I'm borrowing a DP carb (with option to buy) from a fellow racer. It didn't have the fuel inlet nuts or sintered filters in it (Holley calls them "screens"), so I took them out of my current 750 VS. In the process, I dropped one of the filters and it got dented on the leading edge.

I went to Checker, and they had Fram filters of the same size & type, visually. Doing the old gas-kissing blow-through test, though, they seemed more restrictive than the Holleys. Before I go out and embarrass myself with fuel starvation, are the Fram "filters" significantly more restrictive than the original Holley "screens"?

Before you say, "Just use an in-line and leave the inlet screens out", Holley very definately discourages that. I am using an in-line, but still found some stuff caught by the inlet screens.

Perhaps a trip to the ol' speed shop for some genuine Holleys is in order. That's hard to do when you're working 60 hour weeks and out of town a lot, though.

 

Well, I dont really know the answer to your questions, but do you ever sleep. Your working 60 hrs a week, and seem to be on here quite often and also have to take time to work on the cars. lol

Ben

 

Personally I prefer the nylon "screen" variety of filter over either other type. But they're not available in the right size for all Holleys. I just hate rectally abusing my steel fuel line to put one of those other kind in there.

The bronze-looking kind are somewhat restrictive; the paper kind, from a reputable mfr, are somewhat less so with fuel flowing through them, even though the blow-through test with compressed air might indicate otherwise. Even the Fram ones seem to work OK (even as much as their oil filters bite).

 

Sleep?

We had Friday off, so I was able to get a little done on it. Besides, I drop by here during lunch, at the hotel, and such. Actually spend more time on-line when I'm travelling, which I had done the last two work weeks.

Since I fab'd up the fuel line from tank to carb, I didn't feel bad about leaving a spot for an in-line. Put it right before the cool can. I took it out for some butt-dyno testing. The guy had it tuned really wierd, but I got it running half-way decent. Fuel starvation didn't seem to be an issue, though - at least through 2nd.

I'll see what it does on the track. Really hard to tell on the street -limited WOT room, gets hot (at least, hotter than it gets when I run it at the track), no quantative data, etc.

 

Finally got it out to the track. Guess they didn't hurt me too much (see this thread for reference https://www.thirdgen.org/techbb2/sho...26#post1412626 ).