tw2

Ducatic230

Needswings manifolds also deals with the pinched portion on the back as well so that may bring the boost drop to 3 or so. Did anyone every get any dyno runs before and after?

PieRat

Nah they post and never check back in, it is the MBworld way...

SICAMG

I had ported that pinched section and never saw a change in boost. It doe's look pretty restricted before it's opened up though.

Ducatic230

They cut off the restrictive part and weld on a true round pipe... gonna take a while i want to test this.

E42AMG???

Turned out serious, I have another project that I’ll leave you with a cliff hanger. I did get the pipe though

Ducatic230

C55 or CLK55 with a vortec?

E42AMG???

C55 it’s an older procharger from a long gone build. Equivalent to a f-1x

Ducatic230

What's the goal?

tw2

Looks fun. I agonized for ages on how to fit a vortech centrifugal into my old CLK55 before deciding the E55 would be a better option. Good luck, I wished I had had the time to go through with it.

E42AMG???

The limit lol, hoping to break the 1000whp barrier.

Im on track to have it done by this spring. This is the RnD car I don’t think the 6 rib SERP belt will bring those numbers.

E42AMG???

Thanks, it really wouldn’t have been cost effective a few years ago. With the support now worst case you go full standalone and the bracket is really the only other big ticket item.

Ducatic230

You have a build thread?

90lxracer

Same as an F1-X?? Which head unit might that be? IF you can squeeze a real F1-X in there there's ZERO reason you can't get to the power you're hoping to make. Just beware of over spinning the unit. Granted the one's I've seen break are gear driven units and not side slingers i'm sure the belt would give up before there's any real damage to the head unit.

E42AMG???

It’s an old d1r oil fed unit not sure what info is out there on it. I’m saying the restriction will be belt slip. I don’t think 6 rib can do 1300hp lol

90lxracer

Those D1's are OLD!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! That head unit I'm guessing is at LEAST 15 years old if not 20 but more like 25.. Those were kind of a "thing" in the 90's lol . But those don't compair in the slightest to the new F1-X's, I think those throw more heat than boost. They weren't long lived if I remember correctly.

Something to think about, it's the RPM that's going to be the limiter.. But factors of rigidity of the bracketry, and yes the 6rib pulley will kill you. But another thing to think about, and this was a plague and the end of the side slingers for racing at least for the mustang crowd was the stress on the crank snout. The slippage issues were corrected through belts going from 6 to 8 to 10 rib set-ups, then ultimately to cog driven, the bracketry was made like an inch think, AND there were were all kinds of other braking on the chassis to stop deflection and keep the belt tension at high boost rates. THEN the cranks started to let go.. all that stress coming from a pulley so far away from the end of the front main on the crank was snapping snouts. At that point gear drives were developed and you realy don't see a whole lot of broken cranks anymore.

1300hp really isn't that much power anymore if you're building a boosted combo at this point, it's the consessions/constraints that are self imposed that get in the way.

Your mileage may vary... but and don't mind me, just giving some observations from the drag racing side of things.