You better put that transmission on there and make sure it clears the axle and CV joint. Looks really low low mounted.
You will also have to brace the back of the alt. Just having it hang on those 2 pivot points will cause the alt to pull inward when you tighten the belt to proper tension.
Day 3... ish So I've decided to ditch my first attempt at building a low mount. On my first attempt i tried to build in adjust-ability to avoid running a tensioner but that wouldn't be strong enough. So... here is how you make a tensioner bracket.
First you must notch out the Grand Prix dog bone mount so all the mounting holes are the same height, they should be around 20mm after the cut. The best tool for this job is a regular hack saw, a sawzall clogs quickly, and an angle grinder tends to kick a lot in aluminum.
Next is the standard alternator bracket. In Fiero applications the heater hose relocation built into this bracket is no longer necessary. Cut the bracket right before the 2 closest bolt holes to remove the coolant lines. now the next part is to remove 20mm behind the remaining 2 bolt holes and the area between.
you can remove the remaining alternator mounting location.
Now the 2 trimmed brackets should now fit together nicely using the same holes
some trimming may still be necessary.
The brackets fit on using all the same bolts that ore off of the dog bone mount.
Now the last step is to change the pulley on the tensioner, it has left handed threads, the ribbed one off of the coil pack bracket fits nicely. Later today i will finish building solid mounts for my alternator. \
[This message has been edited by ckrummy (edited 04-19-2010).]
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03:01 AM
darkhorizon Member
Posts: 12279 From: Flint Michigan Registered: Jan 2006
I am really diggin' that color combination... what is the exact color of the belt trim? It looks like it could be silver, grey or white but with the lighting I cannot tell... very well done two tone.
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03:19 PM
blackrams Member
Posts: 31841 From: Hattiesburg, MS, USA Registered: Feb 2003
I suggest putting the "dogbone" on the trans "snout" (diff housing) seeing how you have an auto.
Sorry i don't have an auto, the one you see is broke and i won't live with an auto anyway. i'll look into welding it but i think it's just a matter of time with these brackets. it should just be a standard grand prix dog bone mount so i can always get another one. I'll finish my low mount tomorrow and post some pics and also show you how to make a mock up belt.
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01:27 AM
PFF
System Bot
Apr 21st, 2010
ckrummy Member
Posts: 517 From: Lexington, KY Registered: Oct 2008
I finally got some work on my low mount, i was lazy yesterday. Here is the back mount
And this is the top, it still needs a little tweaking and a new bolt
and the lower, just needs a bolt
Here is how i routed my belt
I know it looks like it hits but there is a small gap. I'll watch it and make sure it's not a problem when it's running. This is my "mock up belt" it's just the original GP belt cut and wired together so now i just have to take it into my local parts store and find one that matches.
I had a little set back, ruined an idler pulley, not much to say but carb cleaner and welding, i feel stupid.
[This message has been edited by ckrummy (edited 04-21-2010).]
It looks like your going without A/C? If so, you should have put the alt in the place of the compressor. That way you can avoid cutting the alum dogbone mount, and the alt will be mounted even lower and closer to the front for better weight distribution.
The last reason is it will offer more belt wrap on the pullies. You are a bit thin in that area. This is how I did mine. I don't have a pic of the front of the engine off hand.
Hey guys, I just remounted a caddy 140amp alternator on my block where the AC was to replace my fiero alternator I had been using. What method are you guys using to be sure the pulleys line up exactly?
I wrapped a belt around the alt and crank and slid the belt around the pulleys, watching to see where the belt would approach the alt pulley. If it approached too high on the outside groove, I moved it out, etc. Is there an better/easier way than this?
Hey guys, I just remounted a caddy 140amp alternator on my block where the AC was to replace my fiero alternator I had been using. What method are you guys using to be sure the pulleys line up exactly?
I wrapped a belt around the alt and crank and slid the belt around the pulleys, watching to see where the belt would approach the alt pulley. If it approached too high on the outside groove, I moved it out, etc. Is there an better/easier way than this?
The way I did it, which might not be accurate, was to put tension on the belt. You then looked down along the belt path like the barrel of a gun on the flat side of the belt. If you move it out of alignment it will curve out at the tip of the pulley. When it is perfectly flat and level on the pulley, it should be lined up. The longer the space between the pulleys, the easier this is.
In other words, I eyed it
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02:36 PM
darkhorizon Member
Posts: 12279 From: Flint Michigan Registered: Jan 2006
Straight-edge on the pulley surface is my method... I figure the pulleys are machined, so they have to be flat. I can sorta kill 2 birds with one stone with that method, I can align it with all right angles so the belt loads evenly, and I can also easily eyeball the alignment (I figure if I eyeball bodywork, a belt drive would be ok eyeballed as well).
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04:31 PM
Apr 22nd, 2010
ckrummy Member
Posts: 517 From: Lexington, KY Registered: Oct 2008
I don't have any pics right now but i built the collector and did a some finish welding. I have tomorrow off so i should be able to get some stuff done.
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02:56 AM
PFF
System Bot
Apr 25th, 2010
ckrummy Member
Posts: 517 From: Lexington, KY Registered: Oct 2008
Sorry i haven't been updating recently i've been working a lot and didn't feel up to it.
I got my parts i ordered from zzperformance.
I've changed a bunch of gaskets, cleaned and ported my LIM, and reassembled my supercharger, including a 3.5 Modular pulley, and got my rear header built. I also changed my spark plugs to autolite 103's, to find that the old spark plugs had no electrode left, none,
but anyway here are some pics
Oh and i've been working on the wiring, i have 2 questions #1 there was a massive connection of black wires i the middle of the GTP wiring harness, is this just ground or what #2 where do all the pink wires go? Thanks.
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09:52 PM
darkhorizon Member
Posts: 12279 From: Flint Michigan Registered: Jan 2006
The inside walls of the blower should be smooth and shiny not rough and "ridged". This amount of wear will give you little boost as there will be a leak of pressure around the rotors.
------------------ " THE BLACK PARALYZER" -87GT 3800SC Series III engine, 3.4" Pulley, N* TB, LS1 MAF, Flotech Exhaust Autolite 104's Custom CAI 4T65eHD w. custom axles, HP Tuners VCM Suite. "THE COLUSSUS" 87GT - ALL OUT 3.4L Turbocharged engine, Garrett Hybrid Turbo, MSD ign., modified TH125H " ON THE LOOSE WITHOUT THE JUICE "
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01:34 PM
darkhorizon Member
Posts: 12279 From: Flint Michigan Registered: Jan 2006
The inside walls of the blower should be smooth and shiny not rough and "ridged". This amount of wear will give you little boost as there will be a leak of pressure around the rotors.
Sorry, you are quite wrong here... The walls of the blower wear in and get those grooves.. that is because there is a nearly postiive tolerance between the size of the rotors and the case...
The reason it is ruined, is because the outlet port was made larger... this will prevent the sealing ability of the rotors, letting boost leave through the way it came in.
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05:41 PM
ckrummy Member
Posts: 517 From: Lexington, KY Registered: Oct 2008
It's not that much larger maybe 1/4" on each side, i hope i didn't ruin it that's what people said to do online (not really experts) and as for the scoring on the housing that's really just clean spots once i sprayed it with carb cleaner its not as bad as it looks. But hey if i have to upgrade to a gen V i won't complain too much. How much boost should i get out of a 3.5" pulley in optimum running condition and what is the worst. I'll keep an eye on it.
But hey does anyone know about the pink wires, i need to know where to put them.