[KvarnisDeltagare]

Det funkar trots allt med en större tmic, det är mer än bevisat.
men då får du kika på dom dyare alt’n som finns, inget billigt smek !
Hyperflow är bra lr MRT

Andy åkte mitten 10:a med en tmic..modell större 😀

[p_ilisDeltagare]

Saxat från Nasioc:
Spdusa.com
The stock intercooler is quite large for the size and power of the engine. Just like the real blow-off valves working on high boost race cars, large front mount intercooler volumes are necessary to cool high boost, high flow engines such as rally cars and road race cars. The larger intercooler needed no longer fits into the hood, so they mount it in front of the radiator where there is more room. A common belief is the intercooler is moved to give it more cooling air. This is not actually 100% true.

An aluminum intercooler reaches maximum efficiency with just 15-20 mph air moving across the fins. As one can realize from this statement, it is then much more important that a top mount intercooler have a complete seal to let the cool air enter than it is to worry about not having enough air. How may aftermarket top mount intercoolers have you seen where the owner has removed the rubber seal or it no longer fits?

You can also now understand that if the intercooler does not need a lot of flow, then the diffuser plates are not needed on a properly designed hood scoop. Yes, they guide the air better. But, does the air need guided better? In fact, any normal amount of air pressure sitting on top of the intercooler is fine. Yes, the air pressure maybe lower on some area and higher in others across the face of the intercooler, but an adequate amount of air flows through the cooler. If anything, the drawings they show of the air flow being largest at the rear of the intercooler housing is correct. That is the hottest part of the intercooler!

Provided we do not need a really large volume intercooler, we are actually better off leaving the intercooler in front of the throttle body instead of going to the expense of a front mount. But it must retain a proper inlet tray and seal.

Here is why:

First, there is terrible amount of lower rpm throttle lag introduced in the longer intake tract and high intercooler chamber volumes when running a relatively lower boost application. To us it makes no sense to drive around with a 350hp intercooler on a 260hp car, must less a 227hp car. We do often recommend larger top mount intercoolers for tuned 300+hp WRX engines, please do not misunderstand the point. But to install a front mount intercooler often gives up more in drivability than it gains in power when running on pump gas at the 280hp levels we are talking about. At some power levels, say over 350hp, front mount intercoolers becomes a necessary advantage of perhaps 10% power, but a properly shrouded top mount intercooler at moderately higher than stock boost levels gives better midrange punch and throttle response. This is the advantage of just having that larger intercooler air chamber in front of the throttle body instead of miles away via a maize of pipe. The Subaru WRX turns its intake manifold around with the throttle facing forward for just this reason.

Here is the popular argument. A guy is running “18 pounds” and says to me, “Well, my engine needs a bigger intercooler because my inlet temperatures are higher now I turned up the boost”. This is a classic. The real story is the stock turbo is running way outside its efficiency range and is making tons of heat more than what a very slightly larger, properly sized turbocharger would make at the same boost. In this case, adding a properly sized turbo, his inlet temperatures would not have climbed so high and the standard intercooler with a little water spray would be just fine.

Please do not make a large intercooler or a front mount intercooler your first purchase. Yes, they are better, yes they help in all cases with intake charge cooling. But, we have other fish to fry first. For the average pump gas tuned WRX we need not get a bigger intercooler up to the 280hp +/- level.

Tyckte det var intressant. 🙂

Sen är ju nackdelen med fmic att man måste såga och modifiera i fronten vilket man slipper med toppmonterad.

Mvh
Peter – som kommer köra större toppmonterad variant :+

[SecretAgentManDeltagare]

Det funkar trots allt med en större tmic, det är mer än bevisat.men då får du kika på dom dyare alt’n som finns, inget billigt smek !Hyperflow är bra lr MRTAndy åkte mitten 10:a med en tmic..modell större 😀

Japp, men de alternativen är betydligt dyrare än en Hybrid, och en fmic är alltid bättre. 😉

/J

[KvarnisDeltagare]

Inte alltid, till ca 300Bhp känns en fmic onödig om man inte åker för mycket gatljus racening i stan.

Vill man betala lite mer och jävlas mindre så är en bra tmic helt ok upp till 350-400Bhp.

Men om man kan tänka sig lägga ner lite tid+ risken med trimträsket ;)så är en hybrid/fmic det igentliga det enda riktigt valet 🙂

[BodyshotDeltagare]

upp

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