Were the rotor housings designed with PP/semi-PP in mind?
Thread Starter
Lives on the Forum
Joined: Oct 2004
Posts: 5,150
Likes: 167
From: Japanabama
Were the rotor housings designed with PP/semi-PP in mind?
It seems odd that there is a spot in the casting that looks almost like it was designed to be turned into an intake port...
Or was this just a leftover artifact from when the engines were PP?
Or was this just a leftover artifact from when the engines were PP?
Old [Sch|F]ool
Joined: May 2001
Posts: 12,865
Likes: 571
From: Cleveland, Ohio, USA
That's where the coolant passage was for intake manifold heat for carburetors.
A heated intake manifold requires a lot less accelerator pump because the fuel is less likely to condense on the runners when the pressure goes from vacuum to near atmospheric, so emissions and fuel economy improve.
A heated intake manifold requires a lot less accelerator pump because the fuel is less likely to condense on the runners when the pressure goes from vacuum to near atmospheric, so emissions and fuel economy improve.
Thread Starter
Lives on the Forum
Joined: Oct 2004
Posts: 5,150
Likes: 167
From: Japanabama
That's where the coolant passage was for intake manifold heat for carburetors.
A heated intake manifold requires a lot less accelerator pump because the fuel is less likely to condense on the runners when the pressure goes from vacuum to near atmospheric, so emissions and fuel economy improve.
A heated intake manifold requires a lot less accelerator pump because the fuel is less likely to condense on the runners when the pressure goes from vacuum to near atmospheric, so emissions and fuel economy improve.
Old [Sch|F]ool
Joined: May 2001
Posts: 12,865
Likes: 571
From: Cleveland, Ohio, USA
Now the part that baffles me... you know the spot on the rear housing for the coolant nipple for the throttle body coolant hose on fuel injected cars?
Why do the housings from pre injection 12A/13B have a boss there?
Why do the housings from pre injection 12A/13B have a boss there?
Trending Topics
It clearly was never designed for alternate porting. Because if it was, then it was poorly executed by having to bridge between or block off the coolant jacket running through there.
.
.
Thread
Thread Starter
Forum
Replies
Last Post
djchiptoothsfc
2nd Generation Specific (1986-1992)
31
Mar 14, 2013 01:45 PM