Engine and Transmission Tech

Looking forward to seeing those pics!

The one at the bottom of page 7 costs a little over $100, depending on where you buy it.

Jim

Scott, Did you get a flexplate or flywheel too?

OK, I guess I'll start with the final picture first and explain things later. Bottom line, I'm confident enough that it will work that my next step will be to get a flywheel.



Here is the starter with the aluminum mounting block off. I measured this with a digital caliper but there are no guarentees. The effective diameter of the starter when placed up to the block is 2.59" and the bottom of the tooth (bottom land?) to the edge of the starter housing is ~.9". The length of the extension on the right is about 1.12". This is important in relation to the fixturing boss and the oil pan bolt bosses.



Jim N., I don't have a flywheel yet as I was waiting to get an idea of what size I would need. Probably a good thing. This next picture shows roughly how a 142 tooth might line up. I have a Jeep 4.0 flywheel laying around that is supposed to have the same pitch as the GM flywheels so i traced the pattern and then cut them on my cardboard flywheel mock-up at the 142 and 148 tooth diameters. I know this is very rough but I wanted some idea of what I'm dealing with before spending what I think is going to be a significant amount on a flywheel. Although a 142 tooth might work, and I was really hoping it would for a number of reasons, I don't think I'm going to gamble that it will. I'll be using a 148 tooth, which is what the first picture is depicting. I believe it will give me more options going forward.



This final shot shows what it will look like on the block. Of course I'm not sure yet how far off the block the flywheel/ring gear will be but for sure the starter will be more forward, toward the front of the engine that this picture shows. It also looks like only part of the fixturing boss will need to go. I also think that supporting the starter at the front will be needed. I saw where someone extended his motor mount and used a big muffler clamp to do this...looked like a good idea.



I'm quite confident if someone were to use a plate across the bellhousing mounting surface, as Jim N. was suggesting, that this starter would work well.

It will be quite a while before I get the flywheel, I hope before Omaha but no promises. If I wasn't married, not that I don't want to be, it would be here next week. :)

Regards

Scott

Scott, looks good! 88-93 S-10 2.8 V6 flywheel is zero balance and 148 tooth. Probably best choice for not only more room for the starter but also all the RWD bellhousing options with the starter on passenger side.

What about this one?

[www.ebay.com]

Looks pretty good, will the 148 require the bellhousing flange on the engine to be cut away for clearance on the two top sides?

Jim

Jim B, Same bellhousing pattern. RWD S10 and Camaro 148 tooth flywheel are slightly larger diameter(aproximately1/2") than FWD/2.2 142 tooth flywheel or stock LS4 flexplate. Carl, good find on the flywheel!

Will that work? Y'all were talking about the flywheel needing some offset because of the shorter crank?

Of course, a regular length LS crank can be swapped in. Changes things in the front ancillaries, though.

Scott's cardboard mockup on pages 3 and 5 seemed to indicate that some clearancing might be necessary. Doesn't look like enough to be a problem but the edge of the ring gear could be exposed in a finger accessible area. If so, a small cover would be a good idea.

Jim

Carl, the crank is actually longer than the 2.2 by a little less than 1/8" inch. It is shorter than the other LS motors by 3mm in back(the other LS is .400 shorter than the old SBC) and 10mm in front. Jim B, I think its angle or perspective in that picture,also there is a relief for the stock LS4 starter mount. Probably have to fab a sheet metal dust shield on bottom. I don't know if the 148 tooth flywheel will fit in the 2.2 bellhousing or not. The S10 bellhousing has the Chevy pattern for the T5(the one for Carl!). The 84-86 Jeep Cherokee 2.8 V6 and 2.5 four bellhousings have the Ford pattern. Both have passenger side starters. Scott already has the 2.2 bellhousing with driver side starter on his V6.



Edited 4 time(s). Last edit at 03/17/2013 01:32PM by mgb260.

I shouldn't be disassembling my car any further than it is already but I had to take a look at my 2.2 S10 bellhousing to flywheel clearance. I was pleasantly surprised by what I found.



Looks like the 148 tooth flywheel should fit after all. It will really simplify things for me.

I need to do some research and call some local companies but can anyone suggest an automotive machine shop in the mid-west that does flywheel redrilling on a regular basis?

Regards

-- Scott

Why are you redrilling? Doesn't that flywheel Carl found work?

Jim

No, the the V6 crank flange is different.

I just remembered I had these...they aren't confirmed #s

2.8 Flywheel bolt pattern
Center hole - 1.5"
Bolt center to center - 2.375"

5.3 Flywheel bolt pattern
Center hole - 2.085"
Bolt center to center - 3.125"

Gentlemen,

If you're downloading photos from someone else's website and then uploading them to BritishV8, you're probably breaking the law.

If I notice these violations, I have to delete the photos. I can't leave them on the BritishV8 server. I'm not prepared to defend BritishV8 from lawsuits.

PLEASE stop and think before you post other people's photos here! If the photographer hasn't given you personal permission, don't post.

If the logo of someone's business appears superimposed on the photo (e.g. as a "watermark"), don't even think for one moment of posting the photo here. Those are really obvious copyright violations! It's a flagrant violation of this message board's rules to post watermarked photos here.

-Curtis

Thanks Curtis.
We should be able to do just as well by posting a link to the photo if it is on another site. That way there is no trademark issue.

Jim

Probably me, I posted a few thumbnails that were from EBay or autoparts stores and didn't see the copyright or water mark. Not intentional. I'll be more careful, link and description.

Quote:

The LS engines are not externally balanced.
Much of this confusion is caused by:
1.Chevy zero balances the flywheel and pressure plates as a unit so the flywheel alone may not be zero balanced
2.Chevy refines the balance of Vette engines after they are assembled by pressing small weights into pre-drilled holes in the flywheel & damper as determined by spinning the engine as an assembly
3.Chevy did not refine the balance of Camaros so they will not have the small weights
4.New replacement dampers are zero balanced
5.Used dampers from a Vette may not be zero balanced if they still have the weights installed
6.Aftermarket flywheels are zero balanced
7.Aftermarket pressure plates are zero balanced

So here are a few chooses when modifying your engine
1.To change only the flywheel or only the pressure plate, match balance to the old value
2.To change the flywheel & pressure plate together:
•match balance an aftermarket flywheel/pressure plate as a unit
•when using a new Chevy flywheel/pressure plate, you can transfer the small weights or match balance

Other options include going back to a zero balance damper & flywheel/clutch by removing all of the weight or zero balancing everything, which is as good as a Camaro balance

Quote:

No, the the V6 crank flange is different.
I just remembered I had these...they aren't confirmed #s

2.8 Flywheel bolt pattern
Center hole - 1.5"
Bolt center to center - 2.375"

5.3 Flywheel bolt pattern
Center hole - 2.085"
Bolt center to center - 3.125"

I did not realize this. I thought you were speaking of redrilling for different a clutch pattern. I'm not so sure redilling the crank flange is a safe thing to do. That is, even if you can find someone that can accurately place the exact size holes properly indexed to the crank centerline. Maybe so, they do it for clutches, but we are talking about removing more material from a critical area. Forget a stock bellhousing. Time for a steel blow-proof Lakewood.

Milling down a LS1 flywheel to fit the 148 ring gear may be the way to go.