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My 496 project, the dyno results are in
1 Attachment(s)
Finally got the engine wrapped up and on the dyno, made the last pull wednesday morning.
https://www.yenko.net/attachments/275926-A_33_dyno.jpg I'll have the dyno sheets sometime next week, and I'll have all the info condensed and on my webpage a.s.a.p. There is some very useful info to be shared which I think you should find quite interesting, if not surprising. Oh, btw...I HAD a video of the engine making a pull on the dyno, but for some mysterious reason, my piece of ^&$^#&*@*@^&^$%& Sony camcorder deleted it while I was loading it onto my computer. To say I was furious would be a bit of an understatement. https://www.yenko.net/ubbthreads/imag...emlins/mad.gif https://www.yenko.net/ubbthreads/imag...emlins/mad.gif https://www.yenko.net/ubbthreads/imag...emlins/mad.gif More later. Eric |
Re: My 496 project--a sneak peek
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Re: My 496 project--a sneak peek
Why, I did, of course...both of them. https://www.yenko.net/ubbthreads/imag...mlins/grin.gif
I started with a "correct" `67 L78 carb (LIST 3910) to start, then switched to a `67 L88 Corvette carb (LIST 3418). Eric |
Re: My 496 project--a sneak peek
Keep the photos/info coming!
Good looking... https://www.yenko.net/ubbthreads/imag...lins/beers.gif -Dan |
Re: My 496 project--a sneak peek
Psssst, your headers are on backwards! https://www.yenko.net/ubbthreads/imag...lins/smirk.gif Can't wait to see the dyno results. That suks losing the video of it though.
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Re: My 496 project--a sneak peek
Eric, Cool!
BTW...check your computer over again. I had the same thing happen with my Sony camcorder...where it said it deleted the video...but I found it by searching the newest added files first... https://www.yenko.net/ubbthreads/imag...mlins/hmmm.gif |
Re: My 496 project--a sneak peek
Dan;
Thanks. As soon as I get the results sorted out and posted on my site I'll post it in this thread. https://www.yenko.net/ubbthreads/imag...lins/beers.gif Jeff; Ssssshhh....that's a speed secret https://www.yenko.net/ubbthreads/imag...ns/naughty.gif https://www.yenko.net/ubbthreads/imag...mlins/grin.gif Bruce; No luck...it's gone on into that great video file in the (cyber)sky. https://www.yenko.net/ubbthreads/imag...lins/dunno.gif Just a brief gloss-over on the engine--it was built to resemble a stock L78/LS6 in appearance. It does have an aftermarket rotating assembly, but the only non-OEM parts in it that can be considered "power producers" are the longer stroke (4.25") and a surprisingly docile solid lifter cam. The heads have absolutely NO portwork or any other "tricks" done to them, and even still retain their measley 1.72" exhaust valves. The intake is a stock 163 provided by none other than our own WILMASBOYL78, and the only thing it's had done was milling out the plenum divider. The rest of the engine is painfully stock. You'll just have to wait `till next week for the rest. Oh, one last thing; they dyno facility I use is equipped with an older Heenan & Froude dyno that is very, very conservative, or in the owners own words, "stingy"...which is just the way I like it. As such, don't expect to see some bogus, fluffed-up "west coast magazine"-type dyno numbers from anything I build & dyno. These are honest, real-world numbers. Eric |
Re: My 496 project--a sneak peek
whats the prize for guessing the HP.
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Re: My 496 project--a sneak peek
We need an update on the 496!!!!
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Re: My 496 project--a sneak peek
I'm still waiting on my dyno sheets. https://www.yenko.net/ubbthreads/imag...lins/dunno.gif
I'm told I should have them in a day or two. |
Re: My 496 project--a sneak peek
Are they still using those slow old dot-matrix printers?...
