Boosted Iat on pump gas
Thread Starter
Joined: Jun 2005
Posts: 2,265
Likes: 671
From: Oskaloosa, Iowa
No just straight pump 93. The reason I ask is the highest Iat I saw at the track was 104, but it already started pulling timing.
It was my first trip to the track doing my own tuning so I was setup way conservative. Shifting at 6100 rpm with a procharger and only 13 peak timing before it started pulling any. I only trapped the 1/8th at 92 mph. I looked the logs over and was high 10 low 11 AFR as well. Now I've got it shifting at 6550 rpm and 14 peak timing with low 11 AFR. It feels stronger on the street and no KR. I just didn't know if I want to change the iat spark table so it didn't start pulling timing so soon or not. I'm definitely not making the power I should, but think the tune is way to safe. I'm going to go back to the track soon and see what it picks up with these changes.
It was my first trip to the track doing my own tuning so I was setup way conservative. Shifting at 6100 rpm with a procharger and only 13 peak timing before it started pulling any. I only trapped the 1/8th at 92 mph. I looked the logs over and was high 10 low 11 AFR as well. Now I've got it shifting at 6550 rpm and 14 peak timing with low 11 AFR. It feels stronger on the street and no KR. I just didn't know if I want to change the iat spark table so it didn't start pulling timing so soon or not. I'm definitely not making the power I should, but think the tune is way to safe. I'm going to go back to the track soon and see what it picks up with these changes.
Restricted User
Joined: Mar 2014
Posts: 7,192
Likes: 109
From: Ohio
I spray my IAT with my water/meth, so I have it start pulling timing at 110 as a fail safe because IATs don't ever go over 100 while spraying.
Without water/meth, usually ~160 before I pull timing.
Without water/meth, usually ~160 before I pull timing.
Thread Starter
Joined: Jun 2005
Posts: 2,265
Likes: 671
From: Oskaloosa, Iowa
My iat on back to back wot pulls only got up to 104 and ECT never went over 189. No kr and 14 peak timing with it dropping to 10 at about 4800 to 5200 rpm. Sound pretty low on timing still? 9.5 pounds of boost at 6500 rpm on 93 octane. AFR about 11.0
Launching!
Joined: Jan 2002
Posts: 299
Likes: 41
From: Detroit, Murder City
I often find that the OEM values for the spark vs IAT table are really close to what you want. Don't use this table as an excuse to put more total timing into the engine when you can just do that in the base (High Octane) table anyway. You want a tune that automatically compensates for weather changes, whether it's warmer or colder.
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Thread Starter
Joined: Jun 2005
Posts: 2,265
Likes: 671
From: Oskaloosa, Iowa
I often find that the OEM values for the spark vs IAT table are really close to what you want. Don't use this table as an excuse to put more total timing into the engine when you can just do that in the base (High Octane) table anyway. You want a tune that automatically compensates for weather changes, whether it's warmer or colder.
It was my understanding that in OLSD it references the low octane table. Either way I copy and pasted my low octane table the way I had it set up into my high octane table.
I had initally filled up in the winter after I did the fuel pump and injectors install. I think I had bad gas because I couldn't put any timing in it. After a couple tanks recently I keep adding timing now and not getting any kr so I think I just had bad gas initially. I still have timing dropping down to 10 around 4800 to 5000 and ramping up to 14 at the shift point of 6500. I think I will raise it one more across the board and do a wot pull to test again. The way I had the iat timing adjustment it was pulling timing before 104 degrees so now I have it back to oem and I wasn't pulling any timing due to iat on the last log. I think I'm on the right track now to getting this thing making the power it should.
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