Go ask Sean Ivey what motor he runs .

2.1L + 10:1 is very possible with boost. With that high of a compression you don't NEED crazy boost. For example:

1.) The 2.1L already has more displacement than a 2.0L. So boost for boost, compression ratio vs. compression ratio, the 2.1L will outflow the 2.0L given the same turbo and relatively same sized head/head ports.

2.) Now given that info, raise the compression and you dont HAVE to run high boost, you can make relatively the same kind of power on lower boost.

3.) Given the rod anglularity of a 2.1L *longer rod, "shorter piston"* you can rev it higher without problems of the piston getting stuck on the bottom "skirt" of the block -problems 2.3L have. Also if you deck the head and place the proper headgasket, your chances of the piston hitting the valves is nearly extinct.

Now take that 2.1L with 10.0:1 c/r and put a HIGH flowing head and you have practically a Honda on steroids. Tell me how 2.1L + 10.0:1 c/r isn't efficient.

Also, I understand your POV in that, that high of a compression ratio will not work well with pump gas and it'll detonate/preignite, but with the proper fueling and tuning it's very possible to run daily.

 

Thats exactly right, took the words right out of my mouth

 

A '2.1L' 4G64 is 72cc larger than a 2.0L 4G63. That amounts to a difference of 3.6% - hardly enough to write about.


This is a misconception, and is incorrect. Compression is not a substitute for boost. Increasing boost increases the air mass being processed by the engine. Greater air mass = greater power. Increasing compression does not increase air mass, only how hard the mixture is being squeezed. An increase in compression by one full point (e.g. 9:1 to 10:1) typically increases off boost torque by ~5%, but the tradeoff in the reduced boost pressure the higher compression motor can tolerate creates a much larger reduction in power potential.


AFAIK, the 2.1L does not employ a shorter piston than a 2.0L 4G63, but it does use a 6mm longer rod.

 

The rod just sits higher inside the piston making the pivot point higher up.

 

One can spin a 2.3L 4G63 as high as his pockets are deep.


Gearing is a key factor in this discussion. Gearing is what makes a 2.0L engine better suited for drag racing. Change the gearing, and change the determining factors in the discussion.


What I am iterating here is the same qualities that make the 2.0L EVO the desired setup for drag racing apply to 'highway runs'.


A 2.1L is a 2.0L crank in a 4G64 block, so the stroke is the same. The bore is only slightly larger, but the rod/stroke ratio is a little more favorable to high rpm efficiency.

 

If the rod is 6mm longer to make up for the 4G64's 6mm increase in deck height, the piston pin position is the same as the 2.0L.

 

should we also take into consiration that the stock tranny hates to shift at higher rpms......????

 

I know 98 octane here is the same as 93 octane in the US Besides myself there are quite a few people boosting 2 bar on pump gas. AFAIK im the only person running meth in this country....also race gas is illegal here.

The stock tranny should be fine shifting at 8k I hope since I dont plan on going higher than that anyways...

 

I think the rod length of the 2.1L is 162mm. That is 12mm longer than the stock rod which is 150mm. Or do I have the stock rod length wrong?

link to SBR site for the 2.1L destroker kit
http://www.slowboyracing.com/shop.ph...74ed55cfff34e5

 

If you don't rev past 9.5k,then go to 2.3.Spin 2.3 to 8k is ok.If you want to max out your GT35R and high rev than 2.0,go to 4G64 and use SBR Destorke kit,this could make you spin to 10k .For tranny,ask Shep or TRE.

 

Here we go again with the 10K nonsense.

 

Yes, I wish those who promote such practices would dare step forward to guarantee their advice with a blank check.

 

the kid is 12 years old

 

I think its a no brainer... 2.3L. We're talking about highway runs and what better example to go buy than the black AMS EVO? GT35R, 2.3, 8k redline (not too crazy) and you saw what it could do.

Take it a step further and add the ShepRacing 4.11 final drive upgrade (made specifically for strokers) and youre all set. Even if your racing from 5k, the stroker is going to spool better and pull harder most of the way. I know a 2.3L is headed my way someday...

 

with 35R turbo... hows the turbo lag comparison between 2.1\2.2\2.3L ? will it be the same ?

some say with the 2.3L it reduces the lag of about 400rpm, but will this be the same as the the other stroker ?