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Re: Drilling and tapping Indy SB intake for bypass hose
[Re: mshred]
#1546482
12/11/13 05:44 PM
12/11/13 05:44 PM
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Joined: Jul 2010
Posts: 2,091
Delray beach, Florida
Performance Only
top fuel
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top fuel
Joined: Jul 2010
Posts: 2,091
Delray beach, Florida
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I don't have one here in front of me to measure, but I thought the nipple was 1/2" NPT and that would need a 23/32 drill bit
machine shop owner and engine builder
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Re: Drilling and tapping Indy SB intake for bypass hose
[Re: mshred]
#1546484
12/11/13 10:09 PM
12/11/13 10:09 PM
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Joined: Oct 2009
Posts: 1,267
North, Alabama
D-50
pro stock
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pro stock
Joined: Oct 2009
Posts: 1,267
North, Alabama
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Quote:
Does anybody know what size hole needs to be drilled into an intake to use a water pump bypass hose? Also, what size threads to tap for the nipple that would go into it? I picked up an Indy 360-3 intake and this area is currently closed off, and I would like to run the bypass hose since this is a street car.
I am using the Indy intake also without the bypass hose. I drive mine on the street and it never gets over 170* if that is what you are worried about. I have a thermostat in it with the center knocked out, so the water will circulate when I am cooling between rounds. I am running a Proform electric water pump and a electric fan pushing from the outside of the radiator.
1.33 60 ft,6.21 at 110.59 in the 1/8, pump gas small block,2950lbs,drag radials,mufflers and driven to track ...
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Re: Drilling and tapping Indy SB intake for bypass hose
[Re: mshred]
#1546485
12/11/13 10:31 PM
12/11/13 10:31 PM
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Joined: Jun 2004
Posts: 1,496
Sask, Can.
72demon416
pro stock
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pro stock
Joined: Jun 2004
Posts: 1,496
Sask, Can.
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Quote:
Does anybody know what size hole needs to be drilled into an intake to use a water pump bypass hose? Also, what size threads to tap for the nipple that would go into it? I picked up an Indy 360-3 intake and this area is currently closed off, and I would like to run the bypass hose since this is a street car.
I had my 360-3 intake drilled for the bypass hose and it required a 3/4 npt tap according to Ryan Johnson.
See our conversation about it:
Quote:
Ryan, did you remember to modify it to accommodate the bypass hose?
Height wise, yeah it better damn well be about same as your M1 LOL But no spacer required on this...
Forgot about the bypass hose, you're the only person I know who still runs one... looks like I'll be breaking out the 3/4" NPT tap tomorrow. LOL [end quote]
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Re: Drilling and tapping Indy SB intake for bypass hose
[Re: 72demon416]
#1546486
12/11/13 10:41 PM
12/11/13 10:41 PM
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Joined: Jun 2009
Posts: 171
Indy
moparman89
member
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member
Joined: Jun 2009
Posts: 171
Indy
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Its a 3/4 NPT nipple, I just bought one last night.
School of Automotive Machinists Racing
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Re: Drilling and tapping Indy SB intake for bypass hose
[Re: 80arrow]
#1546490
12/12/13 12:10 AM
12/12/13 12:10 AM
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Joined: Oct 2009
Posts: 1,267
North, Alabama
D-50
pro stock
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pro stock
Joined: Oct 2009
Posts: 1,267
North, Alabama
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Quote:
I am using the Indy intake also without the bypass hose. I drive mine on the street and it never gets over 170* if that is what you are worried about. I have a thermostat in it with the center knocked out, so the water will circulate when I am cooling between rounds. I am running a Proform electric water pump and a electric fan pushing from the outside of the radiator.
Was your intake machined for a thermostat or is your goose neck machined for a thermostat? Sorry to hi-jack your thread.
Sorry, I do not remember which one was machined for the thermostat. I got the t-housing from Mancini I think.
1.33 60 ft,6.21 at 110.59 in the 1/8, pump gas small block,2950lbs,drag radials,mufflers and driven to track ...
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Re: Drilling and tapping Indy SB intake for bypass hose
[Re: mshred]
#1546491
12/12/13 12:39 AM
12/12/13 12:39 AM
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Joined: Jun 2003
Posts: 52,972
Romeo MI
MR_P_BODY
Master
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Master
Joined: Jun 2003
Posts: 52,972
Romeo MI
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Quote:
Guys, isn't the reason behind the bypass hose to keep water from the block circulating when using a thermostat to avoid building up pressure?
I would like to still run a thermostat as this is a street car, and from what I have read using a stat far outweighs using a retrictor plate or nothing at all in a street car.
I am also running an edelbrock high flow mechanical water pump.
Unless I am missing something, is there some sort of benefit to not running the bypass hose when using a thermostat?
The reason is to keep the heat in the engine to warm
up quicker for the heater and now days for emissions
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Re: Drilling and tapping Indy SB intake for bypass hose
[Re: MR_P_BODY]
#1546492
12/12/13 12:45 AM
12/12/13 12:45 AM
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Joined: Apr 2009
Posts: 3,415
Toronto
mshred
OP
master
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OP
master
Joined: Apr 2009
Posts: 3,415
Toronto
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Quote:
Quote:
Guys, isn't the reason behind the bypass hose to keep water from the block circulating when using a thermostat to avoid building up pressure?
I would like to still run a thermostat as this is a street car, and from what I have read using a stat far outweighs using a retrictor plate or nothing at all in a street car.
