Hi all,

I am sure that this topic has been discussed but I am about to begin the process of rebuilding my motor and I need to make a decision within the next few days.

Here are the options I am looking at.

At present I am going to run a GT35R with either motor and Tomei 280 Cams springs and retainers, but that could change if I go to a Stroker (maybe a TO4R).

2.3 Stroker Kit.

or

Rebuilt 2.0, with a rebuilt head.

Because of budget reasons I am not considering a 4G64 rebuilt block.

My understanding of the Pros and Cons of each from doing my research are the following.

2.3 Stoker Kit
Pros - Quicker Spool, More Torque compared to 2.0
Cons - Lower Revving, Less Durable compared to 2.0

Rebuilt 2.0
Pros - Higher Revving, More Durable compared to 2.3
Cons - More Turbo Lag, Less Torque compared to 2.3

At present I am a little more partial to the 2.3 Stroker but some of my thinking is this. If a Stroker spools about 500-1000 RPM quicker than a 2.0 but can rev to a max of 8000-8500 RPM and a rebuilt 2.0 with head work can rev to about 9000-10000 RPM then you would be on boost longer with a rebuilt 2.0. (The numbers I am throwing up here are based on my research and I could be way wrong, I would like to hear what others think of the numbers)

Cheers

 

There is no clear cut answer or everyone would buy one or the other, right? Have you ever been in a 125mph trapping EVO before? If you're goal is drag I would say 2L if it's more street car the better spool and TQ in the 2.3 is nice.

As far as turbos stay with a 30R, 35R, or 37R forget all of that other HKS rebadged crap.

 

If your going to drag the car i would go with a 2.0L for the higher rev's. If your just going to the track once and a great while and street race i would go with a 2.3L.


And as far as the motor setup being durable or not it doesnt matter what setup you go with if the motor is built the right way the fist time you wont have any problem's. If it is blue print the motor you wont have any problems what so ever. Now it is up to you to up keep your car. When you race or drive the car hard your always going to run the risk of brakeing something its a given. Even if you buy full out race parts and dont use them like they are ment to be used something will give at one point.

This is based on what you want to do and what your goals are with the car.

I say a 2.3L with a 35R will be just fine. But if you want to go with a 2.0L it works just as good but you will spool 700rpm later.

 

So if I understand correctly.

If my goal is to race the car down the 1/4 mile then going the high revving 2.0 is a better option.

If my goal is street racing and fooling around on the freeway then the 2.3 stroker is a better option.

 

Yes

 

cool. i think i am more interested in winding her out on the street/freeway with the odd evening down at the 1/4 mile track. so I am probably going to be happier with a stroker.

 

yea, I think 2.3 is the way to be, slap a big turbo on it, get the 2.3.... and have fun!

because now It spools before 3000

 

Strokers pick up 2~300rpm spool, not 700rpm. No one knows how long stroker cars can last and how the cyl. walls hold up due to the added loading put on them by the piston. The advantage is you don't have to rev the car and its superior street manners. 7500rpm max is about what everyone who builds a stroker recommends you make your rev limit. This is easier on the syncro's in your tranny as well since you aren't making high rpm shifts. A 2l can obviously rev higher and in the end, is able to support more power due to its superior ability to rev.

 

i also ran a 35R with the stock block for about 4k miles so i know how the car drives. ill try to explain it the best i could... with the 2.0 before the 35R screams its basically torqueless(sp?) with the 2.3 huge difference just driving around town without boost and the car actually moves in every gear...sort of like a V6. I keep hearing how fun a stroker is so i decided to get a 2.3 to see what all the hype is...im glad i did. I was running 26psi on the 2.0 and now im also running 26psi on the stroker..dam huge difference no BS. it really does push you back into the seat more and at the same time the car is much faster. seriously i was like dam now i know why everyone is going for a 2.3. back then with the 2.0 and 35R my evo felt like a new beast but now with the 2.3 its a monster and then some its so much more fun trust me. good luck with what you choose but for street and freeway's ill say get 2.3

 

what would be best for a road race prepped evo?

 

2.3L will better fit street driving because of the faster spool up time!

2.3L is on my list for the next mod!!!!

 

Bro check the Cosworth stroker kit. its 2.2 liter (similar to the JUN one) and personally that's what i will get and i decide to rebuild the engine... I know JUN strokers that rev 9K without problems...so i guess that the cossie one will be the same quality if no better...

 

You want the low end and area under the curve provided by a stroked motor.

 

If you choose the 2.3 stroker, I wouldn't expect the block to last many miles. The extra sideloading (caused by the longer stroke of the crank and shorter rods) on the cylinder walls will caused the cylinder bores to be "egg" shapped (oval). This has been a major problem for DSM 4G63 motors, and it is why the fastest 4G63 engines (Shepard and Brent Rau) are 2.0 Liter, NOT 2.3 Liter. However, they just drag race. For road racing the 2.3 liter is more ideal, but the block will NOT survive many miles of this type of abuse. The sideloading causes the rings to wear out faster, (causing premature compression loss, and then pistons and cylinder walls will also wear down faster than normal).

 

What's the max rpms we could push a built (rods, pistons, bearings) 2.0L bottom end???