G54B pistons in ka24e?

[bec1488]

I've been trying to find detailed information on Deviouska's high comp. KA-E setup with no luck, and he doesnt seem to be active on the forums anymore. Does anyone know the specific pistons he was using (part numbers would be a plus) and what machine work exactly was neccesary? Thanks for your time.

[Nismo-240sx]

You're not the only one searching, I've been searching here for months and no response, I've been posting at 240sx section... if you found something, please send me an email

[Thursday]

it requires a 91.1 mm over bore and the piston skirts need to be ground a bit to clear the counterweights of the crank.

[Nismo-240sx]

does the piston deck needs machining or it won't hit the head with that bore? and any advise of how much and were does the skirt need to be machined...

stock machined rods? what about the block walls, still strong enough? final compresion achieved?

I know to much question... but I really wanna do this proyect

[Nismo-240sx]

[neverlift]

that guy only comes thru once in a moon,member since 05 with 29post. give it time bump it once in a while

IIRC once you get the block bored to that(well 92mm IIRC) you start to get into those kinds of problems about the wal strength.

get to it ,dont wait assemble it and slowly hand crank it to see if anything comes up.... repeat...

[Nismo-240sx]

BUMP...

[AelSic]

He had it posted about a year ago. Does the search for his name not go that far back now? I tried but it gave me about 15 post.

[bec1488]

If anyone actually goes about assembling one of these hybrid setups post it up, I'd be interested to see how it turns out. I gave up on trying to find solid info, just ordered a set of Wiseco 10.5:1 CR forged pistons.

[Nismo-240sx]

I'll try to build the setup, no budget by the moment but I hope that on June I'll start studing whats neccesary... If I finish it and it runs, I'll post it...

p.d. I'ff anyone can make this easier for me by posting solid info, I'll still be waiting

[deviousKA]

This is an old post, but it seems as if I better clear a few things up.

The pistons in question are not the starion pistons specifically, but rather the similar G54 engine available in the chrysler/dodge minivan (and perhaps early model mazda b2600).

The starion pistons have dish volume, designed for the turbo application. The truck/van version of the engine has flat top.

Besides the necessary bore size of 91.1mm, there are a few other necessary modifications.

Both the piston skirts and the piston top edge must be clearanced so that there is no interference between combustion chamber edge or crankshaft counterweight.

KA rods, piston pin end, bushing must be honed to 22mm and pin must be press fit.

Final static compression ratio falls in at about 10.7:1 with a displacement of 2502cc.

This is not in any way something that should be tackled by a beginner. I would not recommend this for anyone that is not a machinist themselves, or otherwise one who can discuss modifications with a machinist, one who is willing to work on custom application.

The most difficult, or should I say uncommon modification required is the chamfering of the piston top edge to clear the combustion chamber/headgasket. This must be done very carefully on a lathe.