VCP Air to Water Intercooler kit

[Frank818]

I was on the dyno today with an 818 with my AWIC on it and it works awesome! It was hot here today, 94°F and after 20 pulls on the dyno, the manifold air temp went up from 94 to 102°. That's pull after pull after pull. The most temp increase during any single run was 1°.

Not surprised at all! Wayne have you ever tried different HEs on the same setup, to see which one was most efficient? Thin large frontal vs thick small frontal, as example.

[Wayne Presley]

This motor made 364 RWHP and 380 TQ

[Wayne Presley]

Not surprised at all! Wayne have you ever tried different HEs on the same setup, to see which one was most efficient? Thin large frontal vs thick small frontal, as example.

Large front works the best as the radiator fans do a very nice job of pulling air through both cores. i've got the wide thick HE in my car and it works well but not like the big one.

[Hindsight]

This motor made 364 RWHP and 380 TQ

Nice, what are the specs?

[mekohler]

The VCP AWIC is very nice, easy install and Wayne is great to deal with. It is obvious that Wayne put some thought into this. Thanks Wayne.

[Wayne Presley]

Nice, what are the specs?

STI block crank and rods, 2.0 heads, ARP studs, ported heads, 23 psi from a Blouch 2.5XT turbo, VCP AWIC, JE pistons, 1000cc injectors

The VCP AWIC is very nice, easy install and Wayne is great to deal with. It is obvious that Wayne put some thought into this. Thanks Wayne.

Thanks Matthew

[Hindsight]

Thanks Wayne, that sounds very much like the build I had in mind.

[STiPWRD]

STI block crank and rods, 2.0 heads, ARP studs, ported heads, 23 psi from a Blouch 2.5XT turbo, VCP AWIC, JE pistons, 1000cc injectors

Ditto, that's the same setup I was also going to run plus cams and other upgraded internals in the heads. Those hp and torque numbers look pretty good, I'd love to squeeze out 400 HP though

[Wayne Presley]

It's getting cams and springs Friday so it should crest 400 RWHP by the weekend.

[coloskydiver]

Are these kit in stock and ready to ship?

[Hindsight]

Wayne, very interested in hearing if the cams cause spool-up faster/lower in the RPM band. I have read that some cams on the market will do this and still increase upper RPM power as well so very curious to see if it is true (if you are going with a set of cams that are geared for this).

[STiPWRD]

It's getting cams and springs Friday so it should crest 400 RWHP by the weekend.

Awesome! that would be very encouraging. Any other details? I'll be running the Crower 264 cams and springs. I'm assuming your tuning with the Electromotive ECU?

[Wayne Presley]

Are these kit in stock and ready to ship?

Yes they are, I have mounts for the 02-04 and 05-07 WRX donors

Wayne, very interested in hearing if the cams cause spool-up faster/lower in the RPM band. I have read that some cams on the market will do this and still increase upper RPM power as well so very curious to see if it is true (if you are going with a set of cams that are geared for this).

Well we'll get to see back to back comparisons end of this week or beginning of next.

Awesome! that would be very encouraging. Any other details? I'll be running the Crower 264 cams and springs. I'm assuming your tuning with the Electromotive ECU?

They are the Brian Crower stage 2 cams with 272 duration and tuned with the Electromotive ECU. The ECU is controlling the fuel, spark, fans, fuel pump, AWIC pump, and boost control solenoid.

[metros]

Hopping over here from metalmakers thread as to not throw his off topic. When does the VCP water reservoir option come out for your a2wic?

I would think having a reservoir that you can throw ice packs into between sessions would help to cool the water system back down before heading out on track again. Plus the additional fluid volume would help keep the water cooler, longer on track.

[Wayne Presley]

I can add the reservoir to the system now. Would you like the 2.5 gallon or the 4 gallon?

[metros]

I have already purchase the AWIC, but would be interested in the reservoir when I'm a little further in my build.

For planning purposes, what's the size comparison between the two?

[Wayne Presley]

Well I got it on the dyno with the cams installed and it made 410 RWHP and 397 RWTQ



Here's the datalog of the pull showing the manifold air temp

[metalmaker12]

Nice!!!!

[Hindsight]

Wow, look at that flat line! Nice.

