LSJ Supercharged Ecotec Swap (Page 8/45)
ccfiero350 AUG 29, 08:47 PM
I think it would be a little trickier with the earler subframes with the toe links and all.

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yellow 88 GT, not stock
white 88 notchie, 4 banger

Riceburner98 SEP 05, 08:39 PM
Hey... In an effort to not hijack your thread into an alternator thread, I started a new one --> http://www.fiero.nl/forum/Forum2/HTML/085824.html about building an alternator "exciter" thingamabob. It's already prototyped and outputting 128Hz at a 50% duty cycle, just need to figure out how many inputs people would want on the thing and what voltage they should output... Also timers, etc... Should be cake.
ccfiero350 SEP 08, 11:02 PM
The brackets to mount the transmission are made from 1/4 plate steel cut by hand with the plasma cutter.



But first I made poster board templates after the engine is postioned relative to the subframe.



Fresh off the grinder.



The rear was done the same way, ovoiding the stock rear sway bar at full droop.



The 1/4 thick plate is great at the welds and bolt holes strength wise, but really too much metal for the job in the web areas, so a few well placed holes take a bite out of the excess weight while keeping it strong enough for the job.



Same for the front mount.



Mounted in place it looks pretty cool too.



The 2x3 tube brackets are the same front and back from 1/8 flat bar stock. The 1/2 bolt hole was drilled through all 4 pieces at once on the drill press before they were welded on.

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yellow 88 GT, not stock
white 88 notchie, 4 banger

ccfiero350 SEP 09, 09:12 PM
The center engine mount proved to be tricker then the other mounts. The engine has two good bolt bosses on the exhaust side. The best place for the mount would have been directly under the crank but there no good bolt bosses on the intake side to make a good straddle mount.



I had a big piece of 4" angle, 1/4 thick, that started the whole thing off.



I placed the pivot in front of the toe link so I could get at both fasteners with a wrench. The crush tube goes through to the pocket.



Here it is welded up. The area directly under the bolt is releaved to allow clearance for the bushing once assembled.



Pleanty of room to put a wrench on it.



Fore & aft clearance.



The inside support bracket was cut from a c-channel piece from an old rack we had at work, it's 7/32 thick and over lapes the bottom of the subframe about an inch.

This images is larger than 102400 bytes. Click to view.

The center mount was made with really thick stuff so out came the drills.

Everything bolt up well enough to start the last mount, torque strap. I'll need to test fit the engine/subframe in the car then fab the strap.

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yellow 88 GT, not stock
white 88 notchie, 4 banger

Austrian Import SEP 10, 01:36 AM
Wow!! That's a lot of work to make this engine work. I'm in awe!!
jmarek78 SEP 15, 12:21 PM
Wow, you've really gone over the top with this project. Have you fitted the motor into the car yet? Nice work!
ccfiero350 SEP 15, 10:52 PM
I'm going to have to put it in if I'm ever going to drive the notchie again. Blew the 2.5L today at Texas World Speedway. Down shifted, blipped the throttle and my foot slipped off the brake pedal and matted the throttle just as I released the clutch. Don't know how high it went but lost a cylinder at turn one by then end of turn two I had zero oil pressure. Turned off the track before turn 3 and it sounded just like a VW flat 4 running on three.

So I'll be motivated to move this along as fast as I can or I'll miss some track time.

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yellow 88 GT, not stock
white 88 notchie, 4 banger

CTFieroGT87 SEP 16, 11:12 AM
Fantastic work. I've been thinking of Fieroguru's strengthened cradle and what you did for the rear crossmember looks great!

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Christian Thomas
87 Pontiac Fiero GT Burgandy/Silver 5.7L ZZ4 5spd,88 suspension, C6 polished wheels, C5 Z06 brakes, Konis, poly'd, Spec Stg 3
301rwhp/345rwtq


06 Cobalt SS/SC w/ LSD (the slow DD)

Flyguyeddy SEP 19, 06:13 PM
how much did the Thelin sells kit cost?

do you have mechanical drawings of your mounts for the supercharged engine?
ccfiero350 SEP 19, 09:22 PM
Roger's link is at the top of the page. Roger probably has plans for a LSJ version as soon as he gets his hands on one.

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yellow 88 GT, not stock
white 88 notchie, 4 banger