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does compression have anything to do with turbo? #330759 Nov 19, 2:00pm Nov 19, 2:00pm
Joined: Jan 2004
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jersey
drivethru1986 OP
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jersey
does compression have anything to do with turbo?
OK...this kid in my school who thinks hes the shit about cars...and who I admit knows more then me (im still really new at this stuff) says that compression has nothing to do with a turbo...is this true or not?

Re: does compression have anything to do with turbo? [Re: drivethru1986] #330760 Nov 19, 2:02pm Nov 19, 2:02pm
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RedSunCelica
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compression has everything to do with a turbo. the lower the compression the more boost. the higer the compression the less amounts of boost.

notice the 7th gen GTS celicas high compression only way to turbo/supercharge it is to lower the compression a bit to be able to boost a little. but then again there have been a few people that have turboed high compressions motors and are able to boost but the engine will wear down quicker.

most of the turbo cars youll see on the road there compressions range from 8 to 1 - 9 to 1 compression. so yeah compression does make a difference.

Re: does compression have anything to do with turbo? [Re: RedSunCelica] #330761 Nov 19, 2:08pm Nov 19, 2:08pm
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jersey
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cool thumbsup...now i know


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Re: does compression have anything to do with turbo? [Re: drivethru1986] #330762 Nov 19, 2:27pm Nov 19, 2:27pm
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Kim
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wow that kid is pretty dumb for being in school, damn public school systems !!! angry

"will someone please think if the children!"


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Re: does compression have anything to do with turbo? [Re: Kim] #330763 Nov 19, 2:55pm Nov 19, 2:55pm
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jersey
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its private catholic school...but he does go to vocation school 2 be a mechanic...sad really...


2004 AUTO GT-S............

"I may go slow.....but i look fucking good doing it...."
Re: does compression have anything to do with turbo? [Re: RedSunCelica] #330764 Nov 19, 3:51pm Nov 19, 3:51pm
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Originally Posted by RedSunCelica
compression has everything to do with a turbo. the lower the compression the more boost. the higer the compression the less amounts of boost.

notice the 7th gen GTS celicas high compression only way to turbo/supercharge it is to lower the compression a bit to be able to boost a little. but then again there have been a few people that have turboed high compressions motors and are able to boost but the engine will wear down quicker.

most of the turbo cars youll see on the road there compressions range from 8 to 1 - 9 to 1 compression. so yeah compression does make a difference.



Thata boy! thumbsup

Re: does compression have anything to do with turbo? [Re: GT2111] #330765 Nov 19, 4:47pm Nov 19, 4:47pm
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c2til
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Regular turbo engines has compression from 8:1 to 9:1
Regular street engines used to be in the 9's, and high performance and racing N/A engines hit 10, and 11:1

The lower the compression the easier job you got turbocharging it, you can use lower rated fuel, less safety devices, ect.. The low to mid responds will suffer, but usually turbo freaks just don't care and add more BOOOOST...nothing meets the rush of a well made turbo system.


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Re: does compression have anything to do with turbo? [Re: c2til] #330766 Nov 19, 5:36pm Nov 19, 5:36pm
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Right On Til! thumbsup

Re: does compression have anything to do with turbo? [Re: GT2111] #330767 Nov 19, 6:54pm Nov 19, 6:54pm
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There's this thing called static compression (or something like that) which is the total ratio once you factor in boost and piston compression.

In other words:

NA Car runs 11.5:1 pistons and the total CR is 11.5:1.
Turbo car runs 9:1 pistons and 15 psi and the total CR is the same as the aforementioned NA car.
(Numbers aren't exact, they're just made up examples).

Re: does compression have anything to do with turbo? [Re: silver] #330768 Nov 20, 11:25am Nov 20, 11:25am
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Yeah the GTS is 11.5:1 so with stock internals you can run ~6psi before having to beef em up(replace with lower compression pistons).

GT is 10:1 so you can run more boost...(not sure how much you guys run)

So you CAN turbo a high compression engine but you just can't run as much boost...

Re: does compression have anything to do with turbo? [Re: sbocaj55] #330769 Nov 20, 12:03pm Nov 20, 12:03pm
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on the C2 kit, for the GTS it looks like the filter is located where it would be if you have a CAI . Why is that ?

Re: does compression have anything to do with turbo? [Re: Larry_GTS] #330770 Nov 20, 12:45pm Nov 20, 12:45pm
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Someone who has the kit correct me if i'm wrong...

I think it's there and curves back down to the turbo because there is actually pretty decent airflow at that location because of that upper grill on the celi's.

Re: does compression have anything to do with turbo? [Re: sbocaj55] #330771 Nov 20, 12:52pm Nov 20, 12:52pm
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I would be scared , a turbo that cost me over 3Gs and its filter is that low... it would make me nervous.

Re: does compression have anything to do with turbo? [Re: Larry_GTS] #330772 Nov 20, 7:31pm Nov 20, 7:31pm
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how much psi can a gt have??w/out beefing up internals?


it doesnt matter wat u drive or who u driving against its all about how you drive
Re: does compression have anything to do with turbo? [Re: AznKhaos] #330773 Nov 20, 11:30pm Nov 20, 11:30pm
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6psi SAFELY.. but i've heard of 8psi as daily driver.. Depends on how you drive.

Re: does compression have anything to do with turbo? [Re: GT2111] #330774 Nov 21, 12:29am Nov 21, 12:29am
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Wow, a kid who claims to know about cars and doesn't think compression has anything to do with a turbo OBVIOUSLY doesn't know what a turbos purpose is, boost more air into cylinder so you can add more fuel = more compression = more power. Why does a turbo car take premium gas? Because the compression gets so high it might prematurely ignite regular fuel. do that to a car with naturally high compression and you got yourself some problems. Go ahead show him this site http://auto.howstuffworks.com/turbo.htm and the thread. ohboy


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Re: does compression have anything to do with turbo? [Re: GT2111] #330775 Nov 21, 12:32am Nov 21, 12:32am
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sigh i wish i had a turbo cry

Re: does compression have anything to do with turbo? [Re: Clos] #330776 Nov 21, 3:24am Nov 21, 3:24am
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tell him his breath smells like another man shit in it


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Re: does compression have anything to do with turbo? [Re: FastCelicaGT22] #330777 Nov 22, 12:04am Nov 22, 12:04am
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Compression ratio (CR) ---> what they said above.
There is another "compression" that refers to "cylinder compression" The value (normally in psi) is obtained by performing "compression check" It indicates how healthy of the cylinder, piston ring, and how much carbon built up in the cylinder. Different engines (turbo or not) have different acceptable ranges. This compression value has nothing to do with the turbo and very useful when buying a used engine or used car.


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Re: does compression have anything to do with turbo? [Re: GT4] #330778 Nov 22, 9:27am Nov 22, 9:27am
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yep


respect the gt-s
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