At what point do you need an Opies bypass?
11-11-2008 | 08:38 AM
#1
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Joined: Jun 2006
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From: Jacksonville, NC
At what point do you need an Opies bypass?
Mornin, DTR...
I was just wondering, when do you need a bypass? It's on my list of things to get, and probably next, but when should you get it? First few mods? Do you actually need it at a low HP?
TIA!!!
Mad...
I was just wondering, when do you need a bypass? It's on my list of things to get, and probably next, but when should you get it? First few mods? Do you actually need it at a low HP?
TIA!!!
Mad...
11-11-2008 | 09:00 AM
#2
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I am sure there are more knowledge out there than I, but my personal opinion is you need it when
1. You exceed 700 hp
2. You install twins of any size
3. Your total boost starts exceeding 60 psi
4. You run more than 3500 rpm.
It seems logical that blown freeze plugs would be directed related to rpm, with the water pump spinning faster, but what we are seeing now is that headgaskets are popping with high air flow conditions (twins) I am not sure how decompressing the water system keeps from blowing headgaskets related to cylinder pressure but it seems related, not proven yet though. Hopefully, some more knowledgeable people will post on this thread, as hp goes up we keep finding more weak links.
1. You exceed 700 hp
2. You install twins of any size
3. Your total boost starts exceeding 60 psi
4. You run more than 3500 rpm.
It seems logical that blown freeze plugs would be directed related to rpm, with the water pump spinning faster, but what we are seeing now is that headgaskets are popping with high air flow conditions (twins) I am not sure how decompressing the water system keeps from blowing headgaskets related to cylinder pressure but it seems related, not proven yet though. Hopefully, some more knowledgeable people will post on this thread, as hp goes up we keep finding more weak links.
11-11-2008 | 10:05 AM
#3
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From: Boise, Idaho
I would agree with those same recomendations...and add one more.
You need Opie's bypass when your head lifts every run at 800 hp and pressurizes your coolant system to the point 1-1.5 gallons exits your radiator into your overflow bottle in 10 seconds....
lol
You need Opie's bypass when your head lifts every run at 800 hp and pressurizes your coolant system to the point 1-1.5 gallons exits your radiator into your overflow bottle in 10 seconds....
lol
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11-11-2008 | 11:35 AM
#8
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From: Molalla, Oregon
SourceAutomotive has them. www.sourceautomotive.biz
11-11-2008 | 11:46 AM
#9
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From: Missouri
Ok I have be thinking about this for a while now. And my ? is why does the valve need to be temp Sensitive valve why not just use a presure relief valve? I mean its not like the valve will be subject to constant flow of coolant. What i mean by that is it would take longer and still probley never be accurate for the coolant temp to trigger the valve to open.
11-11-2008 | 02:41 PM
#14
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Ok I have be thinking about this for a while now. And my ? is why does the valve need to be temp Sensitive valve why not just use a presure relief valve? I mean its not like the valve will be subject to constant flow of coolant. What i mean by that is it would take longer and still probley never be accurate for the coolant temp to trigger the valve to open.
11-11-2008 | 03:37 PM
#15
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From: Georgia... Iowa Bound
On that note it's my next mod.