what kinda numbers?
10-10-2010, 09:23 PM
#41
I agree the heads and cam are where its at. The car I bought already had a nice cam in it. I just needed pistons so I got a set and the heads are stock, should have got them ported but didn't.may pull them off this winter and do it. If I could find a lt4 intake I have a nice set of heads already to go with it.
10-11-2010, 07:47 AM
#44
Launching!
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Hates MY input? 
Speak for yourself there, champ. This guy obviously doesn't know what he's dealing with considering he thinks he has a 125cc domed piston...
And how did I NOT explain anything?
What's all this then?:
not at the expense of slow flame travel, piston weight, and a more inefficient combustion chamber. A dome piston on an LT1 is just retarded. If you want more compression, use a smaller combustion chamber, thinner head gasket, and a decked block. Pistons are only 20% of the compression ratio equation.
There are three main types of pistons - dished, flat-top and domed. A dished piston has a type of "dish" in the top of it. A flat-top is obviously flat, while a domed piston has (go figure) a dome shape to it in order to increase compression (but also reduced flame travel).
Show me a piston that has a 125cc dome. You obviously have a typo or some BAD info. That's a 7 1/2"^3 dome. About the size of a pack of cigarettes, per piston.
I always explain my reasonings, not like you who can't even describe what "limp mode" is. I'm not here to get thank yous - just trying to share my experiences so that other people can gather the necessary information to make the right decisions. Take it or leave it - it doesn't bother me either way.
Speak for yourself there, champ. This guy obviously doesn't know what he's dealing with considering he thinks he has a 125cc domed piston...And how did I NOT explain anything?
What's all this then?:not at the expense of slow flame travel, piston weight, and a more inefficient combustion chamber. A dome piston on an LT1 is just retarded. If you want more compression, use a smaller combustion chamber, thinner head gasket, and a decked block. Pistons are only 20% of the compression ratio equation.
There are three main types of pistons - dished, flat-top and domed. A dished piston has a type of "dish" in the top of it. A flat-top is obviously flat, while a domed piston has (go figure) a dome shape to it in order to increase compression (but also reduced flame travel).
Show me a piston that has a 125cc dome. You obviously have a typo or some BAD info. That's a 7 1/2"^3 dome. About the size of a pack of cigarettes, per piston.
I always explain my reasonings, not like you who can't even describe what "limp mode" is. I'm not here to get thank yous - just trying to share my experiences so that other people can gather the necessary information to make the right decisions. Take it or leave it - it doesn't bother me either way.
10-11-2010, 09:25 AM
#46
True limp mode is a PCM condition when the PCM loses most ALL of it's critical inputs. Very rarely does this happen. What most people consider "limp mode" is when one or two inputs are lost and the PCM defaults to a predetermined set of values (either by internal tables or making "educated guesses" from other sensors) for those inputs that are lost - it's basically just guessing. This is not "limp home mode", a term that is grossly overused and mostly misunderstood.