V-10 Killer

iTrader: (22)

I picked up a used aluminum intake manifold and the previous owner had drilled and tapped the hole for the MAP sensor. I want to fill it in and re-drill for a stock type map sensor but I don't know the original diameter of the stock MAP sensor hole. Anyone have a spare intake and a few minutes that could help me out? I'd really appreciate it

Mercier

iTrader: (15)

I have a 5.3 intake and would be happy to measure for you but it might be different. Why not work backwards from the sensor itself? It fits in the hole right? :-P. If you don't have a MAP sensor yet, go measure one at the parts store for free. Or if mine is similar to yours I can measure for you. I do also have a new LS2-style truck intake sitting. Not meaning to be a smart-***..I may be missing something?

V-10 Killer

iTrader: (22)

If you would I'd really appreciate it. The map sensor hole should be the same for all these ls style intakes I believe.
I just picked up a new 2 bar map sensor but it didn't come with a grommet and I can't get into the local chevy dealership for a few days to get one so I can't guestimate a good hole size for it. There's currently a brass 1/4 npt barb fitting threaded in the hole I'm having a hell of a time getting out. No luck yet with the torch and vice grips lol.
I might just have to cut it off flush and drill it to size. I'm kinda concerned that the drill bit will make a rough/ugly hole that the grommet won't seal against... Either way, I still need a starting point for a hole size.

Harry6674

My truck manifold map hole measured .412 which is bigger then the drill size for a 1/4npt tap. May have to use a 1/4 to 1/8 bushing and drill it.

redbird555

iTrader: (14)

I just drilled the one for my fast 102 and they instructed a 3/8 which is what I drilled and the stock ls1 style maf fits perfect in there the ls3/7 maf takes a 5/16 hole

V-10 Killer

iTrader: (22)

Great, thanks a ton everyone

Mercier

iTrader: (15)

Yep. Sorry for the delay; I just saw you replied. I measured about same as Harry. By the sensor, I think you could go a little smaller. See pic with rubber seal. Why do you need to thread it? Are you using something different or are car sensors different?
Pic:
http://1drv.ms/VW6MZF

V-10 Killer

iTrader: (22)

Sorry it's a little confusing. Right now as I bought it, it's already been drilled and tapped to 1/4 NPT. There is a 1/4 barb fitting installed in it now. I was looking at using just the stock push in with grommet type fitting and wanted to removed the barb fitting, but I'd need to make the hole smaller.

Mercier

iTrader: (15)

Got it. Thanks for clearing up the confusion. I was sorta interested because I screwed up the mounting clips on the MAP sensor getting it off to measure and thought if there were a screw-in version I could get that.

But no worries..I was a super glue ninja in a former life so all is good.