HOW TO DO AN ADVANCED SEARCH.

Mon Jul 08, 2013 3:56 pm by Admin


For the benefit of 944Hybrids users there are two search functions available for you to use.
The purpose of this sticky is to explain the "Advanced Search" function because it is much more powerful and is the best choice when researching information.

When you log on to the site a list of options is shown in a line at the top of the page. One option is labelled "Search", use this option (NOT the search box lower down on the right).

After you click on the upper search option, a drop down box appears. At the bottom of this box is a radio button marked "Advanced …

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Cracked Bellhousings? Bueller.... Bueller???

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Cracked Bellhousings? Bueller.... Bueller???

Post  skywalker01 on Wed Oct 30, 2013 5:14 am

Trying to get feedback on anyone experiencing problems with their LSX bellhousings cracking/splitting. I am dropping my engine over the winter for upgrades and re-running of fuel lines and noticed that my bellhousing is cracked. This is the second time that this has happened to me - I am wondering if this something specific to the stresses of autocrossing or something else. At any rate, I think a QT bellhousing is in my future.

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Re: Cracked Bellhousings? Bueller.... Bueller???

Post  944convert on Wed Oct 30, 2013 7:38 am

Was it a used BH? I'm told corvettes involved in a wreck often have small stress fractures to the bell housing afterward.

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Re: Cracked Bellhousings? Bueller.... Bueller???

Post  Admin on Wed Oct 30, 2013 8:05 am

You need to support the transmission from twisting during acceleration and deceleration. Remember that the motor is only on two mount points in the from and late model cars only have one tiny point holding the trans, something will eventually give!

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Re: Cracked Bellhousings? Bueller.... Bueller???

Post  docwyte on Wed Oct 30, 2013 8:41 am

No problems with my QuickTime bell housing after 3 seasons of road racing...

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Re: Cracked Bellhousings? Bueller.... Bueller???

Post  Admin on Wed Oct 30, 2013 10:10 am

Go with the QT bell housing , they are heavy but you won't break it.

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Re: Cracked Bellhousings? Bueller.... Bueller???

Post  docwyte on Wed Oct 30, 2013 10:14 am

The extra 15-20 lbs is more than made up for with power. Plus it has an integral scatter shield.

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Re: Cracked Bellhousings? Bueller.... Bueller???

Post  skywalker01 on Wed Oct 30, 2013 2:43 pm

No this was a brand new GM unit that I ordered last year after discovering that my first bellhousing had fallen to pieces. Eric - you'd think that the motor mounts would really prevent the rotation tendencies. I have an '83 944, so I have billet mounts on both sides of the gearbox. Hard to believe that I still have movement with solid mounts all over the place.
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Re: Cracked Bellhousings? Bueller.... Bueller???

Post  xschop on Wed Oct 30, 2013 3:04 pm

If you've hard-mounted the trans and the engine then the unibody flex will continually pop the bellhousing as it's the weakest link.
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Re: Cracked Bellhousings? Bueller.... Bueller???

Post  skywalker01 on Wed Oct 30, 2013 3:24 pm

Okay - I can accept that (Body Flex). So the QT Bellhousing will be on my Santa list *sigh*
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Re: Cracked Bellhousings? Bueller.... Bueller???

Post  944convert on Wed Oct 30, 2013 4:00 pm

^^ +1

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Re: Cracked Bellhousings? Bueller.... Bueller???

Post  Rich L. on Wed Oct 30, 2013 10:45 pm

If you go to the qt bellhousing, then the next weakest link will be your point of failure. It could be something that would suck even worse to crack. My suggestion would be to back off from those solid trans mounts, something stiff for performance but that would still allow a little movement if you did get some flex in the body.

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Re: Cracked Bellhousings? Bueller.... Bueller???

Post  skywalker01 on Thu Oct 31, 2013 5:53 pm

Next thing that to fail would probably be a gear in the transmission since the CV Joints have been beefed up. May just need to stiffen the body some.
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Re: Cracked Bellhousings? Bueller.... Bueller???

Post  944convert on Thu Oct 31, 2013 6:00 pm

Rich L. wrote:that would still allow a little movement if you did get some flex in the body.
Makes sense...are all your mounts "solid"?

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Re: Cracked Bellhousings? Bueller.... Bueller???

Post  skywalker01 on Thu Oct 31, 2013 6:15 pm

Yeah, all of the mounts are solid. Thought they would be a 'good thing' but I guess with 305 sized Toyo R888s, something's gotta give.
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Re: Cracked Bellhousings? Bueller.... Bueller???

Post  xschop on Fri Nov 01, 2013 7:14 am

I've seen a couple cracked 951 Bells before due to hard mounts as well. IMO a poly trans mount/mounts at the rear and rubber/soft poly engine mounts at front are ideal..JAT
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Re: Cracked Bellhousings? Bueller.... Bueller???

Post  skywalker01 on Fri Nov 01, 2013 9:33 am

xschop wrote:I've seen a couple cracked 951 Bells before due to hard mounts as well. IMO a poly trans mount/mounts at the rear and rubber/soft poly engine mounts at front are ideal..JAT
My transmission mounts have a poly bushing up at the chassis bolt hole - it's appears that they don't allow for much, but I had to dump the Energy Suspension motor mounts because they were looking like the polyurethane was coming apart from the metal mount.
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Re: Cracked Bellhousings? Bueller.... Bueller???

Post  xschop on Fri Nov 01, 2013 9:39 am

That is classic body flex killing the engine mounts.
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Re: Cracked Bellhousings? Bueller.... Bueller???

Post  skywalker01 on Fri Nov 01, 2013 10:04 am

So tower brace? Cage?? All of the above??? Smile
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Re: Cracked Bellhousings? Bueller.... Bueller???

Post  xschop on Fri Nov 01, 2013 10:12 am

Cheapest solution is to use engine rubber mounts and keep your billet/poly trans mounts:D

Def. a strut brace if you don't have one. I'm working on my custom 928 brace this weekend:D 

Get a lower rear A-arm brace while you're at it.
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Re: Cracked Bellhousings? Bueller.... Bueller???

Post  shokwave30 on Fri Nov 01, 2013 10:29 pm

if theres body flexing wouldnt a strut tower brace and some sub frame connectors prevent it?
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