GC99TA

iTrader: (30)

My L92 Vic Jr. carb intake just showed up the other day and overall it looks like a nice piece. But I noticed that the injector bosses that are cast into the outside of the runner also protrude into the inside of the runner. I'm sure for cost reasons Edelbrock just casts the exact same intake for injected and carb applications and then machines out bosses to accept the injector on the injected models, and leaves it fully intact on the carb ones. But for a carb application, it seems like it would be an unnecessary flow restriction and needs to be ground out for optimal flow. Has anyone else done this?

3pedals

iTrader: (3)

I saw the same thing, I thought about it, but didnt do it, incase I go efi in future

GC99TA

iTrader: (30)

Yeah, I also may go efi in the future if I go turbo, but I think I'd just sell the carb intake and buy an EFI one. Not sure it'd be cost effective to try and have the injector holes machined into this intake. I think I'm gonna grind mine out.

burgers

iTrader: (77)

I took them out when I was doing port matching and clean up.

GC99TA

iTrader: (30)

Cool. What did you use to grind them out? I was thinking about using sanding rolls. Any tips to keep them from plugging up?

3pedals

iTrader: (3)

use a carbide cutter in a die grinder. dip it in ATF periodically, this will keep the aluminum from plugging up the cutter. Its messy, but it works.

ZONES89RS

iTrader: (25)

I would just use the carbide bits that are made for aluminum if you have any, then if you are picky enough, use the cartridge rolls to make them smoother.

GC99TA

iTrader: (30)

Cool tip...thanks! My buddy told me they had some special grease at his work for the same purpose, but I figured there was probably a more commonly available item (like ATF) that may work for the same purpose. I'll give that a try.

LOL....yeah...I'm definately picky enough....to a fault sometimes. Is there a good place to pick up aluminum specific carbide bits? Is this something Home Depot or Sears would commonly stock? I know I've seen carbide bits at both places but never noticed if they were specifically for aluminum. I have some that I picked up from Harbor freight and I'm not sure they'd grind butter.

ZONES89RS

iTrader: (25)

The fine bits are for iron, they get clogged by aluminum usually. The Aluminum carbides are larger teeth, actually take out material quicker as it can be good or bad, but i get them from the swap meets when i see the tool guy, he always has them(both).

GC99TA

iTrader: (30)

Cool. Thanks.

LS_10

iTrader: (1)

I ground mine out also. when i was smoothing matching and cleaning up the runners, not sure if it helped increase hp numbers but made me feel better lol

Irish350

iTrader: (14)

if i was gonna do it id knock them down on the outside too, and then try to match the grain or just paint it

NemeSS

iTrader: (127)

ive always just used plain ole wd40 instead of atf.

3pedals

iTrader: (3)

I think just about any lubricant will do the job. I even use the fine carbides, becasue thats what I had when I was porting aluminum, as long as you get the cutter lubed up frequently it wont clog up.

GC99TA

iTrader: (30)

Nah....those outside ones look like a good place to plum a DP N2O nozzle to me.

Cool. That gives me some options then. I'll try and update this once I've found the time to grind them out......way too many irons in the project fire right now!

GC99TA

iTrader: (30)

OK.....I know this thread is very last year....but I said I'd update it once I got mine done, so here we go.

Here is what I started with:



Well, that just won’t do, so I spent some quality time with the Dremel tool this weekend. I started with a carbide bit and stopped frequently to dip it in ATF as recommended earlier in this thread. It worked great! Not only did it keep the bit from plugging up, but it also lubricated it well enough to make it cut smoother. I also finished the ports off a little with a sanding roll, and then some paper by hand. I might not have done the best job on them, but I certainly didn’t make them flow any worse.






I’m not sure, but I think something is missing here……..Oh yeah…..a carb. Well, I ordered up a new 4150 from Patrick Prosystems on Monday. It should be here later this week!

NemeSS

iTrader: (127)

What is the part no. And usual cost of the l92 jr??

GC99TA

iTrader: (30)

Part number is 28457. Summit lists them for $349.95, but I found mine for $288.xx plus free shipping elsewhere online and had Summit price match it.

ZONES89RS

iTrader: (25)

Sweet, looks like you did a great job. Let us know how it does with the brand new carb.

GC99TA

iTrader: (30)

Thanks man. Will do.