[Mit_Boost]

Originally Posted by Tiago@VRSF

Again, you're mis-informed. The race core is 11" tall. Our race intercooler core is larger than the Garret you're referencing and it is as dense. It will outperform his intercooler without an issue due to the overall volume and I guarantee you it will cost less when it's all said and done.

Lower cost is definitely a VRSF hallmark, but I feel bad for Myrder who paid for a 7" heatsink. Do you have any data that supports your claims?

If you google "ad engineering fmic iat data" and look for the link to Spool---Street, someone compared the VRSF 7" against the AD Engineering 650 HP (7.75" thick x 6.5" stepped back) with a Doc Race 6266... The VRSF was run in more favorable conditions and still saw an IAT increase; almost 20* increase with stock twins. Meanwhile, the AD saw no increase.

Not sure of the setup, but attached Excel screenshot attached Excel shows 50* IAT increase over a pull (Column G) with the VRSF 7".

[Tiago@VRSF]

And you're ignoring every log you've seen on the 7" HD and the 7.5" race? Here's logs of the VRSF 7" HD core. This is the smaller core. 2-4 gear pull, 91 degree start, 100 degree finish. 9 degree rise over 3 gears. Keep in mind the 7" HD is $599.99. It's less expensive than any comparable 6" or 7" intercooler and it's outperformed all of them. The 7.5" race intercooler is $719.99 and there's nothing available that can come close to the performance for less than $1000.

We have yet to see an intercooler perform this well at this volume.



Here's an independent video review of the 7" HD:

Customer review of 7.5" race: http://www.1addicts.com/forums/showthread.php?t=1313664

[Tiago@VRSF]

Originally Posted by Myrder

I have the 7" VRSF intercooler, must be street as the HD wasn't out at the time. Located in Phx AZ I don't even floor it during the summer as my IAT are about 10f above ambient at all times. so when its 110f out, my IATs are already at 120f. When I did 2 different 1/2 mile events with temps at 80f I was having IAT issues. So I would definitely not recommend a 7" if you are going to be in temps over 80f.

this is just FBO stock turbos.

110 degree ambient temps isn't ideal for any intercooler. Driving at 10f above ambient is normal depending on the conditions of driving. The fact that you're starting at 110 and pushing the car that far in a half mile event is a good indicator that you need a larger intercooler.

Our 7.5" race intercooler would do wonders if you're regularly participating in half mile events.

[Koolsilver]

I recently installed the 7inch HD from VRSF. I'm full bolt ons in Sacramento and we've been seeing 100+ temperature everyday for too long. I haven't had much opportunity to do any hard pulls yet but I can say that when cruising at ~60MPH I usually see a +11 degree over ambient. FWIW I did a 2nd to 3rd pull and saw very little increase but this was only one quick burst so take that for what it is.

[Myrder]

Originally Posted by Tiago@VRSF

110 degree ambient temps isn't ideal for any intercooler. Driving at 10f above ambient is normal depending on the conditions of driving. The fact that you're starting at 110 and pushing the car that far in a half mile event is a good indicator that you need a larger intercooler.

Our 7.5" race intercooler would do wonders if you're regularly participating in half mile events.

I wasn't racing in 110f temps, it was 80f. There are multiple logs on another forum, maybe this one from my event. I have stock turbos and the 7" non HD isnt cutting it.


Mit_Boost Yea i posted logs on N54tech a while back from my 1/2 mile days.

[Mit_Boost]

Originally Posted by Myrder

Yea i posted logs on N54tech a while back from my 1/2 mile days.

Sorry about that, was directed at Tiago. Disappointing that he's telling you that you need to upgrade from the 7" to the 7.5" to keep IATs under control with stock turbos. Not sure the 7.5" would be effective on a ST setup and another 200-300 WHP in the same conditions

[Bimmer 808]

my independent review. taking it to wanna-go-fast in VA next week for more logs on upgraded twins.

http://www.e90post.com/forums/showthread.php?t=1360590

[Antoans4]

Originally Posted by LMB335IS

I can personally vouch for the VRSF 7" HD IC. I also have a FBO 2013 335is and am one of the guys that BQ Tuning referred to as beating the crap out of it in FL heat and 1/2 mile events. This summer I routinely log in the middle of the day in a ambient of 85°- 95°F with the heat index over 100° and will only see a 10°- 15° rise in a full three gear 3rd-5th blast. Starting IAT is 10°-15° over ambient and this is repeatable over a three log session with a 3-4 minute turnaround time between logs.

I do also 3 logs, but back to back all off them, i finish one log brake and then start the next log, brake again and start the last log, i have the VRSF 7, NOT the HD, i'm also in the hot Florida weather, wonder if Dimitri can compare your IAT's against mines

[BQ Tuning]

Originally Posted by Antoans4

I do also 3 logs, but back to back all off them, i finish one log brake and then start the next log, brake again and start the last log, i have the VRSF 7, NOT the HD, i'm also in the hot Florida weather, wonder if Dimitri can compare your IAT's against mines

Sure, I used his IAT log with yours comparing the 3rd logs with each other.

