Thoughts on a stroked 4g64 block with a 4g63 head

[Beanokid69]

Could achieve 2.6L but what kind of problems would i possibly run into with attempting this build?

I would be running it with a gt4088 backbone

 

[nuclearr]

I have the same engine planed. The engine is a low revving motor due to the long stroke. If you want to rev to the sky stay with a 4g63 block. Also may run into transmission issues with the amount of torque the engine will produce. I think I am going to have to go auto again.

 

[bryanwheat]

What crank have you found that has a longer stroke than 100mm?

 

[agentorange313]

What crank have you found that has a longer stroke than 100mm?

Hes probably talking about this kit:
EXTREME PSI : Your #1 Source for In Stock Performance Parts


Uses a 4g64 block with a 106mm crank.

 

[twicks69]

Likes to split blocks if they are not sleeved, and you will be breaking transmissions with the torque on a 40r.

 

[bryanwheat]

I would just keep it at 2.4. I see the ability to be able to keep the rpm's up to be more of an advantage than the extra .2 liters of displacement.

 

[95twinturboawd]

Hes probably talking about this kit:
EXTREME PSI : Your #1 Source for In Stock Performance Parts


Uses a 4g64 block with a 106mm crank.

that might be perfect for a starion swap keep the 2.6 thing

Could achieve 2.6L but what kind of problems would i possibly run into with attempting this build?

I would be running it with a gt4088 backbone

even on a 2.6 you wont have boost untill 4+

 

[jcart953]

Someone has already built one a put the video on youtube:

RARE 2.6L Stroker 4G63/4G64 Hybrid 6-BOLT Race Engine - 1st Gen AWD DSM - YouTube

He shows pics, startup, driving, and at the ned you can see his entire build list. So your best bet would be to ask him and see what advice he could give about potential problems etc.

 

[Beanokid69]

Ya the only thing I was thinking was tranny problems with all that torque I see that Brian crower makes a stroker kit for the 4g64 ill keep researching and post what I find out here for anyone that is interested in this build

 

[JacksonAuto]

We've built a couple of them in the past two or three years. Lots of torque. We short filled the water jackets to provide a bit more stability since the 2.4 blocks are a bit thinner than a 2.0. We found that to get good results we had to change the way we ported the heads and needed custom cams. Filling that kind of volume with a head designed for a 2.0 opens up a big can of worms. Once we got it ironed out the customer said they flyyyyy.

 

[Beanokid69]

Good to hear! what about little things like the timing belt and head gaskets?

 

[bastarddsm]

I wanted to do one of these in N/A for a motor for an open light rally car...

 

[JacksonAuto]

I wanted to do one of these in N/A for a motor for an open light rally car...

THAT could be fun High compression N/A 2.6.

 

[jdsoza]

Sleeve it and call it a day and build a torque monster. I want to do this for a daily. And RPM isnt everything. My machinist has an old vette, 4.125 inch stroke, and a mere 7000rPM redline, two turbos, and it runs low 9's. So if you even get 7500RPM and have a broad powerband you could have a fun car. i'd do it if i could afford that dogbox......

 

[twicks69]

The setup would be a fun one to play around with, but I would strongly suggest running a built automatic to reduce driveline failure.

Ebrahim Al Gattan has also done this setup a few times and had issues with keeping head gaskets in them under high boost, along with block failures.

 

[Beanokid69]

Ill probably build the motor on the side as a fun little project and see what happens...i have a conquest that sitting and waiting for a motor

 

[twicks69]

Go with the smallest bore size possible. As well, a partial hard block or sleeve install would be beneficial for high power levels and boost levels.

 

[Beanokid69]

Ya I'm gonna do some more research then start planning out the build...i had somebody contact me from BC this morning about a 2.5L kit and gave me some info on ebrahams build and his failures...i just dont want to rush it and end up building something I'm going to have to tear apart after every pass

 

[twicks69]

Ya I'm gonna do some more research then start planning out the build...i had somebody contact me from BC this morning about a 2.5L kit and gave me some info on ebrahams build and his failures...i just dont want to rush it and end up building something I'm going to have to tear apart after every pass

Yup, I agree, research is key.

 

[donniekak]

I don't see this working out great. Here are a couple points to remember. The 5 speeds hate torque, so an auto is almost a must. This creates another problem, the autos do not have gearing friendly to a low revving engine. To get any trap speed out of the 2.6 something would have to be done with the overdrive shaft in the trans.

There is a reason most of the top 4g based cars are running 2.0's.

 

[Beanokid69]

Thanks for the input I'm going to keep researching

 

[thatcarchick]

I know this post is a little old, but i'm going to throw my two cents in anyway.
I'm currently doing some research as I am looking to overhaul my Eclipse Spyder GS into a manual car with a 4G63 top end... I stumbled across the website below and it had some useful information. Hope it helps.

:: Project Zero G ::