5.3 heads on ls1?
08-12-2008, 06:03 PM
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5.3 heads on ls1? http://texas-speed.com/shop/item.asp...d=203&catid=47
im confused can someone explain to me why i would want to put 5.3 heads on my 5.7?
im confused can someone explain to me why i would want to put 5.3 heads on my 5.7?
08-12-2008, 06:20 PM
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http://texas-speed.com/shop/item.asp...d=203&catid=47
im confused can someone explain to me why i would want to put 5.3 heads on my 5.7?
im confused can someone explain to me why i would want to put 5.3 heads on my 5.7?
08-12-2008, 06:20 PM
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if you do a search there are tons of info on this, but basically it raises static compression ratio meaning you get more power. also these from texas speed are likely going to flow better as well.
edit damn... i must have been like 5 seconds too late on the post button
but yea... ^^^ and above poster are right
edit damn... i must have been like 5 seconds too late on the post button
but yea... ^^^ and above poster are right 
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08-12-2008, 07:09 PM
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well im actually got a block with a 3.905 bore plan on basically making 383 stroker so do you think i should go with the 5.3 or just go with the ls6 2.5 stage heads and if that was the case why would i want those?
08-12-2008, 07:28 PM
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I would say AFR's, but If you dont have a money tree then the LS6 heads. As far as I know they flow better and you can have them milled to give you the same CR as the 5.3 if you so choose.
08-12-2008, 08:52 PM
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sorry if this jacks the thread but i have a question to ask this since we are on the head thread and dont no if someone on another thread has asked this dont feel like searching hard but i dont really understand compressions so ill ask y does lower compression better for turbo? and y does making higher compression with smaller liter heads make more horespower im srry if that was the stupidest question in the world please dont bash me for it im just curious to know
08-12-2008, 09:09 PM
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Ok lets see If I can explain this...Im sure someone else could but Ill give it a shot!
You NEED lower CR for a FI motor. Think of it like the motor has a maximum CR that if surpassed will damage the motor, just for giggles lets say 12 to 1 CR is max on pump gas. If you are running a high compression motor on pump gas( say 11 to 1) and you add turbo or blower then your CR under boost will be over the 12 to 1 limit and damage the motor. Running a larger CC and consequently a lower CR of say 8 to 1 will allow you to poush more boost while still being under our hypothetical 12 to 1 limit. So lower CR = Good for FI.
Can someone explain the difference between static and other CR's?
You NEED lower CR for a FI motor. Think of it like the motor has a maximum CR that if surpassed will damage the motor, just for giggles lets say 12 to 1 CR is max on pump gas. If you are running a high compression motor on pump gas( say 11 to 1) and you add turbo or blower then your CR under boost will be over the 12 to 1 limit and damage the motor. Running a larger CC and consequently a lower CR of say 8 to 1 will allow you to poush more boost while still being under our hypothetical 12 to 1 limit. So lower CR = Good for FI.
Can someone explain the difference between static and other CR's?
08-12-2008, 09:23 PM
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Ok lets see If I can explain this...Im sure someone else could but Ill give it a shot!
You NEED lower CR for a FI motor. Think of it like the motor has a maximum CR that if surpassed will damage the motor, just for giggles lets say 12 to 1 CR is max on pump gas. If you are running a high compression motor on pump gas( say 11 to 1) and you add turbo or blower then your CR under boost will be over the 12 to 1 limit and damage the motor. Running a larger CC and consequently a lower CR of say 8 to 1 will allow you to poush more boost while still being under our hypothetical 12 to 1 limit. So lower CR = Good for FI.
Can someone explain the difference between static and other CR's?
You NEED lower CR for a FI motor. Think of it like the motor has a maximum CR that if surpassed will damage the motor, just for giggles lets say 12 to 1 CR is max on pump gas. If you are running a high compression motor on pump gas( say 11 to 1) and you add turbo or blower then your CR under boost will be over the 12 to 1 limit and damage the motor. Running a larger CC and consequently a lower CR of say 8 to 1 will allow you to poush more boost while still being under our hypothetical 12 to 1 limit. So lower CR = Good for FI.
Can someone explain the difference between static and other CR's?
dynamic compression ratio- compression ratio when engine is running (same in a N/A application) but much higher when adding boost.
your explanation was right
08-13-2008, 07:57 AM
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Ok lets see If I can explain this...Im sure someone else could but Ill give it a shot!
You NEED lower CR for a FI motor. Think of it like the motor has a maximum CR that if surpassed will damage the motor, just for giggles lets say 12 to 1 CR is max on pump gas. If you are running a high compression motor on pump gas( say 11 to 1) and you add turbo or blower then your CR under boost will be over the 12 to 1 limit and damage the motor. Running a larger CC and consequently a lower CR of say 8 to 1 will allow you to poush more boost while still being under our hypothetical 12 to 1 limit. So lower CR = Good for FI.
Can someone explain the difference between static and other CR's?
You NEED lower CR for a FI motor. Think of it like the motor has a maximum CR that if surpassed will damage the motor, just for giggles lets say 12 to 1 CR is max on pump gas. If you are running a high compression motor on pump gas( say 11 to 1) and you add turbo or blower then your CR under boost will be over the 12 to 1 limit and damage the motor. Running a larger CC and consequently a lower CR of say 8 to 1 will allow you to poush more boost while still being under our hypothetical 12 to 1 limit. So lower CR = Good for FI.
Can someone explain the difference between static and other CR's?