SBC Tunnel Ram Dyno Testing 

Thank you for the ED EL BROCK pronunciation. Now I'm going outside to hook up a PVC valve to my Harley carb!!

Just for comparison. Many years ago, scca said you had to run 1 carb. And that got rid of the 1969 Z28 cross ram intake and dual 4 barrels. But that little 302 made some crazy rpm’s and good power. The theory was longer runners of the cross ram would be like a tunnel ram but keep it under hood. I would really like to see how one of those Intakes works on a larger cid e fine like this one.

Finally I wanted to see Street tunnel tam vs Victor ram for a long time. I am curious about the ported street ram also

I would love to see a test of a cross ram intake on your dyno mule.

I remember when ALL those manifolds were brand new! We ran a TR1-Y in 55 Chevy back in the 80's with a set of 660 center squirters on a 350 and got it to run 10,80's. But when that Holley intake came out, I could see it was kickass!!

Can’t forget about the WEIAND tunnel ram that hot rod magazine pumped into my brain pretty much every other magazine for years saying that it made the most torque and the most power out of any manifold, I’d really like to see you get a hold of one of those I don’t think they make it anymore but they’re still fairly common, you used to be able to buy a kit from Summit and it came with 2 450 holley carbs or 2 660 holley carbs

For all you guys crying about not being able to see the graphs you should buy the man’s books. It’s not Eric’s fault your Radio Shack trs-80 computer screen’s clarity sucks. Eric puts this info on RU-vid for free. If you knew how much time goes into making a 20min RU-vid video you wouldn’t be complaining. If you can’t afford a $30 book, you don’t need a race car.

lets see the street ram after some mild porting!

note the "ram" in tunnel ram refers to the sonic wave created by the air charge hitting the intake valve when it closes the pulse travels up the tunnel and when it hits the top it travels back down the runner again and if timed right it will meet the intake valve as its opening ramming a charge of air into the cylinder. One of the reasons why its hard to find an old tunnel ram is most of them are hacked up tuning the sonic wave timing to the engine.

Thank you Mr. Weingartner for all you post. Glad I kept my Pro Dominator with linkages. Full of cob webs but I knew there was a reason not to sell it.

Just for comparison I would 1969 302 Z28 dual 4 barrel Chevy cross ram, maybe one of the aftermarket ones. An Edelbrock Smokey Ram SY1 single 4 barrel cross ram, always liked these: ford Cross Boss Ford 302 with autolight carb and the mopar nascar cross ram.

That's awesome. The pro dominator was pretty neat to see. Once modified it will be interesting for sure.

I know you said the Buffco top looked ridiculous, but on a car, the farther it sticks out of the hood the better, huge style points! Would love to see that Pro Dominator fully ported on a set of your Dragon Slayers! That would make some power!

Thanks for doing this test Eric, I’ve been waiting for this comparison for a while. We’ve got a Dart 400 little M, 215 plat, Crane solid roller, Ed Victor ram with both tops, Holley 830 comp carbs, 1 7/8 headers. As always very informative test, thanks Eric.

That is one cool Video!! So much information, You do a great job on your content and technical techniques it flows well!👍

Good video Eric. The dyno helps to see some difference between the intake styles. As you know the track can show the dynamics. For what you have shown, and my combination I would use the Edelbrock street ram, port matched, with possibly a plenum spacer. I enjoy your videos.

The holly pro dominator was the best intake out there !!! They should’ve never got rid of it !! I still have mine and I am doing another small block and that intake will be on there with boost

The ol Pro Dominator is my favorite!

I'm really starting to think my best bet for my setup I going to be to modify a tunnel ram for EFI with a big front mounted TB.

How much is a ton of power Eric?

Try one of those new dimpled textured spacers , good results

Honestly, the raw numbers in the columns are a pita to decipher on a 72-in screen that I watch your videos on. The graphs are what viewers use to compare differences in runs. I wish you would just stick to the graphs.

This test kind of knocke one of those "everybody knows..." things off its perch. I have heard taper favore top end, but it seems for this motor the opposite was true. Considering the pro dominator is a 70's piece... I'm impressed. And it seems the Street Ram is correctly named. I wonder if results trend similarly on a 434. A dyno is the woodchipper for all kinds of assumptions. Thanks for sharing this test.

I have seen that setup on dragster, Buffco Eric

I've got a Weiand 5989 with 1912 plenum Id like to have ported to the arf227 and run if you like.let me know how to get ahold of you if you want

There is another tunnel ram you missed, the Edelbrock Pro Ram II.....wonder how it would have done. Long discontinued, would have fell in lineage between the Street Ram and Victor Ram

One other thing I just remembered did I miss the test between the AFR 227 and the promax heads that you had programmed and cnc’d after your port design?

i have a short runner v bottom weiend supper ram . tunnel ram was a bill jenkins desighn. have you test this intake sbc

How long does the contest is I am liking the t shirt your son's nova and your logo is pretty cool. I don't know when I will buy one but just curious on how long the contest last or end

HI ERIC great video, how much better do you think the street ram would do after porting? i have one thats going on my 421 sbc with promaxx cnc heads

Like to see the Profiler Sniper in there

Eric I have bbc Weiand tunnel ran you can borrow if you want to try it .

shit, i was thinking this was your 540. i was like, damn that torque seems really low, lol. never mind, haha.

It's a shame Holley stopped making the pro rams. Have you ever done a bbc tunnel ram shootout??

Great info. Just shows if you do not test it then it is all theories.

How do you think the Alkydigger tunnel ram would compare?

Whats the fuel distribution look like???

😮 the more you know

How does the Weiand tunnel rams do, ever test any of them on a bbc?

Single plane better than tunnel ram?

I forgot if you have a 4-7 swap cam?

You don't port cast iron??? 😞 Sinner! 😅

If I could get you a set of gen3 viper heads, would you work on them?

Pumping loss. People forget this important fact when comparing vac sec anything with non vac sec . They will loose every time due to pumping losses