4g64 crank question

[dsmjay]

im getting ready to tear down my engine to find out what is wrong with it. i figure im going to check the crank to see how much play it has...if it has alittle i was wondering if i could just replace the stock 4g63 crank with the 4g64 crank. i know that this is the stroker crank that everyone uses in their 2.3 stroker kits. my questions are these...can these be used with stock pistons/rods. has anyone done this before and how has it worked...

you guys are great i appreciate the help.


J

 

[dsmjay]

nobody will help me out here?

ive searced for awhile now and i cant find where anyone has tried to do or done what i want to do...come on guys

 

[Cesar]

I think it can be done with 6 bolts. Not 7. I think.

Now, rods can be re-used. The pistons are different.

Try a search.

 

[GSX_Dan]

I am thinking the piston would smack into the valves since the crank has more stroke. From what I read they use the same rods, just custom pistons.

 

[dsmjay]

are the pistons that much taller than the factory ones? keep the replys coming guys

 

[blue1]

It sure will hit the head with the pistons,

 

[gixrman]

I think it can be done with 6 bolts. Not 7. I think.

Now, rods can be re-used. The pistons are different.

Try a search.

The 4g64 crank must match the motor i.e. 1g4g63 needs a 1g 4g64 crank 2g 4g63 needs a 2g 4g64 crank, you can swap but then you will need to change your flywheel. And yes you will need aftermarket pistons. If your going though that much trouble might as well get a 4g64, or 4gcs and put it in there.

 

[4wd-Eclipse]

...can these be used with stock pistons/rods. has anyone done this before and how has it worked...
J

You can only use the 63 rods with 64 crank in 63 block, the pistons must be CUSTOM made but it's availble.

I have just installed my 2.3 stroker shortblock from SBR.... still in brake-in.

 

[Lunch_Box]

The 4g64 crank must match the motor i.e. 1g4g63 needs a 1g 4g64 crank 2g 4g63 needs a 2g 4g64 crank, you can swap but then you will need to change your flywheel. And yes you will need aftermarket pistons. If your going though that much trouble might as well get a 4g64, or 4gcs and put it in there.

I don't think you can put a 6 bolt 2.4L crank into a 7 bolt block and vice versa. Like everyone has said you can reuse the rods but not the pistons.

 

[red91gst]

You must keep the same crank with the motor. 6-bolt stroker crank with a 6-bolt block and visa-versa. The main bearing journels are different.

In your case you could use a 7-bolt 4G64 crank, but you will need a custom set of pistons. Wiseco actually stocks a set of stroker pistons. The piston itself is shorter and the pin is offset. I would also be leary of using a stock rod with a stroker build as the rod ratio is not the best for a 2.3. This is why we dont offer a stock rod stroker motor. 4G64 7-bolt cranks are actually readily avalible right now, unlike the 6-bolt version.

Nate
SBR

 

[igopoopy]

i thought

4g64= 7 bolt
4gcs(aka 4g64)= 6 bolt

 

[red91gst]

i thought

4g64= 7 bolt
4gcs(aka 4g64)= 6 bolt

They manufactured 2 versions of the 4G64 motor, a 6-bolt and a 7-bolt, much like the 4G63. The older version, found in the Elantra, Summit, Expo, Mighty Max, etc etc is the 6-bolt. Most post 92 4G64s are 7-bolt, including the newer Galant/Eclipse 2.4l.

Nate
SBR

 

[igopoopy]

so i was right then ok
thank you Nate

 

[dsmjay]

thanks for all the help guys i appreciate your knowledge. I always like getting nates opinions on stuff because he actually knows what hes talking about.

thanks guys

 

[Batty200]

Also you have to clearance the block with a 64 crank in a 63 block.

Also the Rod/stroke ratio on a stroker or a 4G64 is exactly the same since they use the same rods factory.


Later

 

[gixrman]

The 4g64 crank must match the motor i.e. 1g4g63 needs a 1g 4g64 crank 2g 4g63 needs a 2g 4g64 crank, you can swap but then you will need to change your flywheel. And yes you will need aftermarket pistons. If your going though that much trouble might as well get a 4g64, or 4gcs and put it in there.

ups, my f-up thinking about motor swaps, disreguard crank swap info.

www.karking.com has some 4g64 stock motors for cheap.

