2G Building a 2.4l hybrid need help.

[Chronogst]

Hi. I'm in the process of building a 2.4l into my 97 Eclipse GS-T. I've read thru the forums and i still need some info.

I know the 4g64 7 bolt came from a 95-99 Eclipse convertible and the 94-95 Galant. The 3g Eclipse with the 4g64 I'm still unaware of. Anyways, what 6 bolt 4g64 is there? I only know of one that's from the Hyundai Sonata 89 equiped with the g64b.

I would like to know what other cars came with the 2.4 6 bolt. Can I use the 4g63 rods in the 4g64? I've read that they're the same rods. I just wanna make sure that the extra 6mm deck height wont have any problems with clearance.

What pistons do I use for the 4g64? Anyone have part numbers? Any info would be greatly appreciated. Thanks.

-Mike

 

[hose101772]

Wiseco makes pistons for a 64 with a 63 head.Stock 6 bolt turbo rods work fine in a 64 6 bolt.Call www.importperformanceparts.com ,they sell wiseco.They had combo sets wiseco/eagle for $699 awhile back if you wanted a little stronger setup.

 

[Chronogst]

That link no longer works Do you know what cars the 2.4 came out of? Im gonna have Dss build me my 2.4 short block and they wouldent give me the names of the cars (trade secret). Do you know if anyone makes long rods? Can i use 4g63 pistons and rods for the 2.4?

 

[hose101772]

There was a post on here about destroking a 2.4 and using long rods.The guy had the right idea just had his measurements off a touch.As far as what they came in,pretty much any front drive older mitsu,hyundai that used 2.4.Indescript I know but just call salvage yards and ask them.If you could find a 156 mil rod you could use the 2.0 stroker pistons in a 2.4.Get a 1.56 r/s with stock 2.4 crank.ok app chart is here-www.remanufactured.com/Mitsubishi_Engines.htm that should tell you what you want to know.5/92 and older should be 6 bolts.

 

[Happy]

These questions i wanna know too????? Cause we are getting ready to do the same to!!
We want aknow what rods to use and what pistons to use??
As well is the the 2.4 crank allright?? It will be strong enough?? And will the 4g63 turbo fwd tranny bolt up to the 4g64???
As well one more question What should i go to to get the 2.4 out of??? A pt cruiser or a stratus or what?? Does it matter long as it is a 2.4??

 

[GrocMax]

Originally posted by hose101772
There was a post on here about destroking a 2.4 and using long rods.The guy had the right idea just had his measurements off a touch.

Might want to review your measurements as well, Sir.

 

[Chronogst]

I really didnt want to build a stroker motor i just wanted to build a 2.4 motor with strong internals. I will need the extra displacement to spool my T-66. Any know if theirs a manufacturer that makes long rods (around 156mm rod length) like pauter or eagle? I dont wanna wait months for custom rods. Also, s 1000 to much for machining?

 

[hose101772]

Originally posted by GrocMax


Might want to review your measurements as well, Sir.

Ok,maybe you could inform me as cant find the error in my logic.The only thing I see that might be misleading is the stroker 2.0 pistons.I am saying the 2.0 stroker C/H,which is available in 86.5 mil which fits a 2.4 block.

Might as well explain this now.2.4 has 6 mil taller deck than 2.0 .A 2.4 crank will fit in a 2.0 while using stock rods.If stock C/H(compression hieght)2.0 pistons are used they would poke out the deck by the half of the difference of the stock stroke(88) and the 2.4's stroke(100).Now that dont work so to make it work shorter C/H pistons have been made,the pin is moved up towards the crown by roughly 6mil.

Ok,so now we have 29mil C/H pistons available vs the 35mil stock,in a bore size that will fit a 2.4 block.With the 2.4 block being 6mil taller to take into account for half of the 12mil stroke increase over 2.0 while using same spec parts as 2.0-i.e-rod length-same C/H pistons.If we use the 29mil C/H piston we will come up short--right,but if we use the a longer rod to gain back the 6mil we lost on the pistons we are in the same spot.Hope I havent lost anyone here.

