Jump to content



EGT temps

egt temps

  • Please log in to reply
23 replies to this topic

#1 88whitestarion

88whitestarion

    Member

  • Members
  • PipPip
  • 339 posts
  • Location:Lincoln, NE
  • Interests:Keep the turbo spooled!

Posted 29 November 2016 - 03:58 PM

If anyone is running a EGT guage, let me know what kind of temps you are running. Cruising down the interstate at 75mph, my EGT temps are running about 700 C or nearly 1400 F. I have tried going richer and leaner, nothing seems to help. I thought when I switched to E85 they would cool down some, but I have noticed much difference.

Maybe advancing the timing would help to keep the burn in the cylinder longer.  Maybe that's just there way there are. At night if I open the hood the turbo is glowing, just seems a little too hot for cruising at 75mph.

Thanks,

Dave





#2 Chad

Chad

    noob

  • Moderators
  • PipPipPipPip
  • 9,180 posts
  • Gender:Male
  • Location:Lincoln City Oregon
  • Interests:Starquest Fanatic
  • Model:Conquest

Posted 29 November 2016 - 06:12 PM

What afr?  Where is the sensor mounted?  What color are the plugs?

#3 Zoggy87

Zoggy87

    Member

  • Members
  • PipPip
  • 387 posts
  • Location:USA

Posted 29 November 2016 - 06:50 PM

My turbo only gets around 7-850*f after a moderate wot. It's not factory 12 though. It's a t3t4 hybrid that's bigger. I also don't have a cat, and full 3" turbo back. Typical egt on engines such as ours is around 4-800 at idle and slow cruises. High speed, long cruises will see around 8-1000. W0T should be around 12-1400 max on our engines stock. This is all variable by modifications. Adding header/pipe wrap and or turbo blankets will increase the egt by a noticeable amount. If your car is factory stock, I would verify afr and timing. 75 in our cars is a decent load and would definitely create higher temps, but I can't say if yours is normal

#4 88whitestarion

88whitestarion

    Member

  • Members
  • PipPip
  • 339 posts
  • Location:Lincoln, NE
  • Interests:Keep the turbo spooled!

Posted 30 November 2016 - 11:26 AM

Greddy EGT with T3/T4 GT35 turbo, Chad's header, 3 in exhaust all the way with no cat. EGT is mounted in header before turbo. The night time glowing turbine housing at interstate speeds is my concern. It idles at around 1000 F.

#5 Chad

Chad

    noob

  • Moderators
  • PipPipPipPip
  • 9,180 posts
  • Gender:Male
  • Location:Lincoln City Oregon
  • Interests:Starquest Fanatic
  • Model:Conquest

Posted 30 November 2016 - 12:20 PM

My running Temps were very similar to Zogg87s with a 60-1 T4.  check your plugs, if they are grey or whitish, you are too hot for sure.

Could also be fuel burning in the exhaust tract if the plugs look normal, that would be spark or cam timing problems.

#6 88whitestarion

88whitestarion

    Member

  • Members
  • PipPip
  • 339 posts
  • Location:Lincoln, NE
  • Interests:Keep the turbo spooled!

Posted 30 November 2016 - 10:43 PM

Spark plug insulator is a nice tannish brown. I doubt it's the timing if at idle I'm still at 1000 F and everyone else is considerably lower. It's been like this for over ten years, I don't drive it all that often. Makes good power 475whp and 550 torque. I guess I could try a different camshaft and see if that helps. Difficult to degree cam and crank with the head on and I really don't feel like pulling the head off to check it. Trying a new camshaft might be easier. I am currently running a solid lifter cam I got from TEP 10 years ago. Not sure who else makes a solid lifter cam for these.

Edited by 88whitestarion, 30 November 2016 - 10:44 PM.


#7 Funky Phil

Funky Phil

    Super Pooper

  • Members
  • PipPipPipPip
  • 6,392 posts
  • Gender:Male
  • Location:Hell's microwave TX
  • Interests:2 streaks of fire for 60ft when I leave.
  • Model:Conquest

Posted 30 November 2016 - 11:45 PM

Thats hot and could be one or both ignition and cam timing related.
Cruising can have a lot of advance. Mine is in the 1100ish cruising which is pulled 2" from the head. Those EGTs are good for killing exhaust valves and guides.

What is your ignition advance while cruising? Also could give your cam a turn and see it it helps. I do mine on the dyno.

Tubular header, 68mm turbine wheel, .82AR T3, 3" downpipe only.

Edited by Funky Phil, 30 November 2016 - 11:51 PM.

10.95@122mph MoFuggin stickshift! https://m.youtube.co...h?v=8Q01UKt5q4U

Posted Image

#8 88whitestarion

88whitestarion

    Member

  • Members
  • PipPip
  • 339 posts
  • Location:Lincoln, NE
  • Interests:Keep the turbo spooled!

