Tips for preventing engine destruction
I usually don't type in threads like this but I want to share an unusual situation regarding timing and boost. My combo is a fairly radical solid roller 408 with an F2 procharger on c16 fuel and water 2 air intercooled. I first started running the thing around 15-17 lbs of boost and 16* of timing. Getting it sorted out, I worked my way up to 21* of timing and that is where it ran the best numbers. Never tried any more than that. Later I started running about 25 lbs of boost and started timing back at 15*. It was a total turd and the plugs where showing no heat. So I started moving timing up 1 degree at a time and it kept picking up mph. It was lifting the heads pretty bad once I got to around 21* again, but that is where it was running the best numbers on the track. I ended up tearing the motor down after the pass in the video below, but it would not surprise me at all if it kept picking up with more timing. I could never get a decent amount of heat on the plug. I'm posting this because as others have said, and I agree, the best way to tune is by reading the plugs. I've just got a weird situation here where the cylinder heads wouldn't stay down before I was able to find a max power tune according to the plugs. Weird to me but whatever..........4-bolts around the cylinder suck.......but the ford guys seem to have it under control. If I remember right this vid was around 24-26 lbs of boost and 21* of timing. We put the go pro under the hood cause we couldn't figure out where the little droplet of water under the hood where coming from. The water would be almost completely evaporated by the time we got it back to the pit spot so we had no idea it was doing like this. My jaw hit the floor when we watched the vid back at the trailer. Video Link: https://www.youtube.com/watch?v=jsGJ-n8Z7RQ
I pushed mine to almost 27lbs this past weekend on E85 and 21* not a drop in the overflow or under the hood. Love the Holley for stuff like this. Anytime I take it over 90% throttle it Logs EVERY sensor in the system and stores the log wether I use it or not. Priceless if you ask me.
Thread Starter
Joined: Nov 2009
Posts: 1,621
Likes: 31
From: THORNTON, PA (NEAR PHILLY)
I have low fuel press, low oil press, low voltage, high coolant and high IAT's ignition cut-off's thanks to "soundengineer" setup through the Holley. May not save the motor but better than nothing. Closed-loop is set to add fuel only under boost. If you have a free output you can trigger rev limit #2 to activate for the above also.
I have low fuel press, low oil press, low voltage, high coolant and high IAT's ignition cut-off's thanks to "soundengineer" setup through the Holley. May not save the motor but better than nothing. Closed-loop is set to add fuel only under boost. If you have a free output you can trigger rev limit #2 to activate for the above also.
Few things I have done after blowing up 2 forged motors on 93 octane and 18 degrees timing.
-Run 8 range plugs.
-Hook up the coolant steam ports to all 4 corners of heads.
-Set up iat table to pull out all timing. How much and when really depends. With meth my car never gets over 80, so I have it pull 10 degrees over 85. Im probably spraying on the sensor so the reading just acts as a trigger to pull timing.
-Run methanol or e85. Pump gas is not good on most small t4 turbo street cars.
-Log and tune every run. If you dont know how to tune, learn. Im still learning myself but its really not all that bad especially wot tuning.
-Run 8 range plugs.
-Hook up the coolant steam ports to all 4 corners of heads.
-Set up iat table to pull out all timing. How much and when really depends. With meth my car never gets over 80, so I have it pull 10 degrees over 85. Im probably spraying on the sensor so the reading just acts as a trigger to pull timing.
-Run methanol or e85. Pump gas is not good on most small t4 turbo street cars.
-Log and tune every run. If you dont know how to tune, learn. Im still learning myself but its really not all that bad especially wot tuning.
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