how much compresion with stock rods and crankshaft

cucho · 02-05-2004, 08:05 PM

How much compresion can a 5.0 hold with stock rods and crankshaft? . Im using a 12.00 compresion but i want to put more
like 13.00 what u guys thing ? I need to now before start the ensambling work.

Jeff Chambers · 02-06-2004, 07:50 AM

I ran a little over 13:1 with a stock crank, Crower Sportsman rods and GT-40P heads in a motor that made about 465hp at the crank (on the engine dyno). Stock rods would do the same as long as they've got decent bolts in them.

cucho · 02-07-2004, 11:40 AM

Jeff, thanks for the advise. And also what kind of rod bolts you recomend me ill be thinking in the ARP the ones of 40 dlls. But if there are any ones better i apreciatte if you have the part number.

Jeff Chambers · 02-08-2004, 08:03 AM

ARP is fine.

86GT · 02-08-2004, 09:42 AM

Hey Jeff,
Do you have to re-size the stock rods if you're changing the rod bolts?

I've been told many times that its a must when changing bolts, so I figured I'm gonna ask around to find out for sure.

Jeff Chambers · 02-08-2004, 06:27 PM

Yep, you should check the big end sizing. Different bolts will distort the big end differently so you need to torque 'em up and check/resize.

02-05-2004, 08:05 PM	#1
cucho Registered Member Join Date: Oct 2003 Location: Mexico Posts: 50	how much compresion with stock rods and crankshaft How much compresion can a 5.0 hold with stock rods and crankshaft? . Im using a 12.00 compresion but i want to put more like 13.00 what u guys thing ? I need to now before start the ensambling work.

02-06-2004, 07:50 AM	#2
Jeff Chambers Moderator Join Date: Aug 2000 Location: Milan, OH Posts: 2,699	I ran a little over 13:1 with a stock crank, Crower Sportsman rods and GT-40P heads in a motor that made about 465hp at the crank (on the engine dyno). Stock rods would do the same as long as they've got decent bolts in them. __________________ Jeff Chambers 1990 Mustang GT 10.032 Seconds / 137.5 MPH 14-time Street Warrior World Record Setter CRT Performance 2001 Tropic Green Mustang GT - 12.181 / 113.2 MPH 2002 Ford F-250 Crew Cab 7.3l Power Stroke - 17.41@77.2 "There's nothing boring about a small block automatic shifting gears at 9400 rpm!"

02-08-2004, 08:03 AM	#4
Jeff Chambers Moderator Join Date: Aug 2000 Location: Milan, OH Posts: 2,699	ARP is fine. __________________ Jeff Chambers 1990 Mustang GT 10.032 Seconds / 137.5 MPH 14-time Street Warrior World Record Setter CRT Performance 2001 Tropic Green Mustang GT - 12.181 / 113.2 MPH 2002 Ford F-250 Crew Cab 7.3l Power Stroke - 17.41@77.2 "There's nothing boring about a small block automatic shifting gears at 9400 rpm!"

02-08-2004, 09:42 AM	#5
86GT Sniffed too much n20 Join Date: Oct 1998 Location: Ont, Canada Posts: 1,018	Hey Jeff, Do you have to re-size the stock rods if you're changing the rod bolts? I've been told many times that its a must when changing bolts, so I figured I'm gonna ask around to find out for sure. __________________ 2002 Windsor Weekend Q16 Qualifier

02-08-2004, 06:27 PM	#6
Jeff Chambers Moderator Join Date: Aug 2000 Location: Milan, OH Posts: 2,699	Yep, you should check the big end sizing. Different bolts will distort the big end differently so you need to torque 'em up and check/resize. __________________ Jeff Chambers 1990 Mustang GT 10.032 Seconds / 137.5 MPH 14-time Street Warrior World Record Setter CRT Performance 2001 Tropic Green Mustang GT - 12.181 / 113.2 MPH 2002 Ford F-250 Crew Cab 7.3l Power Stroke - 17.41@77.2 "There's nothing boring about a small block automatic shifting gears at 9400 rpm!"

02-07-2004, 11:40 AM	#3
cucho Registered Member Join Date: Oct 2003 Location: Mexico Posts: 50	Jeff, thanks for the advise. And also what kind of rod bolts you recomend me ill be thinking in the ARP the ones of 40 dlls. But if there are any ones better i apreciatte if you have the part number.

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