I was wondering how much more compression you could get with milling the head and maybe getting a thinner HG. Iam wondering if any n/a guys have done this yet? also, what is the most whp anyone had gotten n/a? I either want to go all-out n/a or just turbo.

 

good question - we are working on some things to try and make some NA power - we are just curious as to how much we can make - coming from a honda background we are using the tips and tricks we have learnt from building honda engines for the past 5 years with the tC

will be a bit of work and a bit of time till will we have any dyno #'s for comparison but we are working on some things

this engine should have some potential - it being relatively large, 2.4l for a 4 cylinder will definately make some good torque #'s - just a question of how high it will be able to be revved to make that peak HP # and of course trying to figure out what to do with the camshafts and the vvti system

 

i'm doing the head swap soon with an emanage install + tune, alphawerks 4-1 header, cc s-pipe, and custom exhaust.. you'll probably want to watch my ZPI Stage 1 Head thread in power hungry...

 

james, I was thinking the same thing. its all about a high it can rev. I come from a srt4/neon backround and they build those 2.4s up to ~200-240whp on pump gas. Its all about

VE*RPM*DISPLACMENT/3456.

 

The angled squish area in the 2AZ is unique and will create some problems for convention methods of raising compression.

I'd be more inclined to ensure the deck height is right, then go after the head, but whatever you do, be absolutely certain to check your squish. It's not simple like most engines, Toyco chose to angle it so the gases from the squish areas follow the roof of the combustion chamber, not the floor as everyone else has done for many years.

Look on page EG-7 of the New Car Features book (NCF264U) for details of this concept and why milling and decking the 2AZ is a little more complicated than most engines.

 

we just ordered some cp 11.5:1 compression pistons, .5mm over

those with a p&p job

and working on some intake manifold ideas

should be a nice little street engine that can run on pump gas with no issues

camshafts are still on the list to be checked out as well as a/f and timing control - probably use a camcon for the time being until we can figure out something that will give us a little more control over it all

 

email sent about pistons.......

 

Thanks lo_bux, I haven't even seen the head off car ill have to check it out.

 

Oh yeah, to answer your question about combustion chamber volume, if you assume the engine really has 9.6:1, and we know the cylinder's swept volume is 590.54cc, then the combustion chamber total volume (including headgasket piston and dome/dish) must be 68.7cc. If we know how thick the headgasket is when compressed, we can subtract that, but after doing these calculations, you have to do some measurement on the head and the piston dome (or dish) to get the exact final numbers for blueprinting.

 

where did you get the pistons at?plmk

 

send him a PM

 

well, Bump for this? Got a good N/A tC? Do you know Deck Height?

 

How about an update on this? No luck on this side?