 

[red91gst]

Also you have to clearance the block with a 64 crank in a 63 block.

Also the Rod/stroke ratio on a stroker or a 4G64 is exactly the same since they use the same rods factory.


Later

Actually, rod ratio IS different between the 2.0 and the 2.3, I did not say rod/stroke ratio. Think of rod ratio as the angle in which the rod leans when the crank is at the outermost part of the down stroke and the outermost part of the up stroke. The angle of the rod in relation to the bore directly relates to the rpms you can run and the load on the rod. The more of an angle, like that of a stroker crank, creates more force on the rod itself. The less of an angle, like a destroked 4G64, allows for more rpms and less force on the rod. With the greater amount of force being applied to the rods when a 2.0 is stroked to a 2.3m I would not recommend a stock rod stroker.

Nate
SBR

 

[Batty200]

Actually, rod ratio IS different between the 2.0 and the 2.3, I did not say rod/stroke ratio. Think of rod ratio as the angle in which the rod leans when the crank is at the outermost part of the down stroke and the outermost part of the up stroke. The angle of the rod in relation to the bore directly relates to the rpms you can run and the load on the rod. The more of an angle, like that of a stroker crank, creates more force on the rod itself. The less of an angle, like a destroked 4G64, allows for more rpms and less force on the rod. With the greater amount of force being applied to the rods when a 2.0 is stroked to a 2.3m I would not recommend a stock rod stroker.

Nate
SBR

So then you wouldnt recommend a stock rod 4G64 either? If that is the case then fine but I have heard many people say rod ratio on a 2.3 is different than a 2.4 and it is not. I also do know a 2.3/2.4 cant quite rev as high as a 2.0 but it doesnt need to since it makes more power with less revs.


Later

 

[red91gst]

So then you wouldnt recommend a stock rod 4G64 either? If that is the case then fine but I have heard many people say rod ratio on a 2.3 is different than a 2.4 and it is not. I also do know a 2.3/2.4 cant quite rev as high as a 2.0 but it doesnt need to since it makes more power with less revs.


Later

Yes you are correct. Rod ratio would be the same in the 2.4 and 2.3, same rod, same crank. Only difference is deck height and piston. I still would not build a stock rod 4G64 for any big power because of the same rod ratio. Yes, the 2.0 can rev much higher but the 2.3/2.3 make up for the rpms with displacment. This also helps our dsm trannys by shifting at lower rpms

Nate
SBR

 

[Batty200]

Yes you are correct. Rod ratio would be the same in the 2.4 and 2.3, same rod, same crank. Only difference is deck height and piston. I still would not build a stock rod 4G64 for any big power because of the same rod ratio. Yes, the 2.0 can rev much higher but the 2.3/2.3 make up for the rpms with displacment. This also helps our dsm trannys by shifting at lower rpms

Nate
SBR

Def true and I am a whole hearted believer but I am forced to build a 2.0 liter for now so I will have to rev the piss out of it. The really cool part is when street racing just hit 3rd and wrap the thing out to 9k and never have to shift I dont race past 120-125 anyhow. Thats is my only thing I love about a 2.0 is the "longer gears" higher rpm give ya.


Later

 

[red91gst]

Def true and I am a whole hearted believer but I am forced to build a 2.0 liter for now so I will have to rev the piss out of it. The really cool part is when street racing just hit 3rd and wrap the thing out to 9k and never have to shift I dont race past 120-125 anyhow. Thats is my only thing I love about a 2.0 is the "longer gears" higher rpm give ya.


Later

Off topic, but how far are you from Carlisle? I was down there last weekend with my GVR4 and the alternator went. Ended up buying 2 batteries at walmart to make it to York, luckily Steve from Stemar Motorsports was around to let us use the garage .

I agree with you too, theres nothing like running a 2.0 motor to 9k+.

Nate
SBR