with this map, at cruise my EGTs are between 1000 and 1150, under slight boost it goes to about 1250...much better than my previous 12-1300 cruise and 1400+ in boost
very strange I changed my map and still under vac get around 1200-1250 during cruise at 45mph. When I get up near 60mph it gets around 1400-1450. I had heard 1400-1500 is ok for cruising, but then heard 1k-1200 like you have is where its suppose to be. I havent tried any boosting yet....was going to wait till I brought it to a tuner to tune it. I wonder why mine is higher than yours?
edit: then again your built srt4 motor as well right? I am still stock motor with basic upgrades like oil pump, shafts taken out, 2.0 cams, etc
yeah, I have a much larger turbo....20g, which may account for some of it, not 100% sure really
I have forged pistons, rods, etc...but my compression ratio is 9:1...using SRT stage 0 injectors, running 60psi fuel pressure...all things that can make a difference....the biggest thing though is of course the timing....made the biggest change...cooled down the engine a lot
I am also running 2.0L cams and removed BS....I havent messed with dialing the 2.0L cams in yet either...have you?
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Last edited by wicked93gs : 10-06-2007 at 03:55 PM.
yeah, I have a much larger turbo....20g, which may account for some of it, not 100% sure really
I have forged pistons, rods, etc...but my compression ratio is 9:1...using SRT stage 0 injectors, running 60psi fuel pressure...all things that can make a difference....the biggest thing though is of course the timing....made the biggest change...cooled down the engine a lot
I am also running 2.0L cams and removed BS....I havent messed with dialing the 2.0L cams in yet either...have you?
I have a gt35R turbo with GT40 wheel. I set the cams by seat of pants...-3 exhaust and +2 intake. Of coarse I will go to dyno which will be in next month or so and get it all tuned out. I am still stock motor besides oil pump, windage tray, crank scraper, baffle, 2.0 cams, and top end oil modifier....so nothing as far as an "upgrade" really besides the pump and taking the shafts out.
just decided to make a short vid returning home tonight. This is cruising and the EGT's being around 1500...slowing to 60 and the EGT going down to 1400. Also as you can see for some strange reason at time around the 2k mark the a/f will hang and stay at 16.00 for some reason....I am sure its in the tune obviously, but havent quite figured it out.
its hard to get a good view of the EGT gauge(I hate white face gauges that light up all the way at night) I was thinking though that my EGTs are probably mostly due to difference in compression since the rest of our setup is rather similar...except I dont know what my AFR really is since I have yet to get my wideband fixed(I think i fried it) I've been limp mode tuning by sparkplug and EGT to a small degree, according to the plugs, cruise is pretty damn close to stoich, just a touch on the rich side,same for low boost
but back to the compression difference...wouldn't the extra compression cause a more complete burn? reducing the amount of wasted fuel and thereby lowering EGTs?(actually I have no idea, just shooting random ideas out) or maybe since I dont have my cams dialed in yet, I have some small amount of overlap, allowing a bit of air to escape causing lower EGTs due to less air? what size injectors are you running?
just decided to make a short vid returning home tonight. This is cruising and the EGT's being around 1500...slowing to 60 and the EGT going down to 1400. Also as you can see for some strange reason at time around the 2k mark the a/f will hang and stay at 16.00 for some reason....I am sure its in the tune obviously, but havent quite figured it out.
your car is stumbling at 2k rpms. I bet if you hold it there for a while your will throw a cel and it will hiccup bad.
just decided to make a short vid returning home tonight. This is cruising and the EGT's being around 1500...slowing to 60 and the EGT going down to 1400. Also as you can see for some strange reason at time around the 2k mark the a/f will hang and stay at 16.00 for some reason....I am sure its in the tune obviously, but havent quite figured it out.
your car is stumbling at 2k rpms. I bet if you hold it there for a while your will throw a cel and it will hiccup bad.
