Please help me understand some technical stuff
10-27-2007, 12:17 PM
#1
1st Gear Member
Thread Starter
Join Date: May 2007
Location:
Posts: 101
Please help me understand some technical stuff
So I was sitting down with some friends last night discussing basic car stuff and the issue of high compression, naturally aspirated motors came up. A friend of mine is purchasing a 2006 GTO wich is running a LS2 motor. Obviously this motor is running a much higher compression ratio than our motors.
I know that our motors respond really well to FI due to the lower compression ratio. Hence cars that are running high horspower on high compression motors typically have issues with FI and really cant run much psi. I was hoping someone could explain to me why this is true. What does the compression ratio have to do with the motors ability to handle boost. Is it simply the fact the the gasoline will have combustion issues, maybe too much compression means too big of an explosion resulting in a blown motor? I am not that up on this technical stuff. So please lend a hand guys!
One last thing is why then do high compression motors respond so well to cams?
I know that our motors respond really well to FI due to the lower compression ratio. Hence cars that are running high horspower on high compression motors typically have issues with FI and really cant run much psi. I was hoping someone could explain to me why this is true. What does the compression ratio have to do with the motors ability to handle boost. Is it simply the fact the the gasoline will have combustion issues, maybe too much compression means too big of an explosion resulting in a blown motor? I am not that up on this technical stuff. So please lend a hand guys!
One last thing is why then do high compression motors respond so well to cams?
10-27-2007, 12:32 PM
#5
1st Gear Member
Thread Starter
Join Date: May 2007
Location:
Posts: 101
RE: Please help me understand some technical stuff
Is it really that stupid of a question?
I really dont understand the culture on these forums. I cant ask a question without expecting to get railed? Well I hope someone can just give me some straight answers.
I really dont understand the culture on these forums. I cant ask a question without expecting to get railed? Well I hope someone can just give me some straight answers.
10-27-2007, 12:48 PM
#7
S197 Section Modder-ator
Join Date: Sep 2007
Location: Orlando FL
Posts: 13,373
RE: Please help me understand some technical stuff
ORIGINAL: Nelsta21
Is it really that stupid of a question?
I really dont understand the culture on these forums. I cant ask a question without expecting to get railed? Well I hope someone can just give me some straight answers.
Is it really that stupid of a question?
I really dont understand the culture on these forums. I cant ask a question without expecting to get railed? Well I hope someone can just give me some straight answers.
Don't get bend out of shape yet!
And it is a good forum... The knowlegable and smart people in here outweight the occasional @ssholes.
It's not a stupid question. Only if you pretend to know a lot, witch you didn't.
A lot of folks here assume that, every owner, know their car like the back of their hand.
I don't have a scientific answer to your question either, but I know that an engine has a limit of how much compression it will take before it blows.
Naturally aspirated will go 12.5 to 1 no problem ( Diesels beyond that).
Force induced is best (street) at 8 to 1 some like that, because of the extra pressure it amount to inside the conbustion chamber.
Like I said, somebody has the correct numbers for you...
10-27-2007, 12:53 PM
#9
4th Gear Member
Join Date: Dec 2005
Location: Ohioland, Ohio
Posts: 1,324
RE: Please help me understand some technical stuff
ORIGINAL: Nelsta21
So I was sitting down with some friends last night discussing basic car stuff and the issue of high compression, naturally aspirated motors came up. A friend of mine is purchasing a 2006 GTO wich is running a LS2 motor. Obviously this motor is running a much higher compression ratio than our motors.
I know that our motors respond really well to FI due to the lower compression ratio. Hence cars that are running high horspower on high compression motors typically have issues with FI and really cant run much psi. I was hoping someone could explain to me why this is true. What does the compression ratio have to do with the motors ability to handle boost. Is it simply the fact the the gasoline will have combustion issues, maybe too much compression means too big of an explosion resulting in a blown motor? I am not that up on this technical stuff. So please lend a hand guys!
One last thing is why then do high compression motors respond so well to cams?
So I was sitting down with some friends last night discussing basic car stuff and the issue of high compression, naturally aspirated motors came up. A friend of mine is purchasing a 2006 GTO wich is running a LS2 motor. Obviously this motor is running a much higher compression ratio than our motors.
I know that our motors respond really well to FI due to the lower compression ratio. Hence cars that are running high horspower on high compression motors typically have issues with FI and really cant run much psi. I was hoping someone could explain to me why this is true. What does the compression ratio have to do with the motors ability to handle boost. Is it simply the fact the the gasoline will have combustion issues, maybe too much compression means too big of an explosion resulting in a blown motor? I am not that up on this technical stuff. So please lend a hand guys!
One last thing is why then do high compression motors respond so well to cams?
I think its a great question. Id like to see someone chime in and answer it.
10-27-2007, 12:57 PM
#10
S197 Section Modder-ator
Join Date: Sep 2007
Location: Orlando FL
Posts: 13,373
RE: Please help me understand some technical stuff
True.
But guys like fordfanboy or buckman can pin point more accuratly the combination he might need since they know the dos and donts on how to get there.
But guys like fordfanboy or buckman can pin point more accuratly the combination he might need since they know the dos and donts on how to get there.