Posted 01 December 2016 - 03:14 PM

Anyone know where I can pick an adjustable cam gear or solid lifter cam?

#9 importwarrior

importwarrior

    6 Quests and Counting......

  • Moderators
  • PipPipPipPipPip
  • 18,071 posts
  • Gender:Male
  • Location:Manassas VA
  • Interests:Boost = 2KWIK4U
    Starquests
  • Model:Conquest

Posted 01 December 2016 - 04:10 PM

http://www.ebay.com/...=item258a81aa25

http://stores.ebay.c...d=p4634.c0.m322

B-71 87 TSI ~ RIP

Black 87 Starion ~ Mess SOLD!!!

Proud New 89 slightly Rusted Fiji Owner !!!




#10 Funky Phil

Funky Phil

    Super Pooper

  • Members
  • PipPipPipPip
  • 6,392 posts
  • Gender:Male
  • Location:Hell's microwave TX
  • Interests:2 streaks of fire for 60ft when I leave.
  • Model:Conquest

Posted 02 December 2016 - 10:52 PM

View PostZoggy87, on 29 November 2016 - 06:50 PM, said:

My turbo only gets around 7-850*f after a moderate wot. It's not factory 12 though. It's a t3t4 hybrid that's bigger. I also don't have a cat, and full 3" turbo back. Typical egt on engines such as ours is around 4-800 at idle and slow cruises. High speed, long cruises will see around 8-1000. W0T should be around 12-1400 max on our engines stock. This is all variable by modifications. Adding header/pipe wrap and or turbo blankets will increase the egt by a noticeable amount. If your car is factory stock, I would verify afr and timing. 75 in our cars is a decent load and would definitely create higher temps, but I can't say if yours is normal

Where are you pulling EGT from?
10.95@122mph MoFuggin stickshift! https://m.youtube.co...h?v=8Q01UKt5q4U

Posted Image

#11 88whitestarion

88whitestarion

    Member

  • Members
  • PipPip
  • 339 posts
  • Location:Lincoln, NE
  • Interests:Keep the turbo spooled!

Posted 08 December 2016 - 04:03 PM

The EGT probe is in the header, approximately half way between the exhaust manifold flange and the turbo inlet. Temps at idle around 1000 F, 40mph cruise around 1250 F and interstate cruise around 1400 F.  Again, my turbo and header, at night, are glowing if I stop and lift the hood before it cools down. I am thinking about trying a different cam. Anybody know who sells a solid lifter cam for the G54B?

Changing the AFR doesn't seem to do much. I've tried anywhere from 12 to 14.5 cruising and it doesn't seem to matter. Timing is 10 degrees at idle and, I don't recall exactly, but mid to upper 30's cruising. Advancing the timing should keep more of the burn in the cylinder, but it seems I am running plenty of advance.

#12 Chad

Chad

    noob

  • Moderators
  • PipPipPipPip
  • 9,180 posts
  • Gender:Male
  • Location:Lincoln City Oregon
  • Interests:Starquest Fanatic
  • Model:Conquest

Posted 08 December 2016 - 09:09 PM

You are about 250* hotter across the board than the 2 builds I've run with similar aggressive mods, both with EGT's on them.

One was an unknown TEP cam (probably a 284H Schneider) with a T3/4 60-1, the other was a Schneider 294F (mechanical) on a T-4 62-1.  Both those builds had about the same temps as each other.  Header styles were copmletely different on these 2 builds, the temps were about the same.

Is it possible the EGT is no good?  Any K type probe can be used so long as it fits as a sanity check. Thermocouples are not proprietary in voltage output, though there are different types and threads. It generates a high impedance voltage, generated by dissimilar metals, and voltage is proportional to temperature.

#13 Funky Phil

Funky Phil

    Super Pooper

  • Members
  • PipPipPipPip
  • 6,392 posts
  • Gender:Male
  • Location:Hell's microwave TX
  • Interests:2 streaks of fire for 60ft when I leave.
  • Model:Conquest

Posted 09 December 2016 - 12:29 AM

Sounds like you need to advance the cam
10.95@122mph MoFuggin stickshift! https://m.youtube.co...h?v=8Q01UKt5q4U

Posted Image

#14 Chad

Chad

    noob

  • Moderators
  • PipPipPipPip
  • 9,180 posts
  • Gender:Male
  • Location:Lincoln City Oregon
  • Interests:Starquest Fanatic
  • Model:Conquest

Posted 09 December 2016 - 12:15 PM

Simple re-check of your setup, try a stock cam.  If it cools off a lot, you can assume it's a cam problem, if no change, look elsewhere.  Stock cams are pretty safe/tame, so not much risk to the build.

