SD manifold or drill and tap?? [Archive] - Diesel Place : Chevrolet and GMC Diesel Truck Forums

: SD manifold or drill and tap??


GMC2500HD
11-06-2006, 06:59 PM
Should I install an SD manifold or drill and tap for the Boost gauge? :confused:

If you have drilled on an LBZ can you post a pic of your inlet? Just curious if I do that where the best place is...:o:

Thanks

Minn-Kota
11-06-2006, 08:04 PM
Hey mod....use the search!!

;)

ta-daaa!!

http://www.dieselplace.com/forum/showthread.php?t=91927

PEANUTGRWR
11-06-2006, 08:13 PM
if youre nto going to go balls to the wall and shoot nos and meth i would just drill and tap, youre gonna have to do that on your dual pyros anyway

GMC2500HD
11-06-2006, 10:36 PM
Ok well I do not recall seeing that but oh well.. So, as far as the manifold, other than what Pnut said, anyone else have any input? LOL

ecc_33
11-07-2006, 12:20 AM
im with nut...it took me about 2 minutes to put my SD manifold on...and is one fine product...but for the cash if your just gonna get a boost gauge....well i would just tap it:)

femritet
11-08-2006, 01:40 AM
I have a picture of my drill and tap on my LLY. I don't know if there is much difference. Let me know

demarcjp
11-08-2006, 08:21 AM
I would be interested to see if the drill and tap may lead to stress cracks in the OE manifold? I plan on replacing the OE manifold with a BD for two reasons:
first, I fear the cold weather causing high thermo-cycling may lead to a crack if I drill and tap.
second.... have you seen the restriction in the OE manifold!!
besides, IMO you have to remove a manifold either way, no matter what process is used, you would have a very difficult time convincing me that no cast iron will wind up sneaking into the turbo drilling and tapping on the vehicle.
just my 2 cents...
but hey, what do I know

Rttoys
11-08-2006, 08:28 AM
GMC2500HD, I'm trying to make the same decision. It's a coin toss for me.

GMC2500HD
11-08-2006, 08:49 AM
Well I am considering getting the SD manifold just so that I don't have to drill it and also getting the BD manifold so that I can run the drivers side and have less restriction even though it is minimal at best from all the diagrams I have seen. So I can understand Russell, can't really make up my mind..