Cams recommendation ? New Springs needed ?

R

radiobar

New Member
hi !

i plan to install 264 cams with 10.5 lift ?
do i need install uprated springs ?

what do you think ybout 272 ones ? and maybe 11 lift ?

got GT3071 installed, car should have 420-450 hp.

i am interested in nice idle.
so i am not sure if 272 are good then...

thanks for any info.

bye.
 
R

radiobar

New Member
hi !

the JUN 264 are 10.8 lift

the 272 are 11 lift

so do i need uprated springs for the 264 or not ?
and what about the 272 and uprated springs ?

thanks
bye.
 
O

oap-r

I love Rob xxx
radiobar said:
hi !

the JUN 264 are 10.8 lift

the 272 are 11 lift

so do i need uprated springs for the 264 or not ?
and what about the 272 and uprated springs ?

thanks
bye.
Click to expand...
You won't need uprated springs unless you intend raising the rev limit by a couple of thousand.
 
O

oap-r

I love Rob xxx
radiobar said:
hi !

i plan 8000 rpm max - not more.

so i need to decide between 264 and 272.

any idea ?

thanks
bye.
Click to expand...
If you're raising the rev limit to 8k the 272 cams might breathe a bit better.

Did you not think to ask the cam manufacturer for their recommendations once you'd given them the spec of your car? Sometimes(most of the time ;-) ) it's better to ask the manufacturer for their views on how best to achieve your goals.
 
R

radiobar

New Member
hi !

JUN says that i need the springs.

but i know several cars running HKS 264/lift 10.5 with standard springs.

JUN 264 are 10.8 lift.

is it correct that 272 peak power will be later than with 264 ?

thanks
bye.
 
O

oap-r

I love Rob xxx
radiobar said:
hi !

JUN says that i need the springs.

but i know several cars running HKS 264/lift 10.5 with standard springs.

JUN 264 are 10.8 lift.

is it correct that 272 peak power will be later than with 264 ?

thanks
bye.
Click to expand...
Then maybe to get an unbiased opinion you should ask someone like Kent or Piper because JUN just want to sell you titanium collects and double springs etc etc

As a general rule,the more duration and lift a cam has,the higher up the rev range max power will be produced.
 
stumo

stumo

Active Member
The standard valve springs will become coilbound for any lift over 10.5mm (ie HKS 264 cams)
 
Nad

Nad

Active Member
I would also suggest replacing your springs anyway if they are the original ones and your car is not really low mileage. They are probably tired now and not performaning like they were from new. Dual springs are better but they wear faster. With new dual springs, valve float and bounce will be less likely. People dont realise how much work valve springs do, they are not something to save money on not buying.

L8rs

Nad
 
boucherie

boucherie

New Member
im in a similar position to you, but after much thought im going to go for the JUN 272s stage 2 kit and pulleys from greenline.com
from the top of my head you get 2 cams, pair of pulleys, double valve springs and titanium retainers and maybe something else that ive missed out for about £750delivered including paypal fees which i dont think is too bad
 
R

radiobar

New Member
hi !

ok,i think i will go for 272 with new springs and rocker arm stopper.

where are your parts from ?
direct JUN ?

bye.
 
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