alperx

hello,
I want to get some opinions about rpms.

I have an ls/vtec with

ls block (stock crank without any fault)
eagle rods
wiseco low comp pistons
b18c1 head (stock)

crank and head all factory sizes.

do you think 8000 rpm redline and 8250 max rpm is completely OK with turbo or not ?

Thanks

civickiller

make sure you have a vtec or obd 2 oil pump

i got a 96 stock ls bottom end
95 b18c1 all stock head, 2nd gen b16 cams
tuned

na redline 8500rpm for 3 years, raced every weekend 161whp
turbo 6 months(blew turbo seals) 8900rpm raced every weekend too 266whp
back to na 8500rpm

motor still going

alperx

I see..
was your rotating assembly specially balanced while being built ?

civickiller

nope, never gave it that much thought

it was just a completely stock bottom end

i forgot to mention when i was doing the head swap, i put in ge headstuds

my friends said because i dont race enough but in the 5 years ive had it, mustve put at least 2,000 passes

alperx

pistons changed ?

civickiller

nothing changed

bottom end was never touched. previous owner was using nitrous too

oh i had a type r manifold on the head too

lsturbo33

Have the bottom end balanced so your safe. I rev mine to 8k 370whp just a dd.

alperx

well, I did not have much knowledge about what balancing is..
I wish I could build my engine once again - but for the moment it's too hard..
How can I understand that it needs balancing ?
is there any clue I can get ? vibration level ? noise ?

Dc4LsTeG

iTrader: (7)

Your not gonna hear if it needs balancing. Balancing is just putting those parts together and having them balanced together so you can rev higher and put more abuse on the motor

kyden

8500 is completely fine.

alperx

1. you mean - 8500 is fine - with the 3rd market parts I use on the factory balanced LS crank - right ?

2. I also don't use the power steering and A/C and still use the OEM pulley.
my OEM flywheel is also resurfaced 4 times

Do these bother anything ?

Do you recommend me to change anything on this setup ?

crvtectim

Stock GSR redline is 8K. Depending on your setup, you may not be making power up that high. Choose your redline once you're on the dyno and can actually see if it's beneficial to turn the motor more rpms or not.

Vinnie909LSVTEC

I rev mine to 8200 anything over that on mine doesnt make any more power on the dyno so no need to rev any higher!

Stock b18b bottom end Stock pr3-3 head only ARP head Studs everything else internaly is stock

alperx

Alright - if you're using stock internals, your car is already balanced.

I just wanted to ask if it's still healthy to turn up to 8k rpms with changed internals without re-balancing the rotating assembly.

kyden

your aftermarket rods have arp bolts, which is what is allowing you to rev as high. balancing the crank is not necessary, but it is nice to do (i did get mine balanced, but they took so little off i won't bother the next time around.)

alperx

ok
thanks very much..
nice to know that

aaron lee

Exact set up im doing tomarrow how much pwr did u make jw