Fuel Bad regulator diaphragm?
- Thread starter JD1964
- Start date
Been reading and thinking some more. I might try a re-torque of the head studs. I have yet to try that. Heres a direct quote from the Cometic website.
“If somebody calls me and has a leaky gasket, I tell them to try a retorque. If the block and heads have a good finish to start with, that will typically take it away.”
“If somebody calls me and has a leaky gasket, I tell them to try a retorque. If the block and heads have a good finish to start with, that will typically take it away.”
Ask The Experts - Head Gaskets - PerformanceRacing.com
Cometic Gasket supplies hi-performance gaskets for a variety of motorsports markets: ATV, Drag Race, Domestic Automotive, Harley-Davidson®, MX/Dirt, Off-Road, PWC, Road Race, Snowmobile, Sport Compact and Street.
www.cometic.com
Oh, wow. I failed to mention this because I thought it would be dumb to mention.
Additionally, I retorqued mine twice with a KB in the damned way. *fat sigh*
For giggles, here’s how the FMU with 12:1 disc affected the fuel pressure when I used Mighty Vac on pressure function to apply simulated boost.
View: https://youtu.be/1q-qUYyQgjs?feature=shared
View: https://youtu.be/1q-qUYyQgjs?feature=shared
Got some work done today cleaning up scrambled vacuum hoses and electrical wiring.
I got the driver side head re-torqued. I’ll do the other side tomorrow maybe.
I did one nut at a time. (ARP stud setup). In sequence, one at a time, marked the nut with paint pen. removed the nut, lubricated nut flange and stud threads with ARP moly, screwed but back down finger tight, torqued with Snap On click type to 85 ft lbs. Every nut ended up consistently 1/8 turn beyond where it was before I removed them.
I got the driver side head re-torqued. I’ll do the other side tomorrow maybe.
I did one nut at a time. (ARP stud setup). In sequence, one at a time, marked the nut with paint pen. removed the nut, lubricated nut flange and stud threads with ARP moly, screwed but back down finger tight, torqued with Snap On click type to 85 ft lbs. Every nut ended up consistently 1/8 turn beyond where it was before I removed them.
I’ve been pounding it some more over the past couple of days. It’s still holding.
I’m tinkering with AFR via Kirban regulator and FMU disc kit. We’ll see if I can get it decent enough. It’s a lean just entering boost (13.5) and pretty fat at 5psi (10). A bump in the static pressure seemed to make is a bit richer going in. I’m now going to fiddle with discs in the FMU to see if I can lean it out a bit at the top end.
I know a tune would be better and I have everything to DIY tune. I’m just not read to teach myself all that just yet. I’ll get to it eventually
I’m tinkering with AFR via Kirban regulator and FMU disc kit. We’ll see if I can get it decent enough. It’s a lean just entering boost (13.5) and pretty fat at 5psi (10). A bump in the static pressure seemed to make is a bit richer going in. I’m now going to fiddle with discs in the FMU to see if I can lean it out a bit at the top end.
I know a tune would be better and I have everything to DIY tune. I’m just not read to teach myself all that just yet. I’ll get to it eventually
I like the ones that have meanings that can be taken a number of ways. 
Is a pretty good one.
Is a pretty good one.
Its in the hands of the CT GodsI like the ones that have meanings that can be taken a number of ways.
Is a pretty good one.
I finally got the fuel dialed in with a 6:1 disc in the FMU. At the beginning of boost its 12.7 and gradually increases to 11.4 at 5psi. Thats the pulleys I'm running now. I’ll roll with this for a while. I’m happy with it.
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