Race Precision Intercooler Installed

335i black/red · 05-20-2008, 06:01 PM

I've just installed the RP Intercooler, which claims dynos of 26 extra hp. Unfortunately I haven't felt any power increase actually i've just felt lag at 4k RPM. I have felt more power when I installed the Gruppe M intake which is known to add more power. The temprature outside is 80 degrees.
Now after a couple of runs my oil temp is 3/4 of the way between the 210 slot and the 300 mark towards the 300, which is the same as when I run stock. The only difference is that close to 110mph as i'm speeding it reduces one or two marks and as soon as I slow down it goes up a notch.

I heard somewhere that the oil temp doesn't exceed the middle mark on intercooled cars. Is this true, is there something wrong with my intercooler?

Can some of you big boys with hands on experience whether w RPI or others chime in and help me out.

N.B. There are no dynos here so I can't test it out except when I race some of the other cars to see the difference.

e90AW335i · 05-20-2008, 06:02 PM

Do you have a tune?

335i black/red · 05-20-2008, 06:07 PM

Quote:

Originally Posted by e90AW335i

Do you have a tune?

Procede V2, Gruppe M intake, stock exhuast

e90AW335i · 05-20-2008, 06:08 PM

Quote:

Originally Posted by 335i black/red

Procede V2, Gruppe M intake, stock exhuast

Maybe shiv will chime in and help you...

Craig@SupremePower · 05-20-2008, 06:10 PM

Give RPI a call and speak with a tech... 562-630-5966

rooster3.0 · 05-20-2008, 06:15 PM

Intercooler shoudn't lower your oil temp, should it? As for more HP, I'd think you'd need a map to really take advantage of it.

335i black/red · 05-20-2008, 06:22 PM

Quote:

Originally Posted by rooster3.0

Intercooler shoudn't lower your oil temp, should it? As for more HP, I'd think you'd need a map to really take advantage of it.

Thats my question precisely.

I do have a V2 procede map

Hunter399 · 05-20-2008, 07:50 PM

Intercoolers dont lower oil temps

rooster3.0 · 05-20-2008, 09:21 PM

Quote:

Originally Posted by 335i black/red

Thats my question precisely.

I do have a V2 procede map

Yes, but that map isn't optimized for an upgraded intercooler. V3 should allow you to take advantage of the IC.

NYCGarbagePrince · 05-20-2008, 09:38 PM

I/C don't directly affect oil temps. However, your car will run cooler therefore indirectly effecting oil temps.

Lane · 05-20-2008, 10:46 PM

Quote:

Originally Posted by NYCGarbagePrince

I/C don't directly affect oil temps. However, your car will run cooler therefore indirectly effecting oil temps.

why does it run cooler? The more oxygen, the more combustion.

RPIpower · 05-21-2008, 12:42 PM

Make sure the intercooler is installed correctly. You do NOT need a custom tune for the intercooler to work or do its job. The purpose of the intercooler is to cool charge air temperatures and there is absolutely no way the stock cooler is more efficient.

- check o-rings
- check c-clips
- check to make sure that your tune can adapt to it like the stock tunes can.

once again, YOU DO NOT NEED A TUNE TO BENEFIT FROM THE INTERCOOLER.

pdjafari · 05-21-2008, 12:46 PM

A car will ALWAYS benefit from colder charge air temperatures, why do some people on the forum believe you have to have a 'tune' in order to take full advantage of an IC???

Malek@MRF · 05-21-2008, 12:47 PM

Quote:

Originally Posted by rooster3.0

Intercooler shoudn't lower your oil temp, should it? As for more HP, I'd think you'd need a map to really take advantage of it.

Intercooler has NOTHING to do with oil temp.

Yes cooler air means a cooler charge and more efficient burn, but it is not significant enough to dictate hotter or colder oil temps. NO WAY.

RPIpower · 05-21-2008, 01:00 PM

Quote:

Originally Posted by pdjafari

A car will ALWAYS benefit from colder charge air temperatures, why do some people on the forum believe you have to have a 'tune' in order to take full advantage of an IC???

Quote:

Originally Posted by Malekreza11

Intercooler has NOTHING to do with oil temp.

Yes cooler air means a cooler charge and more efficient burn, but it is not significant enough to dictate hotter or colder oil temps. NO WAY.

THANK YOU. Anytime you go from 46% to 84% thermal efficiency, you are going to benefit. The ONLY time your oil temps might be affected is if you have an oversize intercooler that is blocking your oil cooler. Then, you might have higher oil temps.

tomtom · 05-21-2008, 01:40 PM

it seems like the IC's larger surface are is blocked by the bumper anyways...
size isn't everything in an IC.

Lane · 05-21-2008, 01:45 PM

Quote:

Originally Posted by pdjafari

A car will ALWAYS benefit from colder charge air temperatures, why do some people on the forum believe you have to have a 'tune' in order to take full advantage of an IC???

Because everyone knows the colder temps are accounted for without a tune, but perhaps you could explain how the lesser IC pressure drop can be taken full advantage of without a tune?

RPIpower · 05-21-2008, 01:49 PM

Quote:

Originally Posted by tomtom

it seems like the IC's larger surface are is blocked by the bumper anyways...
size isn't everything in an IC.

It you really take a good look at our design its only 1 extra row and does not sit much lower than the stock one. The thickness of the core is increased so its still getting the same airflow as the stock one. We said from the beginning, its not about size, its about efficiency.

Quote:

Originally Posted by Lane

Because everyone knows the colder temps are accounted for without a tune, but perhaps you could explain how the lesser IC pressure drop can be taken full advantage of without a tune?

