lowering compression...
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From: Land Down, Under, Australia
lowering compression...
I know that probably the best way to lower the CR is to invest in some lower compression pistons, but that costs mega $$$!
So what about the alternatives?
Is using a lower compression metal head gasket a *SAFE* way to do it? or is it simply best to save up and go with the pistons?
So what about the alternatives?
Is using a lower compression metal head gasket a *SAFE* way to do it? or is it simply best to save up and go with the pistons?
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From: Jupiter
Re: lowering compression... (TraKtioN)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by TraKtioN »</TD></TR><TR><TD CLASS="quote">decrease power? even for a turbo application theres no point.</TD></TR></TABLE>
someones gonna bust out the hammer on you for this one...................
someones gonna bust out the hammer on you for this one...................
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From: Land Down, Under, Australia
Re: lowering compression... (DubbleD)
yeah and I could just run 20psi on stock internals too!!!
It isn't about the most power... boosting is obviously going to give me extra HP in abundance, but I would mind driving it more than once too!
It isn't about the most power... boosting is obviously going to give me extra HP in abundance, but I would mind driving it more than once too!
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From: Windsor, Ontario, Canada
Re: lowering compression... (TraKtioN)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by TraKtioN »</TD></TR><TR><TD CLASS="quote">decrease power? even for a turbo application theres no point.</TD></TR></TABLE>
It almost hurt reading this!
It almost hurt reading this!
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Re: lowering compression... (TraKtioN)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by TraKtioN »</TD></TR><TR><TD CLASS="quote">decrease power? even for a turbo application theres no point.</TD></TR></TABLE>
starts twitching.......
should i get him for this guys, or just leave it alone???
starts twitching.......should i get him for this guys, or just leave it alone???
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From: State College, PA, 16865
Re: lowering compression... (TraKtioN)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by TraKtioN »</TD></TR><TR><TD CLASS="quote">decrease power? even for a turbo application theres no point.</TD></TR></TABLE>
There *IS* a point. Sure you can keep the compression at 10:1 and run lower boost and still end up with teh same results... BUT there is a major flaw in this thinking... well not a flaw but a big *** headache.
Think about it... if you're running 8.5:1 and trying to tune it... a 1 psi change in boost isn't going to affect the overall air pressure in the cylinder as 10:1 with a 1 psi change would.
With 10:1, a small change in pressure will make a bigger difference in A/F tuning etc. When you're at 8.5:1 it gives you more room for tuning and less chance of blowing **** up.
The only advantage to using 10:1 rather than 8.5:1 is with the 10:1 you'll reduce some of the lag before the turbo kicks in since your compression under vaccuum is higher.
There *IS* a point. Sure you can keep the compression at 10:1 and run lower boost and still end up with teh same results... BUT there is a major flaw in this thinking... well not a flaw but a big *** headache.
Think about it... if you're running 8.5:1 and trying to tune it... a 1 psi change in boost isn't going to affect the overall air pressure in the cylinder as 10:1 with a 1 psi change would.
With 10:1, a small change in pressure will make a bigger difference in A/F tuning etc. When you're at 8.5:1 it gives you more room for tuning and less chance of blowing **** up.
The only advantage to using 10:1 rather than 8.5:1 is with the 10:1 you'll reduce some of the lag before the turbo kicks in since your compression under vaccuum is higher.
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Re: lowering compression... (TraKtioN)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by TraKtioN »</TD></TR><TR><TD CLASS="quote">Newbs...get a hondata and stfu.</TD></TR></TABLE>and blow your ******* motor
improper tuning at high compression WILL blow something, and with high compression you have very little room for error
stock pistons can't hold the pressure
and if you run high boost on high compression you must run 110+ octane or alcohol
shall i keep going?
improper tuning at high compression WILL blow something, and with high compression you have very little room for error
stock pistons can't hold the pressure
and if you run high boost on high compression you must run 110+ octane or alcohol
shall i keep going?
space cadet
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From: Spec Shakesland
Re: lowering compression... (UN-Boosted97Lude)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by UN-Boosted97Lude »</TD></TR><TR><TD CLASS="quote">and blow your ******* motor
improper tuning at high compression WILL blow something, and with high compression you have very little room for error
stock pistons can't hold the pressure
and if you run high boost on high compression you must run 110+ octane or alcohol
shall i keep going?</TD></TR></TABLE>
shut up sam and just give him the
improper tuning at high compression WILL blow something, and with high compression you have very little room for error
stock pistons can't hold the pressure
and if you run high boost on high compression you must run 110+ octane or alcohol
shall i keep going?</TD></TR></TABLE>
shut up sam and just give him the
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From: Hamilton, Ontario, Canada
Re: lowering compression... (shakes)
My point is dont change your pistons if they're alllredy high, just use less boost. Sure it may be harder to tune but you'll have better low end. 7+3=10 or 3+7=10 same thing!
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From: State College, PA, 16865
Re: lowering compression... (TraKtioN)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by TraKtioN »</TD></TR><TR><TD CLASS="quote">My point is dont change your pistons if they're alllredy high, just use less boost. Sure it may be harder to tune but you'll have better low end. 7+3=10 or 3+7=10 same thing!</TD></TR></TABLE>
Not quite that simple.... the tuning level becomes much harder.
Not quite that simple.... the tuning level becomes much harder.
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From: Land Down, Under, Australia
Re: lowering compression... (Arch-Angel)
ok ok, as amusing as this all is...
the reason I asked is because I am looking at a turbo kit that comes with a Rideal (?) headgasket that is meant to lower compression, and I want to know if that will be enough to protect my engine as a daily driver.
The plan is to run about 8psi with a T3/4.
if this spells trouble, what should I get to build up the engine?
BTW, did you mean 3:1 + 7psi = '10' is the same as 7:1 + 3psi = '10'????
if so, you really need to learn more about cars AND maths before you start shooting you mouth off...
the reason I asked is because I am looking at a turbo kit that comes with a Rideal (?) headgasket that is meant to lower compression, and I want to know if that will be enough to protect my engine as a daily driver.
The plan is to run about 8psi with a T3/4.
if this spells trouble, what should I get to build up the engine?
BTW, did you mean 3:1 + 7psi = '10' is the same as 7:1 + 3psi = '10'????
if so, you really need to learn more about cars AND maths before you start shooting you mouth off...
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From: Hamilton, Ontario, Canada
Re: lowering compression... (Arch-Angel)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Arch-Angel »</TD></TR><TR><TD CLASS="quote">ok ok, as amusing as this all is...
the reason I asked is because I am looking at a turbo kit that comes with a Rideal (?) headgasket that is meant to lower compression, and I want to know if that will be enough to protect my engine as a daily driver.
The plan is to run about 8psi with a T3/4.
if this spells trouble, what should I get to build up the engine?
BTW, did you mean 3:1 + 7psi = '10' is the same as 7:1 + 3psi = '10'????
if so, you really need to learn more about cars AND maths before you start shooting you mouth off... </TD></TR></TABLE>
Like I said newbs, ya 3:1 + 7psi = 10 haha
the reason I asked is because I am looking at a turbo kit that comes with a Rideal (?) headgasket that is meant to lower compression, and I want to know if that will be enough to protect my engine as a daily driver.
The plan is to run about 8psi with a T3/4.
if this spells trouble, what should I get to build up the engine?
BTW, did you mean 3:1 + 7psi = '10' is the same as 7:1 + 3psi = '10'????
if so, you really need to learn more about cars AND maths before you start shooting you mouth off... </TD></TR></TABLE>
Like I said newbs, ya 3:1 + 7psi = 10 haha
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