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Old 06-04-2006, 09:32 AM   #1
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Default Request for someone with a Gen I SC'd car

Hi Yall,

Got a strange request, sortta. Could someone with a Gen I sc'd car take a good digital picture of the belt routing/emmissions tag on the radiator shroud for me. Looking for one clear enough to be cropped and reprinted full size for the upper shroud of my '90 Bonneville.

Yeah, despite the advice (which I do appreciate) to do a complete engine swap, I'm going to go ahead and add the blower to the existing motor and accept that I might need to change the motor and transmission later.

The way I see it, I've got a low milage, well cared for LN3, that isn't worth a dime in resale if I pull it for a complete swap. Bumping the power up on it is a gamble, but it'* a risk that makes financial sense to me. If I do tear the motor'* bottom end up, or the transaxle, then I still have the option of swapping out the entire motor later. I spent a week looking for a complete sc'd motor only to come up with nothing local. So I went ahead and bought the '95 blower, manifold, etc. from a fellow, along with the brackets and pulleys from another list member.

The plan is to do the conversion in two stages if possible. Step one is to get the brackets, balancer, and accessories on first (Possibly using an idler to replace the SC if needed) to get the car ready, then wait for the next long weekend or expend a little vacation time to do the SC and wiring.
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Old 06-04-2006, 11:29 AM   #2
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Call it Series 1, there was no Gen1. 92/93 SSEi'* have the Gen2 supercharger, 94/95 have the Gen3. Using terms like this will help prevent confusion.

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Old 06-08-2006, 11:24 PM   #3
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Quote:
Originally Posted by willwren
Call it Series 1, there was no Gen1. 92/93 SSEi'* have the Gen2 supercharger, 94/95 have the Gen3. Using terms like this will help prevent confusion.
Thanks. That will work.
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Old 06-10-2006, 02:33 PM   #4
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If you are going to do this, I would at least get an oil cooler for it. And get the largest trans cooler you can fit in there. Heat is a tranny'* worst enemy (next to excessive torque and peg-legged starts), so the more heat dissipated, the longer your trans will last under high-stress conditions. Which I am sure your trans is going to see once it'* running
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Old 06-10-2006, 06:02 PM   #5
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Quote:
Originally Posted by sandrock
If you are going to do this, I would at least get an oil cooler for it. And get the largest trans cooler you can fit in there.
Prolly will. I'm not planning on hammering it too hard. Adding the SC is more like "Yeah, that would be a cool thing to get a little hands on experience with."

This project is going to take a little time. Spent today stripping the LT1 motor for the '94 Camaro V6-to-V8 swap. Glad I did, found water in #3 cylinder. It'* not coolant so I don't think I've got a cracked block, I think the motor got hosed down years ago before it was shipped to me and that got stuck in the cylinder. Found it when I pulled the spark plugs this morning. Either way, it ruined the bore, so it'* going to a machine shop Monday to be over bored. I'm hoping to have the Camaro V8-a-fied by the July 4th weekend, so I can do a little playing with the Bonneville.

Getting back on track here... I noticed that you have F-Body 3800 motor valve covers listed in your sig. Do they perchance have breathers and PCV valve fittings on them?

Short list of modifications to blower the 90 Bonnie includes comming up with a PCV system using valve covers, since the SC doesn't have PCV like the NA motor'* intake manifold.
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Old 06-11-2006, 02:26 PM   #6
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Quote:
Getting back on track here... I noticed that you have F-Body 3800 motor valve covers listed in your sig. Do they perchance have breathers and PCV valve fittings on them?
Nope...look like they came from the same molds as the FWD'*. I snagged them up as soon as I compared them to a Bonneville'* covers right next to the F-body, then had them bead blasted and cleared afterwards. I think they are a very nice addition to these motors, and sure beats spending 200 and change for custom aluminum ones.
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Old 06-11-2006, 03:13 PM   #7
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Quote:
Originally Posted by sandrock
Nope...look like they came from the same molds as the FWD'*.
Hmm, I must be missing something then. Where does the SC'd cars get their PCV and breather, if not the valve covers?
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Old 06-11-2006, 03:26 PM   #8
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No breather through the valve covers at all. The PCV is internal to the intake manifold or supercharger.
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Old 06-12-2006, 11:01 PM   #9
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http://forums.aaca.org/showflat.php?...e=0#Post361222

Above is a link to my thread at Reatta.net with lots of pics of converting my '89 LN3 to an L67.

I didn't use an engine oil cooler. My tuner, Ryan of GMtuners, said that we don't need to these days with synthetic oil. I did install a large transmission cooler though, flushing with Mobil 1 ATF and changing the filter.

I've got a few thousand miles on my setup and haven't had any difficulties. My LN3 had 153k when I did the swap, using almost no oil between changes. It'* a pretty tight engine still.

I made my own PCV system, using two front valve covers
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Old 06-12-2006, 11:29 PM   #10
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F14, I'm not sure your post really applies here considering the boost problems (or lack therof ) that you are currently experiencing. Your drivetrain has yet to see any stress.

I personally think GMTuners is incorrect. L67'* got an engine oil cooler for a reason. L67'* run hotter. Don't take chances. You can get wrecker parts to make the oil cooler happen for very little money from a 91-95 L67.

The tranny cooler is ABSOLUTELY a requirement, and I strongly suggest bypassing the core in the radiator when this is done.
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