Double the efficiency with half psi of pressure drop, you dont need to retune. The maps are laid out and the ecu allows a certain amount of boost and timing depending on tps%, rpm, coolant temp, oil temp and IATs. These ECUs are not dummies and will learn/adjust for it. Our intercooler has a smaller width than the stock one to offset what would have been a significant pressure drop.

Lane · 05-21-2008, 01:51 PM

Quote:

Originally Posted by tomtom

it seems like the IC's larger surface are is blocked by the bumper anyways...
size isn't everything in an IC.

The stock bumper opening flows more than what gets through the RPI IC,. So all the added frontal area benefits the IC. The tiny frontal area of the stock IC is the bottleneck in it.

tomtom · 05-21-2008, 02:25 PM

so most of the hp gains are from the decrease in pressure drop? some were saying that they were boosting less but that wouldn't explain the increase in HP of 15-25rwhp.

RPIpower · 05-21-2008, 03:59 PM

Quote:

Originally Posted by tomtom

so most of the hp gains are from the decrease in pressure drop? some were saying that they were boosting less but that wouldn't explain the increase in HP of 15-25rwhp.

10 degree difference in IAT is about 1% hp increase.

tomtom · 05-21-2008, 05:08 PM

Quote:

Originally Posted by RPIpower

10 degree difference in IAT is about 1% hp increase.

1% of 350 rwhp = 3.5 rwhp
where does the other 15-20 hp gain come from?

05-20-2008, 06:01 PM	#1
335i black/red Private 16 Rep 94 Posts Drives: Da Twin Turbo Coupe Join Date: May 2007 Location: AZ iTrader: (0)	Race Precision Intercooler Installed I've just installed the RP Intercooler, which claims dynos of 26 extra hp. Unfortunately I haven't felt any power increase actually i've just felt lag at 4k RPM. I have felt more power when I installed the Gruppe M intake which is known to add more power. The temprature outside is 80 degrees. Now after a couple of runs my oil temp is 3/4 of the way between the 210 slot and the 300 mark towards the 300, which is the same as when I run stock. The only difference is that close to 110mph as i'm speeding it reduces one or two marks and as soon as I slow down it goes up a notch. I heard somewhere that the oil temp doesn't exceed the middle mark on intercooled cars. Is this true, is there something wrong with my intercooler? Can some of you big boys with hands on experience whether w RPI or others chime in and help me out. N.B. There are no dynos here so I can't test it out except when I race some of the other cars to see the difference. Last edited by 335i black/red; 05-20-2008 at 06:31 PM..
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05-20-2008, 06:02 PM	#2
e90AW335i Major General 138 Rep 6,608 Posts Drives: e90 335i Join Date: Sep 2007 Location: ...... iTrader: (4)	Do you have a tune?
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05-20-2008, 06:10 PM	#5
Craig@SupremePower G.O.A.T.! 1002 Rep 74,998 Posts Drives: '18 GMC Yukon XL Join Date: Mar 2008 Location: New Jersey iTrader: (14)	Give RPI a call and speak with a tech... 562-630-5966
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05-20-2008, 06:15 PM	#6
rooster3.0 Major 27 Rep 1,306 Posts Drives: E92 335i Join Date: Nov 2006 Location: Jersey iTrader: (4)	Intercooler shoudn't lower your oil temp, should it? As for more HP, I'd think you'd need a map to really take advantage of it.
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05-20-2008, 07:50 PM	#8
Hunter399 Major General 325 Rep 8,091 Posts Drives: F90M5 Join Date: Apr 2005 Location: Houston, TX iTrader: (33)	Intercoolers dont lower oil temps
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05-20-2008, 09:38 PM	#10
NYCGarbagePrince Major 248 Rep 1,435 Posts Drives: X6 50i Join Date: Aug 2007 Location: NYC iTrader: (0)	I/C don't directly affect oil temps. However, your car will run cooler therefore indirectly effecting oil temps.
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05-21-2008, 12:42 PM	#12
RPIpower Captain 49 Rep 857 Posts Drives: F97 X3M, G80 M3 Join Date: Aug 2007 Location: PA iTrader: (0)	Make sure the intercooler is installed correctly. You do NOT need a custom tune for the intercooler to work or do its job. The purpose of the intercooler is to cool charge air temperatures and there is absolutely no way the stock cooler is more efficient. - check o-rings - check c-clips - check to make sure that your tune can adapt to it like the stock tunes can. once again, YOU DO NOT NEED A TUNE TO BENEFIT FROM THE INTERCOOLER.
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05-21-2008, 12:46 PM	#13
pdjafari Colonel 153 Rep 2,472 Posts Drives: G80 M3C Join Date: Oct 2007 Location: Earth iTrader: (5)	A car will ALWAYS benefit from colder charge air temperatures, why do some people on the forum believe you have to have a 'tune' in order to take full advantage of an IC???
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05-21-2008, 01:40 PM	#16
tomtom Captain 54 Rep 986 Posts Drives: e92 335i Join Date: Jan 2008 Location: ontario iTrader: (4)	it seems like the IC's larger surface are is blocked by the bumper anyways... size isn't everything in an IC.
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05-21-2008, 02:25 PM	#20
tomtom Captain 54 Rep 986 Posts Drives: e92 335i Join Date: Jan 2008 Location: ontario iTrader: (4)	so most of the hp gains are from the decrease in pressure drop? some were saying that they were boosting less but that wouldn't explain the increase in HP of 15-25rwhp.
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