Thread: What now?

rar110- you would have to make some pretty cool brackets but it would be a tight one.

There is more torque, if you read my I think second last post i talk about high way temps, I have moved the spotties and need to test it now, next year I am going modify the bonnet even more and may be change the radiator and mount a fan but I am confident I will see a bigger temp drop when things are changed.

Originally Posted by rar110

The IC radiator looks huge. Do you think the IC would fit under the standard filter above the bell housing? Was there a noticeable increase in torque?
An isuzu intercooler meet sounds good to me.
Inside's IC set up is also very well done, and a bit similar to Dranged' setup.

The answer is yes - well at least on a LT95 bellhousing
I did a quick mock up today. The block of wood is 13.25 x 4.25 x 3.25", so very close to the Frozenboost type 20 intercooler (13.5 x 4 x 3.5").
You can see in the photos that I've cut away the lower edge of the air filter bracket to make it fit in, but that wouldn't necessarily be required on the factory filter brackets as they are 30mm angle (mine are 40mm and I removed about 10mm).




In the photo its sitting against the top of the bellhousing, but because the intercoolers have a chamfered edge there would be some clearance with the real thing. Also still about 45mm behind it to the firewall, so could go back a little further and gain more clearance on the bellhousing.
It will also fit long side vertically but might require some bracket trimming etc, which may make it easier to plumb the water fittings.

This setup quite appeals to me as it utilises the wasted space at back of engine and has quite a short run from turbo to manifold compared to a front mount air-air. Also a lot less larger diameter ducting running to the front of the engine bay (probably only a couple of water hoses) and would be very easy to fit a short length of pipe in place of the intercooler if you needed to run the engine with it removed for any reason. In my case maybe as an interim setup to get mobile before I get the I/C installed.
Hmmm - food for thought.

Lambrover - what size radiator are you running for it, and did you get all the
bits from frozenboost or just the I/C?

Steve

I got the aluminium radiator 2in core from frozen boost, I got some hoses and the bosch water pump.

I like your template should work a treat there.

As you may know I mounted my radiator in the bonnet, and as per my notes I moved the spotties, I had a chance to test it out today and it is alot better now, I only monitored the egt's and they where alot lower than before, sitting on 105km temp off 425 to 430 and now boost is sitting on 7psi compared to the old temps at the same speed off i think where around 460 to 480 and was at 10psi. so I think that is a pretty good gain and I am happy with the result, I haven't filled up the tank yet but I reakon it has improved economy.

next year I want to change to a bigger radiator and scoop and fit a thermo, see how much cooler I can get it.

It's interesting that you've dropped boost. Where does your boost gauge read pressure from? Upstream or downstream of the intercooler?

its down stream, at the inlet manifold. it makes sence doesn't it, cooler air gets better bang so needs less fuel wich means less boost for the same power. volumetric efficientcy

Originally Posted by lambrover

its down stream, at the inlet manifold. it makes sence doesn't it, cooler air gets better bang so needs less fuel wich means less boost for the same power. volumetric efficientcy

You've got two competing factors.
1 is higher air density which means higher mass flow and should drive the turbine a bit better to provide more boost.
2 is the cooler egt's which mean less energy to the turbine and reduce boost.

I don't know which one wins overall, but that's for boost measured at the turbo.
Restriction from the intercooler itself will always mean lower pressure at the manifold but it shouldn't be that much.

Originally Posted by Dougal

You've got two competing factors.
1 is higher air density which means higher mass flow and should drive the turbine a bit better to provide more boost.
2 is the cooler egt's which mean less energy to the turbine and reduce boost.

I don't know which one wins overall, but that's for boost measured at the turbo.
Restriction from the intercooler itself will always mean lower pressure at the manifold but it shouldn't be that much.

For reference - the pressure drop spec for that intercooler is only 0.1psi.

Steve

Originally Posted by steveG

For reference - the pressure drop spec for that intercooler is only 0.1psi.

Steve

Do they list a flowrate for that 0.1 psi drop?

Just to clarify, I'm not suggesting the intercooler restriction is responsible for the 3psi lower boost. It's the lower EGT's doing that too.