May 21, 2012, 06:45:31 PM *
Welcome, Guest. Please login or register.
Did you miss your activation email?

Login with username, password and session length
 

Pages: [1]
  Send this topic  |  Print  
Author Topic: What compression ration on iron heads is too much for street duty?  (Read 1914 times)
Freakingstang
is the one with The Magic Ballz
Badass Supporter
Badass Member
*
Posts: 4295
Vehicle: 2003 Ford Mustang Cobra





Ignore
« on: June 20, 2005, 07:21:52 PM »

Just wonder what personal experience has been with compression ratio and iron heads.  i know you can run about a point higher C.R. with aluminum heads, as they disapate heat faster.  I'm contemplating an "iron" head with .200 dome pistons.  Anyone have any suggestions.  I want to keep it 93 octane.  I have a couple sets of aftermarket heads to my demise.  I just think it would be cool to run the irons for s***s and giggles, since no one does anymore.  Read, I'm not saying stock iron heads, but some other kind of iron heads....lol.
Logged

Steve, one of many...
Badass 1986 GT VERT, 1989 Notch, 1966 Coupe

95 Sleeper
Badass Supporter
Badass Member
*
Posts: 4895




Ignore
« Reply #1 on: June 20, 2005, 08:13:18 PM »

N/A or Power Adder?
Logged

"Nitrous is like hot girl with with STD's.
You know you wanna hit it, but your afraid of the consequences."

BetterDays
Badass Supporter
Badass Resident
*
Posts: 11667
http://www.timeday.org




Ignore
« Reply #2 on: June 20, 2005, 08:14:06 PM »

Guessing N/A, since you normally want to lower compression with a power adder...

Logged
95 Sleeper
Badass Supporter
Badass Member
*
Posts: 4895




Ignore
« Reply #3 on: June 20, 2005, 08:16:38 PM »

Guessing N/A, since you normally want to lower compression with a power adder...


Yeah there is alot of factors like my 331 is a blower motor with a little under 9.5.1 which is higher for boost but I do not plan on running more than 10 Lbs of boost, so I am gaining a little more power with compression then having to run high boost for the same effect
Logged

"Nitrous is like hot girl with with STD's.
You know you wanna hit it, but your afraid of the consequences."

tmoss
Jr. Member
**
Posts: 152


WWW

Ignore
« Reply #4 on: June 21, 2005, 06:50:46 AM »

static compression is less important than dynamic compression ratio (DCR), which is determined by the cam to be used.  you can run higher ratios if you use a larger duration cam to tame the DCR.
Logged

Tom (Torque) Moss
88 5spd GT vert, 2 1/2" Flowmasters,Pro5.0 shifter, KBrown Chassis kit, 3:08s. , stock cam advanced 4°, NMRA prepped F/S GT40P heads with 1.7 rockers, MAC P headers Jet-Hot coated, 97 Exlporer intake/TB/injectors with ported lower.  277RWHP/330RWTQ

www.fastlanecars.com
Aussie XAXB
Guest

« Reply #5 on: June 21, 2005, 07:39:02 AM »

That's a point I tried to make last night but then ran into technical difficulties posting. I see my post didn't make it.

Cam timing has a more significant affect on what compression you can run than many people would think. As T-moss said cam timing will enable you to run more compression, but then you have to consider how much duration you want as far as the affect that it will also have on your engine performance (power band RPM, vacuum, idle, etc.).

For those going with forced induction you cannot go too far with duration or else you risk blowing air and gas out the exhaust.

Steve
Logged
Bwhitty799
Texas is the Biggest S***hole
Badass Supporter
Badass Resident
*
Posts: 13729
Vehicle: 1990 Ford Mustang GT


Lebanon Pennsylvania


WWW

Ignore
« Reply #6 on: June 21, 2005, 09:59:16 AM »

Guessing N/A, since you normally want to lower compression with a power adder...


Yeah there is alot of factors like my 331 is a blower motor with a little under 9.5.1 which is higher for boost but I do not plan on running more than 10 Lbs of boost, so I am gaining a little more power with compression then having to run high boost for the same effect
my 331 is 9.2.1, which is good for boost later down the road
Logged

Brandon
1990 GT
Blown 331 In The Works
1993 LX

2000 CBR 600
Few Odds And Ends
95 Sleeper
Badass Supporter
Badass Member
*
Posts: 4895




Ignore
« Reply #7 on: June 21, 2005, 03:02:52 PM »

Guessing N/A, since you normally want to lower compression with a power adder...


Yeah there is alot of factors like my 331 is a blower motor with a little under 9.5.1 which is higher for boost but I do not plan on running more than 10 Lbs of boost, so I am gaining a little more power with compression then having to run high boost for the same effect
my 331 is 9.2.1, which is good for boost later down the road
Mine is a tiny bit more.........

Quote
For those going with forced induction you cannot go too far with duration or else you risk blowing air and gas out the exhaust.

