Does this sound normal for Cobra 1.7's?

EHardy1971 · 03-10-2009, 07:45 PM

I know roller rockers are a little noisy,but when I first crank it up,it sounds like a damn 7.3 Powerstroke. After a couple of minutes,they quiet down. I did'nt need to shim them,in fact, I'm thinking my pushrods might be a bit on the short side. I hit 22 ft lbs of torque after 1/4 turn of pre-load. Watch the clip,and tell me if these sound normal....

QWKSNKE · 03-10-2009, 08:10 PM

how would your pushrods be short? Did you not use stock length puchrods?

QWKSNKE · 03-10-2009, 08:11 PM

If they quieten down after running for a bit, then there is a oiling issue somewhere or your lifters are weak

EHardy1971 · 03-10-2009, 08:18 PM

Quote:

Originally Posted by QWKSNKE

how would your pushrods be short? Did you not use stock length puchrods?

They're stock 6.25"

Quote:

Originally Posted by QWKSNKE

If they quieten down after running for a bit, then there is a oiling issue somewhere or your lifters are weak

I was thinking that as well. I know a couple of them had to pump up when I built the engine,and primed it before they got the pr's tight.

QWKSNKE · 03-10-2009, 08:21 PM

Were they new lifters?

EHardy1971 · 03-10-2009, 08:27 PM

Quote:

Originally Posted by QWKSNKE

Were they new lifters?

Nope,they were fairly low mileage ones. Yeah,I know,I know......

QWKSNKE · 03-10-2009, 08:30 PM

Quote:

Originally Posted by EHardy1971

Nope,they were fairly low mileage ones. Yeah,I know,I know......

I am going to do it anyhow

EHardy1971 · 03-10-2009, 08:32 PM

Quote:

Originally Posted by QWKSNKE

I am going to do it anyhow

I deserve it!

Oh well,I've been needing to pull the lower and port it anyway.

SlowJoe · 03-10-2009, 08:34 PM

i ran the same rockers on my old gt-40 motor in the coupe. just uncap the headers

stangman · 03-10-2009, 08:37 PM

Double

03-10-2009, 07:45 PM	#1
EHardy1971 Trunk Monkey Join Date: Jun 2007 Location: Home Posts: 5,708	Does this sound normal for Cobra 1.7's? I know roller rockers are a little noisy,but when I first crank it up,it sounds like a damn 7.3 Powerstroke. After a couple of minutes,they quiet down. I did'nt need to shim them,in fact, I'm thinking my pushrods might be a bit on the short side. I hit 22 ft lbs of torque after 1/4 turn of pre-load. Watch the clip,and tell me if these sound normal.... __________________ Eric 89 LX Coupe-Juiced 01 Lightning-Boost 06 TBSS

03-10-2009, 08:10 PM	#2
QWKSNKE 3v's are slow Join Date: Dec 2004 Location: Here and There Posts: 17,152	how would your pushrods be short? Did you not use stock length puchrods? __________________ 2009 Porsche Carrera S 2008 ///AMG C63.. Eurocharge Tune. RIP 2019 AMG GLC43..wife's 03 F250 SD.. Edge Evo, AFE Stage 1 CAI 08 GT. JBA axle back, FRPP springs, FRPP swaybars.. daughter's 01 Cobra vert... wife's I need a new toy

03-10-2009, 08:11 PM	#3
QWKSNKE 3v's are slow Join Date: Dec 2004 Location: Here and There Posts: 17,152	If they quieten down after running for a bit, then there is a oiling issue somewhere or your lifters are weak __________________ 2009 Porsche Carrera S 2008 ///AMG C63.. Eurocharge Tune. RIP 2019 AMG GLC43..wife's 03 F250 SD.. Edge Evo, AFE Stage 1 CAI 08 GT. JBA axle back, FRPP springs, FRPP swaybars.. daughter's 01 Cobra vert... wife's I need a new toy

03-10-2009, 08:21 PM	#5
QWKSNKE 3v's are slow Join Date: Dec 2004 Location: Here and There Posts: 17,152	Were they new lifters? __________________ 2009 Porsche Carrera S 2008 ///AMG C63.. Eurocharge Tune. RIP 2019 AMG GLC43..wife's 03 F250 SD.. Edge Evo, AFE Stage 1 CAI 08 GT. JBA axle back, FRPP springs, FRPP swaybars.. daughter's 01 Cobra vert... wife's I need a new toy

03-10-2009, 08:34 PM	#9
SlowJoe Mind Blowing Join Date: Jun 2006 Location: Dawsonville Ga Posts: 3,913	i ran the same rockers on my old gt-40 motor in the coupe. just uncap the headers __________________ Slow Joe Racing 2008 dodge ram 5.7 HEMI 1993 lx with a 289 and a 3 speed on the floor WTB 1955 t-bird project

03-10-2009, 08:37 PM	#10
stangman Senior Member Join Date: Oct 2007 Location: Wedowee, AL Posts: 515	Double