Jimbo1367

Whats the stock port CC ? And I/E flow?


So where do you do your work out of Pray ? You obviously know what yer doing, Who is the real "Prey" ?

Thanks,
Jim

Jimbo1367

Almost 450 lbs at the wheels at 3K RPMs :yikes:

Pray

iTrader: (7)

I do all of my work out of my garage. I am just a one man show with a passion for airflow and making power on my own. LOL. I work for no one but I have been extremely blessed to have been guided by the best in the business. I have been on these Forums since 04' putting in work though.

The stock runner is 300cc's by my measurements. Here is what I put out on another Forum some time back with my prototype head. These heads are on my car. I have since upped the intake flow by about 10cfm and about the same on the exhaust. The heads have been showing 25-30rw gains on stock cammed and cammed cars.

"Finally got the heads finished up and ran them up to the 28" SF600 bench today. I didn't grab my best ports but the ports I did first on my bench that were still right next to the stock ports. I know these numbers are easily repeatable since all the other ports I did after this one flow a small bit better. 5 cfm at most. I did mess with the exhaust seat a little on the test runner and it bit me so the .300 number on the exhaust is down about 10cfm from the others. That won't happen again. I will rework it a little to get it back in line tonight.

I focused on the .300-.600 lift numbers for the stock cam guys. I didn't increase the cross section of the heads any in either direction. Just removed what I needed to from the inside. With a different valve job and a some more short turn work I could increase the top end flow and have the head run out to .650+ lift. Right now it crashes right at .640. It doesn't gain much at all past .600 lift though. That was the point of this head. A direct bolt on to the stock motor as a complete ported top end package with my IM/TB."

Intake Flow - 1/2" clay radius inlet

Lift.........Stock......Ported......Gain
.300........212.........226..........14
.400........270.........291..........21
.500........315.........340..........25
.550........324.........355..........31
.600.......Crash.......370........ALOT

Exhaust Flow - 2"x4" exhaust pipe

Lift.........Stock......Ported......Gain
.300........173.........182...........9
.400........206.........233..........27
.500........218.........260..........42
.600........215.........266..........51

DietCoke

iTrader: (18)

You might try a 1 or 2E stator. They are more efficient. I think its a better fit for the 8speed, since you dont need the hit of the C.

Pray

iTrader: (7)

When I had the trans rebuilt in my car I sent my converter back and got what ever the latest/greatest stator was. The above car has a standard 4C.

DietCoke

iTrader: (18)

They're both different, neither is better then the other. The E is a special order thing.

Pray

iTrader: (7)

Got ya. I will admit that I am ignorant to Automatics and Converters. I haven't raced an Auto since 02'. When I sent it in I expressed what was going on to Chris and was told that I was getting the latest, greatest best of everything when I got it back. I wish I could remember what "cutting edge" stator he said they put in it.

Patron

More shifts will always generally hurt ET. Asked this one sometime ago when I found a 6L80e in comparison to the 4L80. Turbo 400 was said to do even better. The more gears help with street manners and keeping the car in a good rpm range and mpg.

G Atsma

Would that explain why the good ol' Powerglide is big in drag racing?

Darth_V8r

iTrader: (4)

It also weighs less and requires less power to function due to fewer gears, reduced rotating weight, etc.

Pray

iTrader: (7)

Some of the big dog A8 guys are now starting in 2nd and seeing pretty good results. I think the 60ft drops about a tenth and they got .2 on the top end. 9.0's to 9.1 to 8.8's. I am not sure a H/C car has the nuts down low to take advantage of the 2nd gear start. But I will eventually try it.

sxc Z28

Sounds worth the shot. Whatever gets you well into 1:1 is the best bet.