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Re: My 496 project--a sneak peek
This dyno doesn't have the modern software that spits out a nice tidy dyno sheet with all the amth already done for you, much of it (like brake specific fuel consumption numbers) has to be calculated seperately, which is then written down by hand. Not exactly convenient, but it works.
I'm getting impatient too! https://www.yenko.net/ubbthreads/imag...lins/frown.gif Eric |
Re: My 496 project--a sneak peek
540HP give or take a couple.
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Re: My 496 project--a sneak peek
568 hp
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Re: My 496 project--a sneak peek
Is it like The Prices Right, without going over???
Then I say............569 |
Re: My 496 project--a sneak peek
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Re: My 496 project--a sneak peek
The dyno sheets are finally in!
I hope to have everything sorted out & posted on my site by the end of the day. I'll post back as soon as it's done Eric |
Re: My 496 project--a sneak peek
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Re: My 496 project--a sneak peek
Eric - nice job. Very detailled and informative account of your build and dyno pulls. Thanks for taking the time. Nice NUMBERS!!!! https://www.yenko.net/ubbthreads/imag...lins/beers.gif
https://www.yenko.net/ubbthreads/imag...ins/3gears.gif https://www.yenko.net/ubbthreads/imag...ins/3gears.gif https://www.yenko.net/ubbthreads/imag...ins/3gears.gif https://www.yenko.net/ubbthreads/imag...ins/3gears.gif https://www.yenko.net/ubbthreads/imag...ins/3gears.gif https://www.yenko.net/ubbthreads/imag...ins/3gears.gif https://www.yenko.net/ubbthreads/imag...ins/3gears.gif https://www.yenko.net/ubbthreads/imag...ins/3gears.gif https://www.yenko.net/ubbthreads/imag...ins/3gears.gif https://www.yenko.net/ubbthreads/imag...ins/3gears.gif |
Re: My 496 project--a sneak peek
Thanks Sam.
Surprising how much the little things many people take for granted can affect output, isn't it? There's still more in store for it too. https://www.yenko.net/ubbthreads/imag...ns/naughty.gif https://www.yenko.net/ubbthreads/imag...mlins/grin.gif Eric |
Re: My 496 project--a sneak peek
Eric, Really good information and an excellent presentation. Thanks https://www.yenko.net/ubbthreads/imag...iggthumpup.gif https://www.yenko.net/ubbthreads/imag...iggthumpup.gif https://www.yenko.net/ubbthreads/imag...iggthumpup.gif
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My 496 project, the dyno results are in
Greg;
Thanks. I have almost as much time in writing that up and doing the photography as I did doing the engine build itself! https://www.yenko.net/ubbthreads/imag...lins/laugh.gif Eric |
Re: My 496 project, the dyno results are in
Super job, Eric...awesome reading, and great numbers!
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Re: My 496 project, the dyno results are in
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Re: My 496 project, the dyno results are in
No prob...it's nice to remind folks just how good those factory parts are!
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Re: My 496 project, the dyno results are in
Eric............What is the Engine going in?? https://www.yenko.net/ubbthreads/imag...mlins/hmmm.gif......Great Job on the Build https://www.yenko.net/ubbthreads/imag...lins/drool.gifand the Tuning Details from the Dyno......... https://www.yenko.net/ubbthreads/imag...iggthumpup.gif https://www.yenko.net/ubbthreads/imag...iggthumpup.gif
Ken |
Re: My 496 project, the dyno results are in
Wow Eric https://www.yenko.net/ubbthreads/imag...ns/shocked.gif
what a write up...when do you find time to restore carbs? https://www.yenko.net/ubbthreads/imag...ns/worship.gif |
Re: My 496 project, the dyno results are in
Ken;
Thanks. https://www.yenko.net/ubbthreads/imag...lins/beers.gif The engine will be going into my `67 Chevelle SS396 project, which is currently in limbo while I try to locate a rotisserie to borrow/rent. Dave; Thanks. https://www.yenko.net/ubbthreads/imag...lins/beers.gif Compared to building engines and trying to get this car restoration completed, the carb restorations are the easy part! lol! Eric |
Re: My 496 project, the dyno results are in
Eric, Thanks a bunch for sharing your work and research!! I enjoyed every word of it. That is going to be one fun Chevelle!!!!!!
