Worth it.... maybe..
It depends on how far you want to go.

On a stock - stage 2 car... no, don't bother.
If your one of those guys going for a 2.7 or smaller pulley, or a TVS... yeah, it's probably a good investment.

The bottom line, is that porting should generally be viewed as a supporting mod, rather than a power mod.

Edit:
And as I stated earlier in this thread... head and SC porting is only part of the puzzle... the real restriction is in our intake manifold. In stock form, it flows 85% of what the head does.

 

Thats the plan... This was more of a setup to max the TVS thats on its way. If one never does show up... Then i guess it was to just max out the M62 and stick my finger up my ass. But either way I was hoping to feel some more power after it was done. lol

 

See my last edit, with respect to the IM.
I let the cat out of the bag a last week, in that I've been flow testing a ported version. It seems promising... less heat, more flow. In combination with a head porting it should free up some flow, and lower that boost pressure. Efficiency FTW!

 

Yea i know, I had PM'd u about that.

Actually, with all the talk in this other thread about the f35... I'm kinda 2nd thinking the idea of spending all this $$$ on power adders when the tans is the weakest link in the drivtrain.

 

Ah... that's right, you did PM me....

Actually, your right.... the drive train is a weak link indeed.
I've been inquiring with a local performance transmission shop about beefing up the tranny. I might have some info this summer sometime when I start to focus on that area of the car.

 

I need to go figure out my plan of attack again because Instead of the P&P on the head, i'll just hold off on the head work untill the trans has some more options.

 

please tell me you didn't tell him to hack the **** out of it too

 

If you wanna go that route, talk to Matt about who he has doing the TBSS trannys and whether or not they'd be interested in tearing apart ours to find out what needs to be strengthened.

I don't think it's as bas as people say, considering the fact that there are plenty of people in the 260-290whp range that don't have issues and a handful of guys well over 300whp that just have the Exedy setup...

 

Not to mention the turbo guys with well into the 300's...

 

****, I'm easily in the ~290 range and I'm still on the stock clutch; granted, I'm only at 22K...

 

well.... I'm only at 9K and when i race it, it slips a tad 1-2, and a tad from 2-3 (Not as bad)

I have the spec stg2+ clutch + Fidanza fly I might have to talk to him about the trans.

 

You shouldn't be having that issue. When you race it, is the car fully warmed up beforehand? Do you put a few miles on it before you start getting into it?

 

Well I drive it up to the track (40min-1hr) and I usually let it sit till the tepms from the car were around 140ish... (let it sit for about 30 min) But it was more or less my first manual car. I used to have a Man GTZ that I drove for about 4K so I'm sure my slipping in the cobalt is due to lack of experience.

 

I never told Cameron to port it SO big. he just thinks extreme is cool, because his always has to be bigger and badder than everyone elses. It just never ends up being that way! LOL!'


The only reason Gilbert ported his head was to accomodate the flow of the GT28R Turbo we put on the cobalt. The eaton doesn't really make enough flow to warrant the cost of a port job on the heads.

 

What was the outcome of the XETREME PORTING he did?

 

Are we talking about the guy who gutted the whole underside of the charger?

 

He blew his motor and it still sits ont eh side of his house almost a year later. Search Blown4banger build update.

 

ah yes. true. i still. to this day. give him **** about that.

mild porting and smoothing. not extreme stupid ****!

 

It sounds ******* orgasmic though

 

How did he blow the motor with the Porting? (Porting the head, S/C, or both??)

 

I think he blew a ringland

 

This is the whole reason I made this:

http://www.eatoninside.com/showthread.php?t=156

I never posted it on this forum cause there would be 80 internet engineers coming in the thread and telling me I'm wrong. Even though I got the seal of approval from Arnie at Eaton regarding content validity...

 

Good Info finally some good reasoning to back up the dos and don'ts of supercharger porting, i wish i would have seen this earlier, might have forced me to go out and get those silencer holes welded up when i was porting mine.

 

Eh, maybe I'll go ahead and carry that thread over here and see if I can get it stickied. It's already stickied on EI and Cobaltcoupe, I just didn't want to deal w/ the drama here...

 

Good **** Dubs! I m LOVIN it!