First a few caveats...

All impressions are from use on TRACK, not street driven.

No scientific double blind testing was done here

All comments are my own

The only device employed in this testing was my butt- that has 100's of laps in the configuration run on this track.

Ok, now that thats out of the way...

This past Saturday I had the Mini out at Motorsports Ranch again where we ran the 1.7 mile course CCW. As luck would have it in a previous session to mine a Corvette went off and sat still for to long. With the freshly mowed tall grass drying in the Texas sun it was not long before a grass fire started. My run groups session was scrubbed. The next time we gridded a Porsche 99X Turbo had a plastic T fitting in the coolant lines crack laying down antifreeze on the line in a long sweeper all the way to the entry of the fastest turn on track. Another missed session.

The promoters allowed my group to run a long session during lunch, about 35 min instead of 25. I noticed at the end of the session I was still able to spin the fronts when exiting a very slow tight left in 2nd. In all previous track session when using the DFIC I lost the lightup-ability in the corner after 4-5 laps. Later in the day we were given double stints to help make up for time lost earlier. I usually run 105 Octane fuel when on the track, purchased out of the drum from shop at the track. The facility recently opened, as in Saturday was the opening day, a Texaco station. They have a set of pumps selling VIP fuels. The only unleaded is 100 Octane, I wanted to try that out as it's almost $2 less expensive and much less of a hassle to buy. Typically I let the tank get a low as possible on the drive to the track and buy the 105 5gal at a time. With the gauge buried and the range showing 12 miles left I purchased 10 gal of 100 Octane and then ran the double session. On every lap from start to end I was capable of lighting up the tires at the same corner. My terminal speeds in all the straights remained consistent where before as the session ran I'd lose a few mph. In conclusion, for track use, the GP IC is a better unit then the M7 DFIC v1, in my opinion.

 

Great write up...

 

I always look forward to your write up Gnaster, I might even go to say they're now more exciting than looking at dyno plots

 

Very interesting, thanks for the writeup.

 

I remember reading somewhere else a while back that the DFIC became less efficient @ track speeds, but was better on the street. I guess this confirms it

 

Great write up, you've answered my question about the DFIC for track use compared to my GP intercooler.

 

Add your name to the growing list of the people who have tried and proven the DFIC's don't work. They sure look nice though . . .

 

Thats not what he is saying - merely that ON THE TRACK, his SOP indicates that the GP performed better than the DFIC ver1.

 

Well right after a 20 min track session at SOW, I was able to lay my hand on the cool side of my wifes Alta v.2 Intercooler. Try doing that with a DFIC. The GPs were really performing well also.

 

bumping this for relevant recent discussion. RSS = race team

 

The only relevance this discussion has is for people looking to compare or buy the DFIC V1.

M7 currently only sells the DFIC V2 which is the topic of the other thread, unless I missinderstand what other discussion your reffering to

 

Don't put words in my mouth. RSS didn't specify which they were referring to.

 

Easy there big boy

Your the one that chose to revive a thread thats almost a year old. What RSS are you talking about? A live feed? Does it concern the DFIC V1 or the DFIC 2?

Maybe you should "know" what your posting before you do. Some people might find this information misleading

 

It's hardly misleading...read for yourself.

 

Ok,

I've been reading, and the only thing I can come up with is that the DFIC V1 doesn't work for racing correct?

 

Rob,
if you want serious performance on the track.... neither V1 or V2 will get it done
it's fine for the street and mild driving but when pushed like we push them on the track it will not work as well as the stock intercooler

 

This thread was started form observations in late November of 2007, a normally cool time if year here in the Dallas TX area. I was comparing my findings on track with the DFIC V1, not the newer V2, I do not think V2 was available at the time.

Rss is not an RSS feed but a feeble attempt at shorthand for Rsstopper, see post #7 above.

Since the initial writeup I have had more time on track. The last being Memorial Day weekend. The track was a different one, but I have driven it before and can close my eyes while at my desk and describe every corner and picture the line. I know the track. Temps that weekend are typical Dallas Summer, mid 90's and humid. Being this was a PCA Club Race weekend those of us there for the HPDE portion were relegated to having sessions bumped and/or shortened to keep the Club Racing on schedule. I have no issue with that practice, not when it's a 3 day event that cost the same as a 2 day. To make up for missed sessions we were given an hour long session. We were free to come in and go back out as we pleased. I ran about 35 min before coming in to get some water and check the brake pads. During the entire 35 min session the power level did not waver. The car pulled just as strongly on the 15th lap as it did on the 1st, not including the out lap as that is a throwaway. Came in, shut the car down on the false grid, did not open the hood, it was out there under the sun as I drank a bottle or 2 of sweet, delicious, cold refreshing water. I may have spent 5 min in the pit before heading back out. Lit op the tires on the outlap without trying, power was still the same level. I could turn laps just as quick if not faster as I was getting better too.

So again, for my use on my car in it's current state of tune when on track the GP I/C works for me.

I have a Forge I/C in on the kitchen counter right now (yes I am single) and a track date on the 28 of this month. I'm thinking of taking it with me and swapping between sessions to see if there is any difference between the Forge and the GP I/C's

 

Thanks Gnatster for that , just as well PGT bumped this thread otherwise Gnatster might not off put finger to key

 

This I understand and have found to be true with the barbaric testing I've done myself

The problem I've been having lately is it seems that an "if its not good on the track, then its not good" attitude has been out there. As you know that belief is untrue, unfortunately everything seems to come back to how does it perform on the track.

I believe there are allot of end users of these products that buy them for their everyday drivers, for looks and some performance gain. At least I do... I know I've been taking things a bit personally lately, I had that revelation this morning reading this revived thread.

Thanks for the post Jan, I think it helps man

 

No problem Rob,
I think people get "performance" confused with "fun driving"
it has different meanings to people and hence the confusion
I guess everyone needs disclaimers in their sigs