Do you mainly tow around the city or highway or both?

 

The exhaust max lift is .602.

Will .600 lift springs be safe or do I need to stick with .660?

 

Some cheap used Comp 918's should get the job done.

 

little late to reply
I do have a 3000 stall
and if I get the chance I'll hook up heavy and see how it goes but I wouldn't hold my breath on that happening anytime pre July ish

 

The 0.600 should work, but you would probably have to change them out sooner than you would the .660s. The 0.600 should be slightly quieter valve train noise as well. If it was me and I already had the 0.660 I would use them for insurance piece of mind.

 

just checking in

but yea, lq9 does not come in a Denali SUV. Towing with the current setup right now will be just fine. The 3000 stall will help. I have had numerous setups in my Tahoe. It will tow just fine. I towed my 85 suburban 3000 miles cross country climbing hills, running a 100 mph. I did that with a 4K stall converter that was 9,5" dia! with 3.73 gears at that time. It towed just fine, anything Ive towed it moved it. I have a 3200 stall in it now. I have had everything up to a 4.88 gear behind my LQ9. Im back to a 3.73 gear now. With the 3200 and 3.73 gears, a 6.0 will pull fine.

My lq9 with l92 topend swap and a 227/235 cam, That cam is speced for l92 as well. IMO, Im sure will tow even better than a stock cam, and the stall gets it there instantly.

 

You are incredible.

The question was answered 10 times. Don't run more lift than a spring is rated for or it won't last and you are asking for trouble. Period. End of discussion.

Should someone close this damn thread??? Lol

 

lol, agreed, I see your still adding to it. lol
Some people dont log on here every 2 secs. so I can see your point. You can be a good mod around here.
Peace

 

I don't understand you're guys' reasoning behind not being able to run ".600" springs... Yea any idiot can read that the manufacturer recommends a max of .600" of lift but does anyone ever check the actual specs of the springs. Did anyone ask if he is going to run these springs at a specific installed height? Obviously all of this plays a roll in what springs to run.

If you look at the 918's, comp states they provide 130lbs of seat pressure at a 1.800" installed height. They state that coil bind happens at 1.100". So if you install your springs at 1.800", then you have 0.700" of travel before a possibly running into coil bind. Usually manufacturers keep the spring anywhere from 0.050"-0.100" away from coil bind. In this case, comp "rated" these springs to .600" max lift to give you a .100" cushion.

So the fact that his exhaust lobe is supposed to be ground somewhere around .602" lift doesn't tell me that the ".600 max lift" springs can't be used... There are too many variables in the valve train to make that assumption. Its garenteed that not all of his installed heights will be 1.800". One could be 1.805, another could be 1.795. That is why the cushion is built into the rated max lift.

 

Even if the manufacturer states X lift, why would you run that number spring for a cam with that lift?? You are right in that aspect, but why not get a spring that is more then needed just for piece of mind ????