So now lets look at the R/S(rod length to stroke) ratio.Stock rods are 150mil,stock 2.4 stroke is 100mil,if we do the math we get a 1.50 R/S(150/100).Using a 156mil rod,6mil longer than stock,we would get a 1.56 R/S(156/100).

Would that increase in the R/S be worth the huge dollars for custom rods,probably not.Would it be in the rods were already made and not much more than standard length,yea.

So there is a review of my measurements.Wheres yours?

Almost forgot--

 

[n2o4fun]

I have the answer for all your questions about building a 4G64. Call Marco and place an order.

 

[Chronogst]

I was reading about the 4g64 hybrids and i wanted to know if the 3g Eclipse 4g64s are the same as the mid Galant and Eclipse Spyder 4g64s?

I'm planning on doing the 4g63/4g64 swap in my 97 Eclipse GST and i was wondering if the 3g 4g64 was the same as the mid Galant and Eclipse Spyder 4g64s?

I've read on a forum that its edges are more rounded off but doesn't say exactly that it would fit. i just wanna make sure it fits.

Please let me know before I invest into a mistake. Thanks.

-Mike

 

[allwheelTSI]

i never been under the hood of one,but someone told me it was another backwards motor.

 

[TurboAWD92GSX]

your best bet would be an evo 5 and up type motor that spin the other direction. that would probally be your best bet. heavent seen it done yet so go ahead and pioneer something.

 

[Chronogst]

i was able to examine both motors the spyder eclipse and the 3g rs eclipse and both 4g64s look identical. Both motors are mounted tranversly with the trans on the right side. Does anyone know exactly if their the same?

 

[Chronogst]

Ive read thru the threads and didnt see this discussion come up. If displacement is deterrmined by bore and not stroke, Is it possible to bore out a 4g63 from 85mm to 87.5 mm 4g64 and get the same 2.4l displacment? My 2g is under way and needed some info. I would like to use the 1g 4g63 to accomodate my stock length (150mm) crower rods and not have the 150/100mm problem with the 4g64. Any info is greatly appreciated. Thanks.

 

[dsmturboawd]

2.0 to 2.4? if thats what youre asking, sure it maybe could work. most dont go more than 2.3, and im sure thats for good reason.

from what i understand stock 7 bolt rods will work perfectly in a 4g64. since those rods also work in a 6 bolt....

 

[nc_99_99]

Yes you can overbore to 4g64 size. This will not get you 2.4l though. You will be closer to 2.1l. The 4g64 gets most of its extra displacement by increasing the stroke by 1.2mm(.5in). Good luck man

 

[leet]

Originally posted by nc_99_99
Yes you can overbore to 4g64 size. This will not get you 2.4l though. You will be closer to 2.1l. The 4g64 gets most of its extra displacement by increasing the stroke by 1.2mm(.5in). Good luck man

He means 12mm.

 

[nc_99_99]

He means 12mm

Thanks, should have said 1.2cm. One thing that I could have added is that the 4g64 block is 6mm taller to make all of this possible.

 

[Chronogst]

If i were to use a 4g63 block with a 4g64 crank (2.4l) that will get me a 2.3l displacement. Now how much do i have to bore it out to make it 2.4l. Btw, I know the 4g64 has a 6mm taller deck height but I believe stroke has nothing to do with displacemet.

 

[nc_99_99]

If i were to use a 4g63 block with a 4g64 crank (2.4l) that will get me a 2.3l displacement. Now how much do i have to bore it out to make it 2.4l. Btw, I know the 4g64 has a 6mm taller deck height but I believe stroke has nothing to do with displacemet.

