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Curious George
'99 LX Civic Sedan
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3,569 Posts
Discussion Starter #1 (Edited)
Hey guys, I've made many street tuning with my setup.

This is roughly the list,

d16y7
y8 manifold matched to 60mm tb
bisi level 2 cam
4-2-1, test pipe 2.25 exhaust.

After several AFR adjustement, everything is around 13.5:1, I get a fuckin' hole in the fuel map, and also in power band between 3000 and 5000rpm @ WOT.

What should I do ? playing with ignition or replace all the ignition map ? cam gear ? something else ?

I have joined 3d map of ignition and fuel, and also my Crome .bin file.

Thank you
 

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Registered
1993 Cobra
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4,036 Posts
Your timing looks really good. I went ahead and did a little fix to the fuel problem.

Edit: Your timing between the 3000-5000 range was all over the place. I went in a smoothed it out. So go ahead and see what that does for you. :td:
 

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Curious George
'99 LX Civic Sedan
Joined
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3,569 Posts
Discussion Starter #4
What did you do ? Doing smoothing option in crome ?

I want to understand what you did and why !

Thank you
 

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Curious George
'99 LX Civic Sedan
Joined
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3,569 Posts
Discussion Starter #5
I did a double check on mine and your, and finally find that the 'fuel' hole I had between 3500 and 5000, you put more timing on this area and by this way added more fuel.

How can I tune without a dyno ignition timing ?
 

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Registered
1993 Cobra
Joined
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4,036 Posts
What did you do ? Doing smoothing option in crome ?

I want to understand what you did and why !

Thank you
I NEVER use the smoothing option. Your timing was going down in the middle of two cells that were going up. I matched the cells around your problem rpm window of 3k-5k. Also, the same thing with your fuel was happening. That will cause the power loss that your feeling. I tuned my b7 map as linear as possible for the smoothest acceleration and powerband as possible.

...plus it helps me that your non-vtec and thats what im good at tuning. :bigok:
 

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Curious George
'99 LX Civic Sedan
Joined
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3,569 Posts
Discussion Starter #7
I NEVER use the smoothing option. Your timing was going down in the middle of two cells that were going up. I matched the cells around your problem rpm window of 3k-5k. Also, the same thing with your fuel was happening. That will cause the power loss that your feeling. I tuned my b7 map as linear as possible for the smoothest acceleration and powerband as possible.

...plus it helps me that your non-vtec and thats what im good at tuning. :bigok:
Ok I see !

Without a dyno it's hard to see, but I might get some good street tuning restult.

I love non vtec setup, easy to check mapping and what is exactly happening.


After that, should I tune back AFR ? if is still a fuel hole after that, do I need to add a bit more timing in this region ?

Thank you
 

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Registered
1993 Cobra
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4,036 Posts
run it and see. If you see your self having to pull timing and fuel, then i would look into other factors causing this like intake and exhaust setup. Also, your dizzy timing too.
 

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Curious George
'99 LX Civic Sedan
Joined
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3,569 Posts
Discussion Starter #10
run it and see. If you see your self having to pull timing and fuel, then i would look into other factors causing this like intake and exhaust setup. Also, your dizzy timing too.
I just burnt the chip, I will try it probably tomorrow afternoon, and I will tell you how it run. I will keep in mind your advice about smother fuel and timing curves, it should give more linear power, and lesser peaky.

I'm just playing right now with this setup, I'm going in few months turbo, but map base under vacuum to 0 condition will be done.

Thank you
 

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Registered
97 honda coupe
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7,611 Posts
I just burnt the chip, I will try it probably tomorrow afternoon, and I will tell you how it run. I will keep in mind your advice about smother fuel and timing curves, it should give more linear power, and lesser peaky.

I'm just playing right now with this setup, I'm going in few months turbo, but map base under vacuum to 0 condition will be done.

Thank you
Im going to give it a try right now, ill tell you how the low cam map works on my z6/y8 block.
 

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Curious George
'99 LX Civic Sedan
Joined
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3,569 Posts
Discussion Starter #12
Im going to give it a try right now, ill tell you how the low cam map works on my z6/y8 block.
I think you should use the high cam,

Bisi level two has big lift and good diuration, need very much fuel over the stock cam. Injectors are near to be maxed out, 89% of duty cycle, it's enough to be reliable.
 

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Classic Man
Civic
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16,355 Posts
if u want to tune your timing on the street get a det can, and advance your timing and listen for detonation

when you hear it, back it out a few degrees and retest
 

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Curious George
'99 LX Civic Sedan
Joined
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3,569 Posts
Discussion Starter #14
if u want to tune your timing on the street get a det can, and advance your timing and listen for detonation

when you hear it, back it out a few degrees and retest
Is the best power It should made is just below the knocking level ?
 

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Registered
1993 Cobra
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4,036 Posts
yeah, you will always here a little detonation. But it shouldnt sound like your car is pooping out pots and pans. lol
 

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Registered
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230 Posts
are you using a aftermarket cam gear? or a Y7 cam gear ? if so did you compensate for the 4.5 degree offset between obd2 and obd 1 ? make sure your ecu timing is in sync with mechanical timing
IE: looking at your maps your running 16 degrees base timing , make sure that is in sync with the dizzy.
lots of threads about that I dont want to get into it haha . just search and you shall find.
. very important. not being synced can cause power loss problems.
 

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Curious George
'99 LX Civic Sedan
Joined
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3,569 Posts
Discussion Starter #19
my pleasure :)

Theres actually alot more in that map, the timing is very conservative.
Lol can I have my part please ? If I remember I did 95% of that :p
 

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Curious George
'99 LX Civic Sedan
Joined
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3,569 Posts
Discussion Starter #20
are you using a aftermarket cam gear? or a Y7 cam gear ? if so did you compensate for the 4.5 degree offset between obd2 and obd 1 ? make sure your ecu timing is in sync with mechanical timing
IE: looking at your maps your running 16 degrees base timing , make sure that is in sync with the dizzy.
lots of threads about that I dont want to get into it haha . just search and you shall find.
. very important. not being synced can cause power loss problems.
I'm running @ 16 degrees. Thank you I'm still new to this site.

The qestions are about mapping, not cam gears and dizzy.
 
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