2.4 n/t

[Dsm810z]

Website will not allow me to post in the short block section yet, so here it goes. I've read til my eyes bled on this subject and now just need some clarification for a n/t application.

Some of you know of my recent transmission catastrophe, and were very helpful in providing information to match up a 2g fwd turbo transmission to my 1g talon with a 6 bolt 4g63. I had everything mounted up correctly and my Talon ran better, shifted smoother than ever before... for two days. On day 3 of just getting the transmission, axles, clutch, and flywheel installed the engine overheated and fried the head, internals, etc... When my stock transmission blew and fell down on the crankshaft it obviously caused more internal damage than I thought. The general consensus is for me to scrap my DSM, but I cannot bring myself to do it so I have decided to go with a 2.4L n/t swap. All my external engine components on my blown 4g63 are brand new so I can just swap everything over to the g4cs, excluding the timing belt and cam gears, of course.

I'm going to use a g4cs block with a 1g 4g63 head. My cam choice will either be BC 280s or FP4s. Any other recommendations?

Now, as far as internals go, I've read that that if I use 1g rods with stock g4cs pistons this will yield an 11:1 compression ratio. Remember, this is a n/t application so I am not shooting for a compression ratio for running boost. Is this a reasonable compression ratio for a n/t street car? Are there any ways to tone it down just a bit to about 10:1 or 10.5:1??

What size fuel injectors will I need to run the 2.4L n/t setup?

Thanks in advance for all the help,
Chris

 

[dsm-onster]

That's what I was thinking in regards to the mount locations. How would a rear roll stop be mounted to a seven bolt engine to mount in the factory 6 bolt location?

6bolt, 7bolt 1g 2g 4g63 4g64 all the rear mounts are on the block and have the same bolt pattern. . . At least for the narrow blocks we're talking about. Don't know about those crazy starquest compatable blocks. . .

 

[mysticj]

6bolt, 7bolt 1g 2g 4g63 4g64 all the rear mounts are on the block and have the same bolt pattern. . . At least for the narrow blocks we're talking about. Don't know about those crazy starquest compatable blocks. . .

So it safe to say to used the driver, passenger, & rear mounts. This make the rear as solid as possible. I never did understand why Mitsu used four motor mounts.

 

[Dsm810z]

How much modification to the driver's side engine mount is required??

Anyone know if using urethane mount inserts for the driver, passenger, and rear mounts would be sufficient support if there is no front mount?

I suppose I'll just bite the bullet and pull one of the many 4g64's sitting around at the yard. Is there a certain model vehicle that the 4g64 came in that would be a more favorable option, or are they all the same?

 

[dikdiamond]

If you are looking for a 6bolt version of the 2.4 block. Wich in your case would be easier to probably do


http://www.roadraceengineering.com/mitsumo...pplications.htm

thats a list of the mitsu motors (4 cylinder).
summary:
89-91 hyundai sonata 6 bolt 4g64.. g4cs is the best option
others:
85-87 galant 6 bolt 4g64..
90-92 expo 6 bolt.
make sure they are the 12-1/4" bellhousing.

I couldn't get your link to work,here is a working one Mitsubishi 2.0 to 3.0 Engine Applications, '88-95

 

[mysticj]

How much modification to the driver's side engine mount is required??

Anyone know if using urethane mount inserts for the driver, passenger, and rear mounts would be sufficient support if there is no front mount?

I suppose I'll just bite the bullet and pull one of the many 4g64's sitting around at the yard. Is there a certain model vehicle that the 4g64 came in that would be a more favorable option, or are they all the same?

8-valve 4G64 block with your 1G head will give you over 12:1cr, the 16-valve 4g64 with your 1G head will NOT change the compression unless you swap the 93-95 Elantra G4CN head. It will raise your compression by .5cr. 16-valve 4G64 compression depends, most are 9.5:1 but others are 9.0:1 or 10.0:1(rare).

 

[Dsm810z]

According to that engine chart, all the 7 bolt 4g64's (post 92) had 16 valve heads. Am I reading that chart correctly? If so, that puts me back in the same situation looking for a 6 bolt engine...

