Compound boost.

[Dipstik-sportech]

The gtx4088 is a shit turbo just so you know

[the_one_mike]

I'm glad this thread got back on track.

I need information in case I hit the lottery and wanna muck around and masturbate.

[justatroll]

[killboy]

Originally Posted by DustinS

The Plan was to run a V-Mount Set-up with an intercooler post-turbo from the beginning. Though I may try just adding a pump and seeing where that lands us...

Our plan is to upgrade the small Cosworth radiator/intercooler to a full-size radiator, v-mount it, then add another air/water exchanger between turbo and SC to cool the charge going into the SC. This would all add coolant capacity to the current system of course, so I don't know if that is within the capabilities of the standard pump. This keeps us from having to add yet another core to the stack/V that you would by utilizing a standard air/air intercooler to cool the charge post turbo.

[DustinS]

Originally Posted by killboy

Our plan is to upgrade the small Cosworth radiator/intercooler to a full-size radiator, v-mount it, then add another air/water exchanger between turbo and SC to cool the charge going into the SC. This would all add coolant capacity to the current system of course, so I don't know if that is within the capabilities of the standard pump. This keeps us from having to add yet another core to the stack/V that you would by utilizing a standard air/air intercooler to cool the charge post turbo.

Do you have a heat exchanger in mind? I though about doing a/w for the turbo as well, but wanted to keep it simple at the beginning.

[killboy]

Originally Posted by DustinS

Do you have a heat exchanger in mind? I though about doing a/w for the turbo as well, but wanted to keep it simple at the beginning.

Something like the one I linked to in that post you quoted. Already have the Cosworth kit, which comes with liquid/air intercooler and heat exchangers, (not sure we're talking about the same things here) so I was just going to expand on that...larger liquid intercooler up front, add another heat exchanger post turbo if that makes sense. Keeps it simpler than adding air/air intercooler and quicker response.

[justatroll]

Originally Posted by Norville Rogers

I was hoping to learn something from this. It all turned "Lord of the Flies" very quickly.

I read your comment, and saw one of the thread tags below and it reminded me of this:

[Matt@Cosworth]

Originally Posted by killboy

Something like the one I linked to in that post you quoted. Already have the Cosworth kit, which comes with liquid/air intercooler and heat exchangers, (not sure we're talking about the same things here) so I was just going to expand on that...larger liquid intercooler up front, add another heat exchanger post turbo if that makes sense. Keeps it simpler than adding air/air intercooler and quicker response.

if you already have our kit I'd recommend just trying to increase the coolant flow as the 1st step as this gives a good boost to the cooling capacity
the up front LTR was originally sized to give 40Kw of heat rejection

not that a larger Vee setup wouldn't be better but you might be surprised how far you can push our rad

[DustinS]

Originally Posted by Dipstik-sportech

The gtx4088 is a shit turbo just so you know

Guess that answers that question.

Originally Posted by Matt@Cosworth

our intercooler system was sized for 400Bhp worth of flow and 40Kw of heat rejection with the LTR we supply and 15 ltrs/ min of water flow - additional capacity will be available if you can increase the water flow, perhaps run two bosch pumps in series?

So If I read right, the pump only flows 15 Liters per minute? I am seeing recommendations to run pumps of 20 Gallons per minute. Which is ~75 Liters per minute?? Albeit on much higher powered drag cars.

[the_one_mike]

Originally Posted by Matt@Cosworth

additional capacity will be available if you can increase the water flow, perhaps run two bosch pumps in series?

Are you suggesting... a compound boosted cooling system for our compound boosted twins?... A boost within a boost within a boost... Twinception

[Matt@Cosworth]

Originally Posted by DustinS

Guess that answers that question.



So If I read right, the pump only flows 15 Liters per minute? I am seeing recommendations to run pumps of 20 Gallons per minute. Which is ~75 Liters per minute?? Albeit on much higher powered drag cars.

thats correct which is pretty normal for a water heat exchanger intercooler system
these pumps are used on loads of VAG cars and JLR too

with intercooling there's 2 approaches
either you have a low pass rad and a high water flow or a high pass rad and low water flow - we went for the latter (ours is a 4 pass rad) as high flow water pumps are pretty expensive and need a lot of electrical power - unless you tap into the engine cooling system of course but then you have a heat disadvantage

and the simulation only showed about 2-3 degrees disadvantage to this route over a low pass high flow solution ( for the 40Kw of heat rejection)

[DustinS]

So far I plan on adding a Bosch 20gpm pump to the build list. This should increase cooling system a good amount. I am also starting to look for alternative intercoolers for the turbo just in case the intake temps are still too high or the car suffers from significant heat soak.

I am wondering if running a shorter, slightly deeper intercooler might be the way to go. This along with proper ducting should allow cool air that doesn't pass through intercooler to get to the heat exchanger/ A/C Condenser/Radiator behind it. Hopefully avoiding any heat related issues that would warrant any crazy modifications. Going to get some measurements of the grill opening tonight

[Matt@Cosworth]

don't suppose you have any details of that 20GPM Bosch pump?

sounds like a good part

[ajc209]

Originally Posted by Matt@Cosworth

that should help and pretty reasonable too

I know of another firm who's developing a 82mm body by the way

Wouldn't happen to be a Northampton based firm would it?