V1 Engine Angle in Chassis

[RobC76]

Can anyone tell me what angle the engine sits in chassis with rotated mounts.
also what the measurement is from floor to bottom of rear knee ball joint.
Thank you

 

[RobC76]

Just realized how stupid second question was. Looking for bottom of cradle at mounting points to floor.
I’m working on tubular control arms and no strut. Instead coil over. Has anyone done away with stock cradle?

 

[Ross]

Can anyone tell me what angle the engine sits in chassis with rotated mounts.
also what the measurement is from floor to bottom of rear knee ball joint.
Thank you

What are "rotated mounts"?
The front of the subframe is up higher than the floor pan. Is this the measurement you want?

The subframe is almost 9" away from the floor pan.

The floor pan is 5.375" off the floor,

The frame is about 6.75" off the floor.

So that would put the floor pan at 1.375" lower than the bottom of the subframe... at the rear firewall in the Goblin.

 

[RobC76]

Thank you so much Ross. I was referring to the ZZP rotated trans mount. It raises the rear to help with unwanted wheel hop.

 

[RobC76]

 

[Ross]

Well my supercharged LSJ engine has the hard mounts made by DF. I don't know anyone running those rotated mounts, as I don't have wheel hop. Is this a front wheel drive issue?

 

[Vwsaabvt]

I don't think you're going to need those for your build, the engine and transmission mount directly to the frame at the upper mounts and you can get solid lower mounts .

 

[Gtstorey]

Can anyone tell me what angle the engine sits in chassis with rotated mounts.
also what the measurement is from floor to bottom of rear knee ball joint.
Thank you

Do you currently have a Goblin or planning a future build? The reason I'm asking is that if I was building a new subframe. I would just hang the engine and trans from the frame and build the subframe to it.

 

[Dale E]

Hello,

So what are you trying to do exactly. Do you have a Goblin frame already? Are you building a Goblin? Or just developing a new rear subframe to carry an independent suspension? First, thing I would do is go to a pick and pull and get a Cobalt subframe/cradle, then make you measurements from that. The Pontiac Fiero boys have already done a tube frame that is probably close to what you are thinking and you can find images on the internet.

What are you going to hook your UCA to - (you will need a Goblin chassis or the measurement for that -- maybe?) Or are you not going to use an UCA and do the Triangle type independent suspension that just mounts to the lower subframe? What are you going to attach the coil-over to? Are you making a conventional coil-over from LCA to frame, or are you doing an inboard shock build? If inboard shock arrangement were you thinking convention type, push or pull rod type? What angle mounting of coil-over -- upright or a degree angle of what degree? All will determine the spring rate used-- (250 or 600 +- range) and will also determine the mounting points.

You're asking questions of the Goblin folks and they are attempting to understand what you are doing, but -- you have not given them where you want to end goal at; simply asking for measurements is going to get you close, but without a solid foundation it won't be correctly done.

There are a couple of folks on the forum that have made a more independent rear suspension attempt. Have you read those post for their efforts and trials? Lonnie has a new design, but it is still in developmental testing.

Different ideas have been floated, and some mocked up and video tested. Even the tube subframe. But, they are not publicly released efforts.

There are many different ways to approach this and have been imagined already.

Just trying to figure out where you are going with this adventure.

Dale

 

[RobC76]

Thanks Dale
Yes all great questions. Let me start out by saying my current build is not a goblin although I would like to build one after this project is complete. The build I’m working on currently is a Kelmark GT that was intended to be built on a vw pan. VW pans absolutely had a place but they are not really what I’m going for. The Kit itself was purchased by my father in early 80’s. It was going to be a project for him and I but like many things in life don’t go as planned. Dads gone and I have my own kids that I want to build a couple cars with just to expose them to mechanics more. I currently have a LSJ with a F35 mocked up in a stock cradle and I have cut the back half of the vw pan off. I originally thought I would just mate the subframe up to the vw pan at the correct wheelbase and ride height. Quickly I figured out that I have no idea where the subframe is supposed to mount in relation to control arm and half shaft angles at ride height and also inclination of subframe from front to rear in chassis.I reached out because I wanted to try and duplicate the Goblin mounting points so if (when) I do buy a goblin kit I can build another tube back half for my build. I reached out to Goblin to see if they would sell me a front suspension and some parking brake components and was told she was forwarding my email to Adam but did not hear back from him. (Maybe the email got hung up) I also tried buying an 09 LNF cobalt I knew of but the owner has a deal pending. That’s when I decided to just go tube frame front and rear clips and build control arms for upper and lower as well as front and back. Might be a little ambitious due to the geometry and engineering to make it work well. But I think it will be a better driving vehicle in the end. Another reason I think I need to go away from the stock struts is because they are just to tall for the body. I’ll post some pics of the project and would appreciate any constructive criticism and or ideas.
Thank you

 

[RobC76]

This might help as well.
Thanks Again

 

[Gtstorey]

I think your best bet would be to find a goblin near you and take measurements. If that isn’t possible maybe provide a sketch of what measurements you want.

 

[95Blitz]

Rob you need to start a build thread in the Other Builds section for this build. I really like the idea you have and would like to keep up with the build.

 

[RobC76]

So another question on this subject
Can someone get me the measurement between the bottom of the bottom roll bar and the bottom of flange that the subframe mounts two. Picture I included sucks but it’s for reference. My guess is about 3 3/4”