Cirq

Where did you guys mount your coolers? I'm debating putting mine behind the AP2 foux vent with a cut out. My only concern being if the air gets in behind the bumper, hits the 19 row Mishimoto then... Is there enough holes and gaps behind bumper but in front of the fender liners? I don't want it in the central air intake because​ of so many other heat exchanger already in that location.

markforrester99

SlowTeg

mark,

Looks good, but after some further thought I wonder if trying a slightly smaller hole might be better. A 9mm (.354") hole is nearly equivalent to a -6an line (6/16 = .375" actually). The only concern with having a bypass roughly equivalent to a -6 AN line is that not enough oil will flow through the oil cooler. I'd say starting with something a little smaller like a 1/4" sized hole might be a little "safer" and not allow too much oil to bypass the oil cooler, but supply a little more volume to minimize the pressure drop. My physics knowledge is pretty terrible and perhaps the 1/4" sized hole might be a little too small and not be able to supply enough volume? Maybe some real engineers like Khiem or others can chime in here.

markforrester99

Hi, I chose the hole based on calculating the cross sectional area of a AN8 fitting and comparing it to the cross sectional area of a AN10 fitting. I chose the 9mm hole because that combined with the AN8 fitting was similar to the cross sectional area of the AN10. I know that AN10 fittings on the larger Laminova oil coolers provide minimal pressure lose during VTEC from where I had one fitted in the past. Its the cooler that provides most of the restriction. I could probably of increased flow through the cooler by choosing a smaller hole but I think its effect on cooling would be minimal. Most of the mocal graphs I have seen show flow has little effect.

SlowTeg

Thanks for that explanation. I figured you had a logical reason for your decision. That's a good point regarding flow not affecting cooling that much. I forgot that flow, to a point, doesn't have a huge effect on cooling. At some point too much flow is actually detrimental to cooling (which is why thermostats in cooling systems can sometimes help reduce temps vs a free flowing system).

If I do this mod I'll be sure to report back on the pressure difference before and after.

markforrester99

You could spend ages trying different holes but without some sort of flow meter on the cooler lines it would be difficult to keep track of whether its making much difference. The main reason i went with the larger hole was that i wanted to use AN8 lines which are alot easier to route around the engine bay. AN10 is too big and bulky and sometimes its feels like your putting tension on the hose just to get the fittings to connect.

You could get away with a much smaller hole if you used AN10 lines. When i first fitted my Laminova cooler with AN8 lines i was seeing less than 60psi in vtec! Let us know how you get on! Im yet to take mine out on track but the fact that the cooler is red hot after along drive says to me that there is quite abit of flow going through it.

s2k manic

drilled a 6mm hole in my oil cooler sandwich plate and I gained 10 psi when the tsat is fully open on the oil cooler also picked up 3 psi at idle.

yamahaSHO

I just use the sandwich on the right.