Gil Exhaust mod....
#1
Registered
VIP Member
Thread Starter
iTrader: (8)
Join Date: Sep 2006
Location: CapeComa,FL
Posts: 1,391
Likes: 0
Received 0 Likes
on
0 Posts
Gil Exhaust mod....
Two things I would like to do...
Skip the rubber hoses and go to braided...
Figure out "what" the smaller one is for....
Can I cut this off and weld in an AN bung?
What AN size should I shoot for if yes....
Pic 2.....why is it there? Is this a dump? Can I plumb this to the transom? Is this a good point to grab pressure and temp?
Skip the rubber hoses and go to braided...
Figure out "what" the smaller one is for....
Can I cut this off and weld in an AN bung?
What AN size should I shoot for if yes....
Pic 2.....why is it there? Is this a dump? Can I plumb this to the transom? Is this a good point to grab pressure and temp?
#2
Registered
iTrader: (30)
rich. the braided hose size you need is # 18 its an odd size pretty sure its direct from earls .can be ordered from summit or jegs 20 ft only and its a non stock item .im guessing they just order it from earls as well .get the slip om ends as well they are the same as used on hp 500s
#4
Registered
VIP Member
Thread Starter
iTrader: (8)
Join Date: Sep 2006
Location: CapeComa,FL
Posts: 1,391
Likes: 0
Received 0 Likes
on
0 Posts
An 18....good to know. Last thing I want is to restrict.....had a hot spot in two of them before......like 110.... But enough to make me leery....
So fixx.....I get what you mean.....so it is essentially a dump? Is there a reason I can't plumb this through the transom above the waterline? Maybe hardline it into the exhaust stream for a bit more "mist cloud" behind the fukkula?
So fixx.....I get what you mean.....so it is essentially a dump? Is there a reason I can't plumb this through the transom above the waterline? Maybe hardline it into the exhaust stream for a bit more "mist cloud" behind the fukkula?
#5
Registered
iTrader: (1)
Join Date: Aug 2006
Location: Ontario, OH
Posts: 2,465
Likes: 0
Received 0 Likes
on
0 Posts
The little bung on the bottom should have a hose coming from another little bung on the back of the manifold. There should be a little hose that runs from the manifold to the the riser, in addition to the bigger hose on the front side of the manifold that runs to the riser.
I'm pretty sure it's there to keep hot spots/steam pockets out of the rear of the exhaust manifold and you do need it. At least that's how it was plumbed on the last set I worked on.
I'm pretty sure it's there to keep hot spots/steam pockets out of the rear of the exhaust manifold and you do need it. At least that's how it was plumbed on the last set I worked on.
#6
Registered
VIP Member
Thread Starter
iTrader: (8)
Join Date: Sep 2006
Location: CapeComa,FL
Posts: 1,391
Likes: 0
Received 0 Likes
on
0 Posts
An what?
Gordon....
At 50 bux each.....I'll do it (while hating it with twins) but I am not finding an18.....
16 and 20.....and I would guess 20....lesser of two evils...
Should I expect an issue with a bigger diameter? I'm thinking no...but is this an area where an unbalanced system can f-me?
Deezy."
So what is to stop me from taking the two small ports (manifold and Gil) routing them up (hardline) and combining via "y" then through transom.....as a dump....??
I just want to know if I am screwing up the flow ratio and introducing an opportunity for higher temps.....or pressure that could ultimately make my gil's leak.....
At 50 bux each.....I'll do it (while hating it with twins) but I am not finding an18.....
16 and 20.....and I would guess 20....lesser of two evils...
Should I expect an issue with a bigger diameter? I'm thinking no...but is this an area where an unbalanced system can f-me?
Deezy."
So what is to stop me from taking the two small ports (manifold and Gil) routing them up (hardline) and combining via "y" then through transom.....as a dump....??
I just want to know if I am screwing up the flow ratio and introducing an opportunity for higher temps.....or pressure that could ultimately make my gil's leak.....
#7
Registered
iTrader: (2)
Join Date: Aug 2005
Location: Between A Womans Leggs in IL
Posts: 6,306
Likes: 0
Received 1 Like
on
1 Post
fixx
Gordon....
At 50 bux each.....I'll do it (while hating it with twins) but I am not finding an18.....
16 and 20.....and I would guess 20....lesser of two evils...
Should I expect an issue with a bigger diameter? I'm thinking no...but is this an area where an unbalanced system can f-me?
Deezy."
So what is to stop me from taking the two small ports (manifold and Gil) routing them up (hardline) and combining via "y" then through transom.....as a dump....??
I just want to know if I am screwing up the flow ratio and introducing an opportunity for higher temps.....or pressure that could ultimately make my gil's leak.....
At 50 bux each.....I'll do it (while hating it with twins) but I am not finding an18.....
16 and 20.....and I would guess 20....lesser of two evils...
Should I expect an issue with a bigger diameter? I'm thinking no...but is this an area where an unbalanced system can f-me?
Deezy."
So what is to stop me from taking the two small ports (manifold and Gil) routing them up (hardline) and combining via "y" then through transom.....as a dump....??
I just want to know if I am screwing up the flow ratio and introducing an opportunity for higher temps.....or pressure that could ultimately make my gil's leak.....
#8
Charter Member # 55
Charter Member
AN 20 will be an 1/8" too large and AN 16 is 1/8" too small. I tried both when I needed to replace one of the top hoses on my 525SC and neither would work. It needs to be AN 18 to fit a 1" pipe fitting. I didn't find any AN 18 locally and finally just used 1" rubber heater hose.
The top hoses on my 525SC were AN 18.
The top hoses on my 525SC were AN 18.
#9
Registered
iTrader: (30)
Gordon....
At 50 bux each.....I'll do it (while hating it with twins) but I am not finding an18.....
16 and 20.....and I would guess 20....lesser of two evils...
Should I expect an issue with a bigger diameter? I'm thinking no...but is this an area where an unbalanced system can f-me?
Deezy."
So what is to stop me from taking the two small ports (manifold and Gil) routing them up (hardline) and combining via "y" then through transom.....as a dump....??
I just want to know if I am screwing up the flow ratio and introducing an opportunity for higher temps.....or pressure that could ultimately make my gil's leak.....
At 50 bux each.....I'll do it (while hating it with twins) but I am not finding an18.....
16 and 20.....and I would guess 20....lesser of two evils...
Should I expect an issue with a bigger diameter? I'm thinking no...but is this an area where an unbalanced system can f-me?
Deezy."
So what is to stop me from taking the two small ports (manifold and Gil) routing them up (hardline) and combining via "y" then through transom.....as a dump....??
I just want to know if I am screwing up the flow ratio and introducing an opportunity for higher temps.....or pressure that could ultimately make my gil's leak.....