jonny gav

iTrader: (1)

for more info on charge coolers look here-http://www.scoobynet.co.uk/bbs/threa...threadid=92555


[Edited by jonny gav - 11/9/2002 9:03:09 PM]

Pavlo

use std intercooler, pass water in at the back-top, out from bottom-rear or any diagonally opposed config. Just realised that the lin kabove is to Andy's chargecooler project, which uses the STI intercooler as it's basis.

I still think that if you're going to that sort of trouble, then getting one custom made from scratch is better, and you should be able to sell an STI intercooler for about £150 in the for sale section, which would pay for core and materials to get a new custom one made.

Paul

[Edited by Pavlo - 11/9/2002 11:50:16 PM]

eazytiger10

Another post here with a continuing theme from my last one about charge coolers.Change the heading as suggested by Turbo Steve, does anyone know who makes uprated charge coolers for the scooby. Had great response from last post with lots of good info. Thanks

Pavlo

nobody really

Can't remember your last post, but I have a legacy similar to Stevie. My intention is to get a custom made radiator and uprated pump. MRT do a rad, but by the time it gets here through a distributer etc it's better to get a custom one I think.

On an impreza I wouldn't bother with a chargecooler to be honest, and if I had the room behind the front bumper, and didn't have to cut loads out I would fit a front mount intercooler. The pace one has appeal, but means lots in terms of induction kits etc.

If you really want a chargecooler, then the legacy cooler unit isn't bad, although I ultimately plan to make my own from pieces of custom sized radiator core. The Legacy one doesn't require a seperate header tank, all you need is a pump and rad.

Paul

NINJA

fmic will work much better then chargecooler.heatsoak will compromise effeciency of chargecooler

ustolemyname??stevieturbo

iTrader: (1)

A FMIC is also a lot more expensive than a new pump and water rad. more so when there arent actually any readily available FMIC for a legacy. They are very similar to an impreza, but not exactly the same. They can be made to fit though.
Never heard of an uprated chargecooler unit though, so I can only assume the standard one is reasonably efficient.

Pavlo

a good chargecooler can be every bit as effective as a fmic, in fact with the shorted inlet tract it improves throttle response etc. The pain is that to fit a big enough matrix into the subaru engine bay is difficult what with the inlet manifold plumbing. I htink the later cars are better as the throttle body is much shorter, allowing a chargecooler core of around 6000 cubic cm.

At the end of the day, it's still all about dumping heat to the air at the front of the car. A decent radiator and pump will remove heat soak issues, as even standard, the charge cooler cools quite quickly at standstill (with no boost pressure to heat it up).

Is this a legacy or impreza application? What year?

eazytiger10

It is for R-type impreza. Just trying to get enough info to work out which is best, cost/effciency, as i want to chip the car but reduce the heat first.

Pavlo

Well to give you an idea of prices:

Legacy chargecoole unit: £85 from subaru breakers
Custom radiator: £260 from Pace
Davies Craig Pump: £150 from Merlin Motorsport
Some 5/8" ID hose: £15
Some wire, relay and fittings for pump: £10
New I/C to throttle body hose (samco): £20

Total cost: £340

If you wanted to get a Custom chargecooler unit made, anything from about £200-£400 depending on how you plan it, where you get it made etc. I have outlined a design for the future that uses 2 pieces of core, at £55 each from Pace, then probably add another £200 for end-tanks and water jacket bits, total cost about £320 I should think, but I would do it cheaper by doing the welding etc myself.

For something between the "ultimate" and Legacy cores, Andy F. managed a good set up using an STI intercooler with water jacket top and bottom to pass water through where the external air flows. Much will depend on how easy you can access a fabrication place, whether they will do it cash in hand etc.

Expect to pay about £1000 inc vat for a Front Mount I/C kit, which should (well the better ones anyway) fit relatively easily, that means the cutting about of the bumper is required but not too bad. I still rate the Pace kit in terms of short inlet pipes and relative ease of fitting. Some complain of slightly highe rinlet temps, but an equal number have no problem at all.

Paul

eazytiger10

Excellent thread Jonny Gav and thanks Pavlo for some idea about prices. Interesting about using STI intercooler and making a water jacket around it. But would it cool the air evenly or just top and bottom? Great idea to work on. Also hadn't thought about heat sink!

ustolemyname??stevieturbo

iTrader: (1)

Just curious as to which Davies Craig pump you are pricing there Pavlo. From the ad in Demon tweeks, I think it says the small pump flows 15 l/min. Info I have read rate the subaru leagcy pump at 15 l/min too.
Not much sense buying one of them for that money?? GavinP used a very high flow from
Jabsco
at around 17 gallons/minute. Apparently more flow makes a huge difference to efficiency.

GavinP's Legacy Chargecooler

Pavlo

Stevie,

The bigger pump which flows from 15 to 80L/min I think you need need to look again, as I was left with the same impression when I read it first time.

I think the 15L/min would require something like the controller thay sell to go with it.

As Stevie points out, Jabsco do a range of marine oriented pumps, they are even pricier though. Details on Gavin's chargecooler page which also has various snippets of info and links here.

My inclination would be get the pump, and sort out a good radaitor and try it with the legacy cooler. Measure some inlet temperatures, and see how you go before comitting time and money to a custom jobbie.

As for a bigger purpose made cooler unit, watch this space...

Paul

ze1220

I got the complete kit for £85 from howard chopping on 01422 846868. The kit contained:
chargecooler unit.
Pump.
All the pipes and hoses.
radiator.
I decided to have the rad re-cored using the original end caps, but to increase the core depth and lenght so that it fills the lower apperture in the bumper.

Hopefully I should get change out of £200, and I chargecooler which is good enough for my needs.

Andy.F

I used the higher rated of the 2 Davies Craig pumps which is designed for main engine cooling !
The flow from a 1" pipe was most impressive. When I was testing it pumping through the system , the water would spray out approx 10 foot from the side of the car and empty a 5 gallon drum in about 15 seconds ! More than enough flow IMHO

Pavlo

std legacy pump is less than adequate for high power (circa 300hp and above) engines. A recored rad is a good idea. I was looking to get a core about 600x280x50mm which should keep the water at just a degree or so above abient on it's way into the cooler.

Paul