Muddin_dude06
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Ridemywideglide said:This is the reason for running 020" washers.. You run 020 gasket, so you go from 040 to 020 washers to keep the injector the same distance from the bowl. 0 gasket + 040 washers = 40thou.. 020 gasket + 020 washers = 40thou... So by using the 020's Ken you kept your injectors at the stock location compared to the piston if you used a 020 gasket. What you did was effectively lose what you gained by running the 020's before the thicker gasket.
Initial point was about shaving the head and that changing compression or clearance. As muddin stated, with a good head guy doing the job, the only change will be injector depth, thus making a gasket selection based on "I shaved the head and now I need a thicker gasket" just plain WRONG.
Running the 020 gasket will lower compression, allowing, as muddin also stated, higher boost/nos with less chance of blowing it.
I have noticed that with the 020 gasket on mine, it is a bit more tempermental on cold starts. There is no more half-crank and fire like before. It's close when it's warmer.
Running 020 washers does just what Tony says (believe Smokem on whatever he says, even if he says the sky is green.. lol), puts the spray deeper into the bowl allowing more timing.
I'm wondering if anyone has ever machined the injector holes say 020 or 040 to get even deeper...?
Everything said above is perfect EXCEPT that if you shave the head .020" and use a .020" thinner washer it puts the injector in the same place. Technically it would be just a hair higher because the injector bore is at an angle. But it wouldn't be enough to matter IMO anyway lol. I just felt like being technical.
And yeah I would not use that Cometic gasket either, there have been a lot of failures. Just get a Cummins marine HG they can usually have them in time. "Ratsun" did a complete engine overhaul which included getting both the head and block true, and ARP studs to run the Cometic and his blew out in a really short time.