Sachs flywheel question
Sachs flywheel question I am putting an LS1 into my 67 Nova. Car already has 621 bellhousing , tko600 trans (26 spline) and Keisler hydraulic TOB. I either need to shim the TOB out 0.400" or use a 0.400" thicker flywheel. Since Keisler is out of business I am assuming I will need to use the Sachs flywheel. I will need to get a mini starter to clear the headers. I have a couple of questions:
1) Will the mini starter work with the Sachs flywheel? (i.e. Powermaster 9509)
2) How does the pressure plate stay balanced with the locating dowels removed?
3) Can basically any 11" clutch work with this flywheel if you drill out the pressure plate mounting holes?
4) How much more does the Sachs flywheel weigh than the LS7 flywheel?
thanks
Joe
1) Will the mini starter work with the Sachs flywheel? (i.e. Powermaster 9509)
2) How does the pressure plate stay balanced with the locating dowels removed?
3) Can basically any 11" clutch work with this flywheel if you drill out the pressure plate mounting holes?
4) How much more does the Sachs flywheel weigh than the LS7 flywheel?
thanks
Joe
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I bought a sachs for my swap (using a nv4500) but wouldnt work with my mcleod rst clutch I believe they are 10" or something like that? THe sachs is around 30-35 lbs if i had to guess. Mcleod makes a conversion flywheel too 460535 i believe is the part number. another option but pricey ar 400$
Any starter that works with the LS1 should work with the Sachs flywheel. All are interchangeable (if the bolt pattern matches) as far as I've noticed.
I'm running a Sachs flywheel with a TKO600 and a SBC clutch kit with the dowels removed and some minor grinding. I haven't had any issues turning 7000 RPM on a regular basis.
I'm running a Sachs flywheel with a TKO600 and a SBC clutch kit with the dowels removed and some minor grinding. I haven't had any issues turning 7000 RPM on a regular basis.
Any starter made for f body LS will work. GTO starter is different.
I reamed the 3 holes just big enough to fit the bolts. I would suggest having that balanced though.
Any earlier Gen 11" car clutch will work.
Sachs flywheel weighs 26lbs, not sure on the LS7.
I reamed the 3 holes just big enough to fit the bolts. I would suggest having that balanced though.
Any earlier Gen 11" car clutch will work.
Sachs flywheel weighs 26lbs, not sure on the LS7.
I would never run a clutch that wasn't centered by dowel pins. Just because and engine revs to 7000 rpm doesn't mean the bearings aren't being hammered to death.
Andrew
Andrew
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Verdad Gallardo Hi Gary, your research and contributions to this solution have been amazing. I have read through that thread a few times. I guess my main question is, do you know what clutches will bolt up to the sachs flywheel and utilize the dowel pins? I am leery about running without them.
thanks
Joe
thanks
Joe
The 05 truck pressure plate presumably has the dowel pin hole. I just doubt it will fit in the 621 bell. The disk is 1/2-3/4" larger.
Why not buy the old school GM 11" clutch. Ream the 3 holes just big enough to keep it in place. Then have it balanced?
Why not buy the old school GM 11" clutch. Ream the 3 holes just big enough to keep it in place. Then have it balanced?
Around 72 GM transitioned from a 10 to 26 spline input.
A 73 chevelle, corvette, etc with a big block will have an 11" clutch with 26 spline shaft.
A 73 chevelle, corvette, etc with a big block will have an 11" clutch with 26 spline shaft.
Is the "height" of the pressure plate fingers on clutches all the same? What I'm getting at is, do these clutches ride any closer or further away from the TOB than others? Perhaps this could make up the 0.400 that the flywheel sits away from the trans?
You're asking the wrong question.
The 0.4" difference between running an f body LS1 flywheel vs the sachs will result in the clutch disc splines running off the end of the trans input shaft with the shallower f body flywheel.
The height of the pressure plate fingers may very well be different between clutch manufacturers. That's irrelevant to anything other than throwout bearing length and geometry. The shallower f body flywheel simply uses a 1/2" longer throwout bearing compared to the sachs. An adjustable fork pivot ball makes the geometry more adjustable.
See this article:
http://www.novak-adapt.com/knowledge/clutches_etc.htm
The 0.4" difference between running an f body LS1 flywheel vs the sachs will result in the clutch disc splines running off the end of the trans input shaft with the shallower f body flywheel.
The height of the pressure plate fingers may very well be different between clutch manufacturers. That's irrelevant to anything other than throwout bearing length and geometry. The shallower f body flywheel simply uses a 1/2" longer throwout bearing compared to the sachs. An adjustable fork pivot ball makes the geometry more adjustable.
See this article:
http://www.novak-adapt.com/knowledge/clutches_etc.htm