How much modification to the driver's side mount is required to make a seven bolt engine work, and does anyone have insight regarding the stability of using three urethane mount inserts w/ the front roll stop deleted?

 

[mysticj]

According to that engine chart, all the 7 bolt 4g64's (post 92) had 16 valve heads. Am I reading that chart correctly? If so, that puts me back in the same situation looking for a 6 bolt engine...

How much modification to the driver's side mount is required to make a seven bolt engine work, and does anyone have insight regarding the stability of using three urethane mount inserts w/ the front roll stop deleted?

I.E. 91-94 Expo....8-valve 4G64. For the 7-bolt driver mount, you will just cut/trim area near the tensioner and water pump, IIRC.

You won't be making that much power to infer witht the stability of using three mounts. Maybe an engine damper won't hurt either.
http://www.magnusmotorsports.com/tech/1gina2g.pdf


http://www.dsmtuners.com/forums/cyl...75-motor-mount-differences-between-1g-2g.html

 

[Dsm810z]

So in order to raise the compression, i need to use a 6 bolt 4g64 with the dohc 4g63 head? a 7 bolt will not raise the compression is that what I'm gathering?

 

[mysticj]

So in order to raise the compression, i need to use a 6 bolt 4g64 with the dohc 4g63 head? a 7 bolt will not raise the compression is that what I'm gathering?

Correct. Unless you use the 93-95 Elantra 1.8L head.
Hint: The 92-98 2.0L Sonata head will raise compression too, just need to reshape(gasket match) the intake ports to the 1G IM.

 

[mysticj]

You must be logged in to view this image or video.

G4CP/G4CR head on the right.

 

[dsm-onster]

The g4cr head is just like to 4g61 head correct? 2g runners with 43cc chambers, right?

 

[Dsm810z]

I've decided to run the factory 4g63 block with a 4g67 (g4cn) head to raise the cr to about 10:1. I believe this will be more suitable for my application. There is an abundance of these heads around where I am, and I can get a decent 4g63 block local as well. I'm still going to get those hks 272 grinds from Delta.

Does this sound like a good setup?

Thanks for all the help,
Chris

 

[dsm-onster]

4g63: 85mm bore, 88mm stroke. 4g63 n/a pistons have a 8-9cc dish and 9:1CR. Stock composite HG thickness is 1.2mm. Using a 43cc head will bring your CR to 9.45:1, not 10:1. . . Calculator. It's worth the swap if the head is already off and needs to be freshened up.

 

[jimmythesaint]

Alright, I took a trip to the local pull a part this morning, and this is what I found:

I got my 6 bolt 4g64 block from a 92 Gallant at the pull a part here in Montgomery. Only an hours drive for ya. We used to come up to the Birmingham location and get all our parts before they opened this one up here. Check their inventory online, or give them a call. The managers name is Neal.

 

[Dsm810z]

what is the stock deck height for a n/t 4g63?

I was thinking about boring the 4g63 block to 86.5mm to boost the compression a bit more.

If I use the 4g67 head, do I still need to tune with a safc?

 

[mysticj]

The g4cr head is just like to 4g61 head correct? 2g runners with 43cc chambers, right?

Yes and yes. "16" is stamped on the back of the head.

Dsm810z, by the time you bore over the 4g63 and buy pistons to fit, you could have just swap in the 4g64.

 

[Dsm810z]

I will just run the 4g63 block with the 4g67 head, and be done with it.

Will tuning with a safc be required for this? I was going to go ahead and swap in a 2g mas while everything is apart, and use HKS 272 cams.

 

[Dsm810z]

I've got parts on the way to run the following setup since it was easier for me to get a nice 4g63 6 bolt block:

HKS 264/272 grind cams
Clevite main and rod bearings
g4cn head
Evo 8 valve train
Evo 9 pistons on frankenstein rods
Balance shafts eliminated
Polished factory 6 bolt crankshaft
Block bored .02 over to accept evo 9 pistons

I believe this will yield the results I was looking for and still leave room for later turbo application if I so desire. Drivetrain to accompany is a 2g turbo transmission, 8 lb Fidanza flywheel, stage 2 turbo clutch, and '94 turbo axles all of which were installed on a previous date.

- Chris