OK after getting my A/F to 11.5 to 11.7 the egts are going pass 1400. 3rd gear pulls the EGTs go pass 1400. NOw ive synced the distrutor to the ecu. Ive run from 7deg to 20 deg of timing and the egts are still out to lunch. Im thinking maybe running back 24deg of timing.

Can anyone shed some light?

 

how r u checking/verifying timing advance? how you ve ifying a/f readings ? what range plugs, how much boost

 

PLX M300 Wide Band. Autometer EGT gauge

Its hondata S300 510cc injectors

 

fuel pump?? how much boost? what motor setup?

 

OK sorry

D16y8 Stock block with arps and block gaurd.
Rev hard turbo 8-9psi
255 welbro fuel pressure is at 40 at idle and full WOT 46psi.

 

so you sync'd timiing? is there adj cam gear?

 

No adjustable cam gear i got one here. The car running map was sitting at 18.5 checked it on the crank pulley 18 deg. Any other sujestions

 

what kind of manifold are you using and where is the EGT probe located?

mine's in a log manifold, 2" from the head but that makes it get the other cylinders' heat also so I see pretty high EGTs even under cruise

 

i also get ridiculously high EGT's with low or high boost. i've seen 1400-1500deg plenty of times. and even when cruising in 5'th gear on the highway it averages around 1100-1200deg.

but I'm pretty sure 90% of my high EGT problems are due to my restrictive exhaust system.

how is your exhaust setup?

 

My exhaust is 2 1/4" all the way threw no cat straight pipe. My egt probe is in the wastegate hole on the 5 bolt turbo housing.

josh

 

im in the same boat..

with a stock ecu and stock motor, exhaust and everything, i got high EGTs with the same autometer gauge.
1.3-1.4k degrees cruising down the highway at ~3k rpm!

now on boost, my EGT gauge is pegged at 1600* at the end of third gear.
the motor is a d15b2 bottom end with a d16a6 head. hf mani and evo3 big 16g turbo. 12.5 psi and an open 2.5" DP.

:edit: dsm450s and a walboro 190 pump.

im running solid AFRs, 11.5-12:1 with ~15* timing on Turboedit. ive tried advancing and retarding timing, no noticable difference. im about to run some colder plugs, i got 7s in there now. ill let you know if there is a difference. im hoping i just have a hot motor but a pegged 1.6k has to be too hot

what kind plugs do you run?


Modified by bch5428 at 1:34 PM 8/3/2006

 

Hmm i wonder why fiddling with timing isn't helping the egt's on your setups. Weird

 

Cast vs Forged pistons seem to make a big difference too.

 

yeah they can retain heat more

 

i just really hope these new colder plugs help.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by bch5428 &raquo;</TD></TR><TR><TD CLASS="quote">i just really hope these new colder plugs help.</TD></TR></TABLE>colder plus might help but water injection will knock it down at least 200 degrees. plus clean the buildup on your pistons.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Boostage &raquo;</TD></TR><TR><TD CLASS="quote">colder plus might help but water injection will knock it down at least 200 degrees. plus clean the buildup on your pistons.</TD></TR></TABLE>

 

i just went from 7s to 8s. i havnt had time to try and to any WOT pulls and some real tuning, but at idle and highway cruising my EGTS are down about 175 degrees. id really like to get into water injection, but i gotta learn how to tune first!

 

Well guys while ago i put the timing back to 23 deg at 8-12psi all the way to 8500 rpm and my egts are now at about 1400.

Cars pulling realy strong and the A/F are 10.7-11.5

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by JDMCRX &raquo;</TD></TR><TR><TD CLASS="quote">Well guys while ago i put the timing back to 23 deg at 8-12psi all the way to 8500 rpm and my egts are now at about 1400.

Cars pulling realy strong and the A/F are 10.7-11.5</TD></TR></TABLE>
your at 23 deg with a y8 at 8-12psi? Are you using race gas?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by JDMCRX &raquo;</TD></TR><TR><TD CLASS="quote">My exhaust is 2 1/4" all the way threw no cat straight pipe. My egt probe is in the wastegate hole on the 5 bolt turbo housing.

josh</TD></TR></TABLE>

It's normal for where your probe is placed.
Myself and another buddy has it placed in the same position, and have EGT temps right where yours are, if not slightly higher. I have had my car tuned twice by different tuners...same result

There's actually a calculation to determine your actual EGT's based on where you put it, and distance away from your head (with many other variables).

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Boostage &raquo;</TD></TR><TR><TD CLASS="quote">colder plus might help but water injection will knock it down at least 200 degrees. plus clean the buildup on your pistons.</TD></TR></TABLE>

water injection is not required. but would drop temps down a lot

Just keep an eye on it for any changes. If it goes up or down noticably, then you should be concerned.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 96BLkGSR &raquo;</TD></TR><TR><TD CLASS="quote">It's normal for where your probe is placed.
Myself and another buddy has it placed in the same position, and have EGT temps right where yours are, if not slightly higher. I have had my car tuned twice by different tuners...same result

There's actually a calculation to determine your actual EGT's based on where you put it, and distance away from your head (with many other variables).
.</TD></TR></TABLE>
remember the further away from your head the lower the egt's will read. If egt's are high after the turbine housing then they will be even higher where they are normally read in one of the manifold runners.

 

update: my colder plugs reduced EGTs atleast 200*!! i went from a pegged 1600, to just over 1400 degrees after multi-gear, WOT pull.

i went from 7s to 8s.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by bch5428 &raquo;</TD></TR><TR><TD CLASS="quote">update: my colder plugs reduced EGTs atleast 200*!! i went from a pegged 1600, to just over 1400 degrees after multi-gear, WOT pull.

i went from 7s to 8s.</TD></TR></TABLE>
around how much power are you at right now?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by bch5428 &raquo;</TD></TR><TR><TD CLASS="quote">update: my colder plugs reduced EGTs atleast 200*!! i went from a pegged 1600, to just over 1400 degrees after multi-gear, WOT pull.

i went from 7s to 8s.</TD></TR></TABLE>

hmmm

1 step colder make such a difference?
interesting