Thread: LIM and M90 Supercharger port Mod

I'm going to be modifying and Porting my Lower Intake Manifold and M90 Supercharger.

This are the tools and parts I'm going to be using.

For Porting M90 Supercharger and the endcap of the LIM:

Dremel Model 200 - https://www.dremel.com/en-us/tools/P...pid=200+Series

For the LIM TB Coolant Passage Mod:

Here is a good write-up by BillBoost
http://www.grandprixforums.net/showthread.php?t=46931

IRWIN Adjustable Tap Handle & Reamer Wrench 12498
This is what worked best for me, but you can use whatever works best for you.
http://www.sears.com/irwin-hanson-ir...-SPM3222753201

IRWIN 1903 Taper Pipe Tap 1/4-18 NPT NEW 1903ZR Carbon Steel Thread Cutting
http://m.ebay.com/itm/111138306639?nav=WATCHING_ACTIVE

5 PCS 1/4"NPT Brass Internal Thread Socket Pipe Plug
http://m.ebay.com/itm/331330247205?nav=WATCHING_ACTIVE

Engine Coolant Water Bypass Gasket ACDelco GM Original Equipment 24505049
http://m.ebay.com/itm/121394743297?nav=WATCHING_ACTIVE

I don't think I'm missing anything, but if I am please let me know! I will also be posting pics of this project as I go.

Any suggestions are more then welcomed.

P.S. Don't buy anything from China on eBay unless you want to wait a month to get it........Lol!

Have you looked over the how to mod a lim thread? Sounds like that's what you are following.

Yes Bill I did that's when I decided to do this mod. By the way that's a great How-to thread.

I started this thread because as I'm doing these mods I want to post my progress with pics and I want to make Sure I'm doing everything correctly. You all can guide me, if I foul up.

I'm still a ROOKIE on the Gm 3800....lol

Any rookie should be able to follow any write up I've done w/o worries. Holler if you have any questions

Going to do this when I swap to my Geb V. I'm wondering if the H bar is worth the effort of machining it out?

Well, from my understanding it is good to do that when installing a intercooler system, but I'm not to sure.

Have a look at this thread http://www.grandprixforums.net/threa...-removal/page3 it might help answer your questions.

Wow, that thread was an interesting read! I don't think it helped with my decision but it was eye opening reading about their feud. I've never had a purchase go bad like that.

Lol....Yea that's what I thought also. That was a sour deal for that dude.

Are you going to put a intercooling system in your ride? I'm just curious!

Eventually yes. From what I read, the H beam removal only helps if you inter cool. I think I'll hold off until then. Thanks for the help!

I was wondering, if I need a ratcheting tap handle? Or will a regular ratchet work?

So, I decided it would be best to get these items as well.

I got this respirator so I don't inhale aluminium particles as I'm doing the grinding and porting. If anyone is doing this, it is important to have one of these because metal shavings are really harmful, when inhaled. The choice is yours.




I also purchased a 1/4" T-Handle Ratchet Tap Wrench, which I don't think it is necessary to get this job done, but I think it makes the job more professional.



Just my thoughts!

I have ratcheting tap handles. They are nice if you have a lot to do. Been hand tapping for 25 years but only had the ratcheting handles for 2.

Lol....this will be my first time hand tapping. So, I figured I would start off the right way.

I've always preferred a standard or non-ratcheting wrench. They give you more control. More "feedback" if you will. Way less chance of breakage on smaller taps. Also, more leverage on the big ones. JM2C
http://www.amazon.com/Vermont-Americ.../dp/B0002YUVTY

Background: Die maker.

****, now I know why reptile is so off.

He's been inhaling all that aluminum for years.

Originally Posted by blueguy

****, now I know why reptile is so off.

He's been inhaling all that aluminum for years.

Lol....I couldn't tell you, I don't know him...

Respirator? Bahhhh

Here's my setup

On tapping. I think the ratcheting is overkill. You need to tap a little, remove and test your plugs. You want the plug to not be quite flush, then add sealant/teflon to it and flush it up.

Originally Posted by BillBoost37

Respirator? Bahhhh

Here's my setup

Lol......what a interesting setup you have, BillBoost! Improvisation......