johnny racecar's fmic, who has one?

[1badtsi]

jc whitney, summit, or for me a friend who has extra

 

[sweet97]

Icouldn't find the price of the 1G DSM on the website. mark

 

[superflip506]

i don't know if tyrus is reputable either. he doesn't have any flow ratings and isn't that a good thing to have if you sell intercoolers?

 

[98spydert]

Not trying to stick up for him or anything(yet) but he does have 100% positive feedback on over 800 transactions.

 

[98spydert]

jc whitney, summit, or for me a friend who has extra

Aluminum, not aluminized steel

 

[1badtsi]

well..................

 

[me612]

I prefer SS over aluminum due to the fact that aluminum insulates less, which could cause hot engine air to slightly raise the temps of the air in the ic piping. Don't want to start a battle with that though, so to answer your question, RRE has all the piping you'd want, Alum or SS or Aluminized.

 

[Turbocharged]

Benefit of aluminum over SS:

1. Much lighter
2. Lower specific heat. This means that less energy is required to change the temperature of the metal. This is a double edge sword because aluminum piping will increase in temperature faster but will also cool much faster.

Given two equivalent WOT pulls, one with aluminum and the other with SS:

The SS temperature will not increase as much as the aluminum, but will not disipate heat very well afterwords. The aluminum will increase more in temperature, but will disipate the heat quickly after intake temperatures drop (off throttle).

In other words, SS is good for a single pull, and then is heat soaked. Aluminum is better for repeated runs because its temperature will decrease quickly between pulls.

Anyone have any other input on advantages/disadvantages.

 

[98spydert]

Another plus would be aluminum is a lot easier to work with for the DIY guy as far as cutting and such. A small plus anyways

 

[kpt4321]

1. Much lighter

Yup. However, given the mass of pipes in general this doesn't matter unless you need to drop a pound or whatever.

2. Lower specific heat. This means that less energy is required to change the temperature of the metal. This is a double edge sword because aluminum piping will increase in temperature faster but will also cool much faster.

WRONG! Please don't post information like this without checking on it first.

Aluminum has a specific heat in the range of 0.9 J/gK. The specific heat of SS varies based on the alloy, but it will tend to be in the area of 0.4-0.5 J/gK. That means SS has about HALF the specific heat of aluminum.

Given two equivalent WOT pulls, one with aluminum and the other with SS:

The SS temperature will not increase as much as the aluminum, but will not disipate heat very well afterwords. The aluminum will increase more in temperature, but will disipate the heat quickly after intake temperatures drop (off throttle).

In other words, SS is good for a single pull, and then is heat soaked. Aluminum is better for repeated runs because its temperature will decrease quickly between pulls.

First of all, this is obviously backwards.

Second of all: There is so much heat energy contained in the charge air, so little mass of the charge pipe, and such a small degree of instantaneous heat transfer, that it's not worth worrying about this. At all. The pipes get warm when you put hot air through them, and they cool down when you don't. Regardless of the material and the number of pulls, you don't need to bother worrying abu heat transfer to/from the intercooler pipes, unless you're holding a blow torch to one of them or something.

 

[NDgsx]

Kyle this ADFX place says you should run aluminum piping though, and they are a shop so they must be right . If you really think that the ic piping is heating up the charge air you need to go out in the garage, stare at your car for a minute, think about air velocity, and then realize that your ic piping will not dissapate any heat from the charge air, nor will it heat up significantly. That's literally one of the dumbest ideas I've heard in a long time.
Most DSMs are over 200 degrees under the hood when running. Post ic temps are NOT going to be over 200 degrees. Even if the charge air spent enough time in the ic piping to radiate heat, it would be possible as the engine bay is hotter than the air inside of the pipe anyway.

As for tube and fin intercoolers being to restrictive BS. There's a big difference between the oem tube and fin ics and aftermarket units. Most aftermarket tube ICs do NOT have the incredibly small tubes the OEM ones do. Yes an increased number of fins does restrict airflow a little more, but the "increase" in pressure drop is negligable. A extruded IC will post the highest flow numbers out of any constuction, but they do not dissapate the heat as quickly. They function well as a heat sink, which is fine for drag racing.
I can do WOT repeatidly without a huge rise in intake temps over time, that is a problem with most extruded cores.

 

[98spydert]

Thanks for the info NDgsx. Are the cores GReddy uses similar to these?

 

[1badtsi]

tube n fin is tube n fin



lee when do i get pics and video?

 

[98spydert]

IC will be here wednesday so next week for the pics, but I'll shoot a mini DV vid to send you today of the "stutterbox."

 

[mach1one]

does anybody have actual before/after timeslips/dyno graphs when installing one of these FMIC?

 

[1badtsi]

does anybody have actual before/after timeslips/dyno graphs when installing one of these FMIC?

i should have some up asap, im just working on getting the car back on the road at the moment

 

[98spydert]

Sorry Mike, went to grab the cam and the battery was dead I'll do it over the weekend.

 

[NDgsx]

Thanks for the info NDgsx. Are the cores GReddy uses similar to these?

Yes, same construction. As to tube size and fin count though I do not know.

 

[1badtsi]

Sorry Mike, went to grab the cam and the battery was dead I'll do it over the weekend.

no prob yo

 

[96whitetalon]

I bought one and I will have it installed by the end of the week. I will write up a review

 

[98spydert]

What size did you get? The 25x7.75.2.75 core?

 

[14.5 drift]

are jr's smaller intercoolers the same hybrid design as his big ones?


http://cgi.ebay.com/ebaymotors/ws/eBayISAPI.dll?ViewItem&category=33742&item=7923801400&rd=1

 

[96whitetalon]

yeap i bought the 25 wide X 7.75 tall X 2.75 deep core.

 

[14.5 drift]

wow, those are kind of cool.

 

[98spydert]

yeap i bought the 25 wide X 7.75 tall X 2.75 deep core.

Sweet, I got the same one. It'll be here on wednesday so I guess we'll have a couple reviews. Are you hittin up the dyno afterwards?