What OEM superchargers are best to fit on a GS?
#16
Lexus Test Driver
iTrader: (11)
![Default](https://www.clublexus.com/forums/images/icons/icon1.gif)
I'm picking up a used (14k mi.) Eaton M90 off a Grand Prix tomorrow morning. I'll need to hunt down a 2.8 or 2.9" pulley pretty soon, too...
I'm starting to sketch plans now, but it'll probably be the beginning of July before I go full force into it due to other things going on. Any suggestions are most definitely welcome.
I'll probably start a new thread once the project is up and going. Wish me luck in not blowing up my damn engine.![Smilie](https://www.clublexus.com/forums/images/smilies/smile.gif)
I'm starting to sketch plans now, but it'll probably be the beginning of July before I go full force into it due to other things going on. Any suggestions are most definitely welcome.
I'll probably start a new thread once the project is up and going. Wish me luck in not blowing up my damn engine.
![Smilie](https://www.clublexus.com/forums/images/smilies/smile.gif)
The biggest and hardest thing would be making a box to mount the supercharger on the intake manifold. Or Could we simply take the top part of the intake manifold off then create an aluminum plate (1/4") thick to bolt ontop of the bottom of the intake manifold then cut a hole and place mounting bolts on that plate for the supercharger??
If that's the case then this might be easier than i thought!
http://www.speedymetals.com/pc-2408-...num-plate.aspx
Heres a link to show how cheap an aluminum sheet would be... Prob only need 1 sheet of 12x24".
Also, Do you have any ideas on how to mount the throttle body onto the supercharger?
Why would we need colder plugs? And a boost gauge if the ECU will compensate? Sorry im not the best with cars. Hehe i've only been driving for two years but im trying to learn as much as i can!
Gasket material
http://www.amazon.com/Mr-Gasket-77B-.../dp/B000BWE3VO
Boost gauge
http://prosportgauges.com/60mm_perfo...es_gauges.aspx
Wideband Gauge
http://prosportgauges.com/wideband-a...kit-Amber.aspx
1/4" Aluminum stock
http://www.speedymetals.com/pc-2408-...num-plate.aspx
2.8" Pulley
http://www.pulleyboys.com/store/cata...lley-p-35.html
This is the list so far...
Last edited by TLcoats; 06-01-10 at 09:15 PM.
#17
Lexus Test Driver
iTrader: (8)
![Default](https://www.clublexus.com/forums/images/icons/icon1.gif)
so what math was done to get 6lbs of boost with a 2.8" pulley on an M90? I know that on a GTP its running a 3.8 from factory running ~5-6lbs... a 2.8 on a Grand Prix will close to max it at 15+psi with a willingly modded engine of course. I know a lot of variables come in hand when it comes to how boost is calculated (intake volume etc), but man a full inch drop to get the same 6lbs as a 3.8 from factory sounds nuts
BTW, I'm an M90 master
(on the GM 3.8 that is, used to be part of my drag car before swapping it out for a Novi) too bad you didnt want one while back.. had a Gen 5 M90 brand new that was ported and polished and powder coated black up for grabs that I literally gave away ![Crying](https://www.clublexus.com/forums/images/smilies/Peace.gif)
![Smilie](https://www.clublexus.com/forums/images/smilies/smile.gif)
![Big Grin](https://www.clublexus.com/forums/images/smilies/biggrin.gif)
![Crying](https://www.clublexus.com/forums/images/smilies/Peace.gif)
![](http://c4.ac-images.myspacecdn.com/images01/28/l_b5b8c3e1c650c9a2add8fc9a97653c8f.jpg)
#18
Lexus Test Driver
iTrader: (8)
![Default](https://www.clublexus.com/forums/images/icons/icon1.gif)
oh and, if you're gonna do a used one, dont fret, all you gotta do is get a rebuild kit for it will cost only as much as you want to put in to it. Just need new bearings for the rotors, hopefully you get one with clean rotors ![Smilie](https://www.clublexus.com/forums/images/smilies/smile.gif)
dont know about anywhere else, but this is where I went for most of my parts for the Drag.
http://www.zzperformance.com/grand_p...ts1.php?id=157
![Smilie](https://www.clublexus.com/forums/images/smilies/smile.gif)
dont know about anywhere else, but this is where I went for most of my parts for the Drag.
http://www.zzperformance.com/grand_p...ts1.php?id=157
#19
Lexus Champion
iTrader: (10)
![Default](https://www.clublexus.com/forums/images/icons/icon1.gif)
I look forward to starting this project too. Im just brainstorming how were guna do this.
