I just installed my MP 60mm T/B and I had to replace my coupling because it wouldn't fit. My intercooler piping is 2" (50mm) and now my T/B is at 60mm would that be a restriction? Should I have part of my pipe go to 60mm before it hits the T/B? THanks
Alvin

96 RST

Star turbo kit /Starion FMIC / GReddy Type-S BOV / Missing Link / Custom APEXi- GReddy 2.5" exhaust / 55mm ARD TB/ Nology wires / Joe P BC / Southland Dual Friction clutch

To be able to take the most advantage of the larger inlet, you would want a gradual increase in diameter to match the TB.


boosted 420a and ej2o..(my 2liter v8 eaters)

Originally posted by Semperboost
I just installed my MP 60mm T/B and I had to replace my coupling because it wouldn't fit. My intercooler piping is 2" (50mm) and now my T/B is at 60mm would that be a restriction? Should I have part of my pipe go to 60mm before it hits the T/B?

HRC does that with its piping. It starts out at about 2" from compressor to I/C. After the I/C however, it's all 2.25".

Just as ^^ post, you'd benefit more from the 60mm with a bigger i/c outlet to the t/b pipe. Just an example, from the turbo to the i/c inlet, mine is 2.25"; i/c outlet to throttle body, is 2.50"

When I had my piping done they chopped off the Star Stage I pipe right below the battery, near the ECU so I have a coupling attaching it to the rest of the piping. Do you think I should make that elbow 2.25 (which is about a foot long) instead of leaving it 2" and getting a larger coupling for the T/B? thanks
Alvin

96 RST

Star turbo kit /Starion FMIC / GReddy Type-S BOV / Missing Link / Custom APEXi- GReddy 2.5" exhaust / 55mm ARD TB/ Nology wires / Joe P BC / Southland Dual Friction clutch

bigger = better

one of the reasons why the HRC pipes get larger is for the same reason that idealy, exhaust systems get progressively larger as they go back. as gasses cool off they expand and need a larger pipe to maintain the same veolcity.

after intake air goes through the intercooler it's definately a lot colder, so the outlet pipe needs to be larger to keep the veolcity up. this is along the same philosophy of getting a 3" cat-back after a catalytic converter/downpipe which smaller than 3".

Originally posted by ner947
one of the reasons why the HRC pipes get larger is for the same reason that idealy, exhaust systems get progressively larger as they go back. as gasses cool off they expand and need a larger pipe to maintain the same veolcity. after intake air goes through the intercooler it's definately a lot colder, so the outlet pipe needs to be larger to keep the veolcity up. this is along the same philosophy of getting a 3" cat-back after a catalytic converter/downpipe which smaller than 3".

actually, as pipes get larger, the velocity decreases, however there is less friction with parger pipes. when you take a pump and put a pipe on it, depending on the pipe diam the velocity could be extremely high, (in the case of a 1/2 or smaller pipe) or really slow (3' or bigger) the larger pipe helps as there is less friction for the air moving, also, air goes from high to low pressure. increas in pipe will help air move along some, while reducing friction.