This is on a F22ax head. Will be using a pretty good cam and around 10-10.5:1 comp. The numbers looked and sounded good to be but would like others inputs. Here are the numbers:

intake exhaust
.050 45 41
.100 87 83
.150 127 121
.200 163 150
.250 191 172
.300 218 186
.350 241 198
.400 261 211
.450 276 215
.500 288 218
.550 296 221

I know I will never use the .550. The max lift of the cam is around .480. But The shop flows every thing to .550. He will also be using a manometer to check to volacity of the air coming through the head as well. I will post that up soon.

 

Well generally searching for flow numbers of highly developed B-series port work will give you an idea of where your F22A head sits. Example:

https://honda-tech.com/zerothread?id=2134320

It seems that for the most part you are slightly ahead of a nice PR3 casting with a snazzy portflow job. Considering your F22A might have approx 10%-20% more displacement than a run-of-the-mill B-series with comparable development on the induction systems you should be able to get at 10-20% more power than said B-series. Of course since it's nonVTEC if you spec a camshaft with operating RPMs that of a B-series VTEC engine your drivability on the street will suffer dramatically.

Is there a reason you intend to run 10:1 compression? Attempting not to use premium fuel or is that the resultant CR after flat faced valves, a mill and a 1 layer head gasket?

Pirate

 

Thanks for the link. Comparing the 2 heads it looks as though these look better then I tought.

The motor will be using TSX pistons in it and 2 layer factory head gasket. If I did th math right (probable didn't) it should be about 10-10.5:1. If its higher around 11.5:1 or so that would be great.

This is also on a F23 block.

Thanks for the input pirate. I always welcome your feed back and follow your builds. You know ALOT more about the inside of an engine then I prob. will

 

Excellent test, turbowa!

My base numbers are within 2% of what you have shown. Pirate also hit the nail on the head: a stock F22A out flows most street ported B-series heads.

Goodluck with your build, and let me know if you need any technology!

 

I think you're probably approximately right on the compression ratio. I don't know specific ccs of your parts so there's always a good margin of error.

Is your cam going to be the Bisi hard welded cam? Are you going to make a build thread? I'd like to see the torque curve of a Bisi cam if that's the case.

I don't know very much about engines. Just enough to be dangerous. All you have to do is waste a lot of time reading and you learn a little now and again.

 

Thanks guys. I will try and put together a build thread when this is all said and done.

Bisi, I orderd a custom level 3 hardweld from you w/ springs and rocker spacers.

If the torque curve is anything like the one I got from his level 1.5 regrind on my F22b2 it should be really good. The little poor F22b2 was able to get 134hp and 142lb/tq with basic bolt ons and hondata s300.

Right now at work were REALLY slow, so I have alot of time to read and try and learn.

 

always heard good things about f22a's ability to flow.. those numbers look awesome!

its scary to think, how much a good valvejob and portwork could do to those heads