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Posted
I'm going to upgrade my intercooler and i'm not sure which to go for, larger top mount or front mount so suggestions on a post card which would you have?
Posted

Depends on what power you want to make, a standard wrx top mount is

good for 330/350 bhp, but a sti one is better for cooling and will run 350/400

bhp.

But seeing as you have a nice wrx just fitting a sti top mount will be

enough [Y]  your engine will only take around 300-330 bhp before

it starts to get stressed and ready to go pop.

But then again if you rebuild with uprated internals then you can push it a lot more and then a front mount will be needed [:)]

Id go for a nice tdo5/20g turbo, full decat, induction, uprated

injectors and a nice ecu remap by a top mapper ( andy forrest/bob rawle

) and have a nice 330-350 bhp engine

Depends on the route you wish to take, all down to money [:)]

Tony

Posted

I would invest in water injection instead, this will bring the inlet

temp right down and you could also use a water/methnol mix for even

better cooling.

An ERL system is about £360 but worth every penny

Tony

Posted

Harvey Smith did a budget build and got very inpressive figures if i remember correctly

tdo5

front mount

bigger injectors

induction

fuel pump

fuel pressure reg

and a remap

think he had around the 430 bhp area iirc

One hell of a budget car lol

 Hol has water inj and it improved his bhp figure [Y]

not sure but I think new age cars have better cooling anyway ??

Posted

  Quote

 Hol has water inj and it improved his bhp figure [Y]

not sure but I think new age cars have better cooling anyway ??

My car was just about at the upper limit of the STI7/8 topmount at 370bhp-ish, it was also at the limit of the standard STI pink injectors. As you know I now have a big APS front mount and water/methanol injections. But am still limited by the injectors.

A top mount will always give better drivability than a front mount, but you are obviously limited by power as a result. You also get heat soak in traffic.

However, the 'lower the spec' turbo and the more you push it, the higher the intake charges will be as a result. So a front nmount will help unles you are running a high flow hybrid turbo.

Until recently, FMIC's were all around or over £1000, so people struggled on with top mounts due to budgets. Howerer, there are a lot of cheap ones out there now for the classic, so it actually makes sense to go that route.

Waterinjection actually richens up the fuelling which will loose you power. Hence you need to lean it off at the relevant points. It was this scope that allowed me to get a bit more out of the pinks.

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