torquer II to rpm

currently have a tII on a 460-274H cam-800dp holley.engine currently holds 17 in vacuum at 1000 rpm idle. What difference in idle quality,and low end torque could I expect switching to a performer RPM ?

I suspect that the cam would change the vac more than the manifold. Do you want the vac to go up or down?

No,I just thought the vacuum might be help ya"ll give me an idea of what a dual plane would do. The TII is what fits under the hood, but a little more low end is what I want.Really dont want to go smaller on the cam and keep the single plane.If I could get a little more bottom end with a manifold change without giving up much on the top(6000 rpm max) Iwould go through the effort to cut the hood up for a scoop.By lookig at the plugs the fuel air distribution at low rpm really is poor on this manifold.I guess it is probably just the way a single plane is.

meandad wrote:No,I just thought the vacuum might be help ya"ll give me an idea of what a dual plane would do. The TII is what fits under the hood, but a little more low end is what I want.Really dont want to go smaller on the cam and keep the single plane.If I could get a little more bottom end with a manifold change without giving up much on the top(6000 rpm max) Iwould go through the effort to cut the hood up for a scoop.By lookig at the plugs the fuel air distribution at low rpm really is poor on this manifold.I guess it is probably just the way a single plane is.

So, what did the plugs look like at W.O.T. ?

meandad wrote: currently have a tII on a 460-274H cam-800dp holley.engine currently holds 17 in vacuum at 1000 rpm idle. What difference in idle quality,and low end torque could I expect switching to a performer RPM ?

"Low end" torque has just about a different definition to everyone, lol.
Just above idle the Performer will give much more torque and a lot better response. This will diminish a little at a time till about 3,500 RPM when the Torquer II will take over.

A Performer is an inch lower than an RPM and only slightly taller than a Torquer II. If you're gonna cut the hood - use an "Air Gap".

Lem, the plugs look fine at WOT.At idle the middle four are good but the four corners are rich,exactly opposite of what I would have thought.Funny, but that is how most things in my world work out,opposite of how I think they will ! Randy,I was thinking the Performer RPM might get me a bit better idle and low end without giving up much on top end. Wouldnt a Performer be a bad match for a comp. 274h cam? You all have to excuse me,I often have a hard time conveying my thoughts to others so they understand me.More so on a keyboard.

meandad wrote:Lem, the plugs look fine at WOT.At idle the middle four are good but the four corners are rich,exactly opposite of what I would have thought.Funny, but that is how most things in my world work out,opposite of how I think they will ! Randy,I was thinking the Performer RPM might get me a bit better idle and low end without giving up much on top end. Wouldnt a Performer be a bad match for a comp. 274h cam? You all have to excuse me,I often have a hard time conveying my thoughts to others so they understand me.More so on a keyboard.

As I said, "low end" is subjective. Give RPM ranges and throttle opening so there will be a lot fewer mistakes.

Years ago, I once had a jet boat racer trying to convey to me that he needed more "low end torque" and I could'n't understand what he was talking about originally. Turned out that when he stood on the throttle for WOT it immediately went to 5,800 RPM. To him - "low end" was 6,000 RPM and "high end" was 7,000 RPM.
SO, the term "low end" means absolutely nothing unless you KNOW what THAT person actually means.

Oh.OK,I see,well then by low end I mean just off idle (1000).By 1500 the torque is good.From 2500 to 6000 it is down right scary.It just seems one could improve the idle quality of a bit and gain a few ft.lbs. on idle by getting a more even air -fuel mixture at idle and just off.I guess what I want know is how a low rise single plane compares to a good high rise dual plane on a 460,hood clearance not being an issue. By the way,you know it's just a little imtimadating being just a hobbyist asking you fellows who live, breath and s##t this stuff questions without coming off like a total idiot.But it has been fun reading and learning for the last year or so.