SuperBuickGuy
Well-known member
Does the stewart pump have the bypass in it?
(small hole on the passenger side under the mounting bolt)
(small hole on the passenger side under the mounting bolt)
Oh well, one problem after another
- Thread starter Belgian1979vette
- Start date
Belgian1979vette
Well-known member
I was reading your post on SpeedTalk and was wondering.
Why are you using a SB2 pump? The normal outlets to the block are usually blocked on those although on some pumps they can be removed, others don't have the hole at all. The side outlets are for running -12 directly to the side of the block, something no std. block has unless you drill it ?
I assume these are the pics of the pump?
I have a similar pumps, one from Stewart and one from Adams. I didn't even know you could order it from summit???? Also, they tend to have the larger pump shaft so the stock pulleys will not fit, although a 19mm drill will take care of the pulleys since it's a 19.2mm hole that you need.
Not a SB2 but it is a bowtie block with siamesed bores. The bypass holes are not drilled in the block either, so I run a Stewart thermostat with the bypass holes in them. Takes a little longer to warm up I guess but that's it. Beside that it looks as any normal SBC pump with the holes.
As for the sidebosses, yes. I use those. But not -12 lines. I run a -8 to the center of the heads (where the 2 valves are)
My pulley fit fine. Its a 3/4 inch shaft. Maybe it has been drilled before, don't know. The original engine in this car was modified in lots of ways as well. It had the old iron turbo heads for instance and some pistons from an original LT1. Maybe they took the pulleys from an LT1 as well. Don't know if the LT1 had an upgraded high rpm pump with larger shaft.
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Belgian1979vette
Well-known member
Does the stewart pump have the bypass in it?
(small hole on the passenger side under the mounting bolt)
SBG, the pump doesn't have the hole. You need to use their thermostat with 3 vent holes in them for that.
SuperBuickGuy
Well-known member
Does the stewart pump have the bypass in it?
(small hole on the passenger side under the mounting bolt)
SBG, the pump doesn't have the hole. You need to use their thermostat with 3 vent holes in them for that.
I got lost on that.... you used the word "their" do you mean Stewart's or Edelbrock's?
the reason I ask, if the pump was spinning dry, that could be the cause of the failure of the seal...
Belgian1979vette
Well-known member
Does the stewart pump have the bypass in it?
(small hole on the passenger side under the mounting bolt)
SBG, the pump doesn't have the hole. You need to use their thermostat with 3 vent holes in them for that.
I got lost on that.... you used the word "their" do you mean Stewart's or Edelbrock's?
the reason I ask, if the pump was spinning dry, that could be the cause of the failure of the seal...
Stewart's.
No it has not been spinning. Spent it's life in a box after I received it untill I used it to mount it on th engine.
SuperBuickGuy
Well-known member
Does the stewart pump have the bypass in it?
(small hole on the passenger side under the mounting bolt)
SBG, the pump doesn't have the hole. You need to use their thermostat with 3 vent holes in them for that.
I got lost on that.... you used the word "their" do you mean Stewart's or Edelbrock's?
the reason I ask, if the pump was spinning dry, that could be the cause of the failure of the seal...
Stewart's.
No it has not been spinning. Spent it's life in a box after I received it untill I used it to mount it on th engine.
that's the best I got..... sounds like somewhere in its shelf life, a seal got hot... I'll add this to the stuff I learned this year, I thought they had pretty much an infinite shelf life (anti-freeze being flammable being another thing I learned).
Belgian1979vette
Well-known member
Not sure it's being on the shelf that caused this. Some other guy at Speedtalk seems to have had the same issues with the same pump...could be a bad series.
