[Boostedbird]

Good luck Charlie!

[charlie66]

Originally Posted by BruceWilkie

Build your plenum so you can easily add more. I stated 1.5 x engine displacement...I'd start there.as a minimum. Test and add space and see what it does for you. Pypemax runner length factors the distance from valve center to manifold face.

Bruce, can you tell me how to figure out and calculate intake runner area? Im trying to fill out this calculator over here... http://www.rbracing-rsr.com/runnertorquecalc.html

Thanks.

I couldn't find the pypemax site..

[charlie66]

Originally Posted by Boostedbird

I would have loved to seen that! I like the new Vettes, but most of them guys are really cocky! After the track last night my buddie with the turboed LS Mustang put 3 lengths on a new nitrous Vette that money races around here. That guy has a mouth on him. It was great to see him get smacked on his own road! Sorry! Back to plenums!

That's why when im out I don't say anything. I just smile and say lets go.. Believe or not I haven't lost any roll races yet, and I've raced a lot of cars so far with this lill 4 banger... lol

I did not meet this guy but im sure he was cocky, the good part that I will never see is im sure his friends were all busting on him later on! lol. I bet they will be looking for me next time out...

I bet you and your friend were laughen your azzes of after he smoked that loud mouth guy.. . haha

[charlie66]

Originally Posted by Boostedbird

Good luck Charlie!

Thank you sir.

[Boostedbird]

Originally Posted by charlie66

That's why when im out I don't say anything. I just smile and say lets go.. Believe or not I haven't lost any roll races yet, and I've raced a lot of cars so far with this lill 4 banger... lol

I did not meet this guy but im sure he was cocky, the good part that I will never see is im sure his friends were all busting on him later on! lol. I bet they will be looking for me next time out...

I bet you and your friend were laughen your azzes of after he smoked that loud mouth guy.. . haha

Noone but his friends can stand the guy! His name is Waffles, so now he's pancakes, hotcakes, Ihop....Lol!

[charlie66]

Originally Posted by Boostedbird

Noone but his friends can stand the guy! His name is Waffles, so now he's pancakes, hotcakes, Ihop....Lol!

Now when talks shi$%#t you can just call him a loser to his face and laugh at him ... That will most likely turn him red .. hahaha

[johnta1]

PipeMax

Hopefully Larry's new version will be out.
Supposed to be greatly improved and also power adder ability.

[charlie66]

Can someone tell me if im doing this right.. Im trying to calculate my optimum runner size for my peak toque rpm. I measured my intake gasket height and width 2.335h 1.200 w. x"s it by 2 and came up with 2.802 . My dyno sheet says I made peak torque at 5750 RPM. This calculator says my optimum runner intake area should be 3.22. Im only at 2.80. Am I doing this right? Heres the link.... http://www.rbracing-rsr.com/runnertorquecalc.html


Thanks

[johnta1]

Yes, you are doing it right.

[charlie66]

Originally Posted by johnta1

Yes, you are doing it right.

thank you.

what do you think of these links ?

http://www.enginebasics.com/Advanced...%20Length.html

http://www.gnttype.org/techarea/turbo/turboflow.html

http://www.musclecardiy.com/performa...mance-engines/

http://www.enginelabs.com/engine-tec...ake-manifolds/

http://www.team-integra.net/forum/bl...culations.html

[charlie66]

See how the runners are cantilevering into the plenum? Is this a better idea then having them flush?

[Tom Vaught]

Originally Posted by charlie66

Can someone tell me if im doing this right.. Im trying to calculate my optimum runner size for my peak toque rpm. I measured my intake gasket height and width 2.335h 1.200 w. x"s it by 2 and came up with 2.802 . My dyno sheet says I made peak torque at 5750 RPM. This calculator says my optimum runner intake area should be 3.22. Im only at 2.80. Am I doing this right? Heres the link.... http://www.rbracing-rsr.com/runnertorquecalc.html


Thanks

1.3" wide x 2.45 gets you 3.185" area. Basically .100" wider and .100" taller.

Tom V.

[taff2]

I used a dual quad Offy manifold for my combo,grinding out the runner dividing walls to make one big manifold plenum-similar to a blower manifold. My carb box/hat/plenum is also pretty big(not as big as I would have liked it but it had to fit under the hood) so that the velocity of the air going into the box is slowed down and converted to pressure over the carb inlets. Driveabilty is good ,as is fuel distribution, but footbrake launching is tricky with the big plenum and a tight converter.

[JSPONT]

Originally Posted by taff2

I used a dual quad Offy manifold for my combo,grinding out the runner dividing walls to make one big manifold plenum-similar to a blower manifold. My carb box/hat/plenum is also pretty big(not as big as I would have liked it but it had to fit under the hood) so that the velocity of the air going into the box is slowed down and converted to pressure over the carb inlets. Driveabilty is good ,as is fuel distribution, but footbrake launching is tricky with the big plenum and a tight converter.

Do you have a photo??

[Tom Vaught]

I spoke with Marty Palbykin for about an hour yesterday and he said that the original Pontiac 406 cid Intake with the large volume was boxed and stored away and would be very hard to locate, open the box, take pictures, post pictures, etc.... So it is not going to happen.

Tom V.

[charlie66]

Originally Posted by taff2

I used a dual quad Offy manifold for my combo,grinding out the runner dividing walls to make one big manifold plenum-similar to a blower manifold. My carb box/hat/plenum is also pretty big(not as big as I would have liked it but it had to fit under the hood) so that the velocity of the air going into the box is slowed down and converted to pressure over the carb inlets. Driveabilty is good ,as is fuel distribution, but footbrake launching is tricky with the big plenum and a tight converter.

Is it a 2 plain?

[charlie66]

Thanx for trying Tom.

[charlie66]

I have a question for everyone In regards to whether or not my plenum is too small. When im on the break tying to build boost , what happens is the needle on the gage shakes really bad. It moves back and forth from 1 to 6 psi until it gets to 10 psi where it goes dead steady all the up from there. My question is , is it that the plenum doesn't have enough area for the air , so as the pulsations from each valve closing pushing back to the next valve pushing back is shocking and disturbing the small area of air in the plenum where if it was larger it would have more cushion with less disruption , almost like tossing a rock in a small body of water and having more disturbance then it would in a big body of water.

My friend has a 2JZ motor running the same amount of boost and his needled is steady from 1 psi all the way up. He has a plenum that is 1.5 the size of his ci. Mine is around .75 of my cubes.. So what do you think?

[taff2]

Single plane manifold with a big open runner between the carb plenums. Before and after pics. Carb hat/box halfway through construction.

[Tom Vaught]

Originally Posted by charlie66

I have a question for everyone In regards to whether or not my plenum is too small. When im on the break tying to build boost , what happens is the needle on the gage shakes really bad. It moves back and forth from 1 to 6 psi until it gets to 10 psi where it goes dead steady all the up from there. My question is , is it that the plenum doesn't have enough area for the air , so as the pulsations from each valve closing pushing back to the next valve pushing back is shocking and disturbing the small area of air in the plenum where if it was larger it would have more cushion with less disruption , almost like tossing a rock in a small body of water and having more disturbance then it would in a big body of water.

My friend has a 2JZ motor running the same amount of boost and his needled is steady from 1 psi all the way up. He has a plenum that is 1.5 the size of his ci. Mine is around .75 of my cubes.. So what do you think?

A bigger volume will dampen the pulsations for sure. Was the engine doing the same thing before you went to the bigger turbo?

Tom V.