Steve
Hmmm  what do you think of 230/236 duration on a blower motor? Evil
Logged

"Nitrous is like hot girl with with STD's.
You know you wanna hit it, but your afraid of the consequences."

Freakingstang
is the one with The Magic Ballz
Badass Supporter
Badass Member
*
Posts: 4295
Vehicle: 2003 Ford Mustang Cobra





Ignore
« Reply #8 on: June 21, 2005, 10:43:09 PM »

Well it was gonna be N/A.  I tore the short block down last night and I got hosed.... The 5K DSS shortblock I bought has three crack cylinders, 30 over mains and 20 over rods......It is going back to the guy I got it from.  So once again.  4th change of motor plans in the last month.....

Maybe i should say screw the mustangs and stick with the new trend in Hot rods and street cars..... Rice


wtf
Logged

Steve, one of many...
Badass 1986 GT VERT, 1989 Notch, 1966 Coupe

Dan
Need An Enema?
Badass Supporter
Badass Resident
*
Posts: 20540

Detroit




Ignore
« Reply #9 on: June 21, 2005, 11:38:29 PM »

Freak, PM. Reply you 'tard!  Blam  Grin
Logged

"I don't really like handjobs. I don't like things you give me that I could give myself. Except when I do it, it's a hundred times better. It's like making Emeril Lagasse a microwaved cheeseburger for dinner. Think about the face Emeril would make if you made him Hot Pockets; that's the face I make when I'm getting a handjob."
Bwhitty799
Texas is the Biggest S***hole
Badass Supporter
Badass Resident
*
Posts: 13729
Vehicle: 1990 Ford Mustang GT


Lebanon Pennsylvania


WWW

Ignore
« Reply #10 on: June 22, 2005, 12:09:37 PM »

i will sell you my old 302
Logged

Brandon
1990 GT
Blown 331 In The Works
1993 LX

2000 CBR 600
Few Odds And Ends
tmoss
Jr. Member
**
Posts: 152


WWW

Ignore
« Reply #11 on: June 22, 2005, 12:19:51 PM »

Well it was gonna be N/A. I tore the short block down last night and I got hosed.... The 5K DSS shortblock I bought has three crack cylinders, 30 over mains and 20 over rods......It is going back to the guy I got it from. So once again. 4th change of motor plans in the last month.....

Buy a low mileage Explorer engine and use it as-is or build it!

Logged

Tom (Torque) Moss
88 5spd GT vert, 2 1/2" Flowmasters,Pro5.0 shifter, KBrown Chassis kit, 3:08s. , stock cam advanced 4°, NMRA prepped F/S GT40P heads with 1.7 rockers, MAC P headers Jet-Hot coated, 97 Exlporer intake/TB/injectors with ported lower.  277RWHP/330RWTQ

www.fastlanecars.com
95 Sleeper
Badass Supporter
Badass Member
*
Posts: 4895




Ignore
« Reply #12 on: June 22, 2005, 03:07:22 PM »

Well it was gonna be N/A.  I tore the short block down last night and I got hosed.... The 5K DSS shortblock I bought has three crack cylinders, 30 over mains and 20 over rods......It is going back to the guy I got it from.  So once again.  4th change of motor plans in the last month.....

Maybe i should say screw the mustangs and stick with the new trend in Hot rods and street cars..... Rice


wtf
Ah man that sucks
Logged

"Nitrous is like hot girl with with STD's.
You know you wanna hit it, but your afraid of the consequences."

Freakingstang
is the one with The Magic Ballz
Badass Supporter
Badass Member
*
Posts: 4295
Vehicle: 2003 Ford Mustang Cobra





Ignore
« Reply #13 on: June 22, 2005, 06:28:39 PM »


Buy a low mileage Explorer engine and use it as-is or build it!



I would, but I have two good stock shortblocks in the garage, but got a "GREAT SCREAMING< TOO GOOD TO BE TRUE" deal on this motor.  I wanted the compression, botton end reinforcement that this offered and didn't want to screw with a machine shop rebuild.  I wanted something that could be thrown in the car for the fourth of july weekend.  I've got the other motors to "build".  I just didn't have the time right now, and didn't want to bend over and take it straight from DSS, so i bought a used on and still got bent over..lol

Looks like the stock motor will be going back in for now....



Dan, will go if the car is done....I will PM you later...busy guy here...
Logged

Steve, one of many...
Badass 1986 GT VERT, 1989 Notch, 1966 Coupe

Dan
Need An Enema?
Badass Supporter
Badass Resident
*
Posts: 20540

Detroit




Ignore
« Reply #14 on: June 22, 2005, 06:29:59 PM »

Dan, will go if the car is done....I will PM you later...busy guy here...

