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FrankenFerrari - V12 ferrari 308 part 4 http://gemellocattivo.com/forum/viewtopic.php?f=2&t=319 |
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Author: | TheDarkSideOfWill [ Tue Dec 14, 2021 1:11 pm ] |
Post subject: | Re: FrankenFerrari - V12 ferrari 308 part 4 |
mk e wrote: replacing the front (iirc) motor mounts with daytona mounts which are I guess the same size but solid rubber... Why can't you just do this? Since your V12 is smoooooooooth as glass, you don't need floppy engine mounts designed for a buzzy flat crank V8. Each bank has an up-down shake, but two banks 90 degrees out of phase together produce a rotating couple.... FYI. mk e wrote: Stupid simple part...stupid complicated explanation but it's been on the to-do list a long time and with the engine running (and even running badly still making enough torque to spin the 285 tires) and the cam cover coming off it seems like time to get it done. Don't do that... Your cover is so much nicer without the dogbone mount, and I don't think you need it. 4 engine mounts is enough, as long as they can take the loads indicated by axle torque divided by the fore/aft distance between the mounts. |
Author: | mk e [ Tue Dec 14, 2021 1:42 pm ] |
Post subject: | Re: FrankenFerrari - V12 ferrari 308 part 4 |
TheDarkSideOfWill wrote: mk e wrote: replacing the front (iirc) motor mounts with daytona mounts which are I guess the same size but solid rubber... Why can't you just do this? Since your V12 is smoooooooooth as glass, you don't need floppy engine mounts designed for a buzzy flat crank V8.. Just is as goldsmith did with 2 is wrong but all 4 would would work and is something I'm considering. He complained about vibration with 4 but.....yeah. I remember somebody found a urethans mount....mustang I think that was nearly a bolt-in but I'm remembering they failed with heat......Sean it was, I'll reach out. If I do add an arm is will be not be 2V style ......whatever I do will be neat. |
Author: | TheDarkSideOfWill [ Tue Dec 14, 2021 2:13 pm ] |
Post subject: | Re: FrankenFerrari - V12 ferrari 308 part 4 |
mk e wrote: TheDarkSideOfWill wrote: Why can't you just do this? Since your V12 is smoooooooooth as glass, you don't need floppy engine mounts designed for a buzzy flat crank V8.. Just is as goldsmith did with 2 is wrong but all 4 would would work and is something I'm considering. He complained about vibration with 4 but.....yeah. I remember somebody found a urethans mount....mustang I think that was nearly a bolt-in but I'm remembering they failed with heat......Sean it was, I'll reach out. If I do add an arm is will be not be 2V style ......whatever I do will be neat. Where's your machined level pad for balancing a silver dollar on while the engine is idling? V12's are smoooooth... Don't worry about how stiff the mounts are. I have 4 point urethane mounts on my cross-plane V8 and plenty smooth for me... certainly smoother than the stock 2.8 V6 on urethane mounts. |
Author: | kens [ Tue Dec 14, 2021 2:51 pm ] |
Post subject: | Re: FrankenFerrari - V12 ferrari 308 part 4 |
I fabricated a urethane mount using black skate board wheels. A wide variety of durometers are available. |
Author: | mk e [ Tue Dec 14, 2021 3:08 pm ] | |||
Post subject: | Re: FrankenFerrari - V12 ferrari 308 part 4 | |||
kens wrote: I fabricated a urethane mount using black skate board wheels. A wide variety of durometers are available. Interesting, pics? here are modified mustang mounts a few have fitted
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Author: | mk e [ Tue Dec 14, 2021 11:11 pm ] |
Post subject: | Re: FrankenFerrari - V12 ferrari 308 part 4 |
Sean says the mustang mounts failed pretty quickly and are not worth bothering with so I'd need a different solution. |
Author: | kens [ Tue Dec 14, 2021 11:39 pm ] | ||
Post subject: | Re: FrankenFerrari - V12 ferrari 308 part 4 | ||
mk e wrote: Interesting, pics? Repair of the broken bracket has been pending, thanks for the reminder.
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Author: | mk e [ Wed Dec 15, 2021 8:58 am ] | ||
Post subject: | Re: FrankenFerrari - V12 ferrari 308 part 4 | ||
I was ALMOST able to put the rear cam cover. When the intakes are off this time I'll add a bevel to the outside edge so the cam covers will clear incase there is a next time. I thought it kind of cool the the cover bolt bosses dropped right into clearance around the TBs like it was planned.....sometimes I amaze myself Attachment: I'm now told the urethane mustang mounts fail in sort order and are not worth bothering with. Looking quickly this morning I could lower the stock torque arm and mount it to the rear edge of the cam cover....that wouldn't look bad. Attachment: Attachment: There is of course no car structure to bolt it to in that location, just a sheetmetal panel so that would be additional work to add but not a lot of work I guess. Still thinking
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Author: | TheDarkSideOfWill [ Wed Dec 15, 2021 10:25 am ] |
Post subject: | Re: FrankenFerrari - V12 ferrari 308 part 4 |
It's almost like you spent years building it specifically to achieve sub-millimeter clearances everywhere. Clearance is clearance like the machinists say. You just need to get 4 Daytona mounts and call it solved. Do they bolt in place of the 308 mounts? Edit: Nearing the end of my project, I jump at every chance available to buy something that bolts in so that I don't have to make yet another thing every time I turn around... and I haven't done a fraction of the fabrication you have. |
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