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Performance, Brainstorming & Tuning Talk about modifications, or anything else associated with performance enhancements. Have a new idea for performance/reliability? Post it here. No idea is stupid! (please use Detailing and Appearance for cosmetic ideas)

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Old 09-21-2007, 01:24 AM   #21
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I dont see how I would get a cam in the car without pulling the motor...
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Old 09-21-2007, 01:55 AM   #22
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Old 09-21-2007, 07:19 AM   #23
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It looks to me like it might be easier to pull the motor? probably take the exhaust manifolds off at that time as well I'm guessing. pull the motor out as a whole and then do the springs and cam at the same time.......at least if its in my garage type of project.

I'm still deciding between a cam and 1.9s....hard to tell if its a huge difference between the two based on track times though.
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Old 09-21-2007, 07:26 AM   #24
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There is a good difference. Cam changes the duration and lift, where the rockers only change the lift.

It is fairly easy to do the swap in the car with a few jack stands and a floor jack. Us poor 92-99'* pretty much have no support on that side of the car (why mine wears a bra) and I found it easier to pull the motor.

Having done rockers and springs on a few cars now, it'* easy in the car and slighty easier out of the car. The key there is having a helper and a magnet. While you change valve seals, the helper gets the new spring compressed for install.
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Old 09-21-2007, 07:32 AM   #25
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I'm not too concerned about running 12s actually. I may go back to the orginal plan of rockers like several other members here (shadd, bullet, p-dad, jshelton, etc) and be happy with mid 13s. I have rode in Jared'* and Paul'* cars recently and was plenty happy with the performance.

rockers look like they would take me a few hours were a cam may take me days and I may screw something up

I'm thinking 105# springs should suit me just fine? Anyone see any problems with them or are they just a "waste of money" if I dont plan on a cam?

With $5 a gallon gas next year I'm a bit concerend about a cam reducing my economy to 27 vs 30mpg with rockers
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Old 09-21-2007, 11:00 AM   #26
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105# are fine to run with rockers if they are in your budget.
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Old 09-21-2007, 12:03 PM   #27
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My 90 lb springs work fine up to 6200 rpm and don't put as much stress or wear on my stock cam and timing chain.
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Old 09-21-2007, 02:41 PM   #28
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Are those LS6?
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Old 09-21-2007, 06:54 PM   #29
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Quote:
Originally Posted by BillBoost37
Are those LS6?
Yes....

what addtional wear will 105s cause? I want the most reliable choice here guys....6000RPM is probably all I will take the car for now with rockers.
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Old 09-24-2007, 12:51 AM   #30
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I understood that the 90lbs put more stress on the timing chain dampener because of the increased rate of compression. Doesn't seem intuitive but if you see the math it actually makes sense. I run the 105# springs FWIW. I know intense runs the LS6s without any issues for a long time now. Heck you saw my results with rockers. I didn't think low 13s was too bad with my Gen III.
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