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Looks like the CIS has got to go.....ugh
While I have owned pcars since college, I have only been a member of the CIS fraternity for just under 2 years. It had been an educational experience! A close friend owns a shop and is a CIS guru. With his help, I am getting pretty familiar with it too.
After a full day of fuel system testing, tuning adjusting the WUR's enrichment pressure to as low as it would go, and some road tests (I'll skip the details since you guys have probably done all of this too), we confirmed that the CIS just cannot deliver the fuel needed by the current build. Even with the boost turned down to 0.7 bar, the AFR rockets past 13 at only 4800 rpm. Detonation happens next.
Not being one to spend money on making LESS power, we are starting to gather everything we need to go to a modern EFI system. With the supply chain issues these days, it is going to take a while to get everything but, if there is any interest, I will update the thread as we get started.
At least it runs well below 4500 rpm so will be out and about in it until it is time to pull the engine. Hoping to finish it by mid-summer of this year.
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