RanchWelder
Full Access Member
- Joined
- Jan 14, 2023
- Posts
- 846
- Reaction score
- 1,204
- Location
- Earth
- First Name
- --------
- Truck Year
- 87
- Truck Model
- Blazer
- Engine Size
- 350ci
Here's the next update.
The headers installed are Hooker Cast Iron with 2-1/2" collector down-pipe.
Harris tuning suggested eBay Cat's.
So for $35 make offer each, the seller sold me converters, so I'm 50 state legal with the short exhaust.
They are 3" and will be necked down as slip-over for the 2-1/2" piping and at the collector they will weld direct.
I'm not sure if the OBD1 O2 sensor should be below the cat or not.
Let me know what you would recommend for best location "up stream" sensor using OBD1.
I'm considering the cats will be directly after the cast iron?
Ir down an inch or two max.
The three wire O2 mod has been done.
Usually you want them a bit further away than the 1wire O2 because it has a heater inside and doesn't foul up from soot if it's a little further away.
I'm listening if anyone has suggestions for best location if the new bung for three wire O2.
The remote oil filter plate is Moroso.
It wAs slightly used and very cheap.
The 45 degree fittings made it simple.
No 90's in the runs.
Made a bracket for under the brake master cylinder and used Summit Racing adaptor up top.
Here:
The Summit adaptor is drilled 1/4" NPT and reduced to the 1/8" NPT oil pressure sending line.
This allows me room for the extra long tractor filter later on, for added oil and extra cooling.
With the cat's so close, despite bot going long tube headers, it made sense to add the remote system to get the filter away from the exhaust.
The added benefit of moving the oil pressure sensor plumbing, is accurate pressure at the remote filter. Not at the original filter location or the top of the block.
Let me know where you guys would suggest welding the O2?
The headers installed are Hooker Cast Iron with 2-1/2" collector down-pipe.
Harris tuning suggested eBay Cat's.
So for $35 make offer each, the seller sold me converters, so I'm 50 state legal with the short exhaust.
They are 3" and will be necked down as slip-over for the 2-1/2" piping and at the collector they will weld direct.
I'm not sure if the OBD1 O2 sensor should be below the cat or not.
Let me know what you would recommend for best location "up stream" sensor using OBD1.
I'm considering the cats will be directly after the cast iron?
Ir down an inch or two max.
The three wire O2 mod has been done.
Usually you want them a bit further away than the 1wire O2 because it has a heater inside and doesn't foul up from soot if it's a little further away.
I'm listening if anyone has suggestions for best location if the new bung for three wire O2.
The remote oil filter plate is Moroso.
It wAs slightly used and very cheap.
The 45 degree fittings made it simple.
No 90's in the runs.
Made a bracket for under the brake master cylinder and used Summit Racing adaptor up top.
Here:
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You must be registered for see images attach
The Summit adaptor is drilled 1/4" NPT and reduced to the 1/8" NPT oil pressure sending line.
This allows me room for the extra long tractor filter later on, for added oil and extra cooling.
With the cat's so close, despite bot going long tube headers, it made sense to add the remote system to get the filter away from the exhaust.
The added benefit of moving the oil pressure sensor plumbing, is accurate pressure at the remote filter. Not at the original filter location or the top of the block.
Let me know where you guys would suggest welding the O2?
