cant get away from 1600 degrees??

[NewB2dsm]

Ok i just put in 550's and a safc today. Well no matter what i do it goes to 1600 and sits there. Right now its at -5% pretty much across the board. The only way i can get anything but 1600 is turning it up to +5% or down to -15% it will go higher than 1600.

Im running 18psi so i guess im getting knock or somthing and retarding timing and that is causing the high egts? Anyone have anyideas?

here are my mods..

ported 16g w/ 34mm flapper
ported evo o2 housing
custom dp
3" highflow cat
rsr catback
supra sidemount IC
uicp w/ 1g bov
walbro 190 pump
550's
safc

i think thats it..

any help would be great.

 

[NJR Racing]

i had a similar problem when i installed my egt gauge...what i did was tap the the npt fitting to deep..when i installed the probe the tip of the probe was touching the bottom of the manifold.....it ended up melting it.....at +5% on the afc with 550's you shouldnt be hitting 1600f......

 

[Mike 99GSX]

What EGT gauge and probe do you have? If you really want to know what's going on, you need to get a logger. The EGT gauge is only going to be so accurate, especially if your mixing 1 probe with another gauge. I'm pretty convinced that my TRE Probe/Autometer gauge isn't calibrated great. I go a good ways over 1600 since I changed the probe to the TRE. I log good timing adavnce in 3rd gear and 4th even on pump gas so I know its not knocking, but the EGTS still go way over 1600. This probe is way more resonsive than the Autometer but the Autometer never went this high. My point is that 1 of them are wrong (I mean like 75-100 degrees diff) and thats why I wouldn't put complete faith in it.

 

[doug]

If you can go to a dyno that has a wideband O2 hookup on it, that'd show you your A/F ratio. I got mine done a couple weeks ago. Somebody told me, however, that a wideband O2 readout isn't very accurate either, though. I'd never heard that one before-- can anyone confirm this?

 

[NewB2dsm]

I have a TRE egt probe tapped 6" away from head on runner #1. Also it was hot out the other day and today so 18psi could be too much for the heat even with the 550's. and i have the westech egt guage cheap guage but still it has worked in the past i guess.

But anyway should i try and unscrew the probe a little bit and see what happens?

Also i know i need a logger but i still think i can get a pretty good tune, not great but pretty good with my egt and a modifed wot a/f guage. I just didnt (i do now to some degree) the point in spending 300 dollars or so on a logger that could only tell me my timing, well tells more but the only thing that counts is timing. Thanks again guys

 

[Mike 99GSX]

Originally posted by NewB2dsm
I just didnt (i do now to some degree) the point in spending 300 dollars or so on a logger that could only tell me my timing, well tells more but the only thing that counts is timing. Thanks again guys

Best $300 you can spend on mods at the stage you're at. I can almost guarantee you're ETs will improve

 

[NewB2dsm]

yea, well now i have to find an extra 300 bones to buy more goodies for the talon. Oh well who thinks i can hit 12's on pump gas? thats my goal for the car basicly.