My 1988 LFX F40 build. (Page 32/68)
Daryl M APR 11, 04:05 PM
A stock GT bar won't fit. The swap put stuff in the way, which is why it is now located where it is.
mender APR 11, 10:36 PM
A rear bar that has a centre section that is 0.75" in diameter but otherwise is the same as what you have will match the rate of the stock '88 GT rear bar.

[This message has been edited by mender (edited 04-11-2020).]

Daryl M APR 14, 12:56 AM
So, in theory, I could anneil the bar I have, turn it down to size, then heat treat it again and have a better bar?
Daryl M APR 15, 04:25 AM
Mender, where can I find the formula for the calculation you used for spring rate?
RandomTask APR 29, 05:32 PM
Daryl, hope all is well.

I might have "found" the issue you missed. The decklid spring; when you close the deck lid, will the following interfere with the valve cover?

I was comparing your setup to my current. I bought some mounts from linsells and they seem to position the motor about an inch FWD from where yours is sitting, Which is why I started looking at clearances...

Daryl M MAY 01, 02:33 AM
Yes, the spring was close. It didn't actually touch, but it was close enough for me to decide to make a change. Considering a gas tube lift setup. I'll see what I can come up with when I get back to work on the car. Building a SheShed for my wife right now.
RandomTask MAY 04, 06:23 PM

quote
Originally posted by Daryl M:

Yes, the spring was close. It didn't actually touch, but it was close enough for me to decide to make a change. Considering a gas tube lift setup. I'll see what I can come up with when I get back to work on the car. Building a SheShed for my wife right now.



Good deal! I took that one off. I *might* take both off, but thinking that through. I'm catching up to you though... decided to replace the timing chain just to be on the safe side.





Should be getting my other cradle and suspension pieces back from blasting later this week. With any luck, I'll be doing a test fit this weekend.
Daryl M MAY 05, 09:43 AM
Looks like you are making progress. Looks good!
Will MAY 05, 11:01 AM

quote
Originally posted by RandomTask:


Good deal! I took that one off. I *might* take both off, but thinking that through. I'm catching up to you though... decided to replace the timing chain just to be on the safe side.





Cool. They went with a two stage timing drive like the Northstar, but because the engine has split crank throws, the bank offset is much larger than the Northstar's allowing the one-in-front/one-behind relationship of the secondary chains to the primary chains.

It's also pretty wild how intricate the front cover casting for that engine is.

[This message has been edited by Will (edited 05-05-2020).]

Daryl M MAY 07, 01:03 AM
I just watched a show on Prime called Enginemasters. They were doing power comparisons to test some engine mods. They severely dented headers to see what it did to the power. End result, it didn't matter. Earlier in this thread we discussed exhausts. I thought it was interesting to see the comparison.