E-SPec pistons

[akhilleus]

Alright explain how this works Man. I think what u r saying is that the fp 1.8L pistons are used in the 2.0L with an oversize .5. The faq did say that the fp and fs are interchangable. Is that how it works. If thats the case i could buy 1.8L pistons here right ...or wrong. And then does twilights 2.0L have the oversized pistons or are they an e-spec class. Or are there standard size 2.0L 9.7:1 pistons. help me out cause i am getting confused. the faq doesnt explain it well...

 

[70]

I think he is saying that the US 1.8l pistons will fit in your 2.0l motor just fine and you will have 9.7:1 compression. This saves you the hassle of buying pistons from Australia and having them shipped.

This saves you money. This saves you time.

 

[twilightprotege]

just sounds strange that there is a 7mm increase in stroke, but you only increase compression by 0.6

 

[akhilleus]

Yeah thats what i had figured. I will look into it more

 

[70]

just sounds strange that there is a 7mm increase in stroke, but you only increase compression by 0.6

The crank is different between the two motors, head design is slightly different and a few other minor points.

But yes, the US 1.8 liter pistons will fit and give the 9.7:1 compression ratio in the 2.0 liter motor.

 

[twilightprotege]

interesting

 

[akhilleus]

that works for me...Are there any problems i have to be concerned with in regards to using oversized rings? Any other issues? The ecu should handle up to 9.7 right? What gains should i expect?

 

[twilightprotege]

i cant see why the ecu wouldnt handle 9.7's because there are people going around with 10.4's in their p5. gains, not sure. i dont think it'll be mind blowing or anything, but 5-10whp with everything you've done i'd guess

 

[akhilleus]

actually from my research on this site i would need engine management to handle the 10.4 and 10.7. Even Tripoint, which races 3 proteges, told me the same thing. If i get the 9.7 i can take full advantage of the gains. I think mp3moose has hi-comp but he never noticed much gain and supposdly is havin problems.

 

[twilightprotege]

i guess you could always buy my ecu when i sell it sometime next year hehehehehe