marcman804
15+ Year Contributor
- 484
- 10
- Mar 5, 2005
-
Cumberland,
Virginia
I just purchased a RRE Griffin 24 x 10 intercooler from the classifieds and I was wondering if anyone knows how it compares to the kits mentioned in this forum?
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I also found this DEJON powerhouse 2g kit. Same piping route as the ETS kit and intercoler end tanks, difference intercooler core:You must be logged in to view this image or video.
Its only 3", wow the VRSF is 3.5" thick! I believe that just answered my question.
Right now I have a little Greddy thats 20 x 10 x 2.5 I got from a buddy a while ago and its garbage. I want to go bigger because I just went from a 16g to a 20g. I just got my engine installed and everything back together and I want to get the very best I can out of my setup.
Op, Vrsf only sells te kit mentioned above, no 4 inch cores. They are also on back order until at least the beginning of October. I've been waiting for one, but now considering moving on. GL!
Can I keep the bumper beam with this kit?
I've been running a CXRacing 4" IC and thought it would be ok but just like Kiggly told me it has low pressure drops but doesn't cool well at all. It's a huge restriction! The Buschur's ebay IC test confirms the same results. On my car it doesn't even cool well at 20psi . Right off the trailer on a decent day AIT were 77* before the pull after. Looking at a 30psi log of a 2nd gear pull AIT sored to 127*. On another day at the track AIT's went as high as 140+*. Not sure what the AIT's were before the pull but it wasn't a hot day. 140+* AIT! That's ####ing terrible!
Look at the design of the end tanks and the design on the fins (internal design of the fins). Up to a certain point design is more important than the size. A 3 1/2 or even a 4" core doesn't mean much.
VR Speed FMIC - 1150 cfm
PR FMIC - 980 cfm
ETS FMIC (race) - 980 cfm
No, just the manufacturers website(s).
I don't know about any thread comparing the two cores. I'm going by looking at the pics and they have a similar fin design to cxracing. Now Godspeed has a fin design closer to a ets or Garrett's core. Also someone stated vrsf is rates at 1150 cfm. On their site it states that .CX racing does not have the same core design as the VRSF period. its been gone over before. but thanks everyone else for your temp specs.
To start of deciding which IC core to spend your hard earned cash on you need to come up with a airflow figure at a specific boost level. I'll use my DSM results for an example here, just input what you want to come up with the correct number for your application.
I bought my 68HTA knowing that it was capable of flowing 47lbs/min and I was going to run about 30psi to get it there. So you've got to convert airflow to cubic feet minute (CFM) and boost pressure to pressure ratio (PR).CFM = (L x RPM x VE x Pr) / 5660So just plug in the info and do the conversions for CFM and PR, here are the numbers for my application.
PR = (14.7 + Boost) / 14.7PR = (14.7 + 30) / 14.7 = 3.04Now you'll be able to figure out exactly what size of intercooler you'll want for your specific setup, below are the equations.
CFM = (2.0 x 6500 x 95% x 3.04) / 5660 = 663.32
46lbs/min @ 30psi = 663.32 @ 3.04
Minimum Cross Area = ((CFM / PR) + 12.84) / 11.63So just plug in the info (I used 400whp as my goal and a 3.5" deep IC)
Intercool Height = (Minimum Cross Area / IC Depth
Total Volume = (WHP - 50.17) / 0.533
Intercooler Width = (Total Volume / Minimum Cross Area)((663.32 / 3.04) + 12.84) / 11.63 = 19.87 sq/in (MCA)So the perfect IC core size for my setup, using the above equations, is 32" x 6" x 3.5". Since size contraints do come into play its not always possible to find a IC core that "fits the bill" of the perfect core. For example, if the widest core for your application is 28.5" then you'll want a taller IC to make up that surface area you'll be losing. The ideal core for my numbers is 32" x 6" however, the VRSF core is 28.5" x 10" so I lose 4" off the width but gain it off the height so its perfect.
19.87 / 3.5" = 5.68" (Height)
(400 - 50.17) / 0.553 = 632.60 cu/in (Volume)
632.60 / 19.87 = 31.84" (Width)
Here are the dimensions of the three kits we keep referring to, see which one fits your car the best.VRSF - 28.5" x 10" x 3.5"To make it fair, lets see what the numbers would come out to had I used a 3" depth for the core.
PR - 29" x 11" x 3"
ETS - 25" x 10"x 3"((663.32 / 3.04) + 12.84) / 11.63 = 19.87 sq/in (MCA)You'll notice the only thing that changed was the height of the core, and being that the PR core is 1" taller and 0.5" wider the 0.5" you lose in depth doesn't matter.
19.87 / 3" = 6.63" (Height)
(400 - 50.17) / 0.553 = 632.60 cu/in (Volume)
632.60 / 19.87 = 31.84"
I wish we could know for certain each cores pressure drop or CFM, we just have to go off whats advertised. I pulled all the above info from here and just applied it to DSM's. ---> Intercooler Calculator