tuning difference's between 6 port/4 port
05-09-12, 05:03 PM
#1
Full Member
Thread Starter
Join Date: Jan 2008
Location: idaho
Posts: 232
Likes: 0
Received 0 Likes
on
0 Posts
tuning difference's between 6 port/4 port
I am still tuning my 6-port and was curious to see what you all did differently between the two blocks. I've read that tuning a 6p is different than tuning a 4p.
what kind of numbers do you like for A/F?
same goes for timing? max advance, rpm
mine is a 6-hbp, sec. bridge. s4 block. e6k. looks like a corksport header?
my tuning is not very good, and only a 16.001 at track. hp calculator said that's 144 at the flywheel?
would it run any different/better if I was tuning TPS/ map?
what kind of numbers do you like for A/F?
same goes for timing? max advance, rpm
mine is a 6-hbp, sec. bridge. s4 block. e6k. looks like a corksport header?
my tuning is not very good, and only a 16.001 at track. hp calculator said that's 144 at the flywheel?
would it run any different/better if I was tuning TPS/ map?
05-11-12, 02:48 PM
#2
Moderator
iTrader: (3)
Join Date: Mar 2001
Location: https://www2.mazda.com/en/100th/
Posts: 30,763
Received 2,556 Likes
on
1,819 Posts
i would approach tuning the 4 port and 6 port engines the same, you might get different results between the two, but the procedure you use should be the same for both.
you really should try a range of air fuel ratios and see what the engine wants, a stock ignition engine will make more power when its leaner, because the ignition power goes down over 6000rpm, and leaner is easier to ignite.
for mixtures, it depends on the overall power output, and if you have a cat, and intended use. if you have a cat, the mixture needs to be rich to keep EGT's down. actually if you have an EGT gauge, you can just tune to a max egt temp. if the egt probe is 2-3" away from the port you want to shoot for 920-950c, and your max temp on stock seals is 1100c.
for timing it seems that you want the leading to be anywhere from 18BTDC to about 27BTDC. if you have a dyno you wanna try a few settings. you want the least amount of timing you can make power with. i would also tune the fuel first, pick something safe, like 12.5:1 and then try timing
if you don't get greedy, you'll have an engine that is happy and runs forever.
its easier on a dyno, but you could go old school, and do timed runs, or run a datalog and see how long each gear takes
you really should try a range of air fuel ratios and see what the engine wants, a stock ignition engine will make more power when its leaner, because the ignition power goes down over 6000rpm, and leaner is easier to ignite.
for mixtures, it depends on the overall power output, and if you have a cat, and intended use. if you have a cat, the mixture needs to be rich to keep EGT's down. actually if you have an EGT gauge, you can just tune to a max egt temp. if the egt probe is 2-3" away from the port you want to shoot for 920-950c, and your max temp on stock seals is 1100c.
for timing it seems that you want the leading to be anywhere from 18BTDC to about 27BTDC. if you have a dyno you wanna try a few settings. you want the least amount of timing you can make power with. i would also tune the fuel first, pick something safe, like 12.5:1 and then try timing
if you don't get greedy, you'll have an engine that is happy and runs forever.
its easier on a dyno, but you could go old school, and do timed runs, or run a datalog and see how long each gear takes
Thread
Thread Starter
Forum
Replies
Last Post
Skeese
Adaptronic Engine Mgmt - AUS
65
03-28-17 03:30 PM