I am also running an edelbrock high flow mechanical water pump.
Unless I am missing something, is there some sort of benefit to not running the bypass hose when using a thermostat?
The reason is to keep the heat in the engine to warm
up quicker for the heater and now days for emissions
So if I eliminate the thermostat all together (see some mention running a gutted t-stat) how much longer would it take the car to warm up on average?
Also, if the bypass gets blocked and I leave the t-stat installed but drill some holes in it, will that help the coolant to flow while the stat is still closed? or will holes not flow enough to do that?
I don't want hot spots in the engine, nor do I want to cavitate the pump
Do electric pumps require you to not run a t-stat for these reasons?
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Re: Drilling and tapping Indy SB intake for bypass hose
[Re: mshred]
#1546493
12/12/13 01:01 AM
12/12/13 01:01 AM
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Joined: Jan 2003
Posts: 6,266
Renton Washington
Triple Threat
master
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master
Joined: Jan 2003
Posts: 6,266
Renton Washington
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Thermostat ..... HA haven't ran one in probably 8 years. Stock pump or electric.
I agree, leave it blocked off, drill some holes in the Thermostat if you wish to circulate water.
-Dustin
67 Dart, 9 second, 392" G3 Hemi
68 Barracuda 340 F/SA
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Re: Drilling and tapping Indy SB intake for bypass hose
[Re: mshred]
#1546494
12/12/13 01:08 AM
12/12/13 01:08 AM
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Joined: Jun 2003
Posts: 52,972
Romeo MI
MR_P_BODY
Master
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Master
Joined: Jun 2003
Posts: 52,972
Romeo MI
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So if I eliminate the thermostat all together (see some mention running a gutted t-stat) how much longer would it take the car to warm up on average? Also, if the bypass gets blocked and I leave the t-stat installed but drill some holes in it, will that help the coolant to flow while the stat is still closed? or will holes not flow enough to do that? I don't want hot spots in the engine, nor do I want to cavitate the pump Do electric pumps require you to not run a t-stat for these reasons?
I run a stat with 6 1/8" holes in it... elec pumps
dont like to be dead heated... I dont run the by
pass on my Rampage but I also plan on a heater
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Re: Drilling and tapping Indy SB intake for bypass hose
[Re: Triple Threat]
#1546495
12/12/13 01:14 AM
12/12/13 01:14 AM
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Joined: Apr 2009
Posts: 3,415
Toronto
mshred
OP
master
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OP
master
Joined: Apr 2009
Posts: 3,415
Toronto
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Quote:
Thermostat ..... HA haven't ran one in probably 8 years. Stock pump or electric.
I agree, leave it blocked off, drill some holes in the Thermostat if you wish to circulate water.
Did you notice that it takes the car longer to warm up without one? Do you run a restrictor in its place, or nothing at all?
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Re: Drilling and tapping Indy SB intake for bypass hose
[Re: MR_P_BODY]
#1546496
12/12/13 01:15 AM
12/12/13 01:15 AM
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Joined: Apr 2009
Posts: 3,415
Toronto
mshred
OP
master
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OP
master
Joined: Apr 2009
Posts: 3,415
Toronto
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Quote:
So if I eliminate the thermostat all together (see some mention running a gutted t-stat) how much longer would it take the car to warm up on average?
Also, if the bypass gets blocked and I leave the t-stat installed but drill some holes in it, will that help the coolant to flow while the stat is still closed? or will holes not flow enough to do that?
I don't want hot spots in the engine, nor do I want to cavitate the pump
Do electric pumps require you to not run a t-stat for these reasons?
I run a stat with 6 1/8" holes in it... elec pumps
dont like to be dead heated... I dont run the by
pass on my Rampage but I also plan on a heater
What if I am ditching the heater setup totally? Will the stat with the holes drilled in it suffice, or will the pump still be dead headed technically?
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Re: Drilling and tapping Indy SB intake for bypass hose
[Re: Triple Threat]
#1546499
12/12/13 08:06 PM
12/12/13 08:06 PM
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Joined: Apr 2009
Posts: 3,415
Toronto
mshred
OP
master
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OP
master
Joined: Apr 2009
Posts: 3,415
Toronto
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Quote:
Quote:
Quote:
Thermostat ..... HA haven't ran one in probably 8 years. Stock pump or electric.
I agree, leave it blocked off, drill some holes in the Thermostat if you wish to circulate water.
Did you notice that it takes the car longer to warm up without one? Do you run a restrictor in its place, or nothing at all?
Yes it takes longer, this is only an issue if you live as close to the north pole as you do.
I ran nothing.
LOL I'm not much further north then you...your in washington, arent you?  
Maybe it's worth trying without anything in there at all?
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Re: Drilling and tapping Indy SB intake for bypass hose
[Re: MR_P_BODY]
#1546500
12/12/13 08:07 PM
12/12/13 08:07 PM
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Joined: Apr 2009
Posts: 3,415
Toronto
mshred
OP
master
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OP
master
Joined: Apr 2009
Posts: 3,415
Toronto
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Quote:
What if I am ditching the heater setup totally? Will the stat with the holes drilled in it suffice, or will the pump still be dead headed technically?
the holes are good enough to move some fluid but
still warm the engine fairly quick and not hurt the pump
Have you tried the drilled stat without any heater core? I just worry about creating hot spots in the motor...How much can those holes really flow is what I wonder
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