Most successful built seven bolts?

[skinnypimp]

my 7 bolt has 117k and still running strong. my 98 gst had 72k on it and had no signs of cw when i sold it. cw is overated, i'll say it again any car can cw, even 6 bolts

 

[2gredspyder]

my 7 bolt has 117k and still running strong. my 98 gst had 72k on it and had no signs of cw when i sold it. cw is overated, i'll say it again any car can cw, even 6 bolts

While i agree with you that any motor can walk, i dissagree that CW on 7 bolts is overrated, its not. Just because your motor at 117k is running strong doesn't mean that its not walking. Im doing high 12s with my current motor at 122k miles. its running strong as ever, but guess what? Its walking. Same thing happened with my other car. Same thing with my friend's car and same thing with many of my club menbers. Any motor can walk, 7 bolts just walk way more often. Just a few months ago a friend gave me a running 7 bolt motor that was running strong when removed from the car, before i instaleld i measured for play, and it was out of spec. I'd rather take my chance with a 6 bolt that i just bought.

 

[DSMJim]

my 7 bolt has 117k and still running strong. my 98 gst had 72k on it and had no signs of cw when i sold it. cw is overated, i'll say it again any car can cw, even 6 bolts

Take your car to Jackson Auto Machine since they are so close, have them measure your end play. I'll bet your out of spec and have crank walk regardless of what you say. If I'm wrong, I'll give you my old 7 bolt motor out of my car that was also running strong for when yours does blow up. You pay shipping...

 

[skinnypimp]

well if does blow, i have the money to buy another one. this car stuff does not make or break me, and i do not spend all my cash on it. if the talon breaks i have two other cars i can drive until it's fixed. can you say the same??? when your 6 bolt shits on you,(and it will) give me a call so i can pay your bus fare. ta lon

 

[wrx2dsm]

CW is not over-rated but I do believe that driving habits and tuning play a major part. I have 109k on my early 95 GST....pulled the oil pan and it's still within tolerances. However, on the other hand, my buddies 95 has been through 2 7-bolts. Both where the victim of CW(pulled and measured). He is currently on a built 7 bolt(3rd one...I know...but it was dropped in, before 6 bolt swaps where common, with clevite bearings and 6 bolt oil squiters and it seems to be holding together fine). The first motor was beginning to walk and after his stock clutch failed and was replaced with an ACT it finished destroying itself quickly. He believed the first CW was related to the clutch. The 2nd motor walked within 8k miles of leaving the dealership. Now...this all happened 3-4 years ago. There was not the proliferation of information via the internet then. We where somewhat isolated by being in a backwoods town. I have also seen more 4g63's(both 6 and 7 bolt) go bang from poor tuning. I feel for the guys that depend on their DSM's for daily driving. I am fortunate enough to not be in that boat. Its aggravating to have it broken, but I can still get to work. I will ride my 7 bolt till it dies then address the problem. I will prob swap in a 6 bolt but I have also seen three 6-bolts walk.

 

[Denji]

Take your car to Jackson Auto Machine since they are so close, have them measure your end play. I'll bet your out of spec and have crank walk regardless of what you say. If I'm wrong, I'll give you my old 7 bolt motor out of my car that was also running strong for when yours does blow up. You pay shipping...

the only kind of crankwalk that matters to me is the kind that causes my engine to prematurely go bad. i.e. if a car walks so slowly that there are no symptoms and it eventually just dies at around 200,000 from the sheer mileage and wear and tear, i would say that that car didnt really have a problem at all, even if the crank was somewhat out of spec. It makes so much more sense to me, if it isnt broken, dont fix it.

