Supercharger questions.

[grandprixgtp_91]

Ok im looking to finally buy the rest of the stuff to do my supercharger installation, and i had some questions, i want to buy an intercooler for it but i can only find turbo intercoolers(at a resonable price) will a turbo intercooler work? here is an example of one i am looking at.

http://cgi.ebay.com/ebaymotors/ws/eBayISAPI.dll?ViewItem&item=8039706063&ssPageName=MERC_VI_ReBay_Pr4_PcY_BIN_Stores_IT

, please let me know if that will work, i want to run anywhere from 8 to 14 psi of boost. from an eaton m90. also i know im going to need a 2 bar map sensor, where do i get that at and what kind do i get? also what size fuel injectors should i run? thanks for any help you can give me, the setup in putting this on is my 1991 Grand Prix GTP, 3.4L DOHC (97 motor with 91 intake setup on it ,and 91 electrical) , i am using an eaton m90 off of a 93 ford thunderbird sc, it is brand new and never used.

thanks

Jake

[RedZMonte]

Search for DAVEz34's post about his S/C install. ZZPerformance has Coolers for M90 S/C's on the GTP's probibly differenet then the T-Bird charger. Also you will need bigger injectors and hontestly if you swap to a 1996-97 harness and computer you will be able to tune it via powertuner. You will not need a 2 bar map sensor if you do the OBDII setup. But FYI a stock 1989-90 Turbo Grand prix is a 2-bar MAP. If your running 10+ PSI i would run a 3bar map (Grand National i think is a 3 bar). Dave has built a S/C adapter for the 1996 DOHC. Not quite finished with his setup but VERY soon. HONESTLY go turbo, much easier and you will not need to hack the hood. My Monte Z34 and TIMG's monte are both turboed. I made 264hp on 5psi. tim is a bit farther then i am with his setup but he is running 325hp/350tq on 10psi. Also there is a Fiero making just shy of 400HP (look in the DOHC performance section) again the best setup will be a OBDII swap, 42# injectors (Lucas makes them for the newer GTP's) and turbo.

S

[RedZMonte]

I gained 91HP and ~95TQ on 5psi over my baseline w/ Just intake and borla exhaust and UD Pulley.

http://60degreev6.com/showthread.php?t=33495&page=2

[StEvEzAsYcHo]

Damn you man! Every time i see your Monte, ITS WHAT I WANT!!! lol

As far as the blower goes, yes Turbo is a much easier route, but I would think a SC would be cool too.. Yes, you do have to cut the hood, but I think a supercharged DOHC is wicked sweet.. Good luck with it man, but as said before, I would prolly go to OBD2 if I were you.. I am doing that myself.. I have a 96 LQ1 I am turboing, along with a 96 Monte Carlo parts car I have full access to.. Have fun with the swap!

[grandprixgtp_91]

well the s/c im using is not going to bolt on top of the engine, it has a top plate to run the piping to the tb and im gonna set the s/c in place of the battery, and im gonna run a pulley off the water pump, over a bit to a shaft that will run along the front of the engine to the s/c. so i dont think il will have to cut my hood.

also, how hard is it to do an obd2 swap? and can i keep my instument cluster? has anybody done it? and will that turbo intercooler work? ill run it from the s/c to the intercooler, back to the tb, just like a turbo setup

thanks

Jake

[IsaacHayes]

If you can pipe the outlet of the S/C to the TB, then you can pipe it to an intercooler first. Turbos are more efficent, but S/C I think sound cooler!!

[RedZMonte]

Yes a Front mount Air-to-Air cooler will work. Just plumb it like i did with my turbo. I also would make sure you have enought room for the blower to sit where the battery is. AND make sure you align the blower pully with the rest of the pullies or the belt will fling off in a heart beat! As for OBDII it is not too bad of a job. You will keep your stock inst. cluster, you just swap the wiring harness and computer over. You will need to add a couple of sensors due to the OBDII monitoring more then OBDI. For the time being i say get the blower mounted and working then swap to OBDII. you can use a FMU (SSautochrome.com sells them cheap) for now but would only run it untill you get the OBDII in. That is what i am using with my turbo setup. It basically increases the fuel pressure with the boost and forces more fuel threw the injectors. I have a 12:1 FMU (12PSI increase in fuel pressure to every 1PSI of boost pressure). VORTEC sells it as part of their blower kits.

S

[IsaacHayes]

You're goign tohave to secure the blower to the motor you know. Unless you weld all your motor mounts and then you could attach it to the body.

[grandprixgtp_91]

well i have an ffp dogbone and the engine doesnt move at all with that in there so i think ill be ok.when you say new harness do you mean the one under the dash also? thanks

Jake

[grandprixgtp_91]

oh just out of curiosity can an eaton m90 be mounted upside down, i dont see why it couldnt be, and i heard that you could do it with these superchargers, becuase if i mount it upside down everything will fit alot better and save a huge headache. thanks

Jake

[RedZMonte]

I don't think it will be a problem monting it on its side but i dunno about up side down. they are internaly lubricated and if you flip it up side down it may not lube itself and burn up the bearings.... NOT SURE! never thought about it..

As for wiring you can just swap the engine harness. you don't need to do the harness under the dash. you will need to add the wireing and OBDII port under the dash tho. Had to do that in my lumina w/ the L67 Swap.

S

[grandprixgtp_91]

ok that sounds easy enough, if its just the engine harness and the computer than im gonna go for it. as for the supercharger i could probably just overfill the resivoir and it should get proper lubrication. its just that it will fit alot better upside down. anyways what do i need for the obd2 swap? engine harness, computer, anything else, will the engine harness plug right into the wiring block in the firewall? is there a walkthrough or a post on anybody thats done it so i have something to follow? thanks

Jake