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So it seems that the 2.4 engine is limited in the about of boost it can handle from a turbo. Why is that? How much is it limited to? Is there a way of reinforcing the engine so it can handle more pressure?

Is it more limited than other sport compacts?

Thanks.
 

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So it seems that the 2.4 engine is limited in the about of boost it can handle from a turbo. Why is that? How much is it limited to? Is there a way of reinforcing the engine so it can handle more pressure?

Is it more limited than other sport compacts?

Thanks.
Too many factors to list but mainly: weak head stud; all internal part too weak; too high conpression ratio compare to turbo engine.....
 

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well are 2.4 is a 2.0 block
they bore out the block to put in bigger pistons etc.
thus making the sidewalls thinner and the argument is it wont hold as much presure with out cracking understress.


I mean we have Crock who ran the hell out of a nitrous kit and his car is still on the road
oh yes this motor was not built for a turbo from the factory..
so you can't put high amounts (some psi yes) of PSI in it now
if you rebuilt the motor that would be a diffrenet story

Can I ask how much Hp your looking to gain?
 

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They may fear for the life of the head gasket and/or connecting rods. Both are subjected to significantly more pressure when you add forced induction. Keeping boost numbers on the low side will help with reliability.
 

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Yea 150 shot nitrous is just too ridiculous for this car. It was fun using for 4months. Turbo is next.
 

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every engine is limited in the amount of boost it can hold.. even factory boosted engines..
as matemorh said there are alot of factors to what make a " strong" or "weak" engine..

however just because the 2.4 is "essentially" a bored out 2.0 doesn't mean that it's any weaker. who knows what kia did to the 2.4 sleeves they could've very well made fluted water jackets on the sleeves so they will handle higher pressure/ temps very well maybe even better then the 2.0. what are both of their internals made out of?

CR is moderately irrelevant yes it effects cylinder pressure which will increase potentiality of issues HOWEVER>. on a proper/ well tuned higher comp engine you can run less boost and make a good amount of power with a better powerband

there is no "set number" of boost or set number of how much hp an engine can take.. shit i know someone that made 436whp with an unfinished tune on the engine i had in my car before it blew.. when a sleeve cracked.. a sleeve that was rated to 700 hp (the head gasket failed dumped coolant in.. can crack shit and he admited to not a full tune in which he cranked it up 2 more psi on top of what he was putting 436whp down)

psi is a measure of restriction in the system

what breaks things is trq and cylinder pressure ( as well as misc tuning issues) because of alot of flow..

other things that'll also effect stability of the engine is efficiency of the compressor (turbo or sc) within the amount of boost commanded.. if you're out of the efficiency range.. you'll blow hot air.. hotter air will cause issues
 
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