What did you do to your FL5 today?

[DmK]

The reason that I got the @COBB Tuning intake was because it is CARB compliant, and I wanted more air/power so I also got the Cobb jailbreak and Access port with custom tune by Brian @JST Performance

I am very pleased with both.

the custom tune is still an iterative work in progress, it is taking a long time because I keep forgetting (so good as is) to log and send Brian the logs he needs for the next iteration.

Highly recommended.

some more details here:

Makes me wonder, how does it effect temperature inside of inlet pipe.
My understanding, since COBB has a bigger MAF Housing it forces more air compression inside of factory inlet pipe, as a result, rise in a kinetic energy directly causes air temperature to increase, which can effect turbo energy output

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[zumbooruk]

Makes me wonder, how does it effect temperature inside of inlet pipe.
My understanding, since COBB has a bigger MAF Housing it forces more air compression inside of factory inlet pipe, as a result, rise in a kinetic energy directly causes air temperature to increase, which can effect turbo energy output

the larger MAF housing in the Cobb Redline does not force extra compression or raise temperature inside the stock inlet pipe

it reduces upstream pressure losses, and the velocity drops in the enlarged MAF section, which lowers frictional losses before the air reaches the turbo

the irreversible losses that would convert kinetic energy into heat are minimized by the velocity stack and straightener grid

although velocity does rise again in the factory diameter pipe, the overall result is higher absolute pressure at the compressor inlet than with the stock intake

Cobb has shared test data showing the airbox pressure stays closer to ambient which lets the turbo reach target boost with less wastegate duty, lower exhaust manifold pressure, and better efficiency

i.e. the intake flows more air with less restriction and helps the turbo work more easily rather than against added losses

in fluid dynamic terms, Bernoulli’s relation for steady flow shows that lower velocity in the large MAF section corresponds to higher static pressure there for the same mass flow

the smooth contraction that follows raises velocity and lowers static pressure, yet the total stagnation pressure delivered to the compressor remains higher because upstream losses have been reduced

for typical intake velocities the associated temperature changes are only a few degrees and do not meaningfully affect compressor inlet conditions


in short, the design improves turbo efficiency rather than creating additional work for it

https://www.cobbtuning.com/products...nda-civic-type-r-fl5-acura-integra-type-s-de5

 

[artsyfartsyFL5]

The reason that I got the @COBB Tuning intake was because it is CARB compliant, and I wanted more air/power so I also got the Cobb jailbreak and Access port with custom tune by Brian @JST Performance

I am very pleased with both.

the custom tune is still an iterative work in progress, it is taking a long time because I keep forgetting (so good as is) to log and send Brian the logs he needs for the next iteration.

Highly recommended.

some more details here:

Ironically, PRL's intake is now 50 state CARB legal in 50 states, but im glad to hear positive things about the Cobb, especially coming from Subarus.

 

[DmK]

the larger MAF housing in the Cobb Redline does not force extra compression or raise temperature inside the stock inlet pipe

it reduces upstream pressure losses, and the velocity drops in the enlarged MAF section, which lowers frictional losses before the air reaches the turbo

the irreversible losses that would convert kinetic energy into heat are minimized by the velocity stack and straightener grid

although velocity does rise again in the factory diameter pipe, the overall result is higher absolute pressure at the compressor inlet than with the stock intake

Cobb has shared test data showing the airbox pressure stays closer to ambient which lets the turbo reach target boost with less wastegate duty, lower exhaust manifold pressure, and better efficiency

i.e. the intake flows more air with less restriction and helps the turbo work more easily rather than against added losses

in fluid dynamic terms, Bernoulli’s relation for steady flow shows that lower velocity in the large MAF section corresponds to higher static pressure there for the same mass flow

the smooth contraction that follows raises velocity and lowers static pressure, yet the total stagnation pressure delivered to the compressor remains higher because upstream losses have been reduced

for typical intake velocities the associated temperature changes are only a few degrees and do not meaningfully affect compressor inlet conditions


in short, the design improves turbo efficiency rather than creating additional work for it

https://www.cobbtuning.com/products...nda-civic-type-r-fl5-acura-integra-type-s-de5

Very detailed answer, thank you!

 

[egxflash]

Ironically, PRL's intake is now 50 state CARB legal in 50 states, but im glad to hear positive things about the Cobb, especially coming from Subarus.

I just realized I never got the CARB sticker from them that I submitted for like 1-2 mos ago!

 

[MrBBQ]

I just realized I never got the CARB sticker from them that I submitted for like 1-2 mos ago!

I realized I don't have a CARB sticker from COBB either. Will have to request one.

 

[Mrjustin81]

Now I ought to be able to see anything backing up.

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