oscar
New Member
The plan for the track car is to eventually to go forced induction, be it supercharger or turbo I can't make up my mind and without the funds to go full steam ahead on the project there's no rush to make a choice so in the meantime I've wanted to setup some kind of scoop or ram tubes and cold air induction to reduce any vacuum leading to the carb or maybe even to produce a little positive pressure to the carb when travelling at speed. I haven't come up with a scoop solution yet but did finish off a CAI of sorts.
I bought a quality low profile carb hat/plenum, Spectre part number 98499, cast aluminium with polished finish, my first bling part in the engine bay 8) . The Solex carb was removed and the Holley 390 put back on. The Holley has a 5 1/8th" (13.02mm) neck whereas the Solex is larger at about 5 1/3" (13.5mm), so the plenum wont fit a Solex.
Stuck for parts to make up the piping between the pod filter and plenum I found the perfect solution by using 90mm stormwater PVC pipe and a 90[sup]o[/sup] elbow. With different angled elbows available there's plenty of scope to direct the intake anywhere but I kept it simple for the moment and just used one. Whilst there's no positive pressure for this setup yet, the cold air comes in via a rectangular hole I cut in the panel below the left headlight. I was going to delete that panel entirely but thought better not, for the moment.
Part of the CAI also needed to take into account the need to take fumes from the engine's breather. Needing an oel catch can I thought rather than buy a stainless steel one I'd use an early metal type SLS suspension reservoir. POVO had standard suspension ex factory so I grabbed the metal can off the red wreck and the bracket off the brown wreck. From what I understand metal v's plastic suspension reservoirs is a early v's late thing,ie pre and post '76. Just about all cars have the reservoir located behind the left headlight except d-jet and some carbed 280's that have theirs close to the LHS firewall. Not sure about some LHD 280's which would have the brake booster in the way. In any case, if the reservoir is near the firewall, the bracket is welded to the inner fender and can't be reused. Any front top cross member mounted reservoir will have a removeable bracket.
The rerservoir was emptied and cleaned then filled with steel wool then attachments added to the lid for the breather hoses. Copper pipe was soldered into the inlet attachment to try and make the fumes come into as much of the steel wool as possible. Also a decent cap and threaded plug for the drain was soldered in place. I wanted to solder the hose fittings to the reservoirs lid but couldn't and although they were attached tight, making the can air tight involved using RTV silicone around the fittings/lid joints.
The CAI and catch can had it's first test and proved to be a good combo. I can't really say if there was a power increase but apart from satisfying scrutineers, there were no leaks.
I bought a quality low profile carb hat/plenum, Spectre part number 98499, cast aluminium with polished finish, my first bling part in the engine bay 8) . The Solex carb was removed and the Holley 390 put back on. The Holley has a 5 1/8th" (13.02mm) neck whereas the Solex is larger at about 5 1/3" (13.5mm), so the plenum wont fit a Solex.
Stuck for parts to make up the piping between the pod filter and plenum I found the perfect solution by using 90mm stormwater PVC pipe and a 90[sup]o[/sup] elbow. With different angled elbows available there's plenty of scope to direct the intake anywhere but I kept it simple for the moment and just used one. Whilst there's no positive pressure for this setup yet, the cold air comes in via a rectangular hole I cut in the panel below the left headlight. I was going to delete that panel entirely but thought better not, for the moment.
Part of the CAI also needed to take into account the need to take fumes from the engine's breather. Needing an oel catch can I thought rather than buy a stainless steel one I'd use an early metal type SLS suspension reservoir. POVO had standard suspension ex factory so I grabbed the metal can off the red wreck and the bracket off the brown wreck. From what I understand metal v's plastic suspension reservoirs is a early v's late thing,ie pre and post '76. Just about all cars have the reservoir located behind the left headlight except d-jet and some carbed 280's that have theirs close to the LHS firewall. Not sure about some LHD 280's which would have the brake booster in the way. In any case, if the reservoir is near the firewall, the bracket is welded to the inner fender and can't be reused. Any front top cross member mounted reservoir will have a removeable bracket.
The rerservoir was emptied and cleaned then filled with steel wool then attachments added to the lid for the breather hoses. Copper pipe was soldered into the inlet attachment to try and make the fumes come into as much of the steel wool as possible. Also a decent cap and threaded plug for the drain was soldered in place. I wanted to solder the hose fittings to the reservoirs lid but couldn't and although they were attached tight, making the can air tight involved using RTV silicone around the fittings/lid joints.
The CAI and catch can had it's first test and proved to be a good combo. I can't really say if there was a power increase but apart from satisfying scrutineers, there were no leaks.
