Does anybody have some good pictures showing rear mounted rad set ups, I have ideas on what I would do but would like to compare my own thoughts with what others have actually done and used.
Rally cross, Jap time attack cars and possibly some of the wilder touring cars (thunder saloons) would be the kind of things i'm looking for.

any help apprieciated.

 

Dan, i posted this up earlier in the year and no-body seems to know i have a few pics i have sourced from cars running this set - up.

The one to look at would be Pat Dorans fiesta only one i can think of in the Uk.

I have emailed a few people direct but no-response.

 

this is the only pic i have of pat dorans

all i know is that they must be 100% enclosed and have good air feeds going in - pats were roof/rear quarter mounted naca ducts

 

Thanks for those,
Its not normally a mod we'd go for but the car we are building would benefit as it gives us alot more room at the front for intercooler cooling.
I'm getting bored of google now!!

 

what car are you doing this on then

 

[quote="Dan@FastFord"]this is the only pic i have of pat dorans

all i know is that they must be 100% enclosed and have good air feeds going in - pats were roof/rear quarter mounted naca ducts

quote]

This is correct but there is also formula's for calculating the correct size required before and after the rad to maintain airflow, I dont want to turn it into a built in parachute create aerodynamic drag.

 

The silver Escort that used to be Stian's was complaining of over-heating issues (or rather I should say, using that as an excuse for his lack of straightline performance compared to the UK cars that went over to Gatebil ), so maybe not such a great idea?

As has been said, it has to be absolutely perfect to get a good result, so will no doubt take lots of experimenting.

 

https://passionford.com/forum/viewto...asc&highlight=

Here is the link to the thread i started - lots of good tech bits here,but as yet no info from anyone that has actually built and used that set-up.

I would say though that from the look of Stians car it flowed better, Liefs set up looks differnt and at Gatebil he was running with the rear quarter windows out to try and force air in..

It must be in sealed enclusure with air scooping in from underneath and out the back, The ducting on windows will draw the air in under vacum effect when the vehicle is moving and also allow hot air to escape when stationary.

 

iirc pats seen a max water temp of 94 degrees, and that thing gets propperly abused.

it does need to be done right tho!!

a lot of effort tho.

 

looks like lots of testing then starting with my own ideas as the base line. one major problem is the slow speed cooling as generally the design is for maximum speed conditions in hope that at lower speed the cooling needs will drop faster than the cooling ability of the system.

 

I think you will need to rely on the cooling of the fans at standstill, they will need to be big as possible and hopefully draw through some clean air, if its sealed nicely this should work...

Not going to know, until you try, but im very interested so keep us all uptodate

 

 

thanks Steve, any more info on either of those cars

 

In what way mate?

Basically they 2 of the fastest Time Attack cars in Japan, big power track cars with rear mounted rads.

On that note, heres another, shows the rear mounted rad quite well at the start, and the rest of a vid is just awesome in a fucking mentally fast car way.
http://uk.youtube.com/watch?v=lOJjBrh6-qg&e

 

Whose car is this Danny?

 

Steve, FUCKING HELL! that gold R32 is stupidly FAST

 

And thats not the fastest Jap time attack car by a long shot either.

Its a whole different world of mentally fast over there dude

 

Stevie.....that liner sure isnt shy & you say that there are far faster cars...


anymore vids?

 

must be the Gold wheels

 

Not yours so dont panic! lol

Thanks Steve, ye was just more detailed pics I was after in and around the car. has alot of relevant to what i'm doing.

 

Didn't the early ground effect F1 cars have really low skirts that sealed the car to the ground creating suction(reverse hovercraft effect). You could do the same AND keep the temps down

 

Whose car is this Danny?[/quote]

Not yours so dont panic! lol

Haha Im always up for new ideas so wasnt panicking just wondered whose car it was

 

really hard conversion to get right

 

pat dorans scanned from fast ford... air in through roof and rear quarters, then out the number plate area of the hatch.

 

Heres my attempt (although pics may already be in the linked thread above) which is not yet 100% finished - i've only mocked it up in MDF so far - when I know it works, i'll redo it in Alluminium:









Still a work in progress - got to cut the boot floor so i can get the carbon fibre windage tray fixed and vented. Principle is that the air will be 'sucked' through the rad rather than forced.

But its a bit of trial and error.

 

good work there mate, like you say though trial and error, on this one.

your most certainly getting there though...

good on ya for trying it too

 

Bomber i can't see that working well at all the 2 ducts are far too small and any air coming through them will just go straight through that area of the rad core creating very localised cooling whereas you want uniform airflow through the entire core

 

Thats what I was thinking

 

fail

 

We'll soon see.

 

you'll notice that the jap cars are completely vented and open at the rear ! both Pats car and Dermot carnegies cars suffered very badly with excess heat , Dermots is now un enclosed and sees a greater reduction , i suggest that you have a word with julian godfrey for the definitve word on this as i know theyve got it right now .

 

I think the last time Dave spoke to the Norway crew about this, they said that mounting it in the floor and ducting air down to it there worked better that having virtical in the back.

 

Looks best, but not many people will wanna butcher the rear of there cars....

 

if you want a rear mounted rad but trashed to cut anything youve got your priorites massivley wrong though, setting yourself up for a fall.

look at the only ones thats proven to work, the Jap time attack cars, and do it that way.

i mean...






Oh and

 

Steve.. I dont care what cars looks like! If I had a rear mounted rad, If have it something like that SX


Awesome last pic

 

Yeah i know YOU wouldnt, youd be happy to chop the roof off and replace it with a giant mechanical spunking cock if it helped

And yeah, that SX is properly badass

 

Dentsport in Boston, Massachusetts, they have a couple of Escort Cosworths. One is ex-WRC car and the other is a hill-climber, I've seen the 180 before at an event. Wicked quick.

 

Dentsport have EscCossies too?

Ive seen a few of their cars, but never them, cool!

 

If it helped of course