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With Mishimoto also developing VR30 Intercoolers (ICs), I recently stopped by DropBear's FB page to see what progress has been made on their IC development.
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It looks like they are now in the low-production stage. Has anyone considered this upgrade?

Seems to be a good mod for those modded, high-boost Q's in Florida & Texas, considering the heat & humidity. I don't have a good feel for the level of (+) performance impact when dropping 13 deg F on the Intake Charge, including for those of us running in not-so-hot & humid conditions.

$2100 for the kit w/o BOVs.

Here's a graph and other important #'s:


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Discuss.
 

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Just driving around in north Texas, not doing any pulls, my charge air is about 20* above ambient temperatures with stock HX. Will have to see how much of a difference an after market HX makes before I’d consider this. But honestly, I don’t see it being for me unless I wanted to chase that legendary 1000hp mark, which I know has been achieved with the stock intercoolers. Still, options are always awesome!
 

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Well, in Utah, our winters can be brutal, but so can our summers, I will be considering this upgrade, but only after fueling upgrades. I have a heat exchanger already
 

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It will be interesting to see how Mishimoto options stack up, considering that they are single pass compared to DB triple pass. BoostinMotion talks with the owner of DB in one of his hour+ videos on VR30 parts from DB
 
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They look like nice pieces for sure. I know my charge air temp is usually about +20 over Intake temp even if the intercooler coolant temp is below intake temp. Would be interesting to see where these keep charge air temp at.
 

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I have no idea if this is a legitimate way of checking the HP increase from a 13^ intake temp drop but, using this calculator, if I keep 3 of the 4 inputs the same, and lower the air temp from 100^ to 87^, the relative HP raises exactly 1%. 1% of 450 HP is 4.5 HP.




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2017 infiniti Q50 AWD
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I have no idea if this is a legitimate way of checking the HP increase from a 13^ intake temp drop but, using this calculator, if I keep 3 of the 4 inputs the same, and lower the air temp from 100^ to 87^, the relative HP raises exactly 1%. 1% of 450 HP is 4.5 HP.




View attachment 103592
HP2 / HP1 = square root of (T1 / T2)

The horsepower at temperature 2 divided by the horsepower at temperature 1 is equal to the square root of the result of temperature 1 divided by temperature 2.


Based on the graph above we will take 115f vs 102f
we will assume a nice healthy 500whp at 115f to make the maths easier. This would result in 505.75hp at 102f or a 5.75hp increase for 13f decrease.

the HP increase is a percentage change at a given temp change, meaning
115 to 102f is a 1.0115 times increase so a 250hp car would be 252.875hp or a 2.875hp increase half of a 500hp car.

now to complicate things more it is not a steady number meaning it is not a 1.0115 times increase per every 13f decrease

Going from 115f to 89f is a 1.0234 times increase in hp so 500hp to 511.7hp or 11.7hp for 26f or 5.85hp avg per 13f but 5.75hp for the 1st 13f and 5.95hp for the 2nd 13f

now do a 39f drop 115f to 76f is a 1.0357 times hp increase or 500hp to 517.87hp or 5.956avg per 13f but 5.75hp for 1st 13f, 5.95hp for 2nd 13f and 6.17hp per 3rd 13f.

now to complicate things more as you should already be able to start to tell the larger percentage drop in temp has the larger increase in benefit and vice versa.

meaning 115f to 102f was 5.75h
89f to 76f was a 6.17hp increase.

now let’s get real crazy!
and do 250f drop to 211f a 39f drop.
would be a 1.02864 times increase or
500hp to 514.32hp. Or 14.32hp for 39f drop.
Referencing above for comparison
115f to 76f was a 1.0357 times increase or
500hp to 517.87hp or 17.87hp for 39f drop.

300f to 200f is 1.073 times or 536.2hp
200f to 100f is 1.0856 times or 542.8hp
300f to 100f is 1.165 times or 582.5hp
 

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HP2 / HP1 = square root of (T1 / T2)

The horsepower at temperature 2 divided by the horsepower at temperature 1 is equal to the square root of the result of temperature 1 divided by temperature 2.


Based on the graph above we will take 115f vs 102f
we will assume a nice healthy 500whp at 115f to make the maths easier. This would result in 505.75hp at 102f or a 5.75hp increase for 13f decrease.

the HP increase is a percentage change at a given temp change, meaning
115 to 102f is a 1.0115 times increase so a 250hp car would be 252.875hp or a 2.875hp increase half of a 500hp car.

now to complicate things more it is not a steady number meaning it is not a 1.0115 times increase per every 13f decrease

Going from 115f to 89f is a 1.0234 times increase in hp so 500hp to 511.7hp or 11.7hp for 26f or 5.85hp avg per 13f but 5.75hp for the 1st 13f and 5.95hp for the 2nd 13f

now do a 39f drop 115f to 76f is a 1.0357 times hp increase or 500hp to 517.87hp or 5.956avg per 13f but 5.75hp for 1st 13f, 5.95hp for 2nd 13f and 6.17hp per 3rd 13f.

now to complicate things more as you should already be able to start to tell the larger percentage drop in temp has the larger increase in benefit and vice versa.

meaning 115f to 102f was 5.75h
89f to 76f was a 6.17hp increase.

now let’s get real crazy!
and do 250f drop to 211f a 39f drop.
would be a 1.02864 times increase or
500hp to 514.32hp. Or 14.32hp for 39f drop.
Referencing above for comparison
115f to 76f was a 1.0357 times increase or
500hp to 517.87hp or 17.87hp for 39f drop.

300f to 200f is 1.073 times or 536.2hp
200f to 100f is 1.0856 times or 542.8hp
300f to 100f is 1.165 times or 582.5hp
Bravo. Very nice. 👏
 
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imo, there are better solutions available for less than $2100+. craftsmanship is top notch and theyre beautiful, no arguing that. DB claims "20+ degrees on the top end", presumably indicating 1/4 mile performance. no doubt the parts work better than stock.
 

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imo, there are better solutions available for less than $2100+. craftsmanship is top notch and theyre beautiful, no arguing that. DB claims "20+ degrees on the top end", presumably indicating 1/4 mile performance. no doubt the parts work better than stock.
Most benefit would be for track use. Maybe the R&D and intent for these is really for the Z market. But people with deep pockets, or the few people who track the Qs can benefit as well.
 

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oh I want them alright, and 2100 sounds good. but in all honesty, a 1500. meth kit has gotten me through a moderately nasty fla summer just fine. yea i run a little rich but injector duty was never pulled. as feel or z1scan tool has shown anyway.
 

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I love that movie. God knows you wouldn’t dare make that movie right now. Just like pretty much every Mel Brooks movie. No way you could make it now. People have forgotten how to laugh at each other and more importantly, at themselves.
 
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