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Re: My 496 project, the dyno results are in
Wow, Great stuff Eric, already sent the build story to a couple of by Bud's.
I have to go back and read in again so it all sinks in. Thanks for your efforts in posting. Mike |
Re: My 496 project, the dyno results are in
Eric,
Excellent write-up and presentation. My hat's off to you. https://www.yenko.net/ubbthreads/imag...ns/worship.gif I think I've finally made my mind up about how to do that proposed L-88 project. GAME? Steve |
Re: My 496 project, the dyno results are in
Steve;
Thanks! https://www.yenko.net/ubbthreads/imag...lins/beers.gif Re: the L-88...Absolutely! I'm ready whenever you are, just say the word. https://www.yenko.net/ubbthreads/imag...ins/3gears.gif Eric |
Re: My 496 project, the dyno results are in
Stop the presses!
The 496 dyno video has been rescued!!! https://www.yenko.net/ubbthreads/imag...lins/beers.gif https://www.yenko.net/ubbthreads/imag...lins/beers.gif https://www.yenko.net/ubbthreads/imag...lins/beers.gif (long story, don't ask how/where it was hiding, you wouldn't believe me if I told you) If you'd like to see the clip, click here. The link is at the bottom of the page. (this was one of the early pulls before we got everything sorted out) Eric p.s. I'll have another dyno video hosted on my website in the next day or so; I didn't have anything to do with this particular build, but the engine is so insanely cool I had to capture it on video. What is it?....well, I really don't wanna let the cat outt'a the bag just yet, but I will say that it'll knock your "SOHC"s off! https://www.yenko.net/ubbthreads/imag...ns/naughty.gif https://www.yenko.net/ubbthreads/imag...mlins/grin.gif Old school ROCKS!!!!! https://www.yenko.net/ubbthreads/imag...iggthumpup.gif |
Re: My 496 project, the dyno results are in
I was wondering what was happening with that project!!!Very Cool.
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Re: My 496 project, the dyno results are in
The factory stuff is very good on the 496. I had cast iron Square ports on my nova with the ls6 style intake and it made 490 to the tires. Switched over to brodix heads and a air gap and only picked up 40 rwhp but 80 lbft torque. Very nice write up.
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Re: My 496 project, the dyno results are in
Chris;
Thanks. I'll be adding quite a bit more info on my website on the Chevelle build as soon as I get caught up on my carb work and have some time to work on the Chevelle again. I have the new oil pan in now, but I haven't even had time to install it yet. https://www.yenko.net/ubbthreads/imag...lins/crazy.gif As soon as that's wrapped up, the engine & trans go in. The dash & wiring will be next on the "to do" list. Jeff; Thanks. I've only scratched the surface on this build in regards to what these factory parts are capable of. There's still significant power left waiting on the table, but we'll get to some of that when the project enters the 2nd phase of its build. Along those lines, I'm not taking this build to the "extremes" as I've done in the past; this is all about showcasing how well these factory parts can work with only minor modifications when the overall combination is dialed in. Eric |
Re: My 496 project, the dyno results are in
Very nice write-up, Eric. Interesting that "Ohio George" did the dyno runs. His shop did a rebuild on my 69 COPO Camaro's motor back in 1977 and they are still at 716 Brantly Ave in Dayton, OH https://www.yenko.net/ubbthreads/imag...mlins/cool.gif!
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Re: My 496 project, the dyno results are in
Eric, Thanks for the updates. I have been considering a 496 and your right up is the best I have seen. I be right here on the edge of my seat waiting for more. https://www.yenko.net/ubbthreads/imag...ins/3gears.gif
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