LT1-LT4 Modifications 1993-97 Gen II Small Block V8

LT1 Rebuild & Swap into 3rd Gen

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Old Oct 14, 2022 | 11:12 AM
  #61  
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Originally Posted by MMBM
You'll want to swap your valve covers from side to side👍
I have a dual ventilation setup from both valve covers to a catch can. These purple covers are being recycled from the TPI.



Passenger side ventilation.

Drivers side. Awe…….say goodbye to those Perty blue roller rockers 😔


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Old Oct 15, 2022 | 05:21 AM
  #62  
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Originally Posted by 64GunPilot
I have a dual ventilation setup from both valve covers to a catch can. These purple covers are being recycled from the TPI.



Passenger side ventilation.

Drivers side. Awe…….say goodbye to those Perty blue roller rockers 😔
I see, I did notice the one cover wasn't a LT1 cover because of the hole (normally driver's side is solid, no holes). Anyway, after posting, I noticed they weren't even bolted on yet....dual feed setup makes sense, I apologize for jumping the gun👍
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Old Oct 15, 2022 | 05:31 AM
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Originally Posted by MMBM
I see, I did notice the one cover wasn't a LT1 cover because of the hole (normally driver's side is solid, no holes). Anyway, after posting, I noticed they weren't even bolted on yet....dual feed setup makes sense, I apologize for jumping the gun👍
No worries, I learned something from your post……I didn’t know these weren’t standard TPI covers. I bought this car pretty much as-is and didn’t know much about anything. So it’s all good. I will likely have to remove the oil fill spout and just Screw the cap directly to the cover due to my shock tower brace. Well see.

Its good to have all you guys input. It’s helped a bunch already. I still have a long ways to go.
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Old Oct 15, 2022 | 05:48 AM
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Originally Posted by 64GunPilot
No worries, I learned something from your post……I didn’t know these weren’t standard TPI covers. I bought this car pretty much as-is and didn’t know much about anything. So it’s all good. I will likely have to remove the oil fill spout and just Screw the cap directly to the cover due to my shock tower brace. Well see.

Its good to have all you guys input. It’s helped a bunch already. I still have a long ways to go.
You're covers may very well be TPI, I was just saying on a LT1 f-body, the driver's side has no holes at all. Hard to tell from pictures, and doesn't matter in your application, but here's my driver's side on my '96 Formula WS6👍



On a 4th gen you can still access oil fill cap with the strut tower brace, hopefully on your 3rd gen you'll be as fortunate!
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Old Oct 15, 2022 | 09:39 AM
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Originally Posted by MMBM
You're covers may very well be TPI, I was just saying on a LT1 f-body, the driver's side has no holes at all. Hard to tell from pictures, and doesn't matter in your application, but here's my driver's side on my '96 Formula WS6👍



On a 4th gen you can still access oil fill cap with the strut tower brace, hopefully on your 3rd gen you'll be as fortunate!
Thats a nice clean bay!

So do y’all think I should still run the PCV valve on the side of the manifold with the metal tube that wraps around and dumps back into the intake? Leave it in place?







what about theses two ports on the throttle body? Cap them off?






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Old Oct 15, 2022 | 10:06 AM
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The bottom one doesn’t necessarily need to be capped off since it is for coolant to pass through the TB. The top one, yes since that is the neutral flowing passage for the PCV system.
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Old Oct 15, 2022 | 04:43 PM
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Originally Posted by SS RRR
The bottom one doesn’t necessarily need to be capped off since it is for coolant to pass through the TB. The top one, yes since that is the neutral flowing passage for the PCV system.
I’ll just cap it all off, even the coolant passages because they are rusted and ugly.
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Old Oct 15, 2022 | 05:03 PM
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You can just pull the TB water fittings right out, that's the cleanest look IMO. For the 3/4" fittings that snap into the valve covers, toss the pipe thread and get a pair of these. They snap right into the factory rubber grommet.

https://www.oreillyauto.com/detail/c...tor/gat0/28625
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Old Oct 15, 2022 | 10:07 PM
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Originally Posted by 64GunPilot
Thats a nice clean bay!

So do y’all think I should still run the PCV valve on the side of the manifold with the metal tube that wraps around and dumps back into the intake? Leave it in place?







what about theses two ports on the throttle body? Cap them off?



The top port on the TB is the fresh air source for the PCV, the bottom port is for the canister purge valve.


