Life over 12psi??
Discussion
Plenty in the US do. But costs get high like Nige says.
Take a look at the forced induction forum on ls1tech.com
If you want more power you are much better off looking at your heads and camshaft as they are what will be holding power back at present.
An easy 100+bhp there Id say without changing boost as long as the blower has the air (HH122 should be good for it)
Take a look at the forced induction forum on ls1tech.com
If you want more power you are much better off looking at your heads and camshaft as they are what will be holding power back at present.
An easy 100+bhp there Id say without changing boost as long as the blower has the air (HH122 should be good for it)
Its all about RWHP and there`s more to be found properly sorting the drivetrain efficiency. [5000]
[50-70bhp IMHO]
Would have thought all internals will set you back 5-6000 fitted, drivetrain wise fix it as it breaks but don`t drive like a Muppet in the first place[ 3000]
Custom pulley, belt and remap [3000]
[130-150bhp]
Total £77.00 per BHP
[50-70bhp IMHO]
Would have thought all internals will set you back 5-6000 fitted, drivetrain wise fix it as it breaks but don`t drive like a Muppet in the first place[ 3000]
Custom pulley, belt and remap [3000]
[130-150bhp]
Total £77.00 per BHP
S600VXR said:
Not knowing alot about superchargers (this is my first one) has anyone or can you go over 12psi on these V8's if you uprate the rods, pistons and fit ARP or similiar head bolts and Cometic gaskets etc...?
If you are pushing a blower beyond its capabilities, with inadequate intercooling, then even the best pistons on the world can melt.You need to be sure the blower you are using is capable of supporting any increases, then build a fuel system, and engine that can make use of that.
Short motors are available in the US for around $5k, not terribly expensive by any means.
Or you could throw a set of rods and pistons into the current engine for around $1k parts cost ( again, plus shipping/duties etc )
Why waste money on Cometic gaskets ? when the standard GM MLS gaskets cost like $30, and work perfectly.
Im making about 20psi, although obviously not in the mid-range. No real issues there unless you do silly things like I do from time to time
But you need to forget boost targetrs. They are meaningless.
You could build an engine, mild cam and decent heads, and all of a sudden you might only be making 6psi from your previous 12psi.....except making more power on the lower boost.. Thats what you want.
You want to make the engine breathe, and hence make power...not to make boost.
So you whilst the standard LS pistons are a weak point....if you threw a set of decent head son, with slightly larger chambers to drop the CR a bit. You could probably make good increases over what you have, and be a tad safer.
But also ensure you have a fuel system to support any extra power.
Doleboy said:
S600VXR said:
Not knowing alot about superchargers (this is my first one) has anyone or can you go over 12psi on these V8's if you uprate the rods, pistons and fit ARP or similiar head bolts and Cometic gaskets etc...?
Bored already????Have you got a target power level in mind?
S600VXR said:
Doleboy said:
S600VXR said:
Not knowing alot about superchargers (this is my first one) has anyone or can you go over 12psi on these V8's if you uprate the rods, pistons and fit ARP or similiar head bolts and Cometic gaskets etc...?
Bored already????Have you got a target power level in mind?
Boosted LS1 said:
S600VXR said:
Doleboy said:
S600VXR said:
Not knowing alot about superchargers (this is my first one) has anyone or can you go over 12psi on these V8's if you uprate the rods, pistons and fit ARP or similiar head bolts and Cometic gaskets etc...?
Bored already????Have you got a target power level in mind?
Wheel hp Im after - anything else is like a wonder bra - not real when you go to use it.
Rods from powdered metal are I believe "investment cast",being a more dimensionally accurate item straight out of the mould ,as to speak,so not a forged item.As powdered metal the caps can then easily be "broken" in half.I think you will find that true forged rods are from a far higher spec: steel such as a chrome/moly type.
On another V8 manufacturer the oil; pump gears and trigger wheels are powdered metal and at high loads they have been known to shatter,so billet steel items replace these.
Just my tuppence worth.
On another V8 manufacturer the oil; pump gears and trigger wheels are powdered metal and at high loads they have been known to shatter,so billet steel items replace these.
Just my tuppence worth.
^ That's an interesting point. I'd assumed the flash line indicated a forging but the fractured rod caps do show a lot of roughness, good for location. On another note cast rods haven't been used for eons and certainly not in performance engines afaik. Wonder if there's any specific info about this.
Just found this which is interesting. Some pressure is used to make the rods.
http://en.wikipedia.org/wiki/Powder_metallurgy
"Powder metallurgy is a forming and fabrication technique consisting of three major processing stages. First, the primary material is physically powdered, divided into many small individual particles. Next, the powder is injected into a mold or passed through a die to produce a weakly cohesive structure (via cold welding) very near the dimensions of the object ultimately to be manufactured. Finally, the end part is formed by applying pressure, high temperature, long setting times (during which self-welding occurs), or any combination thereof".
Just found this which is interesting. Some pressure is used to make the rods.
http://en.wikipedia.org/wiki/Powder_metallurgy
"Powder metallurgy is a forming and fabrication technique consisting of three major processing stages. First, the primary material is physically powdered, divided into many small individual particles. Next, the powder is injected into a mold or passed through a die to produce a weakly cohesive structure (via cold welding) very near the dimensions of the object ultimately to be manufactured. Finally, the end part is formed by applying pressure, high temperature, long setting times (during which self-welding occurs), or any combination thereof".
Edited by Boosted LS1 on Monday 14th January 20:05
ringram said:
None of the ls2 or ls1 stuff has anything forged in the crank, rod and piston department from OEM.
My point is he's already running 12psi and bought the car with 600bhp. I would hope he's already running strengthened internals as that seems an awful lot for standard rods and pistons?
wormus said:
ringram said:
None of the ls2 or ls1 stuff has anything forged in the crank, rod and piston department from OEM.
My point is he's already running 12psi and bought the car with 600bhp. I would hope he's already running strengthened internals as that seems an awful lot for standard rods and pistons?LS2 block has some mods to it to relieve stress and stuff, but Im not aware of too much other stuff. I think the rods are even the same length/type/part as the LS1.
So Id be surprised if the pistons etc were any stronger. Im guessing a 12psi blower on an LS1 would be less on an LS2 due to the better heads and capacity though. So in that manner the LS2 can handle it better.
If the 122 is out of huff then you need the new HTV2300 when it comes out, in fact I think its out now. But you really should have a decent cam in there too. Stock one is far from optimal.
So Id be surprised if the pistons etc were any stronger. Im guessing a 12psi blower on an LS1 would be less on an LS2 due to the better heads and capacity though. So in that manner the LS2 can handle it better.
If the 122 is out of huff then you need the new HTV2300 when it comes out, in fact I think its out now. But you really should have a decent cam in there too. Stock one is far from optimal.
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