Rebuild 1G N/T with Stock Turbo "upgrade" to 400HP

[Czt]

I bought this Eclipse as a '92 GS and made it a '92 GST, kindof. The things I installed:
(all stock DSM parts)
1G Turbo
Exst Manifold
Oil Pan
MAS but not the airbox
Intercooler & Air Hoses
Oil Lines
Turbo Watercooling pipes

Things I wish I'd installed:
Oil Cooler
Oil Filter Housing
Throttle Body (garage mod on the N/T body to get the new hose to fit)
ECM (couldn't get one at the time)
Wiring Harness
A freaking boost gauge
Fuel Pump
T Fuel Injectors
T Air Box
EGT Gauge

Ok. Now the engine has a hole in a piston, and proably some bent valves. Basically, I want to follow the Turbo 1G path to 400HP, but I have qualms about the high compression ratio. Should I use a stroker kit to lower compression/increase CC? I know the engine needs some major $$, but once I get fuel management, manual boost control, etc. it really doesn't matter that it's not a stock turbo, right?

 

[ItsStockOfficer]

I have no idea what makes you thik that a stroker kit changes the compression ratio. Honestly, come on now, think before you let the gibberish out.

 

[kpt4321]

Depending on what parts are used, there is no reason a stroker kit couldn't change the compression ratio.

....Kyle T.

 

[ItsStockOfficer]

Originally posted by kpt4321
Depending on what parts are used, there is no reason a stroker kit couldn't change the compression ratio.

....Kyle T.

This is obviously true but a stroker kit's purpose is not thus, and he would be going way out of they way to accomplish a far more simple goal.

 

[NosLaser]

ItsStockOfficer,

Are you sure you completely understand what compression is? Perhaps you should stay out of the Extreme forum until you at least get some basics under your belt.

Regards,

 

[ItsStockOfficer]

Are you sure you understand the purpose of stroking an engine? Its merely to increase displacement and compression ratio has nothing to do with it. If you think that its purpose is to change compression, perhaps you should stay in the newbie forum. Of course you pick your compression in the process of stroking an engine, but that doesn;t change the fact that CZT probably misunderstood stroking and if hes really interested should seek further knowledge. Now if you want to follow me around and be annoying based on the technicalities in my post, I hope you enjoy yourself.

Im just trying to prevent him from setting himself on fire because he's cold. He has the same rods as any 6 bolt and some 1G or 2G pistons would have him running and ready to go in 2 weeks for a minimum of expense.

Sean

 

[NosLaser]

Alright, here we go again. Since we are in the Extreme forum, let's not just look at why we stroke an engine, but what happens when we stroke an engine, shall we?

...I have no idea what makes you thik that a stroker kit changes the compression ratio...

Did you or did you not make this statement? This would lend one to believe that you really don't know how stroking a motor changes the compression ratio do you? When you stroke a motor, you can really do one of two things. First, in most cases you'll be increasing bore size which by itself can affect compression due to more volume. The main change, however, is going with a longer stroke via a longer rod in a custom block with an increased deck height, or via a longer rod with the wrist pin on the piston repositioned to allow a longer stroke. When you lengthen the stroke, you are creating more cylinder fill, however you are not changing the combustion chamber volume. Let's think about this for a second. Same combustion chamber volume, but more cylinder volume. Aha!!! The air has to be further compressed in order to stay in the cylinder and not blow past the head gasket/valves/what have you, therefore your compression ratio is increased. You only came into this thread to try and bash the original poster by making yourself sound like a know it all, when in reality, you really don't know what you are talking about.

Regards,

 

[ItsStockOfficer]

IM not going to argue this point in this forum, because, quite frankly, I do know all of this.

My original point was to make the original poster look further into stroking an engine for the sole purpose of changing his compression ratio. because, it's silly. You know it too. So get over yourself, your vaguely intelligent but aren't saying anything impressive or that needs to be said.

as I said

"This is obviously true but a stroker kit's purpose is not thus, and he would be going way out of they way to accomplish a far more simple goal."

Now, do you recomend we let him know what stroking is intended for, or do you think we should recomend stroking as a path towards the single goal of lowering his compression? How are you being useful?

