Damper plate
 

On ebay is hughe offer for Damper plate with prices from 90 $ to almost 1.000 $.
Which one is recomended for SL engine with:
- 480 hp.at 575 rpm
- 475 lbft torque at 4.500 rpm
- 6.000 rpm max.
flex plate have 14" and all it is connected on ZF Hurt transmision 63A.
All together we plane 50-80 working hours/year mostly by 4.000-4.500 rpm where have engine 450 to 475 lb ft,

come back with the ebay ad or item number

10 spline or 26 spline input. here is 10 spline. Damper Drive Flex Plate for Volvo Penta Marine ZF Hurth replaces 841892-3 eBay here is 26 spline. http://www.ebay.com/itm/Centa-Marine...VZscCg&vxp=mtr if you add hurth to your search it removes the thousands of velvet drive plates and everything else. now, from what I hear, the standard chevy bell housing bolt pattern fits 5 of the 6 bolts on the rear wheel drive ls engine. BUT there is .4 inch diff in flywheel to mounting flange distance. your best bet is to talk to the people who sell these and find the ls engine forum.

Is this to bad? Marine Drive Plate GM Chevy 454 Damper 26 Spline 7K2C 1004-650-007 BBD3131UL | eBay

ZF 63A have 26 spline.

don't know. can Hurth zf trannys bolt up to velvet drive adapter plates? they both say 26 spline. doesn't mean they work. will ANY work with the 4/10th inch diff in spacing using an LSx engine? I still think since there are so many more old-style engine options for you in Europe, you are better off with that. AND, running a Hurth trans implies more low-rpm use than an outdrive typically runs. the LS engine still makes less torque in the 3k rpm range than the old iron stuff. BTW, what trans, flywheel, adapter plate do you have now? what engine came out? or is this a scratch build and you are buying the parts as you go?

This engine Chevrolet LS3 376/480 480hp V8 Crate Engine - 19301358 Partsworld Performance
With this Kit LS376/480 Controller Kit Partsworld Performance
With this Kit minus Air conditioning parts Accessory Drive System For LS3 & LS7 Engines (CTS-V) Partsworld Performance
With this bell housing Marine Power Top Mount Starter Bell Housing eBay
With this starter Marine Top Mount starter for Standard Rotation Engine eBay
With ZF 63 A Hurt with 1,56 transmission.
With this exhausts Exhaust Systems: 123215 - 4 inch H.P. Manifold & Riser set Black P.C. Chev 6.0 LS Series. <br><br> Light Weight and No Rust - Gain 15 - 50 Horsepower from California Marine.

Engine and PVP Kits will arrive before new year, bell housing andnstarter will arrive in october, exhaust kit will arrive in january, heat exchangers,water pumps, ZF 63 A and other rigging parts we have on boat. Power steering we recived together with MSA Marine Systems, we have 26" Maximus ST labbed prop.

At themoment I have troubles to find correct and not to expencive damper plate, other parts mostly we have there, or ordered. Any spacers etc we could build at home, we have machinery there.

Engine have originally instaled flex plate 14", but I do not know should I change it with flywheel or not?

yes you will HAVE to relace the flex plate with a clutch flywheel. AND you will need a flywheel with the ring gear on the back side of the flywheel for the different starter location. I don't know if they make one. standard flywheels come with ability to move ring gear to other side of flywheel. you can PROBABLY use the standard starter in the standard location if correct flywheel cant be obtained.

Thank you, will do it.
http://www.partsworldperformance.com...gines-12571611
It mean we need to drill in flywheel connection coils for damper plate?

looking at LS3 flywheels it looks like ring gear can only go on front of flywheel, so you are limited to block (lower) mounted starter. top mount wont engage ring gear.

Thank you wery much for this advices!!!
First will wait that engine arrive and search flywheel and damper plate later. Only 50 km from me in Austria it is service for PCM and Indmar. Will visit them for this isue, perhaps with engine on trailer.
Is it flex plate to light to not be suitable for marine use?
(Foto on left bottom.) Flexplate For all LS Series Engines | Partsworld Performance

You need the rotating mass of either the flywheel or the torque converter to keep engine spinning smoothly at low rpm. Otherwise each compression will slow engine down and each fire will speed engine up. Plus, put it in gear and it will stall. Flywheels. I don't know if the LS engine is external or internal balance. Fairly sure external. I also don't know if balance changes with engine displacement. I THINK it does. So the different stroke cranks and different weight pistons will-I believe-want a different balance flywheel. EDIT: OK, apparently these are all internal balance engines. on some corvettes they fine tuned the balance while they didn't bother on Camaros. so some will look like external balance. some of these ebay flywheels say ls1,2,3,7 all the same. some say ls2,3,7 need different flywheel from ls1. so, take your time, do some homework.

Nice homework, will do it.

At the end of description by Technical information write: Balanced: Internal
http://www.partsworldperformance.com...ngine-19301358