The biggest and hardest thing would be making a box to mount the supercharger on the intake manifold. Or Could we simply take the top part of the intake manifold off then create an aluminum plate (1/4") thick to bolt ontop of the bottom of the intake manifold then cut a hole and place mounting bolts on that plate for the supercharger??
If that's the case then this might be easier than i thought!
http://www.speedymetals.com/pc-2408-...num-plate.aspx
Heres a link to show how cheap an aluminum sheet would be... Prob only need 1 sheet of 12x24".
The biggest and hardest thing would be making a box to mount the supercharger on the intake manifold. Or Could we simply take the top part of the intake manifold off then create an aluminum plate (1/4") thick to bolt ontop of the bottom of the intake manifold then cut a hole and place mounting bolts on that plate for the supercharger??
If that's the case then this might be easier than i thought!
http://www.speedymetals.com/pc-2408-...num-plate.aspx
Heres a link to show how cheap an aluminum sheet would be... Prob only need 1 sheet of 12x24".
I don't know the exact process you will take but you still need to cutout the plate to bolt the m90. So, you will probably want to precut for the m90 and then weld the plate to the halfed intake. ...or draw out the outline and cut the plate then weld later.
or, two/three plates of aluminum, sandwiched (like Mr. Jokster's pic above)...where the middle has cavity for air to move to all cylinder. You can still utilize the oem intake manifold, but in this instance, you would cut as much as you can so you can still bolt it up to the block. It's just that you'll use the three plates to make bolt up easier with clearance to boot.
I hope it happens!
Last edited by sam430; 06-02-10 at 01:52 AM.
#20
Lexus Test Driver
iTrader: (11)
![Default](https://www.clublexus.com/forums/images/icons/icon1.gif)
Frank said a 2.8" pulley would make 6.3 psi?
I planned on making a small litlle box out of alumnum. First the bottom plate witht the wholes leading into the intake manifold into the engine. Then about 1" high side to create a 'box' then put the top plate onto of that with a cutout for the supercharger and holes for bolts and such.
Anybody have any other ideas?
I planned on making a small litlle box out of alumnum. First the bottom plate witht the wholes leading into the intake manifold into the engine. Then about 1" high side to create a 'box' then put the top plate onto of that with a cutout for the supercharger and holes for bolts and such.
Anybody have any other ideas?
#21
![Default](https://www.clublexus.com/forums/images/icons/icon1.gif)
TLCoats: Good work, man! I'd love to be able to stick the M90 on the top of the bottom intake manifold and call it a day, but I think hood clearance will be an issue. I'll size it up and post a pic in a couple hours... For TB location, I've been thinking along these lines: https://www.clublexus.com/forums/441482-post9.html Colder plugs help with detonation (the temps in the cylinder stay lower so combustion happens when it should vs. sooner).
Mr Jokster: Hey, man! I didn't know you used an M90 on your drag car! I got the pulley size from this site: http://www.planetsoarer.com/boost/boost.htm And Scotturknot (sp?), who SC'd his SC400 said a 2.8 or 2.9 sounded about right when I PMd him. I also heard the 3.X" pulley brought like 7psi on the Grand Prix, so I'll keep checking to make sure the info stays consistent. How does the relief valve/butterfly valve underneath work?
Sam430: I agree, if it can't be stuck on top of the bottom manifold, I'll have to have the bottom manifold milled down and a short "sandwich" put on top to make sure the air's evenly disbursed before it gets into the bottom manifold.
Mr Jokster: Hey, man! I didn't know you used an M90 on your drag car! I got the pulley size from this site: http://www.planetsoarer.com/boost/boost.htm And Scotturknot (sp?), who SC'd his SC400 said a 2.8 or 2.9 sounded about right when I PMd him. I also heard the 3.X" pulley brought like 7psi on the Grand Prix, so I'll keep checking to make sure the info stays consistent. How does the relief valve/butterfly valve underneath work?
Sam430: I agree, if it can't be stuck on top of the bottom manifold, I'll have to have the bottom manifold milled down and a short "sandwich" put on top to make sure the air's evenly disbursed before it gets into the bottom manifold.
