M90 porting need your opinion guys!

BlownGTP · Dec 9, 2006

** UPDATE(12.13.2006)**I am now taking apart the M90 to send for porting need advice

Deciding who to go with to port my M90 housing...

*Pricing is not exact and may vary. This is more or less an estimate guys.

ZZPerformance - Ported M90 Supercharger - $200.00

+ $200 (refundable core charge)
+ $200 (Inlet Outlet work and EGR hole fill)

total: approx. $600 + S&H

http://zzperformance.com/grand_prix/products1.php?id=162

INTENSE™ Ported Gen 3 M90 Supercharger Housing - $200.00

+ $175.00 (refundable core charge)
+ $250.00 (inlet/outlet ported supercharger housing option)

total: approx. $600 + S&H

http://intense-racing.com

W Body Store Ported Supercharger Housings [WBS-VSx] - $200

+ $75.00 (core charge)
+ $130.00 (ported/polished inlet and modified outlet)

total: approx. $400 + S&H

http://www.wbodystore.com/grandprix/ported-supercharger-housings-p-23.html

So, I would really like all of your opinions good/bad and if you actually have any experience with this why did you choose the way you did. Thanx in advance everyone!! :biggthump

scotts99gtp · Dec 9, 2006

Save up a little extra and buy a Gen V from Ed Morad! They usually go for $700-900 depending on his supply and the demand of customers.

BlownGTP · Dec 9, 2006

This is really the last mod I should be doing to the GP. So, I'm not really interested in the Gen V, but that really isn't a bad deal.

I am looking for a lx coupe mustang to start modding because it's somewhat simpler to deal with and I've been planning a HUGE project for a while now. I found a great deal from a friends dealership that I am looking into. Thanx for the info though bro. <--- Didn't mean for it to rhyme like it did lol

97GrandPrixGTP · Dec 9, 2006

i bought w-body store ported supercharger. i did noticed a little difference in power but nothing to much. but that could also be that im already maxing out my gen 3 m90 cuz i got a sub 2.6. the main reason i got mine ported was for my new throttle body that i got

BlownGTP · Dec 9, 2006

I have a '97 GP too bro and I just remembered INTENSE won't work on that year M90 because the vacuum hoses have to b re-routed or something of that nature. Looks like I only have 2 options now. I was leaning more towards INTENSE though because out of everyone they have the best customer service availabe so far. Well, I'm def. going to look more into the w-body store's offer.

Thanx for the info guys and keep em coming! :biggthump :new_rainf

97GrandPrixGTP · Dec 9, 2006

i had to modify my blower housing when i got it from w-body. the vacuum tree hole wasnt on the new 1. and since i have access to alot of machines i jsut drilled it out and it works perfectly

BlownGTP · Dec 9, 2006

Would you by any chance have a pic or example of the vacum tree hole that you're talking about?

DJZ1 · Dec 9, 2006

What else do you have done to the car as of right now? I had an Intense ported one and never had any problems with it. I also second what Scott said and go with the Gen V. Their is alot of info on the Gen V floating around somewhere on here, I belive someone did a back to back dyno test (before and after a Gen V swap) and they gained around 20 whp.

rasp · Dec 9, 2006

I have a ZZP Stage IV ported blower and though it's a good system and the port job was excellent, if I did it all over again, I would have gotten the Gen V.

BlownGTP · Dec 10, 2006

Isn't there a lot of other things that would need to be done if you are swapping out blowers to a Gen V? Or is it simply just swap the blower and you're good 2 go?

GTPHiggz · Dec 10, 2006

For the most part it's just swapping the blower and you're good to go if you have everything you need. You will need a different LIM to match the Gen V, and you will need a throttle body adapter. Those are the main components you will need. There's a ton of information on Gen V swaps here, mine took me about 3 or 4 hours to do and it was well worth it. You cannot beat the sound of a Gen V. Just do a search and you'll find everything you'll need to know.

BlownGTP · Dec 10, 2006

Appreciate the info guys. It really does sound like a good idea to just go with the Gen V but like I said that's not what I'm interested in. So far I'm leaning towards W-body stores ported M90 blowers. Any other recommendations are highly welcomed though. :icon_razz

scotts99gtp · Dec 10, 2006

A stock Gen V is better than the best ported Gen III........ Then you have the option of getting the Gen V ported as well. Its not that much more $$$$ but alot more power, and one hell of a sick sound!:icon_eek: If you say it is the last mod for the GTP, make it well worth it, right?
All you need is a Gen V blower, L32 lower intake manifold (or you can modify a Gen III LIM), make sure you have the correct bolts (3 of them are different than Gen III bolts), whatever throttle body adaptor you need, a lower intake gasket, blower gasket and throttle body gasket.

lexinator02 · Dec 10, 2006

i just put on a zzp stage IV s/c and a ported LIM. I figured id put that on since im getting a i/c after winter. Well I actually lost a pound of boost but the sound is awesome. I think the LIM being opened up caused me to drop some psi. Im waiting to put on my Northstar tb. I know it will be alot better then. If I could do it all over again id just get a gen V. Ill prolly end up doing that in the spring but im gettin it ported b4 it goes on.

Ultimate Weapon · Dec 11, 2006

Rasp you ever been to Ohio Valley drag strip in Kentucky? I swear I've met you if you have.

BlownGTP · Dec 13, 2006

Not sure if I should make another thread about this but...

I am currently taking apart my M90 supercharger to send in for porting. Are there any precautions I should know about before doing this and if you guys know of a manual that would assist me in any way during this process? Thanx.

Trannyman95 · Dec 14, 2006

Though old as dirt to the 3800 community this link should help you out on dissassembly if you are still looking for info....
http://www.thrashercharged.com/tech_htm/blower_tear.shtm
It has been on Thrashercharged.com for years and hope it helps

BlownGTP · Dec 14, 2006

That's the info I needed. Thank you very much! :biggthump
If I'm ever in Indiana we'll have a few :coolbeer: on me bro!

M90 porting need your opinion guys!

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