Max head flow for 25 psi race motor

[Department Of Boost]

I want flow numbers!

 

[05stroker]

I want flow numbers!

I do as well! If at all possible I want to see where they come in with the big dogs!

 

[05stroker]

I'm a bit out of it right now so forgive me if I'm wrong. But isn't that backward? The more you cut out of the chamber/deck the less you get in volume per cut???

You're right. The area of the chamber decreases the more you cut, therefore the volume cut off decreases as well.

SHIT! Okay it just clicked, I hate it when that happens! Its a good thing I am not blonde... I will still just do .020 and see what happens. I can always go more if needed.

 

[Department Of Boost]

SHIT! Okay it just clicked, I hate it when that happens! Its a good thing I am not blonde... I will still just do .020 and see what happens. I can always go more if needed.

I wondered what you were talking about when you said you were looking at them upside down, LOL!

I figured the next time you were looking at them they would make sense.

 

[05stroker]

I wondered what you were talking about when you said you were looking at them upside down, LOL!

I figured the next time you were looking at them they would make sense.

Maybe it was Jack... LOL

 

[RED09GT]

Looking forward to the numbers and seeing them with another .020" shaved off.
I'm wondering how aggressive to get with my heads as far as milling them.

I remember reading stuff about the milling having an effect on the cam timing with the 2v and 4v motors but with adjustable gears and in my case-active VCT, it should be pretty easy to correct-if it is even a factor at all.

 

[05stroker]

Looking forward to the numbers and seeing them with another .020" shaved off.
I'm wondering how aggressive to get with my heads as far as milling them.

I remember reading stuff about the milling having an effect on the cam timing with the 2v and 4v motors but with adjustable gears and in my case-active VCT, it should be pretty easy to correct-if it is even a factor at all.

We will know very soon. No going back now. I think it will help that I am degreeing the cams.

 

[05stroker]

Well, that .020 made a huge difference! Now at 47.5cc that equates to 12.04 c/r with my current setup. That is why I was thinking as the camber tapers down or inward/smaller with the head upside down the material taken off would gain c/r per .000 taken off.

Looks like a 12.04 c/r with boost build now! The throttle response should feel amazing but, Manuel is going to hate me...

What is the limit of E85 again???

 

[BruceH]

I want flow numbers!

This!!!!

 

[05stroker]

This!!!!

I found a shop in Ft Worth that can do it the week after next. It will delay the motor going together for one more week but, like you guys, I have to know!

At $90 per cylinder though, I only have one chance. I will only flow one and hope I picked a common cylinder. If a vendor can do this and give me some honest numbers on both heads and all 8 cylinders for decent price, my ears are open... LMK

 

[hamish]

Thats a ridiculous price.

 

[05stroker]

This!!!!

What is the limit of E85 again???

This! LOL

 

[05stroker]

Thats a ridiculous price.

Maybe, I just started looking.

 

[BruceH]

This! LOL

AFAIK E85 won't detonate. Maybe it will with forced induction, don't know. The papers I read on it said that anything at or over 50% ethanol couldn't be made to detonate with an official knock testing motor.

I think you are using the correct fuel for what you are doing. However, I may be wrong, lol.

 

[05stroker]

AFAIK E85 won't detonate. Maybe it will with forced induction, don't know. The papers I read on it said that anything at or over 50% ethanol couldn't be made to detonate with an official knock testing motor.

I think you are using the correct fuel for what you are doing. However, I may be wrong, lol.

I am going to start with 20 psi at low rpm and 14* timing and go from there. Im sure Manuel can set me in the right direction from there after seeing the logs. I will start as I do with all new setups with the good old 5k pull in 2nd on the driveway. LOL

 

[crownaviation]

You are eventually going to run out of driveway lol... you need a contractor to give you a bid on another couple thousand feet of concrete

... that or get good at packing a parachute! Neighbors would get a kick out of that hehe

 

[05stroker]

You are eventually going to run out of driveway lol... you need a contractor to give you a bid on another couple thousand feet of concrete

... that or get good at packing a parachute! Neighbors would get a kick out of that hehe

Just need to run it up the hill, then I would have 1/4 mile, just no room to stop.

 

[05stroker]

Did some testing this morning.


In. 194cc
Ex. 73cc
CC. 47.5cc

Flow
In. TBD
Ex. TBD


FRPP Stage 3
In. 214cc
Ex. 73cc
CC. 48cc

Flow
In. 291 cfm at .600
Ex. 191 cfm at .600


Stock
In. 174cc
Ex. 62cc
CC. 51cc

Flow
In. 224 cfm at .600
Ex.153 cfm at .600

 

[Department Of Boost]

Did some testing this morning.


In. 194cc
Ex. 73cc
CC. 47.5cc

Flow
In. TBD
Ex. TBD


FRPP Stage 3
In. 214cc
Ex. 73cc
CC. 48cc

Flow
In. 291 cfm at .600
Ex. 191 cfm at .600


Stock
In. 174cc
Ex. 62cc
CC. 51cc

Flow
In. 224 cfm at .600
Ex.153 cfm at .600

I'm not sure how much I would rely on the FRPP #'s........

 

[BruceH]

I wonder what the breakdown is on desired flow rates between intake and exhaust for different setups?

By different setups I mean na, turbo, centri, pd, even nitrous. I had an in depth discussion with Marc S once on the desired ratio between intake and exhaust flows on an na motor but I don't remember the specifics.