sand man

the reason i want the high rev limiter is a bash dunes and i need more RPM so i wont loss power fast
i got my cam and all parts for a cam swap and the springs are on the way

here are my parts
compcams 219/222 ,.606/.601 , 111+4 lsa, 107icl
i have ls7 lifters and 7.425 prods
stock rockers, patriot extreme dual gold valve springs rated at .660"
ls2 timing chain, ls1 chain dampner, arp head bolts
will buy a milling high pressure for safty
pat specd me the cam and i said i want a 6500rpm rev limit
now even though i didnt install it yet i want more rpms

would this cam give up on me befor 6700-6600 or even 6800rpms?

what about valve float?
i heard the ls1 floats @ arround 6800rpms?

dirt track racer 81

iTrader: (45)

You won't have any valve float with those springs. I doubt that cam will make much power past 6500.. Will it turn 7000? Yes I'm sure it will.
What's this going in? You can't run an ls1 balancer with truck accessories. Some people will say you have to run aftermarket rod bolts if your turn over 6500.. I put over 100 bottles thru my 5.3 turning 7000 on stock rod bolts. Just sayin..

sand man

i dont have the ls1 harmonic balancer i have the chain dampner

do you really think that the cam will drop after 6500? i hope not

ill see what the dyno says about that, my main concern is what is the max safe rpm for my application?

ayousef

your transmission will kaboom...

ayousef

oh and btw, just change the rear end ratio and call it done, no need to spin that high when there are better options available.

sand man

the tranny is a 6l80e wich can run higher than 7000rpms

a friend of mine has an lsx 427 with 7000rpm on a completly stock 6l80e not even a cooler
obviously its tuned

ayousef

your friend is lucky because 6l80's dont like to go beyond 6500rpms, UNLESS you dont mind it blowing up. I know people who spin their motors beyond 7000rpms at the strip with built 6l80s but he wont recommend anyone run above 6500 on a street car.

Also your friend probably has this on a corvette or a lighter car. The additional weight of the truck contributes alot to additional load on the transmission.

Up to you, but my suggestion would be to get 4.10's or something, you will be happy with them!

jrmchevyman

Really no need to shift higher than 6500 or 6600rpm in your app sand man.

dirt track racer 81

iTrader: (45)

My bad on the chain dampner, shouldn't of been tryin to read and drive at the same time.

sand man

this is the truck 427 lsx stock 6l80e, in the vid it say's its a 408 but iknow it isnt

408 GMC Sierra VS Chrysler 300C SRT8 - YouTube

so you guys think the cam wouldent die on me with long climbes @ 6500rpm shift?, my truck weighs about 5600lbs