keep tryin! you'll blow it up good!

 

The RPM and AFR was cut off of the stock dyno because everyone already knows how rich it runs stock.

Both runs were done to 6500 to keep the results more comparable. Yes we could have run to 7000 but then there would be people bitching because we didnt use the same RPM.

The stock run ran well below 10 afr on the tail pipe sniffer thats why there is such a loss in power in the mid 5000's. After the mods the AFR came up to around 10.8 buy the top end but was running to lean until around 5000 so the afr was tuned because you dont do such extensive mods and not tune for it. Theh owner drives this car hard and we dont need it blowing up on him.

 

well, sounds like you guys are on to something, care to enlighten us, or just me?

ahhh, there's the gain, changing the tune.

 

I would not mind a ported head from you guys but i dont want a month or more in down time waiting for the head to get back. I drive this car everyday.

 

We have a head ready to be shipped to the machine shop so if you buy one you will have the new head sent to you and then you will send back your old for a core exchange. So it can be done in as little as 2 days. It could be done on a weekend if you are good to do it your self but I would not recomend this for a novice. A good shop could probly do it in 1 day.

 

the test were on the exact same dyno, same SAE corrections.

Yes the HP numbers are spikes both stock and ported. I'll see if I can get a graph from the dyno overlaying both runs. The difference throughout the entire power is significant.

The only tuning we did was to account for the increase in air flow. Just fixed the air/fuel.

If you don't think our stock numbers were good, take a look at the GM Stage 2 sheet posted in the first post. Still 30WHP on top of GMS2. Every GMS2 we dyno'd ran those numbers +/- a few HP.

Flow Numbers:

 

wow over 100cfm increase on exhaust, and almost 100cfm increase on the intake, @550 lift. thats verry impressive. good flow numbers.

 

Damn...

Time to pull the head off my car again!

 

haha, you are looking at that chart wrong. It's a little over 40cfm increase intake and a little over 50cfm increase exhaust.

Still a lot though. But not over 100.

 

all I know is that I want one, and as soon as I can come up with a way to pay for it you will have a pm

 

this sounds good, and you guys are a lil bit cheaper then JPB

 

click... just imagine the possibilities...

 

and better flow numbers dont neccessarily lead to more power/torque but the exhaust port is the cork in this motor...

 

QFTT, I'm doing a mild port/polish to my head when I add all my new mods. Also porting the stock intake manifold. Stock exhaust ports are tiny though.

 

so how many would be interested if we run a group buy on the head and beat up on our supplier for a really low price.

 

are you using stock valve sizes and lift with that huge ass gain?

 

ah ur right, damn it how did i miss that. crap such a noob mistake.

 

GMPP has some heads with exhaust ported...700 bucks

Would have to be just the assembled (possibly unassembled) head for me to be interested. Don't need the exhaust, don't need the t/s.

IE
CNC port intake, exhaust and chambers
Diamond honed guides, valve job and deck skim
SI Valves Intake Valve - GM Ecotec - 36.1mm (+1mm)
SI Valves Exhaust Valve - GM Ecotec - 31.1mm (+1mm)
Ferrea GM Ecotec Titanium Retainer - use with S10057 valve spring
Ferrea GM Ecotec Dual Valvespring - 75lb on seat, 14mm max lift
GM Valve Seal - GM Ecotec
Head studs
Cosmetic Head Gasket

Even then...it's still may be cost prohibitive for me.

 

Depends on the price but I'd definitely be interested

 

Curious...

 

Any updates on this project or the cylinder head?

 

ya any update?

 

waiting to get the car back for the TS install, customer is in school at the moment