LMB335IS did his logs in the day time with 97°f ambient temps and higher DA. He starting from 3rd gear and ended in 6th gear with IAT @ 126°f




You also started from 3rd gear in about 94°f ambient temps at night with lower DA and ended your run only in 4th gear @ 126°f on the non HD 7"



There is a night and day performance difference between the 7" and the 7" HD . Same model cars, same tuner, same geography location, both cars making similar power, same fuel.

[dublin14]

Originally Posted by Tiago@VRSF

So you recommended a 5" because you thought it was the same size intercooler turb0mik3 has but neglected to realize that it's double the height of every intercooler you recommended and when you're called out for spreading mis-information you take shots?

If you're worried about the quality of our HD and race core I'd contact Motiv, PTF, VTT and about a half dozen other shops and tuners who have praised both the HD and race core on builds ranging from 450-870whp.

Not to hijack here but I will be ordering a IC soon but was told that VRSF are not near as good fitment vs say ER or Wagner to install. I like your prices in comparison being in Canada we get killed by our dollar vs US. So is there any truth to what I was told? Not being a dick just wanna know before I spend $700.

[J. Dub]

Interesting findings in here. Thanks all for posting. Gives me stuff to think on.

[McLovin335i]

Just curious but are these just quarter mile runs we are measuring? I did a run for about a mile with full bolt on and 5" ETS intercooler and my IAT's measured about 147. It was a 93 degree day and I'm running a 30% ethanol blend with FBO. Normally, my IAT's are 10 degrees higher than ambient while driving.

[LMB335IS]

Originally Posted by McLovin335i

Just curious but are these just quarter mile runs we are measuring? I did a run for about a mile with full bolt on and 5" ETS intercooler and my IAT's measured about 147. It was a 93 degree day and I'm running a 30% ethanol blend with FBO. Normally, my IAT's are 10 degrees higher than ambient while driving.

Are you talking about going WOT for a mile? I think you'll be hard pressed to find any logs at all of that. Full mile events are few and far between.

Here's the beginning and end #'s of my last 1/2 mile run at WannagoFast in Clayton GA in May. Ambient was around 80*

[Banana Clipper]

WTF am I doing wrong here? 7" VRSF ambient temps around 75*



Just incase anyone wants to see the full log - http://datazap.me/u/banana-clipper/r...og=0&data=3-22

[LMB335IS]

Originally Posted by Banana Clipper

WTF am I doing wrong here? 7" VRSF ambient temps around 75*

Just incase anyone wants to see the full log - http://datazap.me/u/banana-clipper/r...og=0&data=3-22

This is the same event 9 months earlier with close to the same ambient temp on my old VRSF 7". The new HD really is great bang for the buck.

[RSL]

Originally Posted by LMB335IS

This is the same event 9 months earlier with close to the same ambient temp on my old VRSF 7". The new HD really is great bang for the buck.

That's a pretty damn big improvement. Not a fan VRSF by any means, but I'd almost dump the money to test an HD here in Texas.

[Tiago@VRSF]

Originally Posted by dublin14

Not to hijack here but I will be ordering a IC soon but was told that VRSF are not near as good fitment vs say ER or Wagner to install. I like your prices in comparison being in Canada we get killed by our dollar vs US. So is there any truth to what I was told? Not being a dick just wanna know before I spend $700.

The 5" stepped and 7" intercoolers fit just as well as any other intercooler available. The 7" HD is going to be the best performing 7" you'll find on the market and it fits without an issue.

[1BADM3]

nice

[Jeff@TopGearSolutions]

Originally Posted by Banana Clipper

WTF am I doing wrong here? 7" VRSF ambient temps around 75*



Just incase anyone wants to see the full log - http://datazap.me/u/banana-clipper/r...og=0&data=3-22

You need HD

You realize you are running your turbo's very hard and they are blowing super hot at the boost levels your run?

You are at 19 PSI at 6000 RPM in 4th gear. Those turbo's are probably glowing. If you want to run your boost that high, you need the appropriate intercooler.

The regular VRSF 7" is good for typical FBO on typical boost pressures. Most guys will peak ~18 PSI on a typical stage 2+ FMIC Map and taper to like 15 PSI (or less) by red line.

In comparison, my ETS 5" (which is in essence an HD core) runs fairly well with appropriate boost for the mods and conditions.

http://datazap.me/u/jpags529/log-149...0&data=3-15-23

I peak at 19 PSI in 3rd, taper to 14.9 at 6200 RPM. IAT went from about 82-93F in 3rd gear pull.

Jumping into 4th, 18 PSI tapering to 16 PSI by 6000 RPM. IAT 93-111 and that is on a 70F day on a 5" ETS and the car was heat soaked previously.

[J. Dub]

Originally Posted by Jeff@TopGearSolutions

In comparison, my ETS 5" (which is in essence an HD core)

To confirm, your ETS 5" is in essence a 7" VRSF HD?

[Tiago@VRSF]

An ETS 7" is comparable to a VRSF 7" HD. Our HD fin pack is denser than ETS's standard fin pack. The ETS 5" is closer to our 7" street.

[mike@x-ph.com]

Originally Posted by J. Dub

To confirm, your ETS 5" is in essence a 7" VRSF HD?

He is talking about the fin density not the actual intercooler ... the 7" VRSF HD will easily outperform the ETS 5"