Don Terrill’s Speed-Talk

3rd Harmonic = 43.114 inches long ... greater Low RPM Torque -to- Peak Torque RPM 4th Harmonic = 21.557 inches long ... highly recommended , best Torque and HP Curve combination You should try to place the mufflers to achieve one of these lengths* and add tailpipes if/as needed. *Half way between i...

All bits and pieces salvaged from elsewhere to keep costs down? That's the plan isn't it? Given the designs of today's off the shelf headers, it seems the emphasis, other than the primary tube diameter, is concentrated on the secondaries. Or so is my understanding anyway. Yep, mostly salvaged bits....

Primary tubes are not equal length, but secondary tubes and secondary collectors are money. Drivers side almost complete, all the pieces for passenger side are cut and tacked and ready for assembly.

skinny z wrote: ↑Thu Apr 15, 2021 11:39 pm Lookng A-OK to me.
Good luck with the rest.
Keep updating.
Is there a turbo in the future?

*distant* future, perhaps, if the rest of the car proves to be a good base.

I think not so bad for working with junk. About $48 invested to this point:

Progress has been slow, plus revised design a few times. About to wrap up primary for #1. Status as of 4/12/2021:

It’s cold up here in MI but I’m trying to stay motivated. My budget requires building with salvaged junk, so I chopped up a couple $20 sets of used headers and am doing my best to follow the advice here. Primary tubes for passenger header are mocked up for length (17”) and packaging. 1-1/2 off port,...

If you’re interested in reading a short blurb from Grassroots Motorsports Magazine on my last V8 Corvair (from the $2004 Challenge), here’s a link:
https://grassrootsmotorsports.com/foru ... 367/page1/

I'm hoping the OP can find what he's looking for. Great of Mr Meaux to drop in. Great indeed. I appreciate the analysis for sure. Due to the very tight budget of this build, I’m not going to run through multiple configs of intakes heads cams and exhausts. I have one combo and need to build the best...

Larry, thanks so much for taking the time to run this for me. I really appreciate the info. I’m very early in my fabrication education, just a hack in a small garage trying to build stuff out of scraps, but I’ll post pix here as I progress, if that’s OK.

Larry, thanks for the reply, I appreciate the info.

Skinny Z, thanks for the reply and the link to the other thread. I read that and most of the “related threads” that showed up at the bottom of the page, and several of the threads that showed up at the bottoms of those pages. So much good info! One thing I didn’t see in any of those threads is what ...

I'm new to this forum, and boy am i glad to have found this place. I've been around cars all my life, mostly indy repair shop and DIY stuff with my Dad, until Formula SAE in college (BSME 1991), and I've been a brake engineer in Detroit since 1993. I'm building a car for the Grassroots Motorsports M...