tunnel ram stroker?

There has been a lot of bad information about Tunnelrams on this post. If you dont know what your talking about, dont tell everyone how stupid you are.

JOE SHERMAN RACING ENGINES

Originally Posted by BIGJOE

There has been a lot of bad information about Tunnelrams on this post. If you dont know what your talking about, dont tell everyone how stupid you are.

JOE SHERMAN RACING ENGINES

C'mon Joe... you're better than that! You have been very helpful on other threads without calling people stupid. What information are you referring to? You have probably done some comparisons on a dyno, so I'd like to hear your take on this subject.

Originally Posted by kgordonl

???? Exactly the opposite is true. Tall tunnel rams poking sky high through the hood do not make good torque and bottom end. Even the description on Weiand's High-Ram tunnel ram (which is the one you referenced that Summit and Jeg's use in their combos) says, "NOTE: Due to lack of low-rpm torque, not recommended for everyday street use."
Generally speaking, the higher you raise the carb with an open plenum, the more you push the power band upward and kill off low-end torque. This is true with carb spacers and intake manifolds. Why do you think the low-rise dual plane Edelbrock Performer is designed for low rpm torque and the high-rise single plane Victor Jr. is designed for higher rpm HP?
The street cars I've encountered with tunnel rams are typically over-carbed and make no low-end torque. That's why I said on the other thread that you would get smoked red light to red light on a regular basis. On a Friday night, we used to go looking for street cars with tunnel rams to race. We used to refer to them as... All show and no go!

maybe the summit and jegs reference was a bad idea, and i was speaking of runner length/cross section- not plenum height. my point was the difference between a ram with 10 inch tall runners and one with 3 inch tall runners.

Originally Posted by dfree383

Actualy tunnel rams work quite well and do make good low speed power and torque when tuned properly and when everything is selected right. Their have been alot of test in hot rod and car craft over the last few years.

The first-hand experience I have with tunnel rams is from a few years back, so it makes sense that with the progression of stroker engines, heads, and cam profiles that tunnel rams could be more streetable than they used to be. I bought the RPM intake for my build originally because I had never even considered a single plane intake for a street car in the past. Of course as I discovered, the Victor Jr. works great on these strokers without giving up very much on the bottom end. As Frdnut said, these things make so much torque that it can be beneficial to move the power band up.
However I can't imagine that if I took my Victor Jr. off of my engine and installed a tall tunnel ram with a couple of carbs, that it would have the same responsiveness and performance at lower rpm's on the street.

I happened across this post by Big Joe on another thread:

Tunnel ram, fact or fiction for a 351W?
A tunnelram is only for an engine that can rev well above 7000 RPM. The bigger the engine, the sooner it will catchup and pull away fron a single plane. On a 427 SB Chevy. It would equal the single victor at 5300 and pull away to the tune of a 45 HP gain up at 7500 RPM. On a 355 size engine, it would not catchup untill 6000 RPM, then pull away by 40 HP at 8000 RPM. On a big BB Chevy (545 ci ) You gain an unbeliveable 100 HORSEPOWER at 7500 RPM. JOE SHERMAN RACING

The guys I knew with tunnel rams back in the day definately did not have engines set up to rev above 7000 rpm. They were red-lining before the tunnel ram could even catch up!
I guess if I ever mess with a car that has a tunnel ram sticking out of the hood at a red light one day and I hear him dump the clutch at 6000, I'll know I'm in trouble!!!

What???
I have used many rams where the engine would cap under 6k, and the rams made more power than the single planes.
"On a 355 size engine, it would not catchup untill 6000 RPM"
I just saw a dyno graph from another board where on a chev 385, the ram ran away from a vic jr and a sup vic just after 4k.

ill throw my very limited experience with using a tunnel ram in here..
a buddy of mine acquired a 65 studebaker with a built 283 in it about 7 years ago.
this thing had a weiand tunnel ram with a pair a 390's holley's on it,
cam was unknown,
and it had a 4-speed trans.
this wee 283 was quick,and would rev really fast,
did not loose low end torque and would light the 295/15 street tyres up in the first three gears.
imo,a well setup combo running a ram and a couple of carbs will perform well off idle up to around 7000 like this car did,and for around 6 months we thrashed it often without any problems-
too bad it was the wrong brand and had to go,or it would probably be sitting in my garage today..

I used to run a tunnel ram on a wild 302 ford back in the olden days ,there was no other manifold that would rev free past 6500 . Now that there are good manifolds to run a single quad it makes the car a lot easier to stage. The tunnel ram sure pulls the power uptop but they are not vary nice to drive. A tunnel ram works better with a gear jammer.

Originally Posted by kgordonl

I happened across this post by Big Joe on another thread:

Tunnel ram, fact or fiction for a 351W?
A tunnelram is only for an engine that can rev well above 7000 RPM. The bigger the engine, the sooner it will catchup and pull away fron a single plane. On a 427 SB Chevy. It would equal the single victor at 5300 and pull away to the tune of a 45 HP gain up at 7500 RPM. On a 355 size engine, it would not catchup untill 6000 RPM, then pull away by 40 HP at 8000 RPM. On a big BB Chevy (545 ci ) You gain an unbeliveable 100 HORSEPOWER at 7500 RPM. JOE SHERMAN RACING

I'm trying to imagine a 545" BB that turns 7500 RPM $$

Originally Posted by PaceFever79

I'm trying to imagine a 545" BB that turns 7500 RPM $$

whats so hard to imagine ???? Bigger ones turn more than that !!! I'm guessing you've never been into Race Engines?