Drag Racing Discussions > Front Engine Dragsters
Making a intake manifold for my 4-71 blower
Garyr:
I would recommend "9"s by NGK they are very easy to read on the threads. Keep the boost levels down on the flatty as you only have 3 mains . We ren a bonneville car with a dry sump system and you can't put too much oil pressure on it because it'll leak by the pan seals.
Good luck the manifold looks better than the ones I make out of 4bbl manifolds.
wideopen231:
The sheet metal on my new car is one I made. Did little different. I started with 1/2" thick pice aluminum and machined it to match ports.
I bolted a set of heads down to block,molted the new flanges to heads and then added the runner I had formed around a wooden block I shaped for match what i wanted runners to be.This way i had 8 runners the same size and shape.
I then trimmed tops of runners and made a valley plate for each side. Iwent a welded as much of the bottom of runners and flanges as I could. I then removed and fished welding the rest.
Re bolted to head and added valley plates and then finished of the fron and rear of valley.
Next I added a top plate to allow me to bolt my injector to. Ive got some cleanup of welds and little surface prpep and it will be ready to rock n roll
Sidewinder:
--- Quote from: Garyr on April 06, 2013, 07:48:18 AM ---I would recommend "9"s by NGK they are very easy to read on the threads. Keep the boost levels down on the flatty as you only have 3 mains . We ren a bonneville car with a dry sump system and you can't put too much oil pressure on it because it'll leak by the pan seals.
Good luck the manifold looks better than the ones I make out of 4bbl manifolds.
--- End quote ---
Thank's for Your advice Garyr:) So far no leaks, With 80-90 psi of oil pressure (wet system).
Our current set-up gives us 24 psi of boost. I know this is alot for the 3 mains, but we have chosen good Products in the bottem end.
We have a Moldex billet crank With large journals on the connecting rods. Thoose are Crower I-profile ones. Custom Ross pistons that are coated. Total seal, gapless rings.
To match this we choose a one off Crower cam With roller lifters. Oh forgot to tell you about the cutom billet mains an girdle.
I did some grinding on the inntake today, and hope to do some more Welding soon, as spring is around the corner:)
48 New ARP bolts is on it's way too, so we can mount the new Baron Heads:)
Kjell
GlennLever:
--- Quote from: Sidewinder on April 06, 2013, 05:11:29 PM ---
--- Quote from: Garyr on April 06, 2013, 07:48:18 AM ---I would recommend "9"s by NGK they are very easy to read on the threads. Keep the boost levels down on the flatty as you only have 3 mains . We ren a bonneville car with a dry sump system and you can't put too much oil pressure on it because it'll leak by the pan seals.
Good luck the manifold looks better than the ones I make out of 4bbl manifolds.
--- End quote ---
Thank's for Your advice Garyr:) So far no leaks, With 80-90 psi of oil pressure (wet system).
Our current set-up gives us 24 psi of boost. I know this is alot for the 3 mains, but we have chosen good Products in the bottem end.
We have a Moldex billet crank With large journals on the connecting rods. Thoose are Crower I-profile ones. Custom Ross pistons that are coated. Total seal, gapless rings.
To match this we choose a one off Crower cam With roller lifters. Oh forgot to tell you about the cutom billet mains an girdle.
I did some grinding on the inntake today, and hope to do some more Welding soon, as spring is around the corner:)
48 New ARP bolts is on it's way too, so we can mount the new Baron Heads:)
Kjell
--- End quote ---
There is a flat head hinding in there somewhere!
Sidewinder:
YES ;D!
K
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