yellow87irocz

i have checked all of the other message boards

ie cz28.com and others and no one can answer my question

HOW DO I SUPERCHARGE MY 87 Z28 WITH A HOTCAM LT1 IN IT?

I KNOW I WANT A ATI D-1 BUT I HAVE NO IDEA HOW TO DO IT?

I have to wait til monday to talk to ATI but i need some ideas

and i know that i have seen posts about it being done i just cant

find them

posbird87

buy a supercharger system for an lt1, bolt it on and work from there

CrazyHawaiian

I'm not positive, but I think the LT1 and LS1 superchargers mount differently than the Gen 1 block superchargers. The LT1 and LS1 units mount low where the steering box is in a 3rd gen. The Gen 1 S/C units mount high, almost parallel with the water neck. I dont think a LT1 system would bolt onto a LT1 motor in a 3rd gen because of the differences in the engine bay. It would not fit because of clearance issues in the 3rd gen engine bay. Not to say it cant happen, but I just dont think it would work out with the provided LT1 mounting plate. If I were you I would look into adapting the LT1 S/C unit to mount high on your LT1 like the Gen 1 block S/C units do. You would probably need a custom made mounting bracket and possibly some fabrication to get the belts working properly. You'll definately need to fabricate the piping. The blower units themselves are not different for different years of the F-Body (aka the 3rd gen Vortech S-Trim unit is the same as a 4th gen Vortech S-Trim unit). The differences are in the mounting brackets, the pulleys, and the piping. It is possible to make it work, but it will require alot of planning.

These are the kind of problems you'll run into when swapping newer generation motors into an older car.

CrazyHawaiian

Here's an easier way to show you what I mean. I know you said you wanted an ATI unit, but I couldnt find any pictures of the ATI setups, so I used Vortech as an example. If ATI mounts their LT1 units differently, then I apologize.

Here is a Gen 1 block (L98) S/C setup:


Here is a LT1 S/C setup:


You can see how one mounts high and one mounts low. The questions is if the low mounting setup can clear a 3rd gen Engine bay. I dont know the answer for sure since I've never tried to do it myself, but from the looks of it I dont think it will fit.

83 Crossfire TA

iTrader: (2)

that setup will hit the steering box.

years ago I did this and found that with 'vette style accessories the old ATI Vette kit (put the blower on the upper passenger side) is almost a bolt in.

yellow87irocz

thanks guys i will have to do some more research to figure this out

i asked because i know that i saw somewhere that someone has done it

Z28ricer

iTrader: (2)

You either use this powerdyne kit and stay with low boost



Or you buy the vortech generic SBC kit and then have a crank pulley fabricated, it mounts it in the same spot and will bolt to the motor fine, just its a vortech instead of the dyne and you'll need a crank pulley fabbed.

yellow87irocz

i was looking around and i have come up with this

how about a third gen bracket and belt set but hook it to a LT1 head unit also using the LT1 hub assembly and then using a third gen twin highflow intercooler system

or i can try to use a carb style bracket system and the third gen head unit and twin highflow intercooler and no FMU just make my fuel system
let me know what you think

83 Crossfire TA

iTrader: (2)

How about just getting the 'vette bracket like I already said, or just cutting out one that puts it where every you want it?

Z28ricer

iTrader: (2)

The vortech carb'd kit is what he needs, its cheaper than trying to get a hold of the vette setup, it wont require him changing his front drive accessories completely, and the only fabrication will be the proper crank pulley, along with intercooler setup if he wanted it,

and yellow, i have no idea where you come up with this "3rd gen" LT1" and "carb'd" head unit thing.... they dont make specific compressors for each car, usually just different clocking of the housings...

and crossfire that vette bracket also requires a reverse rotation compressor for the vortech setup.

biggtime

There is a specific p600b. I have a LT-1 one and had to mount it upside down on my thid gen bracket because how it oils.

83 Crossfire TA

iTrader: (2)

F-body LT1 accessories will not fit in a 3rd gen (everything but the alternator is mounted low and wide on the engine, where the 3rd gen has a K-member and steering), so I could only imagine that he's either got a 'vette LT1 with the corrisponding accessories, or that he's not running all of them or done something custom. Considering the question, I doubt he's gone custom, so the 'vette accessories are the most likely what's there if it's in the chassis. I could be wrong (I did this A LONG time ago), but I believe that the ATI C4/LT1 vette setup uses a standard rotation compressor but mounts it backwards (pulley facing engine), and I remember the only real problem it caused (it was in an '83 camaro) was the radiator fan had to be moved.

Z28ricer

iTrader: (2)

F body accessories fit just fine, if running a/c the K member needs to be dented or notched a bit, other than that, many people are running them, the ATI setup may spin normal, i was referring to the vortech setup. more than likely he's running f body accessories and the vortech carb'd kit is his best bet, especially with the price being only about 2500, and then being able to sell the carb enclosure for a good chunk thus giving him the setup fairly cheap, only leaving a crank pulley to be fabbed along with intake / intercooler piping.

89formulalt1

I was wondering if you had any pics of the supercharger on the lt1 in the third gen.If you do could you email them to me storm22475@hotmail.com thanks.