[Wayne Presley]

And that air temp is after a full warm up and 10 pulls...

[Hindsight]

Nice, was this on your 6cyl 818 or a customer's 4cyl that has the AWIC kit on it?

[Wayne Presley]

My AWIC on a customer car with a hybrid 2.5 with 2.0 heads, BC cams, valve springs with Ti retainers, Bloch 2.5 XT turbo, 1000 cc injectors.

[JeromeS13]

Wayne,

Any idea of the air temp at the compressor outlet, pre-intercooler?

Thanks!

[Wayne Presley]

It was 89F and inlet temp is 98 so 9°F above ambient is pretty good with no high speed air flow. I did not log pre IC air temps but I'd figure at least 180°F.

[JeromeS13]

Maybe I'm just outside of my turbo's efficiency range? I was getting pre IC temps of ~ 279 degress F... :-/

[Wayne Presley]

279°F, holy crap that's hot!

[JeromeS13]

279°F, holy crap that's hot!

That's what I'm coming to realize. That's only ~18 psi coming from an IHI VF37 turbo (JDM STI turbo). It was originally designed for the 2.0L. Maybe that's where my problem is... I think the next thing on my shopping list is the Blouch 1.5 XT-R. If I maintain the same power ratings, I should be able to cool that charge temperature by a pretty good bit.

[D Clary]

818 cooling 002.JPGI bought some aluminum tubing to run parallel to the cooling tubes, takes a little less room and weighs less than 8 ft of hose

[metalmaker12]

818 cooling 002.JPGI bought some aluminum tubing to run parallel to the cooling tubes, takes a little less room and weighs less than 8 ft of hose

Where did you get tubeing, I have a similar use for it.

[Hindsight]

Wayne, on that dyno run you mention, did you have the radiator fans running, and did you use any foam or anything to seal between the heat exchanger and radiator?

Thanks

[Wayne Presley]

Radiator fans were running and no foam between the radiator and HE. The fans were able to pull a sheet of paper from 6" in front of the HE when dropped so I'd say the fans are pulling a significant amount of air through it even sitting still.

[metros]

Those are stock or aftermarket fans?

[Hindsight]

Nice! All this time I have been concerned with elaborate methods of ducts and baffles to force the air through and seal the rad to the HE. Great to know it is not needed and is just plug and play!

[Wayne Presley]

Stock fans and you could improve the flow by just using foam between the HE and radiator.

[Wayne Presley]

First post was edited to add the bleeder.

[Frank818]

First post was edited to add the bleeder.

Interesting, it doesn't say it has been edited with the small italic line at the end of the post. I guess it's cuz you are an Admin, god you have a lot of power! And that you are such a nice guy, even to this well dressed, smart and fun Canadian

[Wayne Presley]

It's good to be an admin.

[STiPWRD]

Wayne, thanks for posting the dyno plots. Looks like you're hitting full boost 21 psi around 4300 RPM - am I being too conservative or is the AFR a bit lean? Did you start rich and then go lean? Any comments on the timing? Either way those HP and torque numbers look great and I'll try to replicate for that AFR curve since I'm going to be running a very similar setup.

[GUNS]

Wayne, what did you use as a power source for the pump? I'm assuming you would want this thing running constantly or do you have it hooked up to a switch?

[Wayne Presley]

Wayne, thanks for posting the dyno plots. Looks like you're hitting full boost 21 psi around 4300 RPM - am I being too conservative or is the AFR a bit lean? Did you start rich and then go lean? Any comments on the timing? Either way those HP and torque numbers look great and I'll try to replicate for that AFR curve since I'm going to be running a very similar setup.

That AFR is with 110 octane gas and it's only 12.1 when the boost is ramping in and 11.8 or lower for the rest of the pull. With pump gas and the 10% ethanol in the mix, you will want to run it around 11.3-11.4 AFR. The timing curve was set by running it on the dyno and seeing what the motor liked until it stopped picking up torque.

Wayne, what did you use as a power source for the pump? I'm assuming you would want this thing running constantly or do you have it hooked up to a switch?

I use a fused relay hooked up to the fuel injector power source so you have the pump run anytime the engine is on. You could put an over ride switch to run the pump with the car off.