no power with vtec
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MaaseyRacer
Senior Member
screw 89 octane you need 91 or higher if you are running an sirII
rudeludenotmeanthough
Senior Member
Run str-eitght header. I gaurantee your cat is clogged. try running straight header.
Originally posted by xyswany+Nov 4 2003, 09:28 PM-->
the only reason for running higher octane than 87 would be if you had high compression or some sort of forced induction which i dont belive you have. i would check your vtec solenoid.
Because of vtec you end up running a higher commpression and you are inducing more air! That is why they it tells you in that manual to put in a minimum of 89 or higher!
liquid00meth
Senior Member
Originally posted by SLA@Nov 4 2003, 09:37 PM
Doesn't more air plus more fuel = more compression?
no.
compression is just that, how much the air and fuel is compressed. The actual amount of air and fuel has nothing to do with it, until you start looking at boost and static vs. effective compression.
liquid00meth
Senior Member
Originally posted by SLA+Nov 4 2003, 09:32 PM-->
Because of vtec you end up running a higher commpression and you are inducing more air! That is why they it tells you in that manual to put in a minimum of 89 or higher!
holy shit people, stop talking.
VTEC has nothing to do with compression. The compression ratio has nothing to do with a camshaft, or the camshaft profile. Compression has to do with your pistons and the combustion chamber. Honda performance motors especially, have the SAME high compression NO MATTER WHAT. Higher octane fuel is used so that it resists exploding prematurely when it is compressed by the motor.
Id get into more about how compression = heat and whatnot, but I think its better to let the basics sink in a bit.
swanny
Senior Member
Originally posted by liquid00meth+Nov 4 2003, 10:58 PM-->
Because of vtec you end up running a higher commpression and you are inducing more air! That is why they it tells you in that manual to put in a minimum of 89 or higher!
holy shit people, stop talking.
VTEC has nothing to do with compression. The compression ratio has nothing to do with a camshaft, or the camshaft profile. Compression has to do with your pistons and the combustion chamber. Honda performance motors especially, have the SAME high compression NO MATTER WHAT. Higher octane fuel is used so that it resists exploding prematurely when it is compressed by the motor.
Id get into more about how compression = heat and whatnot, but I think its better to let the basics sink in a bit.
just for the record i wasnt saying vtec has an effect on compression or anything like that.
rudeludenotmeanthough
Senior Member
Would you guys just quit arguing?!?!?! Instead of bickering in this guiys thread START YOUR OWN!
Damn i wish i was a mod so i could delete most of this crap.
To answer the ORIGINAL post, i believe your catalitic converter is clogged. My friends civic SI was having the EXACT same symptoms as you are describing. Try running your car with straight header (no exaust connected) and see if that solves the problem. If it doe, change the catalytic converter.
IT HAS NOTHING TO DO WITH THE FUEL YOU USE!
Do the simple test that i psuggested, and post your results.
Thank you and have a nice day.
Damn i wish i was a mod so i could delete most of this crap.
To answer the ORIGINAL post, i believe your catalitic converter is clogged. My friends civic SI was having the EXACT same symptoms as you are describing. Try running your car with straight header (no exaust connected) and see if that solves the problem. If it doe, change the catalytic converter.
IT HAS NOTHING TO DO WITH THE FUEL YOU USE!
Do the simple test that i psuggested, and post your results.
Thank you and have a nice day.
