2g Engine and 6-bolt?

[mach4g63t]

Okay, so, this is my question. I've done some looking around on this site as well as other DSM sites I know about. I USED to own a 1995 5-speed TSi AWD, so I know the basics about these cars. I've been scowering these forums as of late as I plan to buy another DSM here in the near future. So, onto my question...

Can a 6-bolt Crank be used in a 2g motor? Or, is this even a legitament idea? As much as I am a fan of the 1st Gen DSM, I absolutely LOVE the 97 - 98 TSi AWD and that's what I plan to buy again after 3 years w/o a DSM. I know the 2gs are extremely prone to Crank Walk and I'm certain my '95 would've done so if I hadn't wrecked it first. Well, I've become a little more mature and I want to get another one. I want to build it slightly beyond my previous which was a low 13-second build (blah blah blah). I was wondering if I can swap the cranks out to prevent the walk if, and when, I most likely tear the motor in it apart for my ideal upgrades, or do I simply just need to rethink it all and drive the poor 7-bolt to it's dying leg with swappable bolt-ons and just get a 6-bolt when it dies?

Any info/comments and such is greatly appreciate. Thanks in advance for your time.

-Matt

 

[AK_4g63t]

Well I just looked up the specs on them both and they are different. Not a major difference but 1g crankshaft outside journal diameter:56.98-56.995mm, 2G2-57mm. I would say that if you are that worried and are going to tear the motor apart anyways... just but a 2g with a blown motor for cheap and build a 6-bolt and throw it in there.
-Donny

 

[mach4g63t]

It's not that I'm afraid I'm going to buy one with a bad motor. It's just that I plan on having this car for quite awhile. Eagle Talons are the cars that got me INTO cars. First time I ever saw one was on Bill Nye the Science Guy and he was talking about Lateral G's and G-force and used an Eagle Talon TSi AWD as his example subject. It was beautiful. Been obsessed with them ever since.

I'm just wondering because I know there are a lot of upsdies to the 2g Motor in lieu of the bad crank. So, I was just wondering if it was at all possible to just do a simple swap without going through the hassle of finding a good/rebuilt 1g motor and paying 1500 bucks for it. Where as, if possible, I could simply pay for a 6-bolt Flywheel and Crank and slap it in the bottom and go on as if it was the same as a 1g.

 

[mygsx2120]

Crank walk is very overrated. I definately wouldn't build and motor to prevent it. No one has determined what causes it(aftermarket clutches, oil squirters, etc.), so there is really no preventative measure. Unless you buy a 6 bolt block and do the swap. Much more involved than just a crank.

One option would be to buy one that already has a 6 bolt swap done. Or you could look for a 2gb dsm, they walk less than 2ga dsms. Also once the motor surpasses 100,000 miles it greatly reduces the chances of it walking.

I think you are wasting your time worrying about crankwalk and have obviously been misinformed. Don't worry about crankwalk unless it happens, then just build a 6 bolt. I think something like 5% of 2gs walk, which isn't that much. Don't quote me on the percentage because I am not sure, but I know it's not too many more. Trust many, plenty of others will agree. Also go to magnusmotorsports website and read their writeup on the subject. It will clear up some of your misconceptions.

Hope you find a nice ride, welcome back to the DSM world.

 

[mach4g63t]

Well, I guess another idea would be, is it JUST the crank itself that causes the problem in the 2g's or is it something else? Would buying a different crankshaft itself remedy the problem? If so, are there any companies that produce them? I'm just tryin' to get some possibilities.

 

[mygsx2120]

Ok I just read your second post and your answer is no. Either do the full swap, live with a 7 bolt, buy a 1g, or consider another car. Those are your only options.

And by full swap, I only mean the bottom end and block, you can retain your 2g head. Some say they are designed better.

Tons of companies sell aftermarket cranks, you obviously haven't looked at all. This will still not eliminate the chance of crankwalk. Trust me, you are way too concerned with this issue. I'm sorry if I sound pissy, but these cars are the best platform you can get for the price. I hate to think of someone not owning one because of something that probably isn't going to happen.

 

[mach4g63t]

Crank walk is very overrated. I definately wouldn't build and motor to prevent it. No one has determined what causes it(aftermarket clutches, oil squirters, etc.), so there is really no preventative measure. Unless you buy a 6 bolt block and do the swap. Much more involved than just a crank.

One option would be to buy one that already has a 6 bolt swap done. Or you could look for a 2gb dsm, they walk less than 2ga dsms. Also once the motor surpasses 100,000 miles it greatly reduces the chances of it walking.

I think you are wasting your time worrying about crankwalk and have obviously been misinformed. Don't worry about crankwalk unless it happens, then just build a 6 bolt. I think something like 5% of 2gs walk, which isn't that much. Don't quote me on the percentage because I am not sure, but I know it's not too many more. Trust many, plenty of others will agree. Also go to magnusmotorsports website and read their writeup on the subject. It will clear up some of your misconceptions.

Hope you find a nice ride, welcome back to the DSM world.

Hah. My previous post was a little late. And thanks for the info. I'll definitely be doing that. I guess I do have some misconceptions because I was under the assumption that once the motor hit 100k that's when its chances to crankwalk were the greatest. Anyway, I'll take your advice. Thanks.

 

[mygsx2120]

I'm just tryin' to get some possibilities.

One option would be to buy one that already has a 6 bolt swap done. Or you could look for a 2gb dsm, they walk less than 2ga dsms. Also once the motor surpasses 100,000 miles it greatly reduces the chances of it walking.

Well, I guess another idea would be, is it JUST the crank itself that causes the problem in the 2g's or is it something else? Would buying a different crankshaft itself remedy the problem?

Ok I just read your second post and your answer is no. Either do the full swap, live with a 7 bolt, buy a 1g, or consider another car. Those are your only options.

Good luck

 

[mygsx2120]

My GSX is a '95 so all I heard from people when I bought it was how it is going to walk. Blah, blah, blah. Tons of mods, act 2600 clutch, and it's still going stong.

I have been reading these forums for a few years now, most all experienced members will agree. Do a search on here, type in crankwalk. Almsot every thread will say it is overrated.

 

[luvmygst]

C/W is WAAAAAY overrated. Just rebuild the 7 bolt motor and have at it. another option is the 6 bolt swap, but this is alot more involved than most would leave you to believe. as for using the 6 bolt bottom and the 7 bolt head there is some work that has to be done to the head first. The bolt hole have to be enlarged 1mm gr the studs to fit. Not toi mention that with the swap you run the misfire code problem that happens to some(not all for some reason) To do a swap correctly you need to have dsm link.

I am a firm believer in the 7 bolt . keep in mind that any motor can C/W. Its not just a DSM thing. The best bang for the buck is to rebuild the 7 bolt have a set on 6 bolt rods machined to fit the 2g pistons and you have a platform that is good to 450-500hp just my .02

 

[mach4g63t]

C/W is WAAAAAY overrated. Just rebuild the 7 bolt motor and have at it. another option is the 6 bolt swap, but this is alot more involved than most would leave you to believe. as for using the 6 bolt bottom and the 7 bolt head there is some work that has to be done to the head first. The bolt hole have to be enlarged 1mm gr the studs to fit. Not toi mention that with the swap you run the misfire code problem that happens to some(not all for some reason) To do a swap correctly you need to have dsm link.

I am a firm believer in the 7 bolt . keep in mind that any motor can C/W. Its not just a DSM thing. The best bang for the buck is to rebuild the 7 bolt have a set on 6 bolt rods machined to fit the 2g pistons and you have a platform that is good to 450-500hp just my .02

Sounds like a plan. Appreciate the info.