+10....its downright evil sounding!

 

I think its 14.5 long 2.5 thick and 8.5 wide.. but its tube and fin design...

 

Those are truly bad ***. I've seen them before But they're also a lot of $. A lot

 

Fixed

 

Mark can you show photo of your 3.5" along with you 2.5" IC. Thanks!

 

your looking at them... the one on the left is mine... the 3.5" and the one on the right is pure stock... it looks 3.5" tall but its not...

 

LOl thats a good one...
mark

 

Thank you Mark! Another question is my car has k24/20G set up. I wonder if your 3.5" IC is better fit my set up than your 4.5" IC which may a bit overkill for me?

 

Trust me that you need ICs.... a 20g is a must.... I can make them with 2.5" OD piping or for stock hoses... the 4.5s are on bigger set ups... but a 20g with injectors and a intake would love the 4.5s...
I have some data from my ski800kit before tuning.. I did some 3rd and 4rth gear pulls... looks like its doing the job considering the stock ones increased by 41 degrees C. Yet the 4.5s only went up 8 to 10.... and the 3.5s with the stock ends went up 20...

 

agreed.

I personally think that the 4.5 inchers of anyone's make should be the standard of all turbo systems other than stock. Increasing pressure increases heat anyway you slice it. A more efficient core is needed at any level above stock pressures, which is why the GT2 and X50 had larger intercoolers. The stockers CAN FLOW enough for 600whp(I did it), but they are WAAAAY out of their efficiency range and there is a rather large pressure drop.

Justin

 

At 600whp, how much power are we giving up sticking with stock ic's, say at 1.3bar?

 

I can tell you that I have datalogs and dynos ( can email them) showing 18g car peaking at 1.1 bar on dyno with both ICs ( stock and 3.5s) and the 3.5s made 20 rwhp just by swapping them out... nothing else changed... and thats with stock 1.8" ID hoses.... We noticed with out 3.5s ICs car made a little more PSI... it has no boost controller....
AS soon as figure out how to export Exel files on a MAC and upload them I can show the info...

I took a pic of the monitor... this is a run 0 to 243Km on my 3.5s with stock hoses....... you can see the temps went up 30 degrees C at 243 km...




and here is the same car same boost nothing else changed except the ICs.... this is on Stock ICs with temps at -2.25 C. ... thus the temps went up 41 degrees C... had this been in 70 degree F weather instead of sub freezing 28 degreesI think the difference would be even greater... with that said the bar and plate 3.5s direct replacement Ics did lower the temps by 10 degrees C minimum at 243 km... we seen even 20 degree C on other days... same car, same tune, same boost... thats about 40 degrees F....

 

stock vs Boost Logic 4.5 inchers on my personal car was 50rwhp or more. On WM injection it was 100rwhp. Same boost, almost the same tune. Definitely needed. Where I noticed the most difference was with heatsoak in back to back runs on the dyno, and when doing high speed test runs at our private test track. Sustained runs saw no heat soak(+15F) vs some soak(+50F) by 150mph on the stockers. I posted the data and dyno sheets on 6speed a couple months ago.

here is the link

https://www.6speedonline.com/forums/...turbo-ics.html

Justin

 

Thanks guys. Great comparo. As you know I'm "on the Meth" and was wondering where that magic line was where intercoolers would be "necessary". I guess they're never "necessary", if you don't care about more good clean power. My IAT's have always been low and the consistancy of my car is stellar. On 80degree days my IAT's are between 90-110 and don't really increase, even after many back to back high speed runs or 60-130's. As a matter of fact, I don't ever recall my IAT's being over 120, even at the Texas Mile? I realize that bigger IC's will be a benefit, but how much benefit for the cost? I'm guessing once you start getting into the higher boost levels (1.5bar+) (size of turbo and volume of air notwithstanding), is where you will see a noticable increase in IAT, especially if you don't have meth or IC's.

 

Are you spraying the WM before or after the IAT sensor on the Ypipe? Mine is after, right before the Throttle body; if yours is before, that is quite possible why you are seeing lower IAT's. The reason I say this is that mine instantly went over 120 here in Texas on a 3rd gear pull alone. If you live in the arctic, then I digress Incidentally, I also have not hit 1.5 bar yet, and my comparo was all other things equal. I am not saying that intercoolers are necessary, but I am saying that it is "free" power that you are already paying for.... why not take advantage of it?

justin