Out of curiousity why does everyone use 2.5" on the crossover pipe
#101
TECH Addict
iTrader: (6)
Here is where we got the idea to change. They use 2" primary thick wall tubing.
http://www.full-race.com/store/turbo...-manifold.html
Edit: inside diameter was around 1.78", outside was 2.0"
http://www.full-race.com/store/turbo...-manifold.html
Edit: inside diameter was around 1.78", outside was 2.0"
Last edited by Sarg; 02-03-2013 at 04:09 PM.
#102
Here is where we got the idea to change. They use 2" primary thick wall tubing.
http://www.full-race.com/store/turbo...-manifold.html
Edit: inside diameter was around 1.78", outside was 2.0"
http://www.full-race.com/store/turbo...-manifold.html
Edit: inside diameter was around 1.78", outside was 2.0"
#104
Better yet, what do 1200-1300hp imports use for tube sizes?
#105
TECH Addict
iTrader: (6)
I have never built a 1200 hp import. We only tested the two combos. We were surprised to see the increase in spool up with the larger pipe size. We initially built it with the smaller size to try to promote more exhaust velocity but found that the subarus with their long exhaust tract seemed to like larger exhaust for whatever reason. This was a 400 awhp street car.
#106
How much would 2" crossover support? around 1000?
Obviously my power will be much less than that so I am thinking about 2" crossover for my street LT1...hell I am actually kicking around the idea of 1.5" header primaries. On my setup I will have to merge the two 2" pipes into a single 2.5" pipe into a t4 .96 ar t70 MasterPower turbo. Or should my merge be a single 2.25" pipe? The merge will be about a foot long with a 90.
two 2" pipes = 6.28 cross section
one 2.25 = 4" cross section
one 2.5 = 4.9 cross section
Looks like 2.5 is the better merge size? Comments?
#114
Dont take my advise, get maximum boost by corky bell and do some research.
Seems like a majority of v8 owners put retarded size pipes on their setups without ever testing or researching.
Some of my import friends make headers out of 1.25" schedule 20 pipes for a 400-500hp build.
Seems like a majority of v8 owners put retarded size pipes on their setups without ever testing or researching.
Some of my import friends make headers out of 1.25" schedule 20 pipes for a 400-500hp build.
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n2xlr8n66 (09-03-2021)
#119
Teching In
Hi Phil,
Oddly enough, I was going to finish my 2.5 cross over for my 5.3 single turbo. It is about 1/2 way done, but I'd rather get it right now than do it all over again to optomize it later. I am using an f-car manifold on the left and a log manifold on the right. The manifold has a piece of schedule 10 2 inch stainless which has an ID around 2.25. The log on the right is sc 10 2.5 inch which matches the T4 flange nicely when ovalled with a vice. That all being said, I grabbed my copy of Maximum Boost and was not able to find the math to determine the correct cross over size. There was a mention of mach numbers and flow in the intercooler section. I would like to understand the math behind this. I would greatly appreciate any help so that I can size this cross ove correctly.
Thanks
Mike
Oddly enough, I was going to finish my 2.5 cross over for my 5.3 single turbo. It is about 1/2 way done, but I'd rather get it right now than do it all over again to optomize it later. I am using an f-car manifold on the left and a log manifold on the right. The manifold has a piece of schedule 10 2 inch stainless which has an ID around 2.25. The log on the right is sc 10 2.5 inch which matches the T4 flange nicely when ovalled with a vice. That all being said, I grabbed my copy of Maximum Boost and was not able to find the math to determine the correct cross over size. There was a mention of mach numbers and flow in the intercooler section. I would like to understand the math behind this. I would greatly appreciate any help so that I can size this cross ove correctly.
Thanks
Mike
#120
Hi Phil,
Oddly enough, I was going to finish my 2.5 cross over for my 5.3 single turbo. It is about 1/2 way done, but I'd rather get it right now than do it all over again to optomize it later. I am using an f-car manifold on the left and a log manifold on the right. The manifold has a piece of schedule 10 2 inch stainless which has an ID around 2.25. The log on the right is sc 10 2.5 inch which matches the T4 flange nicely when ovalled with a vice. That all being said, I grabbed my copy of Maximum Boost and was not able to find the math to determine the correct cross over size. There was a mention of mach numbers and flow in the intercooler section. I would like to understand the math behind this. I would greatly appreciate any help so that I can size this cross ove correctly.
Thanks
Mike
Oddly enough, I was going to finish my 2.5 cross over for my 5.3 single turbo. It is about 1/2 way done, but I'd rather get it right now than do it all over again to optomize it later. I am using an f-car manifold on the left and a log manifold on the right. The manifold has a piece of schedule 10 2 inch stainless which has an ID around 2.25. The log on the right is sc 10 2.5 inch which matches the T4 flange nicely when ovalled with a vice. That all being said, I grabbed my copy of Maximum Boost and was not able to find the math to determine the correct cross over size. There was a mention of mach numbers and flow in the intercooler section. I would like to understand the math behind this. I would greatly appreciate any help so that I can size this cross ove correctly.
Thanks
Mike