elementmilwaukee

so, b18c1 t3/t4oe 8.5:1 pistions and buying valves... I've gotten SOO many recommendations about this

Intake - Exhaust
---------------------
+1mm +.5mm
+1mm +1mm
+.5mm +.5mm
+-0 +-0

WTF??? I need some good hard information about what's best to do? All the info I've gotten has seemed to make sence, but I'm still so confused...

Thanks - Dominic.

elementmilwaukee

bumpy bumpy bumpy bumpy bumpy bumpy bumpy<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by elementmilwaukee &raquo;</TD></TR><TR><TD CLASS="quote">so, b18c1 t3/t4oe 8.5:1 pistions and buying valves... I've gotten SOO many recommendations about this

Intake - Exhaust
---------------------
+1mm +.5mm
+1mm +1mm
+.5mm +.5mm
+-0 +-0

WTF??? I need some good hard information about what's best to do? All the info I've gotten has seemed to make sence, but I'm still so confused...

Thanks - Dominic.
</TD></TR></TABLE>

Jared

Go with stock for a street car. I've seen stock valve size heads make 600whp.

elementmilwaukee

ok.. but I'm replacing them anyway because I don't want to burn a valve, sooo bigger is better right? plus I'm getting the ferrea valves of my choice for next to nothing....

Doodoo

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by elementmilwaukee &raquo;</TD></TR><TR><TD CLASS="quote">ok.. but I'm replacing them anyway because I don't want to burn a valve, sooo bigger is better right? plus I'm getting the ferrea valves of my choice for next to nothing....
</TD></TR></TABLE>

When you burn a valve you burn a valve. Stock will work just fine. Its up to you to get your motor tuned right so you don't burn a valve. I have burned a Ferrea before. My car was not tuned and I was stupid. If you know the valves are fine then don't waste your money.

Jared

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by elementmilwaukee &raquo;</TD></TR><TR><TD CLASS="quote">ok.. but I'm replacing them anyway because I don't want to burn a valve, sooo bigger is better right? plus I'm getting the ferrea valves of my choice for next to nothing....
</TD></TR></TABLE>

If you're replacing them anyway, just get stock size stainless valves. And bigger isn't always better. If you put oversize valves in there and don't have a competent porter change the area behind the seat, the bowl, and the short turn to compliment the bigger valves, then you will end up losing power.

Soon_2b_evil

its all about your setup. what you want to do with it.
is it a street car, race car?
are you going to REV high?
How big is your turbo?
you can go on and on.

z6

stockerz

elementmilwaukee

it's going to be a powerfull street car I want to safely rev high, and run about 18-24 p.s.i I'm shooting for about 275hp, and it will be driven softly for the most part, but I want to be able to tap into the ponies when neccissary, but isn't that every tuners goal?

DaX

iTrader: (1)

Also remember that bigger means more inertia. There is a cost associated with bigger valves.

elementmilwaukee

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by DaX &raquo;</TD></TR><TR><TD CLASS="quote">Also remember that bigger means more inertia. There is a cost associated with bigger valves.</TD></TR></TABLE>

More inertia? the valves I'm looking at are a lighter than stock valve, plus I think friction would be more of an issue, using stiffer valve springs and all.. plus it doesn't add to rotating mass so I don't think more inertia is going to abe a problem, right?

DaX

iTrader: (1)

If they are larger and lighter, no harm done. Linear inertia can be bad too...what do you think causes valve float?

elementmilwaukee

weak springs and a cam that's spinning around too fast and to narrow of a lobe? no?

SOUNDEFFECTS

Just use stock size, your going for 275hp? Come on stock valve size can support triple that amount.

stinker504

18-24 psi and only 275hp???? What are you using a blow dryer?

Garcia-Racing

stockers buddy!

elementmilwaukee

seriously, it's my first forced induction setup, what should I expect from that much boost?

alpha

If you are serious about buying valves talk to Earl and/or Flamenco-T.

Garcia-Racing

supertech blacks!!!

DaX

iTrader: (1)

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by elementmilwaukee &raquo;</TD></TR><TR><TD CLASS="quote">weak springs and a cam that's spinning around too fast and to narrow of a lobe? no? </TD></TR></TABLE>

Yes, the weak spring has a lot to do with it, but the cam spinning fast is really not what does it directly...the fast spinning cam makes the valve accelerate faster, and with a heavier [larger] valve with more inertia, you will reach valve float sooner.

http://www.prism.gatech.edu/~g....html

Dyno Queen

i run manley and i feel very manlie!!! haha there nice valves, stock size will do the job!!!

elementmilwaukee

ahh I see.,,,