Well call me before week's end. I need to know for work purposes.
Logged

"I don't really like handjobs. I don't like things you give me that I could give myself. Except when I do it, it's a hundred times better. It's like making Emeril Lagasse a microwaved cheeseburger for dinner. Think about the face Emeril would make if you made him Hot Pockets; that's the face I make when I'm getting a handjob."
Freakingstang
is the one with The Magic Ballz
Badass Supporter
Badass Member
*
Posts: 4295
Vehicle: 2003 Ford Mustang Cobra





Ignore
« Reply #15 on: June 22, 2005, 06:31:46 PM »

so call of for that friday..The 2nd.  I got the day off for sure, I just wanted to have the car done, and the folowing weekend is FFW @ Norwalk.  So, I wanted to have it done for the 2nd!!! I hate to take the chebby....lol
Logged

Steve, one of many...
Badass 1986 GT VERT, 1989 Notch, 1966 Coupe

Dan
Need An Enema?
Badass Supporter
Badass Resident
*
Posts: 20540

Detroit




Ignore
« Reply #16 on: June 22, 2005, 06:32:45 PM »

I have off the 1st-11th. But if you can't go, then I can't go. I can call work back and tell them I can work the following week. Just coverin' my ass.  Cheesy
Logged

"I don't really like handjobs. I don't like things you give me that I could give myself. Except when I do it, it's a hundred times better. It's like making Emeril Lagasse a microwaved cheeseburger for dinner. Think about the face Emeril would make if you made him Hot Pockets; that's the face I make when I'm getting a handjob."
Freakingstang
is the one with The Magic Ballz
Badass Supporter
Badass Member
*
Posts: 4295
Vehicle: 2003 Ford Mustang Cobra





Ignore
« Reply #17 on: June 22, 2005, 07:11:04 PM »

sweet.  You going to FFW?
Logged

Steve, one of many...
Badass 1986 GT VERT, 1989 Notch, 1966 Coupe

Dan
Need An Enema?
Badass Supporter
Badass Resident
*
Posts: 20540

Detroit




Ignore
« Reply #18 on: June 22, 2005, 07:24:07 PM »

Yep. Coming back from SC and taking some R&R time, class on Thursday and then I'm staying at Michelle's for the weekend. Gonna hit up Cedar Point too hopefully.
Logged

"I don't really like handjobs. I don't like things you give me that I could give myself. Except when I do it, it's a hundred times better. It's like making Emeril Lagasse a microwaved cheeseburger for dinner. Think about the face Emeril would make if you made him Hot Pockets; that's the face I make when I'm getting a handjob."
Freakingstang
is the one with The Magic Ballz
Badass Supporter
Badass Member
*
Posts: 4295
Vehicle: 2003 Ford Mustang Cobra





Ignore
« Reply #19 on: June 22, 2005, 08:29:04 PM »

whoa whoa whoa....get of my girl.  If I can't stay there (jerry permitting) then you sure as hell can't.....lol
Logged

Steve, one of many...
Badass 1986 GT VERT, 1989 Notch, 1966 Coupe

Dan
Need An Enema?
Badass Supporter
Badass Resident
*
Posts: 20540

Detroit




Ignore
« Reply #20 on: June 22, 2005, 08:30:07 PM »

whoa whoa whoa....get of my girl. If I can't stay there (jerry permitting) then you sure as hell can't.....lol

I work all of BAM dude. LOL
Logged

"I don't really like handjobs. I don't like things you give me that I could give myself. Except when I do it, it's a hundred times better. It's like making Emeril Lagasse a microwaved cheeseburger for dinner. Think about the face Emeril would make if you made him Hot Pockets; that's the face I make when I'm getting a handjob."
Freakingstang
is the one with The Magic Ballz
Badass Supporter
Badass Member
*
Posts: 4295
Vehicle: 2003 Ford Mustang Cobra





Ignore
« Reply #21 on: June 22, 2005, 09:32:30 PM »

  Ban

BS BS BS BS BS


No, they all work you.....
Logged

Steve, one of many...
Badass 1986 GT VERT, 1989 Notch, 1966 Coupe

BetterDays
Badass Supporter
Badass Resident
*
Posts: 11667
http://www.timeday.org




Ignore
« Reply #22 on: June 23, 2005, 04:19:32 AM »

whoa whoa whoa....get of my girl.  If I can't stay there (jerry permitting) then you sure as hell can't.....lol

Jerry does not want men hitting on Michelle, which is why you can't stay there.  But, since Dan is Gay, Jerry may enjoy getting the attention..

Jerry may be switching teams....  Huh

Post up plans for the Friday evening in the Events section here....
Saturday, I am planning for FFW, but I have to work Friday until about 4.



Logged
Bwhitty799
Texas is the Biggest S***hole
Badass Supporter
Badass Resident
*
Posts: 13729
Vehicle: 1990 Ford Mustang GT


Lebanon Pennsylvania


WWW

Ignore
« Reply #23 on: June 23, 2005, 07:17:18 AM »

Ban

BS BS BS BS BS


No, they all work you.....
yeah i agree dan
Logged

Brandon
1990 GT
Blown 331 In The Works
1993 LX

2000 CBR 600
Few Odds And Ends
Pages: [1]
  Send this topic  |  Print  
 
Jump to:  

Powered by SMF 1.1.5 | SMF © 2006-2008, Simple Machines LLC