will it hit the pocket?

[wprocomp]

awesome man great power from the A20

[ICEMAN707]

wow that's some nice power coming from a non-vtec honda engine. is that mild cam good for boost too? 250hp would be perfect for the street with around 210-ish ft/lbs of torque.

[MessyHonda]

wow that is hot....can i please see your car in person? im in san mateo.....

[Legend_master]

All motor A20 is pure sex. Nice build, and I bet that car pulled like a SOB?

[Justanothermike]

the numbers for The 256/270 cam seem to be way better then the race cam almost 10 more flb of torque

witch one feels faster to you

the mild cam is deffinately a better all around cam. With 130+lbs/ft of torque from 3K up u can take off from just about anywhere in the rev range. This cam has very useable power.

[rjudgey]

Are WHP figures? I'd say that your Race cam is causing a bottleneck in the engine trying to let too much air in and can't get the exhaust gas out quick enough, had same issues with a 285 degree camshaft i have which i've used in some of my engines, switched to the 272 degree and wham way more torque and loads of bhp at a lower rpm. I think if you seriously what some good extra power you need to be looking at some bigger valves, 33mm inlet valves and 37mm exhaust valves, and then maybe look at Eagle rods as stock ones tend to break at the neck with 180+bhp with and engine that revs 7k plus rpm with forged flatop pistons with custom 3 valve pocket reliefs in crown, then next phase ditch the plenum and switch to ITB's which should see you good for 200whp or very near to it as you have to have a CAT maybe 10hp less than what i can achieve. With the inlet and head opened up you should see a power band of 5-8.5krpm maybe upto 9k rpm depending on whats been done to your head.

Stock rods and bolts are fine upto 7.5k rpm use but should be replaced every 20k miles to make sure they don't go through the block!!

[bobafett]

Awesome number! Congrats to Mike and Daryl. What does this car run in the 1/4 mile?

[2ndGenGuy]

Sounds sooooo good!

Sorry to be a stupid noob, but what are PH4 pistons? I'm guessing that they're some sort of Integra pistons or pistons from another engine that fit... That's how you got the higher compression?

Maybe you could point me to a thread on this... I searched the site already to no avail... Thanks!

[88LXi68]

Wow...I am really impressed and very happy you guys are still playing with the Accord.

Congrats on the numbers!!

[bobafett]

I am pretty sure they welded the combustion chambers to increase compression.

https://www.3geez.com/forum/showthread.php?t=53419

[shepherd79]

very nice numbers. I do have to agree with rjudgey that on race cam the stock valves limit the power big time. just from that dyno run you can see that it can do a lot more.

i like the numbers for mild grind too. very impressive.

PS. i have to finish OBD1 conversion.

[Cheeseburger]

very nice, good to see u still have the accord! i wonder what kind of #'s it would put out on the track

[2ndGenGuy]

Welded the combustion chambers? So you mean that's not the shape of the stock A20 head? Only allowed enough room on the head for the valves and spark plug... Pretty interesting stuff. Guess I'll have to look at the one I've got out in the garage...

[BITESIZE]

164 horsies aint too shabby!!!

[bobafett]

click me

normal shape

[rjudgey]

who's head is that?

[2ndGenGuy]

Bobbafett:

Thanks for the info. I totally noob'd out on that one. I see how he did it now. Pretty amazing work on that...

[rjudgey]

Trouble is what you gain from increasing CR ratio from welding it up you loose in having a poor combustion chamber shape, the head is barely skimmed as well so you could see even higher CR ratio with 1mm removed from the head surface. What probably woul dhave been better would have been custom pistons with a slightly raised crown some decking and head skimming would have seen high CR ratio but obviously at greater cost where as welding up the head would be easiers and cheaper to do. Would be interesting to see what kind of power it would really put down if the FI setup was ditched and a good old pair of Weber 45 DCOE's were bolted up and tuned to the engine i reckon you'd see at least another 20bhp with the wild cam thats if the dyno is in bhp and not whp if it's whp you'd be hard pressed to get another 10bhp from having webers maybe 15-20bhp if you had ITB's.

[bobafett]

who's head is that?

the head that is welded is mike/daryls from openloop obviously...
the 2nd head with the valve grind is mine...

http://a20turbo.com/features/chris/

[AccordEpicenter]

solid work mike, i always wanted to see a cam dyno on an a20. I have to say this is probably the most impressive NA A20 builds ive seen, it does great for what parts its got into it. I bet the car could run much faster than a 15.5 1/4 too

[EricW]

Nice work.