Everybody likes an inside scoop so I thought I'll post up a bit of goss from time to time when it's OK.
The latest from Torquepower is a couple of new single plane hi rise manifolds for the injected Holden V8.
Basically they are for big HP high RPM engines only, with an average port cross section of 3.2 sq in and 3.5 sq in on the Dominator version.
To put that in perspective the current TP hi rise manifold is 2.7 sq in and the Harrop hi rise single is 2.8 sq in.
They also feature a new plenum design.
Testing will be done on a 383ci engine next month (hopefully) with .740" lift and 264 and 271 dur @ .050". It will also have the big flowing CNC ported Torque power heads on.
Craig is going to call them the "Pro Paw" and the "Dominator Paw" so watch out for them in the next cpl months if you're building a "banger". They will be the same price as current manifold range $860 for carb version and $1020 with injector holes machined.
Sorry.... no pics yet.
Do you know if TP have a manifold in the works with smaller cross sectional area to suit the 304, more like 1.8 inches? that's something really missing in the market. Also do you know the area on the current injected heads single plane? I assume it's smaller than the harrop since everyone seems to say it works better on smaller motors
The current TP manifold has 2.7 sq in ave, a little smaller that the Harrop but not much.
1.8 hey... I don't believe so, the focus of late has been more on big hp products and getting the Holden strokers over the 600 mark more easily.
Here's a user guide that Craig and I have been working on to help choose the right TP manifold. There are other criteria but cubic inch and cam duration are probably the two most important to consider.