Sean

 

[500hptalon]

Holy Crap! Are you not even listening to what ItsStockOfficer is saying!?! The reason or purpose in getting a stroker kit is not simply to change your compression, its to gain more displacement. If you want to get technical about whether or not stroking an engine will change you compression, why don't I get technical with you? What’s going to happen to your compression when you throw a stroker crank in their and ignore the pistons and rods (the way successful tuners change compression)? Give up? You'll have NO compression! Your longer throw crank is going to push your pistons right into the head and either blow a hole in the head or snap a couple rods!

Czt, if you want to lower your compression, get some pistons. Stock 1g or 2g will do nicely for a cheap upgrade or go forged for nearly foolproof protection. Stroking your engine will involve getting a stroker crank, maybe rods and the pistons (no cheap stock option anymore) that you needed to get anyway and you'll be stuck with possibly more difficult tuning issues than you already have.

 

[kpt4321]

Holy crap, you're not listening to what NosLaser is saying.

Whether or not the intention of stroking is to change the compression ratio (which it obviously is not), it is VERY possible that it would.

Itsstockofficer's first comment said that a stroker did not have an effect on compression. This is dead wrong. NosLaser proved that.

Why would you use a stroker crank without changing the rods and pistons? Obviously that would cause major damage, but I don't even see how that scenario is relevant here.

Have fun with your "500hp" 14 second car.

...Kyle T.

 

[NosLaser]

Holy crap! You know, if you were driving your car around the rim of a volcano full of liquid hot magma, and then your car slipped and fell in, do you know what would happen then? Huh? Do ya?? Give up??? Your car would burn up smart guy! It would melt because lava is like really really hot! Yeah, you think you're so smart, but you didn't know that, did you?? And then, you know what happens to your compression after that? Give up? You'll have NO compression because your motor will totally melt and stuff, and you won't even have cylinders to make compression anymore! I'll bet you wish you didn't get so technical on me, because I got way more techical right back on you! Ha!

Regards,

 

[98TsiAWD]

Originally posted by ItsStockOfficer
IM not going to argue this point in this forum, because, quite frankly, I do know all of this.

My original point was to make the original poster look further into stroking an engine for the sole purpose of changing his compression ratio. because, it's silly. You know it too. So get over yourself, your vaguely intelligent but aren't saying anything impressive or that needs to be said.

as I said

"This is obviously true but a stroker kit's purpose is not thus, and he would be going way out of they way to accomplish a far more simple goal."

Now, do you recomend we let him know what stroking is intended for, or do you think we should recomend stroking as a path towards the single goal of lowering his compression? How are you being useful?

Sean

A stroker can very well throw your comp. ration all off.

Now can we keep this ontopic instead of arguing.

 

[Tevenor]

When you increase displacement and keep the same combustion chamber size, the compression ratio is most certainly altered. More air + same "squish" area = higher effective compression. Why do you think stroker motors/2.4l motors spin up turbos faster? Just cuz? The purpose is most definitely to get more air through since it is nothing more than a giant air pump. However the change in compression is still a huge part of building a stroker and is not insignificant.



Aslan and Sean: Now, if the two of you can't discuss topics rationally, I will start deleting every single post of yours that is an ANY WAY confrontational. Regardless if you are absolutely right or positively wrong. I don't play favorites and I will delightfully delete either of your posts with glee if you don't pop both your heads out your asses.

 

[NosLaser]

Noted. Head removed from behind.

Regards,

 

[ItsStockOfficer]

Yeah, I didn't actually disagree with anything Asslan said, just his intent. Ill try and play nice.

Regards,

 

[98TsiAWD]

Originally posted by ItsStockOfficer
Yeah, I didn't actually disagree with anything Asslan said, just his intent. Ill try and play nice.

Regards,

Then quit saying "Asslan"

 

[hose101772]

Originally posted by NosLaser
, because I got way more techical right back on you! Ha!

Regards,

Did someone delete that post or atleast the technical part?I was looking but I could'nt find it.

 

[pneumo]

No, that was the post, You have to understand Asians sense of humor. Personally, it cracked me up! Thanks for keeping it lively, guys!

 

[pneumo]

Oops! I was supposed to start that post with "Holy Crap!"