16v big cams

[stefan]

hi I'm rebuilding my motor am going to go na banger

cams I was wanting good responsive power so cam deg 304 8.5 mm lift

or a 288 deg with a 9mm lift

want it reasonably streetable also running quads and microtech ecu and 4.1 kg fly wheel

what are your ideas??????????

[Jonny Rochester]

A very basic rule of thumb has been: the greater the duration, the higher the rpm where max power will be made. The greater the lift the more torque. But a engine is very dynamic and weird things happen.

If I was going to rev it to 8500rpm I would go the bigger duration. But I don't have much experience with this.

[grassworkzgarage]

how bigs ya buget cause higher the lift means valve train work will need to be done to handle it cbf going into it but you change one thing then you need to changge another thing & so on & so on
it aint as easy as putting in some 304 bump sticks and off you go ...... I wish lol

[kaibeecee]

^ in other words he's saying if you go to a higher duration (to be safe say past 264in or ex) you'll need a valve lift kit, get bigger shims

[Chrisso]

^ in other words he's saying if you go to a higher duration (to be safe say past 264in or ex) you'll need a valve lift kit, get bigger shims[/b]

...and you may need shim under bucket, or shimless buckets if you're looking to increase the lift. Throwing a shim at high revs will be a costly experience.

[mc68]

304 8.5 mm lift

or a 288 deg with a 9mm lift

4.1kg flywheel

"want it reasonably streetable"[/b]

It's an oxymoron

[chapl]

just get mine man

straight bolt in no mods

[stefan]

what is the lift on your cams kane?

[chapl]

8 I beleive

maybe 7. something

but you don't have to change any shims.. maybe valve springs but thats it.

[awang]

any camshafts with 9.0mm of lift and above require valve train kit

correct me if I'm wrong

[The Enthusiast]

I'm looking at 275 cams and I was told need some valve work so yeah if that helps

[stefan]

what is the absolute limit you can run big ass cams with no mods?

[grassworkzgarage]

it's all about the lift not so much duration the lift is whats going cause issues with catching the buckets ect ect

[japlish]

what is the absolute limit you can run big ass cams with no mods?[/b]

There just no point if you don't do things like hi comp pistons .8-mm, .5-mm head gasket, port polish ect, ect, ect
Bumping up compression is very important if you want to get the most out of really big cams.
If the engine is going to be internally stock, 260ish is probably all thats worth it really.

[chapl]

very true^^

once the head is off, you most well get it port/polished, need the block ballanced etc etc
do it once and be done with it..

spend 3g like me lol :mellow:

[stefan]

full rebuild is the go port and polish um do any of you people shave the head like 10thou? and get fully balanced internals?

and running 4agze injectors would that be a good move?

[chapl]

if your car is revving high (which is where the power is) a ballanced bottom end pretty much needs to be done...

do this

port/polish head
ballance/blue print bottom end
cams (mine :P )
valve springs
ze injectors
custom extractors
quads????
head gasket
after market ecu or a piggy back ecu (safc)
head bolts
better fuel pump
etc
etc

the list goes for ages man

[RobertoX]

kane: you need an ecu

safc don't cut it!

[chapl]

kane: you need an ecu

safc don't cut it![/b]

remap jdm ecu plus safc = cheap winnah

but yeah, proper ecu is the go

[johnny_08]

do they balance and bleuprint bottom ends if you get a rebuild or do you have to ask them?

[stefan]

anywhere decant to get rebuilds? I know your heading to melb to get urs done soverign auto is way to expensive nosfags bro well bit iffy there

um where is good um whats lewis engines like ? or does he specialize more in turbos