oohnoo - Large SMIC's :)

[oohnoo]

Adding the 8.1" core to my list. Here's what I don't understand from what Bell has listed on they're web site. An 8.1 x 8" x 4.5" core is listed at 683cmf. But meanwhile a shorter core 8.1" x 6" x 4.5" is 701cfm. Going to have to call Bell Monday and pick they're brains.

[Ange]

try get larger surface area and less thickness. More effective

9x9x4 would be perfect imo

[sergechronos]

9x9x4 would leave very little room for the end tanks, and there's no real downside to running a bigger thickness outside of the cost. Seems most folks are trying to find options bigger than DSMs and smaller than Gene's, the problem is that the cost difference between cores is comparatively small (8x8x3 = $207, 8x8x6 = 260, 8x8x4.5 = $225, 8x6x4.5 = $210). So it just doesn't make sense to make smaller cores as there's little cost savings, and it's hard to get larger due to fitment. Only way to really reduce prices is to buy China cores, but then you have to make them oversized anyhow to compensate for the quality being worse. Doesn't matter as much from FMICs just because they have so much surface area that the lower quality isn't as big of a factor.

You have approximately 9.75 horizontal width with 97-98 bumpers, and I believe the 1g TT bumper ( maybe even the 1g VR4 bumper but don't have one to test) additionally you only have about 13" of vertical clearance without them sticking out the bottom of the bumper. With a 9" height, the end tanks wouldn't be able to support 2" piping. Unfortunately you just can't get much larger than an 8x8 plane. With the quality of the Bell cores though, these should still compete with the FMIC options for the platform that mostly use inferior cores. I looked into getting cores made in China, but I'd have had to sell 5-10 sets to get the price down to around $600 a set to connect to stock piping which is just unlikely to happen and I'm not in a position to invest several thousand into it when for just a few hundred more someone (like Bob) could make it with quality Bell cores.

Jim, why not relocate the SMOC to the front? After going through a high FPI 4.5" thick core, the air would likely be very hot upon leaving the SMICs and likely wouldn't do much to cool the SMOC.

Bob, if you're interested in some custom work for a set, there's some stuff I'd like to have done (including piping) that I'd like to get a ballpark price on so that I can plan and save up for it.

[Ange]

9x9x4 would leave very little room for the end tanks, and there's no real downside to running a bigger thickness outside of the cost.

where did you come up with this?? air travels through better in a thinner core.

there is a reason f1 cars have intercoolers that looks like this



sorry to derail. great what you're doing here oohnoo

[sergechronos]

Off topic: This is on tangentially related to the topic at hand Ange so I will open a new thread for the discussion if you are interested. The short version of what I'm saying is that in this particular situation and usage that these cores will see, the cost difference for Bob to produce 9x9x4.5" versus doing an 8x8x6" (ie. anything with larger volume and higher CFM support than the 8x8x4.5" ) would be higher as Bell doesn't offer a 9x9x4.5" core and the differences anyone would see would be very minor in actual usage.

Back on topic: At any rate Bob, these are fantastic and glad to see someone offering quality side mounts at reasonable prices.

[mb7050]

Adding the 8.1" core to my list. Here's what I don't understand from what Bell has listed on they're web site. An 8.1 x 8" x 4.5" core is listed at 683cmf. But meanwhile a shorter core 8.1" x 6" x 4.5" is 701cfm. Going to have to call Bell Monday and pick they're brains.

less cfm because the intercooler core tubes are longer in the 8.1 x 8" x 4.5" cores vs 8.1" x 6" x 4.5" cores.

the longer the tube, the more drag

8.1 x 8" x 4.5" 8" tube lenght

8.1" x 6" x 4.5" only 6" tube lenght

[oohnoo]

So would it be more better to make the core in a 6" height vers the 8". Make things easier for fitment especially with 2" piping and the ABS up top on the passenger side.

Also would it be worth my time to also offer a smaller one for cars with less power levels? This one would be with only 3 1/2" thick and come with 1 3/4" piping with routing like oem.


3.50 x 8.10 x 8.00 - 532 cfm


8.1" x 8" x 4.5" - 683cfm
8.5" x 8" x 4.5" - 717cfm
8.8" x 8" x 4.5" - 742cfm

8.1" x 6" x 4.5" - 701cfm

less cfm because the intercooler core tubes are longer in the 8.1 x 8" x 4.5" cores vs 8.1" x 6" x 4.5" cores.

the longer the tube, the more drag

8.1 x 8" x 4.5" 8" tube lenght

8.1" x 6" x 4.5" only 6" tube lenght

[2fnloud]

Are we talking I.D. or O.D. for 2" because the only SMIC hard pipe kit that people can buy now is the CXRacing kit, and that is 2" O.D. (just confirmed from CXRacing) and even the DNP hard pipe kit is 1.9xx (2" O.D.) as well.

So taking that into consideration, does that help clearance issues? Also what size are we talking to support a 600 AWHP level? I ask because I honestly do not see that many people building beyond that.

[mb7050]

So would it be more better to make the core in a 6" height vers the 8". Make things easier for fitment especially with 2" piping and the ABS up top on the passenger side.

Also would it be worth my time to also offer a smaller one for cars with less power levels? This one would be with only 3 1/2" thick and come with 1 3/4" piping with routing like oem.


3.50 x 8.10 x 8.00 - 532 cfm


8.1" x 8" x 4.5" - 683cfm
8.5" x 8" x 4.5" - 717cfm
8.8" x 8" x 4.5" - 742cfm

8.1" x 6" x 4.5" - 701cfm

this is from bell site
"The longer the tube the greater the pressure loss accompanied by a slight increase in efficiency."
"The most heat comes out of the tube where the temperature difference between the inside and the outside is the greatest. That exists in the first couple inches of the tube. The last inch of the tube, wherein the charge temperature is rapidly approaching the cooling media temperature, will transfer very little heat, thus being of minor use."


quick bench testing stock sidemount
ambient temperature 64f
setup


inlet temperature 228f


0" tube lenght 227f



~2.5-3" tube lenght 205f


~4" tube lenght 175f


~6" tube lenght 135f


~7,5" tube lenght 122f


outlet 122f


if the stock core would be only 6" long outlet temp would be around ~~13f higher in this test

i would use the cores with longer core tubes

[oohnoo]

Piping is always measured in OD. Both the DNP and CX kits the piping is 2" OD but both tapers down to 1 3/4" on the ends to mate up to the oem pipes which are 1 5/8". So actually I think the 1 3/4" piping would work without hurting performance. This way also I'll be able to shorten the end caps a little also....we'll see.

I have to wait till my car gets back from the shop as Ray did't have a single car there that I can test it on. Either they had the FMIC still on or if it was off the bumper was off also. I did stop by the shop where my care was and did a quick test fit. The mock-up I had was 8.8 wide and fit without any issues but it's going to be tight on the passenger side with the ABS there. Once the car comes back this week I can take my time and make it work.

Are we talking I.D. or O.D. for 2" because the only SMIC hard pipe kit that people can buy now is the CXRacing kit, and that is 2" O.D. (just confirmed from CXRacing) and even the DNP hard pipe kit is 1.9xx (2" O.D.) as well.

So taking that into consideration, does that help clearance issues? Also what size are we talking to support a 600 AWHP level? I ask because I honestly do not see that many people building beyond that.