#22
Lexus Test Driver
iTrader: (8)
![Default](https://www.clublexus.com/forums/images/icons/icon1.gif)
Mr Jokster: Hey, man! I didn't know you used an M90 on your drag car! I got the pulley size from this site: http://www.planetsoarer.com/boost/boost.htm And Scotturknot (sp?), who SC'd his SC400 said a 2.8 or 2.9 sounded about right when I PMd him. I also heard the 3.X" pulley brought like 7psi on the Grand Prix, so I'll keep checking to make sure the info stays consistent. How does the relief valve/butterfly valve underneath work?
![Stick Out Tongue](https://www.clublexus.com/forums/images/smilies/tongue.gif)
![Smilie](https://www.clublexus.com/forums/images/smilies/smile.gif)
![EEK!](https://www.clublexus.com/forums/images/smilies/eek1.gif)
it just hit me
![Smilie](https://www.clublexus.com/forums/images/smilies/smile.gif)
![Roll Eyes (Sarcastic)](https://www.clublexus.com/forums/images/smilies/rolleyes.gif)
![Smilie](https://www.clublexus.com/forums/images/smilies/smile.gif)
Might get lucky on some bids
![Smilie](https://www.clublexus.com/forums/images/smilies/smile.gif)
http://cgi.ebay.com/ebaymotors/M112-...item27b224a24c
http://cgi.ebay.com/ebaymotors/98-03...item255afbee30
Last edited by Mr Jokster; 06-02-10 at 12:43 PM.
#24
![Default](https://www.clublexus.com/forums/images/icons/icon1.gif)
I would take the upper intake manifold off, but I got other projects I gotta wrap up before I dive into this or I'll turn into one of those guys with a garage full of half-projects. I'd guess around June 8th I'll be able to start playing. I'm very interested to know whether the hood will clear or not. If it doesn't...by like an inch or so...you know what? I once accidentally dented a guys truck with a rogue baseball. I think once that hoodliner's out, and a hood brace or two is cut, I need to find me a baseball. ![Smilie](https://www.clublexus.com/forums/images/smilies/smile.gif)
Mr Jokster: So the bypass valve will go through my adapter into the intake -- that's what I was thinking, but thank you for the confirmation. Like I say, I'm new at this. The vacuum-driven butterfly valve I'm not sure how to control yet -- there's like 3 vac lines going to/around just that. Plus the vac lines for the OEM intake...that'll take some figuring out to plan what goes where in the new setup. Anyone have a detailed diagram naming functions in the M90 from a Grand Prix GTP?
K&N FIPK will be for sale in the next couple weeks...
![Smilie](https://www.clublexus.com/forums/images/smilies/smile.gif)
Mr Jokster: So the bypass valve will go through my adapter into the intake -- that's what I was thinking, but thank you for the confirmation. Like I say, I'm new at this. The vacuum-driven butterfly valve I'm not sure how to control yet -- there's like 3 vac lines going to/around just that. Plus the vac lines for the OEM intake...that'll take some figuring out to plan what goes where in the new setup. Anyone have a detailed diagram naming functions in the M90 from a Grand Prix GTP?
K&N FIPK will be for sale in the next couple weeks...
#27
Lexus Test Driver
iTrader: (8)
![Default](https://www.clublexus.com/forums/images/icons/icon1.gif)
Oh if you dont know already... Anything smaller than 2.8" pulley you will have to machine the snout down, I think 2.8 fits not sure. Let me know if you need info on that, I know a place near you to 'rent' the tool to do it yourself and save a buck
oh and I recommend getting a modular pulley on there cause pressons are a biatch to work with
![Wink](https://www.clublexus.com/forums/images/smilies/wink.gif)
![Sad](https://www.clublexus.com/forums/images/smilies/sad.gif)
#28
Lexus Test Driver
iTrader: (11)
![Default](https://www.clublexus.com/forums/images/icons/icon1.gif)
Good work man! I tried taking off the top intake manifold today to mock up some cutouts to be put onto aluminum but couldnt figure it out. As i was looking around the engine i saw that the water pump would be in the way of the serpentine belt and supercharger snout!? Also the throttle body is rather wide, so wide that it would be pretty difficult to find a spot for it? Also the wires coming off the throttle body what would we do with those? Sorry for all the questions im just excited to start this!
![Big Grin](https://www.clublexus.com/forums/images/smilies/biggrin.gif)