Chalk me up for another cam question.
Jan 11, 2014 | 07:51 PM
#1
Chalk me up for another cam question.
I have recently purchased a 2001 Yukon Denali with a LQ9. I am selling my Tahoe and going to swap the 3200 stall from my Tahoe. I do a good amount of towing and I am looking to put a cam in the truck. I would honestly love to swap the cam and potentially pushrods and would like to stay away from springs. I also don't want to have to change lifters so I don't have to pull the heads.
The truck has 120,000 and I am thinking with a mild cam I should be alright. So if I stick with a 212/218 or so cam could I get away with just the cam and push rods if it needs 7.4s? I would love to get into the 220 through 224 range but seems like those would defiantly need the springs and not sure if I would hurt my 2500-3200 range too much to tow? I have Lunati dual gold .660 max lift springs.
The truck has 120,000 and I am thinking with a mild cam I should be alright. So if I stick with a 212/218 or so cam could I get away with just the cam and push rods if it needs 7.4s? I would love to get into the 220 through 224 range but seems like those would defiantly need the springs and not sure if I would hurt my 2500-3200 range too much to tow? I have Lunati dual gold .660 max lift springs.
Jan 11, 2014 | 09:04 PM
#3
Unless your new to you 2001 Yukon Denali has had engine swap sometime in the past, its 6.0L is a LQ4 and not an LQ9. The LQ9 wasn’t released until 2002 in the Cadillac Escalade and re-released again in 2003 for the SS Silverado. The Sierra Denali got them in 2005, but surprisingly the Yukon versions never did. The VHO and later Vortec Max trucks as we all know were also blessed with them, but the only SUV to ever come with the LQ9 was the Cadillac.
That being said, with the amount of mileage your engine has, even if the stock springs could handle a larger cam such as what you’re looking at (which they can’t), I would recommend replacing them. While it is generally accepted as standard fare to replace the pushrods with stronger pieces, with such a small cam as what you’re planning, the stock pieces are adequate, the springs however are not.
That being said, with the amount of mileage your engine has, even if the stock springs could handle a larger cam such as what you’re looking at (which they can’t), I would recommend replacing them. While it is generally accepted as standard fare to replace the pushrods with stronger pieces, with such a small cam as what you’re planning, the stock pieces are adequate, the springs however are not.
Jan 11, 2014 | 09:11 PM
#4
Unless your new to you 2001 Yukon Denali has had engine swap sometime in the past, its 6.0L is a LQ4 and not an LQ9. The LQ9 wasn’t released until 2002 in the Cadillac Escalade and re-released again in 2003 for the SS Silverado. The Sierra Denali got them in 2005, but surprisingly the Yukon versions never did. The VHO and later Vortec Max trucks as we all know were also blessed with them, but the only SUV to ever come with the LQ9 was the Cadillac.
That being said, with the amount of mileage your engine has, even if the stock springs could handle a larger cam such as what you’re looking at (which they can’t), I would recommend replacing them. While it is generally accepted as standard fare to replace the pushrods with stronger pieces, with such a small cam as what you’re planning, the stock pieces are adequate, the springs however are not.
That being said, with the amount of mileage your engine has, even if the stock springs could handle a larger cam such as what you’re looking at (which they can’t), I would recommend replacing them. While it is generally accepted as standard fare to replace the pushrods with stronger pieces, with such a small cam as what you’re planning, the stock pieces are adequate, the springs however are not.
I concure.
Jan 12, 2014 | 07:42 AM
#7
I figured this would be the answeres. Ok. I will try to sell my 408 ad a short block and keep my springs and pushrods. Thanks.
Will a 224 bother me much in the 2500-3000 rpm range for towing?
Will a 224 bother me much in the 2500-3000 rpm range for towing?
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Jan 12, 2014 | 09:48 PM
#10
my 220 in a 5.3 seems to do alright in the 2500rpm range, I haven't tried to tow more then 3000lbs with it yet though