Quote from: Colorado-SHOBro on September 01, 2017, 07:19:09 PM
Quote from: StealBlueSho on September 01, 2017, 06:51:25 PM
I wouldn't chance it... honestly... if it's hot enough the meth could ignite if being misted out of the wastegate... clear balls of fire...
Now the other question comes to mind... why do both? The WG mod was to address fuel pressure issues which methanol resolves as well. I have datalogs with 22.5psi boost spikes with meth and perfect rail pressure... with WOT..
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Good call on the meth reaching a flash point.
I knew someone would ask that question and to be honest i don't have a clear cut answer for why i want to keep the wastegate. I know the meth would address the fueling issue. I guess in my head it just makes too much sense to regulate boost close to what you're commanding.
SBS i know your timing is very high but doesn't spark drop when you get load spikes still?
also, does your WGDC climb higher than normal during your boost spike? Or do they actually drop since the TIP DSD is being exceeded already.
The correlation between load spikes and spark drop is due to shifting. Ford uses built into logic to reduce spark at shift to ease the load on the transmission. It's not only expected but helps with the shifts... additionally you don't want to have a big boost spike with high timing.. that causes knock in a bad way since your fuel system is already taxed at that point...
During my boost spike my WGDC drops. My WGDC climbs a bit as the RPMs rise but that is also expected. When the RPMs rise so does the transfer of air into and out of the engine, to maintain the demanded amount of boost you need divert more exhaust through the turbines of the turbo to produce more pressure... thus the WGDC climbs to achieve this. At least, in a simplistic way. When the shift happens at the peak of the RPMs you get a boost spike as all the excess boost is pushed into the system during the gear shift since it's not vented. The WGDC drops as this point to adjust for the excess boost but then climbs again as your RPMs increase after the shift...
The WG mod complicates this because once the WG spring compresses and opens the WG you are creating a boost leak to bleed off that excess as opposed to it being digested by the engine... so the turbos need to work harder temporarily to keep the demanded boost... which in turn pushes more hot air into the system...
Hope that makes sense?
I am sure Brad can give a much more technical explanation...
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