 

[Amar1995]

CW is not over-rated but I do believe that driving habits and tuning play a major part. I have 109k on my early 95 GST....pulled the oil pan and it's still within tolerances. However, on the other hand, my buddies 95 has been through 2 7-bolts. Both where the victim of CW(pulled and measured). He is currently on a built 7 bolt(3rd one...I know...but it was dropped in, before 6 bolt swaps where common, with clevite bearings and 6 bolt oil squiters and it seems to be holding together fine). The first motor was beginning to walk and after his stock clutch failed and was replaced with an ACT it finished destroying itself quickly. He believed the first CW was related to the clutch. The 2nd motor walked within 8k miles of leaving the dealership. Now...this all happened 3-4 years ago. There was not the proliferation of information via the internet then. We where somewhat isolated by being in a backwoods town. I have also seen more 4g63's(both 6 and 7 bolt) go bang from poor tuning. I feel for the guys that depend on their DSM's for daily driving. I am fortunate enough to not be in that boat. Its aggravating to have it broken, but I can still get to work. I will ride my 7 bolt till it dies then address the problem. I will prob swap in a 6 bolt but I have also seen three 6-bolts walk.

Wow, if Jacksonville FL is a backwoods town then I must live in B.F. Egypt !

 

[wrx2dsm]

Jacksonville is the largest city by land-mass in the US. It's very spread out and some parts are very backwoods. Plus it doesnt help that my friends are not huge believers in finding answers on the internet. There is a strange mixture of people in this town, I.E. a 97 GST with T-25 and 272's riding around with no hood cause he didnt have time to put the hood on before cruising out to the "spot." He was hoping to make good power with cams.........on the T-25.......

 

[PaleDSM]

94k on the stock 7 bolt motor. Car runs 120+ on pump gas and on the tune that I drive it with every day. Stock motors are strong when tuned right let alone a built motor.

 

[skinnypimp]

Jacksonville is the largest city by land-mass in the US. It's very spread out and some parts are very backwoods. Plus it doesnt help that my friends are not huge believers in finding answers on the internet. There is a strange mixture of people in this town, I.E. a 97 GST with T-25 and 272's riding around with no hood cause he didnt have time to put the hood on before cruising out to the "spot." He was hoping to make good power with cams.........on the T-25.......

your boy is a retard, it only takes 2 minutes to put on a hood. who is your boy, i may know him

 

[wrx2dsm]

Just some guy I saw riding around.....dont know him other than talking for a few minutes about his cams and his T-2small.

 

[2gredspyder]

CW is not over-rated but I do believe that driving habits and tuning play a major part. .

I know that some cars will fail as a result of poor tuning, but i dont see how poor tuning will affect crankwalk. Im i missing something? Modded and stock cars get CW, so how would tuning have anything to do with CW?

 

[DSMJim]

well if does blow, i have the money to buy another one. this car stuff does not make or break me, and i do not spend all my cash on it. if the talon breaks i have two other cars i can drive until it's fixed. can you say the same??? when your 6 bolt shits on you,(and it will) give me a call so i can pay your bus fare. ta lon

Hhaha, your pretty funny. Still living at home? Dude I own a house and two other cars but thanks for the rich-kid attitude, don't worry it didn't work though because I acctually do have money ..

The 6 bolt only only take a shit on me when I make 700whp or blow it up doing something stupid like 170mph on the highway. When you crankwalk and your walmart job doesn't cover the cost and mom and dad won't cough it up, let me know I'll send it anyway.

 

[wrx2dsm]

Let me clarify. The correlation between tuning and CW lay more in the final determination. I am saying that motor failures are more often than not, the result of poor tuning and poor safety. CW is very real, but I also believe that many instances of motor failure are blamed on CW undeservingly. DSMJim is right...most 7bolts are prob suffering from some form of CW but I also agree that if it doesnt effect the drivability of the car...Im less concerned. I bought the car with the "threat" of CWing a 7bolt and with that knowledge prepared myself for repairs. All in all...the 4g63's are very stout 4 cyclinders. They are prob the most potent 4banger to ever come from Japan.

 

[skinnypimp]

Hhaha, your pretty funny. Still living at home? Dude I own a house and two other cars but thanks for the rich-kid attitude, don't worry it didn't work though because I acctually do have money ..

The 6 bolt only only take a shit on me when I make 700whp or blow it up doing something stupid like 170mph on the highway. When you crankwalk and your walmart job doesn't cover the cost and mom and dad won't cough it up, let me know I'll send it anyway.

jim i'm not a rich boy, i'm 28 married with 3 kids, i'm just smart with my money. walmart makes great motors

 

[NvDiS]

sorry i had to bring back a 7-year old thread but im debating hardcore weather or not just to fully built my 7-bolt that sitting in my car or swap, how are the built 7-bolt holding up now a days?