You can setup the PCV valve like the Vettes, it cleans it up a bit. Switch the opti vent port with the PCV port.
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Old Oct 15, 2022 | 10:37 PM
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That reminds me, forgot to say you need to keep a functioning PCV valve. It flows under vacuum and the valve cover vents let out blowby. They flow in opposite directions.
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Old Oct 16, 2022 | 10:26 AM
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From: Jackstandican
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Originally Posted by Supercharged111
That reminds me, forgot to say you need to keep a functioning PCV valve. It flows under vacuum and the valve cover vents let out blowby. They flow in opposite directions.
That has me wondering, OP. How is this system of yours ventilated? I see oil residue on the canister. Is it able to breathe? If so, why. Not keep it simple and put breathers on each valve cover?
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Old Oct 16, 2022 | 12:22 PM
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Originally Posted by SS RRR
That has me wondering, OP. How is this system of yours ventilated? I see oil residue on the canister. Is it able to breathe? If so, why. Not keep it simple and put breathers on each valve cover?
That is the worst idea I think I have heard. I absolutely hate those breathers. Nothibg like a nice oil film spray to coat everything under your hood. Catch can then into a header evac system on one side. Factory PCV valve on the other. Keeps oil spray out of your intake at WOT and the crankcase under a vacuum at all times.
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Old Oct 16, 2022 | 04:08 PM
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Originally Posted by Fast355
That is the worst idea I think I have heard. I absolutely hate those breathers. Nothibg like a nice oil film spray to coat everything under your hood.
I know, but looking at the pic of that canister, it appears it's doing that anyway. Yes, when having breathers one must be vigilant in cleaning the surrounding areas from oil spray. Aren't you the one who has the engine bay so immaculate you could use it as a clean room? If so, I understand your point. May not be so important for those of us who are dirty girls!
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Old Oct 16, 2022 | 05:55 PM
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Originally Posted by Supercharged111
That reminds me, forgot to say you need to keep a functioning PCV valve. It flows under vacuum and the valve cover vents let out blowby. They flow in opposite directions.
Done. Thanks.

Originally Posted by SS RRR
That has me wondering, OP. How is this system of yours ventilated? I see oil residue on the canister. Is it able to breathe? If so, why. Not keep it simple and put breathers on each valve cover?
Embarrassed to say I have not touched that catch can since I have owned the car. It could be completely full for all I know. So, I’ll give some attention and clean it up and see if it’s ventilating.

Originally Posted by Fast355
That is the worst idea I think I have heard. I absolutely hate those breathers. Nothibg like a nice oil film spray to coat everything under your hood. Catch can then into a header evac system on one side. Factory PCV valve on the other. Keeps oil spray out of your intake at WOT and the crankcase under a vacuum at all times.
If you post some detailed pics of your setup with the 45 degree ports and whatnot I’d love to see it. Hey Supercharged, is this legal?
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Old Oct 16, 2022 | 09:11 PM
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Originally Posted by Supercharged111
That reminds me, forgot to say you need to keep a functioning PCV valve. It flows under vacuum and the valve cover vents let out blowby. They flow in opposite directions.
Running a vacuum/PCV can benefit in keeping some vapors internal, but for his system it isn't necessary. The tube(s) coming out of the VC is a breather tube and is neutral flowing.
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Old Oct 19, 2022 | 02:01 AM
  #76  
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Cleaned up the catch can. It is vented but used a shop towel as a breather. Maybe I’ll vent it out through my exhaust using an evac port near the manifolds. Too easy. It had about a 1/2 pint of oil in it.

Disassembled the optispark. Broke it. Three of the 4 cap screws were corroded to the point of snapping. I have 2 other optisparks I was gonna use as spares. Took one and disassembled it and all was good. Cleaned up the contacts, sealed and reassembled. Bearing felt like crap but I’m gonna send it. Installed and torqued.

The used B-Body water pump I bought on eBay was junk. Got my refund. Gonna clean up the existing F-Body pump and install tomorrow.

Then it’s time to clean and organize the shop in preparation for the Racecar tear down.

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Old Oct 30, 2022 | 08:54 AM
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Default O2 sensor locations

My passenger side exhaust manifold has a place for an O2 sensor but the drivers side manifold does not. Is this normal? Am I gonna have to weld in a bung in my exhaust? My TPI only has one O2 sensor in the drivers side. I’ve searched and have only found that the 1995 has three O2 sensors (2 that actually used for air/fuel ratio).





Passenger side O2 bung and EGR port.

Drivers side no O2 bung

Drivers side
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Old Oct 30, 2022 | 01:11 PM
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Originally Posted by 64GunPilot
If you post some detailed pics of your setup with the 45 degree ports and whatnot I’d love to see it. Hey Supercharged, is this legal?
Wish I had some good pictures of it. Being in a van its a complete PITA to get clean pictures. This is the basic idea. It just has two check valves, one in each exhaust pipe. My catch can is on the frame rail.



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Old Oct 30, 2022 | 07:37 PM
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Originally Posted by Fast355
Wish I had some good pictures of it. Being in a van its a complete PITA to get clean pictures. This is the basic idea. It just has two check valves, one in each exhaust pipe. My catch can is on the frame rail.

have you tried just 1 bank only? or was there a stronger signal with 1 in each bank?
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Old Oct 30, 2022 | 07:43 PM
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Yes you'll need to weld a bung in, but you should have some exhaust from the donor for this no?

Last edited by Supercharged111; Oct 30, 2022 at 08:23 PM.
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