Cost to benefit: oversize valves?
03-22-2011, 05:38 PM
#1
Honda-Tech Member
Thread Starter
Cost to benefit: oversize valves?
Mild build up of a f22a. 86mm bore by 95mm stroke, bisi stage 2 cams, and 12.1 pistons and more, those are just the basics.
Now anyways, bisi just added new valves you can buy on their site. +2mm intake and +1mm exhaust. That seems TOO big for a street motor but other than that the only other option seems to be +.5mm valves. Does a motor like this really NEED bigger valves? Or would i just be throwin money away for nothing? I havent really seen a lot of people mention going bigger on here, and some even swear by the stock valves with just a valve job.
Any opinions welcomed, thanks!
Now anyways, bisi just added new valves you can buy on their site. +2mm intake and +1mm exhaust. That seems TOO big for a street motor but other than that the only other option seems to be +.5mm valves. Does a motor like this really NEED bigger valves? Or would i just be throwin money away for nothing? I havent really seen a lot of people mention going bigger on here, and some even swear by the stock valves with just a valve job.
Any opinions welcomed, thanks!
03-22-2011, 06:21 PM
#2
Honda-Tech Member
Re: Cost to benefit: oversize valves?
how high are you planning on revving? you might benifit from a larger valve if your going to rev to 9k and only need power up top.
for a street engine...well unless you work it into the design the gains will be almost nil.
Now say if you had plans on maybe adding a bit of juice down the road or something then its a different story
for a street engine...well unless you work it into the design the gains will be almost nil.
Now say if you had plans on maybe adding a bit of juice down the road or something then its a different story
03-22-2011, 07:23 PM
#3
Honda-Tech Member
Thread Starter
Re: Cost to benefit: oversize valves?
how high are you planning on revving? you might benifit from a larger valve if your going to rev to 9k and only need power up top.
for a street engine...well unless you work it into the design the gains will be almost nil.
Now say if you had plans on maybe adding a bit of juice down the road or something then its a different story
for a street engine...well unless you work it into the design the gains will be almost nil.
Now say if you had plans on maybe adding a bit of juice down the road or something then its a different story
Guess they arent really worth it for my application. I figure if i end up re-sleeving and boring out to 89mm and go for broke with that 100mm stroker crank i'd benefit more.
03-22-2011, 08:27 PM
#5
Honda-Tech Member
Re: Cost to benefit: oversize valves?
Mild build up of a f22a. 86mm bore by 95mm stroke, bisi stage 2 cams, and 12.1 pistons and more, those are just the basics.
Now anyways, bisi just added new valves you can buy on their site. +2mm intake and +1mm exhaust. That seems TOO big for a street motor but other than that the only other option seems to be +.5mm valves. Does a motor like this really NEED bigger valves? Or would i just be throwin money away for nothing? I havent really seen a lot of people mention going bigger on here, and some even swear by the stock valves with just a valve job.
Any opinions welcomed, thanks!
Now anyways, bisi just added new valves you can buy on their site. +2mm intake and +1mm exhaust. That seems TOO big for a street motor but other than that the only other option seems to be +.5mm valves. Does a motor like this really NEED bigger valves? Or would i just be throwin money away for nothing? I havent really seen a lot of people mention going bigger on here, and some even swear by the stock valves with just a valve job.
Any opinions welcomed, thanks!
he is definetly the master of the f series.
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