1972nail wrote:That's the Blydenstien / Janspeed 'race' style manifold which gives a few extra horses at the top end at the expense of torque whereas the Blydenstien 'road' style manifold gives more torque but looses a couple of bhp in comparison to the 'race' manifold. The race manifold is best suited a full race spec engine where it can really perform. Also the race manifold is a pig to fit and will shake loose at every joint until doomsday.... but it is still more efficient than the cast effort.
Janspeed took the race spec design and made them with smaller pipes which helped make them easier to fit and gave better access to the plugs.
You may have to remove the engine mounting and alternator to get it to fit and you may also need to fit the alternator on the high-level Chevette HS alternator bracket which relocates the alternator on the opposite side of the engine beside the fuel pump.
Here's the 'road' style manifold fitted to my car. The design was adopted for the standard manifold for the HPF but the HPF manifold has smaller pipes.
It's hard to beat the sound of a Slant 4 on a 4 branch.......
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