Safe REV range?
Thread Starter
On The Tree
Joined: Jan 2007
Posts: 112
Likes: 1
From: Kingston, Ontario, Canada
Safe REV range? Its been awhile since I had my last LS1, when they were new and we didn't know about them yet.
Anyway, I have another with an M6. What is the highest I could REV it before worrying about oil starvation, floating valves, bending pushrods?
A friend of mine said he's been through many pushrods in his M6, although, he rods the hell out of his. I know there is the factory REV limiter, but should I exercise more caution then that?
Anyway, I have another with an M6. What is the highest I could REV it before worrying about oil starvation, floating valves, bending pushrods?
A friend of mine said he's been through many pushrods in his M6, although, he rods the hell out of his. I know there is the factory REV limiter, but should I exercise more caution then that?
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Joined: Nov 2005
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100rpm before rev limiter is when I usually shift at the track...
I also like to rip it to 6k rpm every once in awhile, weather permitting...
It's the dreaded 5-2 shift or lesser 3-2 shift that will kill pushrods. The valve float usually occurs well past rev limiter. On the 98 cars, the rod bolts don't like rpm's above 6200, so that's an issue when doing heads and cam, may upgrade rod bolts as a precaution.
I also like to rip it to 6k rpm every once in awhile, weather permitting...
It's the dreaded 5-2 shift or lesser 3-2 shift that will kill pushrods. The valve float usually occurs well past rev limiter. On the 98 cars, the rod bolts don't like rpm's above 6200, so that's an issue when doing heads and cam, may upgrade rod bolts as a precaution.
Thread Starter
On The Tree
Joined: Jan 2007
Posts: 112
Likes: 1
From: Kingston, Ontario, Canada
Car is completely stock for now except with the skip shift elim.
Its an 01 10th anniversary Hawk
I will prob mod it a little, but not for at least a yr or two.
When so, I'll do an ATI SC and cam with SLP full exhaust and the rest of the nessessary upgrades to support a blower.
Its an 01 10th anniversary Hawk
I will prob mod it a little, but not for at least a yr or two.
When so, I'll do an ATI SC and cam with SLP full exhaust and the rest of the nessessary upgrades to support a blower.
Originally Posted by SladeX
100rpm before rev limiter is when I usually shift at the track...
I also like to rip it to 6k rpm every once in awhile, weather permitting...
It's the dreaded 5-2 shift or lesser 3-2 shift that will kill pushrods. The valve float usually occurs well past rev limiter. On the 98 cars, the rod bolts don't like rpm's above 6200, so that's an issue when doing heads and cam, may upgrade rod bolts as a precaution.
I also like to rip it to 6k rpm every once in awhile, weather permitting...
It's the dreaded 5-2 shift or lesser 3-2 shift that will kill pushrods. The valve float usually occurs well past rev limiter. On the 98 cars, the rod bolts don't like rpm's above 6200, so that's an issue when doing heads and cam, may upgrade rod bolts as a precaution.
i would say the same, i really wouldnt go that far unless i was at the track. mine is set to 6500, but i have the springs and cam to match that
i used to shift right at 5.5 when i was N/A....... actually i shifted right at 5k when i got turboed because my car wouldnt make any power over 5k because the springs and cam wouldnt take that
Originally Posted by SladeX
100rpm before rev limiter is when I usually shift at the track...
I also like to rip it to 6k rpm every once in awhile, weather permitting...
It's the dreaded 5-2 shift or lesser 3-2 shift that will kill pushrods. The valve float usually occurs well past rev limiter. On the 98 cars, the rod bolts don't like rpm's above 6200, so that's an issue when doing heads and cam, may upgrade rod bolts as a precaution.
I also like to rip it to 6k rpm every once in awhile, weather permitting...
It's the dreaded 5-2 shift or lesser 3-2 shift that will kill pushrods. The valve float usually occurs well past rev limiter. On the 98 cars, the rod bolts don't like rpm's above 6200, so that's an issue when doing heads and cam, may upgrade rod bolts as a precaution.
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From: Schiller Park, ILL Member: #317
"safe" rpm limit with stock valvesprings is 6200rpm. Can you raise the rev limiter and shift higher than 6200 without immediate failure? Sure, but higher than 6200 isn't really safe with the stock springs. That's the point in the rev limiter.
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Verdad Gallardo Joined: Nov 2001
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From: Schiller Park, ILL Member: #317
Originally Posted by craz1469
your shifting to high.....try 5500......you should get a better trap speed and dropped that et.....I had my car dynoed and it made its power at 5450.......with the mods above my et in sig
But if it works for you then I guess you might as well stick with it. That didn't work for me though.
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While you tell me I shift to high up, track results would say otherwise.
I have my dyno and track runs to determine my shift points.
I make my peak power at 52-5300rpm, but it floats at that hp level until rev limiter. The torque curve also indicates that my curve is relatively flat up to that point, while I may peak at 4krpm with torque, I still have over 300 ft/lb up to 6200rpm.
I tried doing a peak hp rpm shift but found myself consistently slower. I find I am really hurting on my 60 ft at the moment so this winter's mod's included LCA's and a better clutch. To hit 106mph 13.8 with a 2.6 60 ft shows me where I'm really hurting right now.
I have my dyno and track runs to determine my shift points.
I make my peak power at 52-5300rpm, but it floats at that hp level until rev limiter. The torque curve also indicates that my curve is relatively flat up to that point, while I may peak at 4krpm with torque, I still have over 300 ft/lb up to 6200rpm.
I tried doing a peak hp rpm shift but found myself consistently slower. I find I am really hurting on my 60 ft at the moment so this winter's mod's included LCA's and a better clutch. To hit 106mph 13.8 with a 2.6 60 ft shows me where I'm really hurting right now.
you think its hard shifting at a certain point, wait til you get a turbo and you mash it, wait for the little lag and bam.... it PULLS you til you let off, before i had my cam and springs, i would bounce off the limiter because i wasnt ready for the car to pull me to higher RPM like that, but after i got the cam and springs, i didnt really have to worry that much because i can support it. it still feels weird to shift at 6500, i normally shift between 61-6200 because it doesnt really make that big of a difference in my opinion. but i race more on the street as apposed to the track
Originally Posted by craz1469
your shifting to high.....try 5500......you should get a better trap speed and dropped that et.....I had my car dynoed and it made its power at 5450.......with the mods above my et in sig
Grab your dyno graph, and put the information in this link (you'll have to pick the points):
http://www.bgsoflex.com/shifter.html
Originally Posted by Stringfellow
Car is completely stock for now except with the skip shift elim.
Its an 01 10th anniversary Hawk
I will prob mod it a little, but not for at least a yr or two.
When so, I'll do an ATI SC and cam with SLP full exhaust and the rest of the nessessary upgrades to support a blower.
Its an 01 10th anniversary Hawk
I will prob mod it a little, but not for at least a yr or two.
When so, I'll do an ATI SC and cam with SLP full exhaust and the rest of the nessessary upgrades to support a blower.
