Want some options/advice on a temp 2.4L project

[98spydert]

I've got big plans for big power but I don't have the thousands of dollors to throw down all at once Like most people probably. I bought a 95 Talon TSi AWD last month that took a dump and killed the engine. The car's future is some big hp numbers and low 1/4 numbers but for now I'm just throwing something together temporary to get it running decently and prepare for the bigger build.

The car's current mod list that either came with it or I've added so far:

Full suspension mods
Full brake mods
Poly engine mounts
Fidenza/2600 ACT/B&M short shifter/ss clutch line/shifter bushings
DSMLink V2 and Greddy 60mm boost
Buscher 3" turbo back
BBK 255L pump and an AFPR but only 450s for now
Probably a stock side mount for now also
Some other stuff that I can't remember.

Here's what I have to throw together an engine for it.
94 Galant short block (DOHC 4g64)
Rebuilt 4G63 head gasket matched for 1G manifold and polished
1G manifold & throttle body

The future holds a To4E 60-1 with lots of other stuff (supporting mods) but I really can't start that for at least 2 more months for my own reasons. I do want this car running for my own reasons also. Although it'd be best to just wait and build up a parts stock pile, I'm going to do it this way.

1st question: What's a safe boost limit on the stock short block w/ turbo head (asuming a good tune)? I'll have a 14b on for this temporary set up. What compression ratio do you end up with with stock 2.4 internals and a 63 head. 9.5:1?

Really the main question is what else can I do to this set up for maximum power (safe power for the stock shortblock that is) that can be re used on the big power build? For example, I'm not going to bother with little things that I'll just have to rebuy/replace later this year for my future build. I don't plan on breaking any records with the current set up or anything but I'd like it to at least be fun to drive.

The only thing I can even think of is a good balance shaft removal kit and a metal head gasket since they're supposably reusable. Concidering I'm not disassembling the short block, I can't think of squat. So throw ideas my way that won't break the bank... if there are any

 

[gixrman]

You'll have to look up the cc of the heads to determine if your C/R is going to change. They should be the same thou. With stock 64 pistons I don't think its going to last under boost......

9:5:1 is a little high for pump gas.

 

[goofynick6]

Stock 2.4L pistons are good for about 10psi max, and the compression will be high as well. Just take your time on a project like this, build it up slowly, and until that is ready, just drop in a junkyard motor or something to get you by.

Building a 2.4L the wrong/cheap way will only have you rebuilding and doing this all over again before you know it anyway.

Nick

 

[98spydert]

I understand it's not the ideal way to do this but it's temporary and not going to see max duty or track time. It'll have a small turbo on it and be close to stock as far as engine performance.

And 9.5:1 was a guess, I'm not sure what the stock 64 pistons would yield.

 

[goofynick6]

Stock 64 pistons yield around 10:1 I believe, and maybe dangerously close to the valves depending on how much things get milled.

Nick

 

[98spydert]

Project cancelled Going for the full 2.4 build right away.

 

[Revolution]

Out of curiosity why not a 2.3L build up?

 

[98spydert]

Well, I don't want to rebuild any of the 7 bolts I've got and don't want to do the 6 bolt thing. I've got a 94 Galant short block sittin here that's in awsome condition and the tq will be fun in an AWD so I'm gonna try it out. I don't think the 2.3 would benifit me in any way and would end up costing more in the end.

 

[Lunch_Box]

Stock 64 pistons yield around 10:1 I believe, and maybe dangerously close to the valves depending on how much things get milled.

Nick

I thought it was around 12:1?

 

[Jhoe]

I used 9.5:1 pistons on my 2.4, ended up with a C/R in the upper eights 8.7-9:1, can't remember exactly right now...

 

[NOSLO2PT0]

I believe the 94 Galant 2.4 was a 7 bolt. Or there were problems with a DSM head bolting onto it regarding HG issues. Whatever the reason was, that particular engine/year/car wasn't one of the desired 2.4's. Try locating a G4CS out of an 89-92 Hyundai Sonata. Those are the good ones. 6 bolt, 2.4L, everything bolts right up.

 

[Jhoe]

Well I wouldn't say just 'bolts right up' a few things, like drilling holes, must be done to the block.

 

[aero_sallee]

I believe the 94 Galant 2.4 was a 7 bolt. Or there were problems with a DSM head bolting onto it regarding HG issues. Whatever the reason was, that particular engine/year/car wasn't one of the desired 2.4's. Try locating a G4CS out of an 89-92 Hyundai Sonata. Those are the good ones. 6 bolt, 2.4L, everything bolts right up.

I built my motor using the 94 galant block and crank. Yes, it is a 7 bolt motor. I did do research and didn't find any of the typical 7 bolt walk issues with it. I originally wanted to use the sonota block, but wasn't able to find one within driving distance of my home.
The 94 galant block needs to have a couple of holes plugged in the head mating surface. They arent anything difficult, my machine shop charged like $15 to do it. They are just extra oil drainback holes that the 4g63 does not have. There were no headgasket issues. I used an 87mm cometic HP gasket, arp studs. I believe in a .054 thickness.



The pistons were kind of a pain in the ass. I had to special order them from wiseco since they didnt have a 4g64 piston with the 7 bolt pin size in my overbore and compression. They screwed it up the first time and sent me 9.3:1 pistons rather than the 8.5 that i requested.

The pistons were the biggest pain in the butt, but I did hear that they were going to start making that size rather than requiring custom.

I've been down this road already, so if you have any questions let me know and I'll try and help.

 

[98spydert]

Yeah it is just those 4 holes on the deck that need to be plugged. Everything else is bolt on.

Sounds like I'm going the same exact route as you aero_salle. cometic, arp, wisecos and eagles. They have a regular part number for the 64 pistons now but I don't think they do for any overbores... yet. Thanks for the offer on the help, I may take you up on that if I get stuck.

 

[aero_sallee]

No problem, if you need anything just let me know.

I just looked and the do have an 87m piston which is a .020 overbore. It is just a 4g63 piston with a .080 overbore so the compression is 9.2-9.3:1. You need around a -23-24cc dish to get 8.5:1 compression with the 4g64. Which is why I had to custom order mine. Those pistons have a -17cc dish.

 

[NOSLO2PT0]

I built my motor using the 94 galant block and crank. Yes, it is a 7 bolt motor.

Just curious what your 2.4L stroker cost you for the bottom end.

 

[goofynick6]

You can get a .079" thick headgasket and drop the compression to 9:1 with the -17cc dish pistons, but it depends also on how much you mill your head...I need to figure out how to calculate chamber volume.

Nick

 

[aero_sallee]

I'll have to find out, I don't recall off hand. B-day tomorrow, gonna go out and get messed up.