tow/performance cam L92 heads
#31
Crane part number 1989501
Excellent low end and mid range torque and HP, smooth
idle, daily usage, off road, towing, economy, valve spring
upgrade required, 2200-2600 cruise RPM.
HR-210/3236-2S-12 1200-5200 rpm power range
210/216 550/550 112 LSA
http://www.cranecams.com/166-167.pdf
Excellent low end and mid range torque and HP, smooth
idle, daily usage, off road, towing, economy, valve spring
upgrade required, 2200-2600 cruise RPM.
HR-210/3236-2S-12 1200-5200 rpm power range
210/216 550/550 112 LSA
http://www.cranecams.com/166-167.pdf
#34
Tin Foil Hat Wearin' Fool
iTrader: (36)
I like the stock LS3 cam or the one Roger recommended. These big port heads suck down low, you dont need to lose any more low end with a larger cam. I hate the L92 heads so much Im swapping to ported 243s to bump my CR and get better low lift flow numbers and will end up with a cam very close to what Roger recommended. These heavy trucks used as heavy trucks need low lift velocity and big port heads have a difficult time with that. I know with your truck beinga hemi you dont have the option of a smaller port head so Id be very careful with going too big on the duration. I like ROgers idea of higher ratio rockers if they make them. Quicker off the seat will net better low flow numbers.
#35
I like the stock LS3 cam or the one Roger recommended. These big port heads suck down low, you dont need to lose any more low end with a larger cam. I hate the L92 heads so much Im swapping to ported 243s to bump my CR and get better low lift flow numbers and will end up with a cam very close to what Roger recommended. These heavy trucks used as heavy trucks need low lift velocity and big port heads have a difficult time with that. I know with your truck beinga hemi you dont have the option of a smaller port head so Id be very careful with going too big on the duration. I like ROgers idea of higher ratio rockers if they make them. Quicker off the seat will net better low flow numbers.
#37
I haven't seen a better NA dyno graph period, there are better peak numbers out there but no one has posted a better under the curve.
Here is the PT thread I found it in:
https://www.performancetrucks.net/fo...ild-up-470269/
Here's the LS1 link:
https://ls1tech.com/forums/dynamomet...p-446rwtq.html
almost 425 lbft @ 2500 rpm at the crank is impressive, especially with it peaking over 540 hp.
"The cam is a 223/231 .610/.617 113LSA +4 advance using Comp LSL lobes and Patriot Extreme dual valve springs. As you can see, the combo worked amazingly well...."
Here is the PT thread I found it in:
https://www.performancetrucks.net/fo...ild-up-470269/
Here's the LS1 link:
https://ls1tech.com/forums/dynamomet...p-446rwtq.html
almost 425 lbft @ 2500 rpm at the crank is impressive, especially with it peaking over 540 hp.
"The cam is a 223/231 .610/.617 113LSA +4 advance using Comp LSL lobes and Patriot Extreme dual valve springs. As you can see, the combo worked amazingly well...."
Last edited by yurs78; 10-17-2012 at 12:01 AM. Reason: added cam specs
#38
I like the stock LS3 cam or the one Roger recommended. These big port heads suck down low, you dont need to lose any more low end with a larger cam. I hate the L92 heads so much Im swapping to ported 243s to bump my CR and get better low lift flow numbers and will end up with a cam very close to what Roger recommended. These heavy trucks used as heavy trucks need low lift velocity and big port heads have a difficult time with that. I know with your truck beinga hemi you dont have the option of a smaller port head so Id be very careful with going too big on the duration. I like ROgers idea of higher ratio rockers if they make them. Quicker off the seat will net better low flow numbers.
#40
Your valve sizes are correct but your are almost a point low on compression. The Eagle 5.7's are 10.5:1, it's the pre 09 5.7's that are 9.6:1.
Probably wouldn't hurt to correct that with your cam spec guys.
Probably wouldn't hurt to correct that with your cam spec guys.
Last edited by 1994Vmax; 10-17-2012 at 02:46 PM.