Ok in a sinch here is my setup

D16Y8 with CP pistons eagle rods, Head is fully ported 1mm over valves.
Turbo is a t3t4 .51 comp and a .63 a/r exhaust
510cc injectors

Ok my egts are going over 1400 hitting 1500 and on a long haul 1550.

I tried to back off my timing to 14 advance at 8psi and no go the egt gauge pegs 1600. So i put it to 17 and its stays at about 1400ish creeps up to 1500.

This is anoying me or maybe i worry to much oh and my air fuel are 11.4-11.6

 

 

Well, as long as the air/fuels are stable like you say, then you just need more timing. Your essentially still burning mixture in the mani and it's in turn heating the egt probe showing a higher reading.

Looking at those maps your ignition is highly conservative versus single cams I've tuned on pump. You definitely could use more timing. Get a couple sets of plugs, starting creeping in ignition timing slowly and just coupling what your gauges are telling you along with plug reading and looking at the ground strap for true combustion temp.

 

Cause i pulled the plugs last night and they were all darkish brown except for #3 being a bit lighter.

My intake temps are at 80-85 deg F

I added a bit more fuel 5% more to cyl 3

Im going to put the timing back up to 2 more deg in 8psi and so forth,

Caues im noticing with the lower timing alot more missfires

 

BUMP for info

 

Just get it on a dyno to check for how much timing you need. Dont rely on the egt so much. Checking plugs and a dyno will get you to where you need to be.

 

Air/fuel is good. Timing is low. 17* is a step in the right direction, but I've seen a few tunes on here(pumpgas, higher boost) with total timing in the low 20's.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by SOHC_MShue &raquo;</TD></TR><TR><TD CLASS="quote">Just get it on a dyno to check for how much timing you need. Dont rely on the egt so much. Checking plugs and a dyno will get you to where you need to be. </TD></TR></TABLE>

Dyno would be ideal.

Keep adding timing until either the power plateus/falls-off or it starts to detonate. Then pull the timing back a few degrees and you have your safe level that will make the best power while still giving a bit of buffer against detonation. Keep an eye on your plugs while it's making passes just to make sure it doesn't start to detonate.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by JDMCRX &raquo;</TD></TR><TR><TD CLASS="quote">....maybe i worry to much...</TD></TR></TABLE>
I think you might be. Who told you that 1400-1500 was too high? Alot of people see those sort of temps. As said above, I would be more concerned with the wideband/timing/and plugs.

 

yeah but worrying is good, d-series run best right on the verge on detonation its a fine threshold.

 

Anything will run it's best on the verge of detonation...Generally, the more timing you run, the more power it will make.

But you'll be pissed the first time you get gas that just isn't as good as the gas you tuned on...If the tune's on such a fine line between running and detonating. Especially in boosted/nitrous setups.

 

Y8's are a totally different animal.

This car needs to see a dyno before it gets blown up.

 

thats correct, y8s and z6's differ greatly timing wise... high egt's are usually because of a lean mixture.. what cyl are you monitoring egt's off of?? and also what octane gas... thus 17 degrees @ 8 psi with forged internals, is a bit low... I do recomend a dyno tune rather than driving around and playing with timing..good luck bro

 

Yeah this is what Ive know the d's are alot different then the B's. I do worry to much lol,cause people put there little .02 cents saying im running to much timing and i can argue them tell im blue in the face. Im storing the car for winter so next year ill slap it on the dyno

We are getting snow here now so no more turbo car.

Ill take it out tonight and post up some more maps and see how it goes.

 

you can run more timing in hondata than crome, but on the y8's i've tuned with crome at least they have reached mbt at timing lower than what you are running even. I wouldn't be suprised though if your timing in hondata is perfectly fine.

This is probably why so many people tell you to run less timing.

 

It's not even just D VS B, it's Y8 vs everything else.

 

dito

 

i run 10* @ 25 psi on my z6.. your bieng too conservative add that timing man

 

Well slapped the new map in it at 17deg and the car pulls alot harder lights up the top of 2nd alot harder then yesturday. im gonna put the boost to 15 psi tonight

 

I installed an EGT in my car back when it was bone stock and 1500* F is normal for highway cruising.

 

my timing maps.. dynotuned 403whp

 

What type of gas was you tune on, and spark plugs..

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by THEDirtyDseriesWOOT &raquo;</TD></TR><TR><TD CLASS="quote">i run 10* @ 25 psi on my z6.. your bieng too conservative add that timing man</TD></TR></TABLE>
Its a different motor and different kind of gas. Its not that conservative for his setup.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by SOHC_MShue &raquo;</TD></TR><TR><TD CLASS="quote">
Its a different motor and different kind of gas. Its not that conservative for his setup. </TD></TR></TABLE>

Exactly I don't know why dirtyD is posting his sheets. I might as well post up my IS300's map tables .

Your maps look OK, but just because you loose EGT by adding timing doesn't mean that's good. Detonation actually runs cold and will show on EGT's. Run less timing...a lot less and see if that helps. 1-2 degrees sometimes doesn't do much .

On a personal note I hate tuning Y8's they always have something weird with them .

 

actually thats my pump gas map... just a z6..

i only boost 18psi on that map..