Moore testing with oer sheet metal intake for six pack carbs whas great,,, we found almost 20 moore hp and a wery flat power curve. And the trottle respons was awesom.
Moore test is coming.

PPM Racing Sweden

ok, send me one

runners look too long and plenums too small

How things look is one thing,,,,and how it works is another.
Bigger plenum ??? NO!

Can you possibly post some numbers??? 20 hp is great but only if its on top of an already good number.

Nice looking manifold.

the trend for ss/ah motors is definitely not a smaller plenum


the thought or what happens is the larger plenum gives more distance for air/fuel to beable to find its way to the runner being unobstructed by the location of the runner opening and carb placement

you can fill the corners of the manifold to increase booster signal to help it pull fuel at quicker accleration rates,, but it will make more power with a larger plenum,, to a point

long runners and small plenums are for low rpm motors

the reason i say the runner sare too long on the ones pictured above is that i know what the application is,, how small the port cross sections are,, it will peak higher,, by a little,, but way more past peak,, but gain all over with a shorter runner

Quote:

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which brings me to the indy mod man intakes, which have very short runners and and a rather large plenum. I would like to try one but just cant wrap my brain around it being better than what i have.

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I am curious about that intake also. Indy's website doesn't give any hint about what these should be used for. Does anybody know what application Indy recommends this for? What RPM range? How does that large plenum/short runner affect low,mid and high rpm power? How does it compare to other intakes? Actually the stock sixpack intake has a relatively large plenum and short runners also but it of coarse is a 2 plane instead of single plane.

Didn't Edelbrock make a high rise 6 pack that had a changeable top back in the early 80's?
Maybe it was a tunnel ram, with a six pack top I'm thinking of..Or the STR series manifolds..with 6 pak top?
Either way, it had a big plenum too.
Guess I will have to search for the photo I am thinking of...

The mod man is an odd bird for sure, the short speal indy gives is very vague.

So many seem to worry about the mod man being a dog at low rpm, I dont know what others consider low rpm but with my vert im always around 3k3500 putting around but I think full lockup is 4800. But with the six pack its very easy to drive.

With a 1.5 inch spacer the lower end response is much stronger then the oem modified dual plane I was using and the new cam likes 7k so I dont spin it as hard as the prior cam.

I just switched to a diff cam for a bit more cylinder pressure at around 8000 ft here, and as much as I like to run on the streets even with 10.5 slicks its now pointless.

The mod man seems to contradict the norm in alot of ways, being a small block stroker guy its the oem or the mod man, and now setup right the mod man does so much more.

As much as I [Edited by Moparts - Family Friendly Site - Keep it clean] about the cost and the fact of the added time needed to do all the port matching (they all came super small, like a 273 port on the small blocks) Im considering another one vs oem since its so well mannered.

I also would like to hear more opinions on the actual design/function of the mod man intake. But they seem to like wot very well.

MY Mancini welded-up 6 BBL intake that fits the MW heads ... oh ...and it is 4sail(or trade) BTW ...

We have tryed moore Six pack intake than anybody i think, foor the last 3 year, On the dyno and on the track. And we are looking for the intake that is fast on the track , not best on the dyno.Allso on the dyno we whant best avarage hp and a long flat power curve. We have that now with the own design we made. We did not have that with the Weiand, Indy,CFE and Hoogans we tryed.
We got the allmost 20 horsepower at the peak and 20 moore in torge, but 26 moore avarage hp with PPM design compare to CFE Sheet metal.
CFE made the intake and i mean the are one of the best in the industries, did it work ? NO. The have BIG plenum Short runners , no HP gains. AND we could not run it at the track wery bad 60 feet time., the stock Six pack was Way better fromt he startingline.Rebuild it with epoxy longer runners less plenum and it starts to pick up.Same with the Hoogasn ( it is on a engine now ) but it was better littel longer runners and smaller plenum. We have found this out by allot off testing on the same combo so we know what this like. So the trend can be what it is ,but the things that work it works, and on THIS combo this works.
We have the same HP at 6100 rpm as we have at 7500 rpm , and the peak at 6700 rpm and we have over 700 hp.
It is a 440 SS engine with stock ported heads 202 cc runners,2,08 x 1,74 vales,80cc chambers,Stock short block FT pistone and Custome made roller camshaft with 3 step headers.

NICE Peter

Any new pics of my engine, thank god I choose PPM for my new engine build

Carbs will be sent this week and some $ to

Take care my friend.

Jocke

i like that you guys are finding your own path, and doing what works for you

ok found it, I KNEW I remembered it was different than str pile of junk!
Its not edelbrock str, or whatever, its a "Weiand 6 barrel tunnel ram" chrysler part number P3690982 Its a 2 piece manifold, with tunnel ram runners, and a larger plenum.
Plenum top can be changed by bolting different ones on. single 4, dual 4, six-pak...
Theres pics of it in the June 1981 Hot Rod magazine "Magnum Mirada" build up series.
A 440 Mirada they looked at I think it was owned by "Paul Rossi"
You also can get an idea of it, at least the bottom portion and a single 4 top, by looking at item #250851972037 on e-bay.
Which you CLEARLY can see the difference between a STR and this type.
Just for You guys that didnt know.....and thought you did.

if you look at the OP picture that Weiand intake is the first manifold on the left side

Uh Ok, if You think so....
except the weiand plenums, bigger/different and the runners feed from opposite sides and are longer. I guess if it was all that great a manifold, it wouldn't be so rare now.
But Hey...the they Both have a top that bolts on!
and bolt to the heads the same...so they must be the same!
Maybe I am looking at a different photo....

Thank you Jocke,,, we shall get moor picture for you on the 440ci SS Six pack enginbuild

The manifold on this picture that we have tested on the dyno and on the track is from the left:

Weiand,,,Indy with own made top,,CFE,,PPM Racing 2 different style.

And al off them is worked to perform as good as possible. Their is allso a Hoogans that is tested but not on this picture.