Ok, here goes. The 2.4liter gets .3liters of its extra displacement from the stroke, and .1liter from the extra bore. I hope you know you will need custom stroker pistons in order to put a 2.4liter crank into a 2.0liter block. If you just slap in your current pistons and a 4g64 crank your pistons will be into your head by 6mm. The stroke has everything to do with the displacement, that is why a 2.4liter is called a stroker by most. Good luck

 

[Chronogst]

I havent ordered my pistons yet because i have not decided yet to go with the 2.3 stroker or 2.4 block. I already have my rods in. Their stock lenghth (150mm) Crower rods. Which would you recommened? Im going all out with my 97 gst. My head is 1g fully raced with dual valve springs, 1mm oversized stainless steel valves, race grind camshafts etc. Im gonna utilize a 60 trim T66 turbo.

 

[RipperXX]

Let me make sure I understand this as I was thinking about a 2.4L engine when I ever get my project started.


So all you basicly have to do is take a 4G63 block, put a 4G64 crank into that block, boar it out x amount for an aditional .1L use the same stock rods, and custom pistons which are 6mm shorter? And you end up with a 2.4L 4G63?

If that is the case and it's not extreamly hard to do fug spending 10grand on a 2L block.

But wouldn't you need a turbo at least biger than a 20g for something like that since it is 20% more displacement?

 

[DCJ98GST]

Ok,maybe you could inform me as cant find the error in my logic.The only thing I see that might be misleading is the stroker 2.0 pistons.I am saying the 2.0 stroker C/H,which is available in 86.5 mil which fits a 2.4 block.

Might as well explain this now.2.4 has 6 mil taller deck than 2.0 .A 2.4 crank will fit in a 2.0 while using stock rods.If stock C/H(compression hieght)2.0 pistons are used they would poke out the deck by the half of the difference of the stock stroke(88) and the 2.4's stroke(100).Now that dont work so to make it work shorter C/H pistons have been made,the pin is moved up towards the crown by roughly 6mil.

Ok,so now we have 29mil C/H pistons available vs the 35mil stock,in a bore size that will fit a 2.4 block.With the 2.4 block being 6mil taller to take into account for half of the 12mil stroke increase over 2.0 while using same spec parts as 2.0-i.e-rod length-same C/H pistons.If we use the 29mil C/H piston we will come up short--right,but if we use the a longer rod to gain back the 6mil we lost on the pistons we are in the same spot.Hope I havent lost anyone here.

So now lets look at the R/S(rod length to stroke) ratio.Stock rods are 150mil,stock 2.4 stroke is 100mil,if we do the math we get a 1.50 R/S(150/100).Using a 156mil rod,6mil longer than stock,we would get a 1.56 R/S(156/100).

Would that increase in the R/S be worth the huge dollars for custom rods,probably not.Would it be in the rods were already made and not much more than standard length,yea.

So there is a review of my measurements.Wheres yours?

Almost forgot--

Why is the Longer rod to stroke ratio better?

 

[DCJ98GST]

Going to answer my own question because I found the answer here:

http://www.swordfishgsx.8m.com/photo4.html

"A longer rod reduces peak piston speeds slightly and delays peak piston velocity until the piston is further down the bore, which gives the intake valve more time to open more resulting in better cylinder filling. By delaying peak piston velocity, even if it's only 1 or 2 crankshaft degrees, it can allow the valve to open a little more before peak airflow demand is reached. I could go on and on but I'll just list a few more advantages straight away. Higher wrist pin location, more detonation resistance, less rod angularity, less intake runner volume is needed, less peak piston velocity, piston velocity is later in the down stroke resulting in better leverage on the crank for a longer time, it allows for slightly more compression to be run in a given application, less ignition timing is required and piston rock is reduced. "

 

[swordfish]

Whoa, I need to fix that. Right at the bottom in that paragraph is should say "MORE" ignition timing is required. Its less for domestics but more for us. Base timing on my long rod 2.4L is 10 degrees. The long rod strokers like a lot of timing.

I'll edit that tonite if I get the chance.

jeff