 

[IrishBeatdown]

sorry i had to bring back a 7-year old thread but im debating hardcore weather or not just to fully built my 7-bolt that sitting in my car or swap, how are the built 7-bolt holding up now a days?

Better to bring back this thread than start a whole new one, that has been done a million times. I think a lot has changed since this thread was made. Most 7 bolts that were susceptible to walking have already walked. It seems like you hear less and less about it these days. More and more people are making the choice of building their 7 bolt rather than swapping. Build her up and do the 7 bolters proud.

 

[dexterholland04]

Personally, I don't believe that many of the reported cases of crankwalk were actually that. Also, I've seen more 6-bolts walk through the years than 7-bolts (again...personal experience). I would have no problem at all in building a 7-bolt motor someday. When I get to that point

 

[SpoolinTalonAWD]

Dont build your engine unless you have to.
I have seen stock blocks hold 30+psi on high octane fuels, E85/Race gas. 4g63s are tough s.o.b's. Just keep your tune in check.

 

[dacowgod]

Corey Bowers reset the Stock 7 bolt record to 10.0 I believe at the shootout... They can handle abuse..

If you want to run a 7 bolt .. the late 97 - 99 7 bolts have a new Thrust bearing design that is like the EVO's... IMO they are better than any other year 7 bolt or 6 bolt out there.. A 7 bolt is honestly a much better designed engine from the factory..it has a lighter rotating mass. It is girdled, The oil squirters are better.. The heads are better to around 700-800 AWHP ... They have a bump in compression VS a 6 bolt if talking stock vs stock.. I'm sure the list goes on..

I've always done a 6 bolt swap..but I Finally got my hands on a 98 Split thrust block so I will be building a 7 bolt for my next engine..


FWIW ANY engine crankwalks... I have seen multiple 6 bolt engines crank walk as well as honda's and V8's.. Its not as uncommon as you think..

Its thought that heavy clutches have something to do with it ..along with the oil clearances..

Keep your rod bearings tighter than your main bearings.. assemble it properly.. Clean it thoroughly and once you think its clean..clean it again... Measure all of your tolerances and torque specs and don't cut corners and your 7 bolt will likely live a long and happy life..

 

[supermech21]

This has been a great thread to read. Initial comments, the 6 bolt guys vs 7 bolt guys thing is dumb, their all DSM's. Who cares, everyone knows what their getting into when you plan to mod a 7 bolt. Having said that im pricing out a new "budget'ish" build, 6 bolts are harder and harder to find and performance parts for 7 bolts are cheap and plentiful, per the classifieds section. This is my summary (i compiled info from 3 informative posts, sorry I didnt quote the OP's): For building a 7 bolt

1 - 97-99 had a different thrust bearing design(similar to evos).
2 - Heavy clutches can cause CW. Run a lower clamp load clutch.
3 - {Goes without needing to be said} Take your time with bottom end assembly, mistakes are amplified with a 7 bolt. Keep your rod bearings tighter than your main bearings
4 - Main cap dowel kit with ARP furniture
5 - Mod the thrust bearing for oiling (shouldnt be needed if 97-99)

Symptoms:
1 - Oil pres will fluctuate when the clutch is depressed (hear say from Buschur)
2 - CAS will fail
3 - Obvious crank play
4 - Clutch will lock when taking a sharp left

Please, feel free to add and modify ths list. Hopefully with threads like this we can expand the potential engines to build, not limit.

 

[Miasma]

I'm still building mine right now, should have it in the car by summer.

It's a 2.4LR 4g64 7 bolt with evo 8 conversion, going into my eclipse gs (420a) lots of custom work for install. But the engine should be solid. Its not a 63 7 bolt, like you probably asking about, but it's a 7 bolt non the less.

Oem 100mm crank
Long rod Manley 156mm Turbo Tuff rods
Manley 9.0:1 Pistons
Arp Main Studs
ACL Race Bearings
Arp L92 Head Studs

Shooting for 650whp on this engine.