Thotlle boddies and hot air inside the inlet manifold.
All people are against to the cone filters espesially to the c20xe engines and one of the reasons is that is more ductile to the heat of the engine.
What is going on with throttle bodies?
All the system is behind the engine and all the heat is going inside the throttle bodies.
And I know that many people have tb's on cavaliers, and cavalier don't have aeration good like a scooby or an evo.
What is going on with all that warm air which are going inside the throttle bodies?
I did a lot of mucking around with temp sensors and baffles under the scoop on mine and the difference in temp when you get it right is huge - as in 25 degrees huge.
Steve - I didn't think you meant how it sounded - the hot air is properely catered for by the ECU, and you'll get a little less power in both cases - I agree the hot air problem on the standard bosch setup is something different, yes.
It's gonna be both I reckon. On the Emerald you can see the 'compensation' map and it starts to lean off the fuelling and ignition at about 40deg As my average is so high I'm obviously sitting in an altered 'map' all the time?
Bonnet scoops and tb's go together because it's practical and there for a reason. Check it
I think, it isn't the best idea to make a bonnet scoop like the imprezas to the cavalier.
All they will say that, this stupid thinks that he has a scooby but he has only a cavalier, regard less from the fact that the specific cavalier may be faster from the scooby.
A bonnet like the evo's I think is better because is more normal to see it.
basically add about 15-20 degrees onto the ambient temp to get a rough idea of what the engine will be breathing, if you don't have a vent.
and that's on the move..
those figures are for a mk2 astra engine bay with lots of stuff missing - I've also got those louvred vents in place of the standard ones, too.
Mike 'cool louvre' style bonnet obviously worked well - air was probably being sucket out of those vents, rather than pushed in like mine - it shows you can have subtle venting and still get top performance.
i went out for a drive with a laptop in may/june time. it was about 9pm, cool outside, probably 16-20 degrees area. air temp sensor read 32 degrees driving slow and steady. mid fifties thrashing in same conditions.
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