boost limitations 30+psi?
boost limitations 30+psi? anyone here run in excess of 30psi
on a LSx motor yet?and I am not talking on a stock motor.
just curious with the block design and only having 4 bolts per cylinder
if anyone has run this kind of boost
on a LSx motor yet?and I am not talking on a stock motor.
just curious with the block design and only having 4 bolts per cylinder
if anyone has run this kind of boost
We have been over 30psi on a few runs. We see compression leaking into the cooling system that seems to start as we exceed 1200ft lbs. I will be running a couple more test runs on my engine soon that may help the learning curve.
Kurt
Kurt
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Originally Posted by spanktu
how much boost are you running smokin?
and what kind of head gaskets are you using?
and what kind of head gaskets are you using?
hope to be changing that soon as soon as i figure out how to start my hooptie
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Originally Posted by 427
We have been over 30psi on a few runs. We see compression leaking into the cooling system that seems to start as we exceed 1200ft lbs. I will be running a couple more test runs on my engine soon that may help the learning curve.
Kurt
Kurt
Do you have any flow data for heads @ 1 and 2 bar and above?
Amount of PSI req'd to make X HP depends on motor size, motor RPM, heads, cam etc right?
A motor with stock displacement, stock heads etc may take 28 PSI to flow enough mass to make 1000 HP, where a well breathing set-up may make the 1000 at 15 PSI.
I know have heard many times that there is no need to worry about head flow in big boost applications, but it has to have some effect.
Billy (W2W) is building a short block for me and I am trying to figure out how fast I need to spin the motor to make X HP with X boost
Brad
what ever happened to the 18 psi limit befor lifting the heads?
from what i'm getting, if you have arp studs ( not the 1/2 inch ones) you can go above 18 psi?
does the cam play a role in setting the upper psi limit ( the whole cylinder pressure thing and cam profile)?
from what i'm getting, if you have arp studs ( not the 1/2 inch ones) you can go above 18 psi?
does the cam play a role in setting the upper psi limit ( the whole cylinder pressure thing and cam profile)?
Originally Posted by 1dirtyZ
what ever happened to the 18 psi limit befor lifting the heads?
from what i'm getting, if you have arp studs ( not the 1/2 inch ones) you can go above 18 psi?
does the cam play a role in setting the upper psi limit ( the whole cylinder pressure thing and cam profile)?
from what i'm getting, if you have arp studs ( not the 1/2 inch ones) you can go above 18 psi?
does the cam play a role in setting the upper psi limit ( the whole cylinder pressure thing and cam profile)?
it seems once the ohio boys got their formula running with a well designed turbo kit (T6 framed) and a good engine management system, the ls1 turbo world took off.
they do push water out so they seem to be lifting some at their 1300+rwhp level, but what do you expect. They can run rounds with their engine so its no big deal, their w2w motor seems to be holding up quite well.
No flow data @ 1 and 2 bar or above.
Generally yes.
The ability to move more air is what makes more power, so a properly built larger engine will have the ability to produce more power. This assumes the engine is mechanicly sound when it gets big.
The ability to move more air is always good, within reason.
The amount of psi is a bi-product of forced induction. Size your power adder to move enough air for your power goal, the psi will be secondary.
Kurt
Generally yes.
The ability to move more air is what makes more power, so a properly built larger engine will have the ability to produce more power. This assumes the engine is mechanicly sound when it gets big.
The ability to move more air is always good, within reason.
The amount of psi is a bi-product of forced induction. Size your power adder to move enough air for your power goal, the psi will be secondary.
Kurt
Originally Posted by 422 ragtop
Kurt:
Do you have any flow data for heads @ 1 and 2 bar and above?
Amount of PSI req'd to make X HP depends on motor size, motor RPM, heads, cam etc right?
A motor with stock displacement, stock heads etc may take 28 PSI to flow enough mass to make 1000 HP, where a well breathing set-up may make the 1000 at 15 PSI.
I know have heard many times that there is no need to worry about head flow in big boost applications, but it has to have some effect.
Billy (W2W) is building a short block for me and I am trying to figure out how fast I need to spin the motor to make X HP with X boost
Brad
Do you have any flow data for heads @ 1 and 2 bar and above?
Amount of PSI req'd to make X HP depends on motor size, motor RPM, heads, cam etc right?
A motor with stock displacement, stock heads etc may take 28 PSI to flow enough mass to make 1000 HP, where a well breathing set-up may make the 1000 at 15 PSI.
I know have heard many times that there is no need to worry about head flow in big boost applications, but it has to have some effect.
Billy (W2W) is building a short block for me and I am trying to figure out how fast I need to spin the motor to make X HP with X boost
Brad