silverTTpa

I need a few searches here on AW and Google so I think I understand the process of cleaning and opening the intake channels to the each cylinder if my laymen terms are correct.

I also came across this table that Kareem posted back on (7-25-05)

He mention that these were before and after( Extrude Hone) reading on the intake of 911/SC Carrera and the principle would be same in our cars?

Cylinder/Stock CFM/Ext.hone
1 197 322
2 313 335
3 227 331
4 197 348
5 313 339
6 233 335

I understand the bigger number is better and they are more even so is this air volume going through the intake. One thing that I notice is that there was no mention of changing out the throttle body ,,,isn't this unit that's mounted between the intake hose and intake manifold that has a lever inside that controls air flow as we step on the gas or I'm I out in left field? I would have to presume that changing this unit wouldn't be of much help if my understanding is correct.

I'm just trying to see if I have a mental picture of want is happening with mod.

Thanks
Ken

RedRoadster

Correct, the throttle body isn't altered - you send in the manifold by itself. I organized a group by on these two years ago, so you've probably seen some of my posts. Is there anything else you wanted to know? Not sure if there was another question there - you can e-mail me, too.

TTschwing

Though those particular numbers don't look familiar. I think it was an overall 13% increase in CFM as I recall. ZGTT (search) had his TB ported as well as his manifold by Wilson manifolds in Florida. Results were comparable and cost was higher. The TB porting has to be done by hand and not suitable for the EH process. I would doubt (The EH) it would be very effective on a 911SC primarily because the runners are very short, and it is difficult to milk more out of P-car motors with small tweaks like this.

silverTTpa

Will do thanks

silverTTpa

Thanks, looks like a nice option for a 180

MCPaudiTT - DEFCON 1

a bench, push (or pull) more air through the manifold. The increase in flow does not equate to a corresponding increase through your manifold - if it did, you would see a much larger HP jump than you actually see. Instead, it indicates that air will encounter less resistance in the manifold, and at best a slight increase in flow will be achieved. It's a pretty arbitrary way to test it, but better than nothing.

MOBlueTT

Steve, that's correct 13% overall on EH - balanced all 4 runners for volume!

migo1980

Ill be setting up a group buy after H20 email me if interested.