Ok,this may be a stupid question,but I was wondering a few things about the RA vs Evo8..Aside from the fact that the evo’s awd,and turbod, its a smaller engine correct? The ra is a 2.4l.So what the main diff in the engine?could the Ra be built up faster than the evo?

 

an RA with a turbo like the Evo is a beast or can be.

 

i believe the compression ratio isn't as good on the 2.4.. and internals are weaker. but, you're asking if it could be "built up".. so i'm assuming you'd change all that.

someone please chime in? this is a good question..

how bout a side by side comparison...

 

MIVEC for one. Internals for another. Both are good. Bigger displacement always helps. Traction will always be a problem for the ralliart

 

Im saying if you port/polish the manifold,bore out the pistions,turbo,cai,full exhaust,add new rims (lighter ones) and low pro tires, what would you be lookin at?can you change the gearing in the RA to make it faster?

 

All else aside (awd, stiffer chassis, suspension, brakes, etc)......If you go engine vs. engine, you are talking about a proven winner in the 4G63, wheras the 4G69 is new and unproven as of yet. Would be interesting to see over time how well the 4G69 compares. I'm sure if you put a turbo and IC on the 4G69 and shore up it's internals (rods, camshaft, pistons, etc.) so it can take an ungodly amount of boost on a consistent basis, it could be just as good an engine if not better than the 4G63.
But then again, the 4G69 is a new engine and not many people know what it can really do.....yet!

 

I haven't seen the inside of the 4g69, but the 4g63 is an engineering masterpiece. Granted, it's starting to get dated, but all the essentials are there: beefy bottom end, good flow on the cyl head, big bore/short stroke config ideal for high rpm abuse, the list goes on. The '69 is a newer design, it of course has the MIVEC valvetrain and all the new goodies, but the stroke is a long-ish 100mm with a relatively small bore, so it would be more difficult to live through constant high rpm operation. It's also only a SOHC which hurts it's maximum tunability, but nonetheless it looks like a good candidate for some modification. Overall I would say the '63 is still the beter motor.


...Now when the Evo IX or X comes out with a 2.0 DOHC MIVEC, whoo boy...

 

wondered how long it would take 'nutter to chime in!

I have been hearing that the SOHC really is no big deal since there are still 4 valves per cylinder......am I misinformed? Not too sure if that is true or not??

 

DOHC is simply easier to tune. With dual shafts, you can (for example) vary the intake and exhaust openings depending on your individual system. It just gives more tuneability.

 

well the SOHC isnt too harsh, may cost it a little but not enough. The man deal I think would be the compression ratio. you would want to lower it to accommodate boost better and safer. I would think the bottom end is pretty solid, but could be a little weak since no boost is targeted at this motor from the factory.headwork etc, this engine turboed could put out some incredible power, more than some Evos, and especially stock ones

 

https://www.evolutionm.net/forums/sh...ght=turbo+tech

RA's internals are ready for boost and are not like the lil ***** @ss ones that are in the 4g94...
as some have said...guess what you biggest problems is? especially with 300+whp?

traction

having DOHC isnt better than SOHC...DOHC just has more tuning capabilitites, instead of SOHC where you hvae one cam and have to decide which end would you rahter give up

the 4g69 is basically the 4g64 with mivec...and the 4g64 has also been aorund for awhile with proven reliability and power

 

Exactly. That, and the rocker assemblies are lighter weight in a DOHC setup, so they can rev higher. For a mild to moderate street or street/track setup, it's not a necessity however. Realistically, if you're trying to go for really high HP (over 300) you're in the wrong car - go get an Evo. 300+ hp in a FWD isn't very managable for anything but a drag car, go ask the tuned SRT-4 boys.

I am a bit of a loudmouth, ain't I?

 

well it sounds like someone needs to throw down some $$ and try some stuff here...

 

you RA guy will see some fast times soon as the first 3 RRM turbo kits are already bought/ spoken for...so we'll see how it performs soon..hell there even a guy in nor cal ( sweet_bucket22) thats gonna be in the the 13's soon, with his N/A setup

 

Yup, a full-interior streetable N/A 4cyl in the 13's is nothing to scoff at!