Its has hiccuped in that spot yes if I hold it there, but i always have a cell since I switched to he MS . I dunno why its stumbling though like that. If I just press the gas more then usual in that area it will go right through the 2k mark without any hiccups. Not sure if I need to add more timing or what.
its hard to get a good view of the EGT gauge(I hate white face gauges that light up all the way at night) I was thinking though that my EGTs are probably mostly due to difference in compression since the rest of our setup is rather similar...except I dont know what my AFR really is since I have yet to get my wideband fixed(I think i fried it) I've been limp mode tuning by sparkplug and EGT to a small degree, according to the plugs, cruise is pretty damn close to stoich, just a touch on the rich side,same for low boost
but back to the compression difference...wouldn't the extra compression cause a more complete burn? reducing the amount of wasted fuel and thereby lowering EGTs?(actually I have no idea, just shooting random ideas out) or maybe since I dont have my cams dialed in yet, I have some small amount of overlap, allowing a bit of air to escape causing lower EGTs due to less air? what size injectors are you running?
Yea it was a pain in the butt to try and get a good view of the egt gauge. I dont know if extra compression would cause a more complete burn. I am running 750cc injectors at 43-35psi on the fuel regulator...hard to exactly tell.
I have a feeling you need more timing. 1400 degree EGTs at cruise will have a tendency to warp stuff, prematurely destroy gaskets, etc.
well thats not comforting.... here is what I have currently right now.
Edit: Where should I go up in my timing? I know the stock srt map shows timing going in the high 40's, but scared to do it.......or should I just change and up the timing? The car made a huge idle difference going from 16 degrees at idle to the 35 I have it at now. I had heard as long as its between 1400-1500 it was ok...., but also heard it needs to be down near 1k.
somehow my kpa values changed on the side up there....I have 4.0 map sensor is reason it was changed in the first place.....dont need to fix that until I bring to get tuned anyhow since I wont be boosting heavy until then.
like I said, I use the map I posted earlier, and it has awesome part throttle driveability(again, under 5psi because thats all I'm boosting currently) and I have 9:1 compression, so you should damn well be safe on 8:1, oh and if you dont feel like plugging in the numbers I put up my MSQ on boostjunkies map database page finally, you can download the msq, export the vex and use it on yours
heres my fuel map for reference...again though...measley stage 0s
just decided to make a short vid returning home tonight. This is cruising and the EGT's being around 1500...slowing to 60 and the EGT going down to 1400. Also as you can see for some strange reason at time around the 2k mark the a/f will hang and stay at 16.00 for some reason....I am sure its in the tune obviously, but havent quite figured it out.
your car is stumbling at 2k rpms. I bet if you hold it there for a while your will throw a cel and it will hiccup bad.
Its has hiccuped in that spot yes if I hold it there, but i always have a cell since I switched to he MS . I dunno why its stumbling though like that. If I just press the gas more then usual in that area it will go right through the 2k mark without any hiccups. Not sure if I need to add more timing or what.
yeah you can rev past it but its still stumbling. It's the same thing that has been plaguing me for a while. I am starting to think that since I dont have EVERYTHING that the ASD controls running on the MS, even know I have the ASD bypassed, its still causing trouble
like I said, I use the map I posted earlier, and it has awesome part throttle driveability(again, under 5psi because thats all I'm boosting currently) and I have 9:1 compression, so you should damn well be safe on 8:1, oh and if you dont feel like plugging in the numbers I put up my MSQ on boostjunkies map database page finally, you can download the msq, export the vex and use it on yours
heres my fuel map for reference...again though...measley stage 0s
I bumped my timing up to 42 degrees in the 1700-2300rpm area. Last night I was at 1500 degrees or just below it in the vid....tonight going to the movies at 75mph I am at around 1375 degrees....almost 1400. When I drop to 60mph or less it gets down to about 1250-1300. At idle at a light it gets down to around 1k after about 10 seconds. Depending on how long I sit at the light it can get as low as 800. I am still running high 13's to low 14's air/fuel for the most part....thinking of maybe leaning it out a tad bit to raise the a/f to mid to high 14's. That may raise the temp, but dunno.
What I dont get....is why is the AEM stock srt map WAYY less than the one posted here?
Then again I was running a very similar spark setup to whats attached here and had higher egt's.....I dont know which one to use. Obviously higher spark is better to lower egt's, but wow does my car sound like a pissed off john deer at idle.
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. I dunno why its stumbling though like that. If I just press the gas more then usual in that area it will go right through the 2k mark without any hiccups. Not sure if I need to add more timing or what.
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