6800-7000 rpm, how reliable, 05 GTO
03-13-2011, 09:32 PM
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Teching In
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6800-7000 rpm, how reliable, 05 GTO I am preparing to swap in some new pieces. Flowtech ported 243's, PAC 1521's, Comp Cams Ultra Pro-Magnum LSx Rocker Kit, Morel link-bar lifters, 5/16 push rods, EDC 235/241 .614 on 112. Already on the Goat are a FAST 102 and Vararam.
If this setup is still making power in the 6800-7000 range will a stock bottom end hold up or just become a huge bomb with a short fuse. Shooting for 400 to the wheels uncorrected.
If this setup is still making power in the 6800-7000 range will a stock bottom end hold up or just become a huge bomb with a short fuse. Shooting for 400 to the wheels uncorrected.
03-13-2011, 09:55 PM
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how many miles are on your engine? personally i wouldnt go through all that work if the engine has more than 70k miles depending on how hard you drive your car. i mean if your going to tear your whole enigne apart you might as well do pistons and everything. you might want to consider puttng those parts on a new short block! and do you plan to do the work yourself?
03-13-2011, 10:10 PM
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how many miles are on your engine? personally i wouldnt go through all that work if the engine has more than 70k miles depending on how hard you drive your car. i mean if your going to tear your whole enigne apart you might as well do pistons and everything. you might want to consider puttng those parts on a new short block! and do you plan to do the work yourself?
Currently the power peak was right at 6600-6700 with just cam,LT's,exhuast, factory airbox. You guys are good!
03-14-2011, 11:18 AM
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Mine shifts 1-2 at 7000rpm, 2-3 at 6800rpm, and 3-4 and 6600rpm (never make it that far) ... rev limiter is set at 7200rpm. I've had it set up like this for over 60k miles now ... no issues. I do change my valve springs every ~35k and use the lightweight LS6 valves.
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03-14-2011, 02:18 PM
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Thanks for all of the info. Sounds like a resaonable gamble to spin it to those levels. I should of said it up front. My question about the rpm's was geared towards road racing. The gearing of a car just does not work perfectly at every track and sometimes a corner comes up and it just does not make any sense to grab the next gear for 1-2 seconds. It just ends up being faster to hold on to whatever gear your in even though you are out of your power band.
03-14-2011, 09:46 PM
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I ran my Corvette to 7000 on a regular basis when it had the 01 6.0 with 130k mi on it. I had upgraded rod bolts, stock bottom end other than that. Now I run my 08 6.2 up there with just upgraded rod bolts. No problems on either one. I did replace the main bearings on the 6.0 but I don't think it had anything to do with my operating range, probably the mileage had more to do with it.
03-15-2011, 06:33 PM
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All right I am sure this will give you knowlegable guys a laugh but do rod bolt change outs require the engine to be pulled. Looks like alot of interference on the bottom of a GTO.
03-16-2011, 11:35 AM
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Changing rod bolts without checking the concentracy (sp?) of the rod bearing could be a gamble. People do it and I've seen people have no issues, or get the bearings to tight/lose. It's best to measure the bolts stretch rather than torque value as the type of lube and bolt materials can change the torque requirement.