#15 Funky Phil

Funky Phil

    Super Pooper

  • Members
  • PipPipPipPip
  • 6,392 posts
  • Gender:Male
  • Location:Hell's microwave TX
  • Interests:2 streaks of fire for 60ft when I leave.
  • Model:Conquest

Posted 09 December 2016 - 12:18 PM

View Post88whitestarion, on 08 December 2016 - 04:03 PM, said:

The EGT probe is in the header, approximately half way between the exhaust manifold flange and the turbo inlet. Temps at idle around 1000 F, 40mph cruise around 1250 F and interstate cruise around 1400 F.  Again, my turbo and header, at night, are glowing if I stop and lift the hood before it cools down. I am thinking about trying a different cam. Anybody know who sells a solid lifter cam for the G54B?

Changing the AFR doesn't seem to do much. I've tried anywhere from 12 to 14.5 cruising and it doesn't seem to matter. Timing is 10 degrees at idle and, I don't recall exactly, but mid to upper 30's cruising. Advancing the timing should keep more of the burn in the cylinder, but it seems I am running plenty of advance.

I actually noticed a temp increase by cruising with ign above low 30's.
10.95@122mph MoFuggin stickshift! https://m.youtube.co...h?v=8Q01UKt5q4U

Posted Image

#16 88whitestarion

88whitestarion

    Member

  • Members
  • PipPip
  • 339 posts
  • Location:Lincoln, NE
  • Interests:Keep the turbo spooled!

Posted 12 December 2016 - 09:25 PM

I doubt it's the sensor..... the glowing header and turbine don't lie. The cam is a solid lifter cam from TEP. I could try either a new solid lifter cam or adjustable cam gear. I don't have the stock cam to try, not to mention the hydraulic lifters. Anyone know of a good, non TEP, solid lifter cam? If not, I guess it's time to get on ebay and pick up the adjustable cam gear.

#17 Funky Phil

Funky Phil

    Super Pooper

  • Members
  • PipPipPipPip
  • 6,392 posts
  • Gender:Male
  • Location:Hell's microwave TX
  • Interests:2 streaks of fire for 60ft when I leave.
  • Model:Conquest

Posted 13 December 2016 - 12:04 AM

Yes, i say get a gearfor sure!
10.95@122mph MoFuggin stickshift! https://m.youtube.co...h?v=8Q01UKt5q4U

Posted Image

#18 Mach 5

Mach 5

    Member

  • Members
  • PipPip
  • 498 posts
  • Gender:Male
  • Location:West Islip, NY
  • Model:Starion

Posted 17 December 2016 - 09:48 AM

I was just going to post a similar thread asking about this.. mine sits in the realm of 1125 when cruising. 1000 around town and wot I hit 1450 the other day. but I was pounding it pretty hard. don't think it would be safe at the track like that though... turbine/header/dp were glowing as well....

hhmmm

colt cam, t3 3071, jdl header/dp
Owner and Founder of Triple R Motors aka Radical Rev Race Mods- Jarek-
-Rides-
-1987 Starion -Midnight Star - Build Progress see link
http://www.starquest...howtopic=152434
-1989 Chrysler Conquest-Track Beast Mode gtx3071r TBI 365hp 407tq @20psi- RIP
http://www.starquest...ic=151885&st=40
-1989 Pontiac Grand Prix Turbo SE- 3.1 gt4088r getrag284 Tilton twin disc
-1991 Toyota Hilux Pickup 1uz itb cp pistons kelford cams TripleR head porting/ long tubes
-1990 McLaren Turbo Grand Prix sold...
-1985 AE86 20v.. 171hp@ 8200rpm RIP

#19 Funky Phil

Funky Phil

    Super Pooper

  • Members
  • PipPipPipPip
  • 6,392 posts
  • Gender:Male
  • Location:Hell's microwave TX
  • Interests:2 streaks of fire for 60ft when I leave.
  • Model:Conquest

Posted 17 December 2016 - 12:36 PM

I wouldnt be concerned with those egts
10.95@122mph MoFuggin stickshift! https://m.youtube.co...h?v=8Q01UKt5q4U

Posted Image

#20 Mach 5

Mach 5

    Member

  • Members
  • PipPip
  • 498 posts
  • Gender:Male
  • Location:West Islip, NY
  • Model:Starion

Posted 17 December 2016 - 01:08 PM

what about for circuit racing?
Owner and Founder of Triple R Motors aka Radical Rev Race Mods- Jarek-
-Rides-
-1987 Starion -Midnight Star - Build Progress see link
http://www.starquest...howtopic=152434
-1989 Chrysler Conquest-Track Beast Mode gtx3071r TBI 365hp 407tq @20psi- RIP
http://www.starquest...ic=151885&st=40
-1989 Pontiac Grand Prix Turbo SE- 3.1 gt4088r getrag284 Tilton twin disc
-1991 Toyota Hilux Pickup 1uz itb cp pistons kelford cams TripleR head porting/ long tubes
-1990 McLaren Turbo Grand Prix sold...
-1985 AE86 20v.. 171hp@ 8200rpm RIP




0 user(s) are reading this topic

0 members, 0 guests, 0 anonymous users