eye wrote: Sat Jan 16, 2021 8:13 am
If you are doing that much frame cutting, make sure the trans will drop out from below and not have to pull engine to fix it.
Good call. I may not have room to get the bellhousing bolts out though depending how close I set the engine to te firewall.
I’m not truly a purist, but would say 99% of roadster owners are not going to want to destroy the frame of their vintage roadster to install a Ford engine.
I’d say you have answered the original question of the thread.
I’m not truly a purist, but would say 99% of roadster owners are not going to want to destroy the frame of their vintage roadster to install a Ford engine.
I’d say you have answered the original question of the thread.
Yep, this is not going to be a viable swap for most people. Stick to other options if you don't want to hack away. Before I'm done I expect to have the entire X cut out and convert to a tubular X.
De-value of the hacked frame aside (basically scrap metal), it will take a sh++load of fabrication and welding just to restore a small fraction of the factory rigidity to the frame.
Those rectangular cross sections of the x-member add tremendous rigidity and strength to the frame.
Replacing them with a few plates and tubes is not even close to equivalent. It's one of the reasons roadsters feel so solid on the road.
It's your car, you can certainly do what you want, but I sure wouldn't hack the body like the frame. At least now, the body could be put back on an unmolested frame and saved.
"First do no harm" should really be the slogan for swaps and restorations.
JT68 wrote: Sun Jan 17, 2021 9:30 am
Those rectangular cross sections of the x-member add tremendous rigidity and strength to the frame.
Replacing them with a few plates and tubes is not even close to equivalent. It's one of the reasons roadsters feel so solid on the road.
I had some other high powered roadster owners tell me the frame is so overbuilt that the X is unnecessary. But I've reconsidered and decided to err on the side of caution here and keep the rear half of the X original. I will rebuild the front of the X with more room for the transmission.
JT68 wrote: Sun Jan 17, 2021 9:30 am
Those rectangular cross sections of the x-member add tremendous rigidity and strength to the frame.
Replacing them with a few plates and tubes is not even close to equivalent. It's one of the reasons roadsters feel so solid on the road.
I had some other high powered roadster owners tell me the frame is so overbuilt that the X is unnecessary. But I've reconsidered and decided to err on the side of caution here and keep the rear half of the X original. I will rebuild the front of the X with more room for the transmission.
Yes, there is no shortage of misinformation available for roadsters.
It certainly is a solid frame no doubt, but removing the X will definitely introduce flex in all 3 axes. Since there is no steel roof structure on a roadster, which would firm things up,- the frame has to compensate for that weakness. That is why Nissan built it so well, not to make it "overbuilt" and more expensive to manufacture just for fun.
You just have to drive an underbuilt convertible once to know what chassis flex feels like-bad. Nissan did a good job with the frame- removing the entire X would be idiotic and detrimental. You will definitely want to build a new X, my original point is it will require hours/days of fabrication just to make a X that is 1/2 as rigid as what you hacked away.