2Loose
reliable source of info
Been doing some searches to answers to these questions, no can find!
OK, my 55 chevy gasser project is coming along, the motor (a 67 Olds 425 with a Hampton 6/71) is assembled, 8:1cr, mild blower cam, 113 deg lobe sep., alum heads, bottom end bolted up solid with a full girdle, pair of mighty Demon 650's off of another blown motor (a chevy), MSD ignition system with blower timing retard, MSD billet dist. with vacuum advance.....
So, questions:
1. The Don Hampton intake is an old Offy dual 4-bbl intake with the center gutted and the blower mount flange tigged on (beautiful welding job...), and no ports are available for vacuum/boost reference, do I just drill holes anywhere I want to reference the signal? Am looking at the rear of the vertical portion of the intake under the blower plate just in front of the distributor, and am thinking three 1/4" pipe thread holes....
2. The distributor has a vacuum advance, as I want to primerily drive this on the street, I think it would be good to keep the vacuum advance and not lock it out, need some opinion there....
But still need to know, hook the vacuum advance up to the port I will drill under the blower???
3. Have a vacuum/boost tube to run to the MSD boost retard function, I assume that will be the same (or next door) port as the timing advance for the distributor?
4. The Demon carbs are set up for a blower app, and need a vacuum reference (I think, need to verify that, anyone jump in here....) for those carbs, so am thinking one more port under the blower????
5. Have a blower boost/vacuum gage in the dash, so I think another port for that tube in the same location under the blower???
My first blower build, so looking for someone who has been there to tell me what not to do wrong!
Am real near to putting this motor in the car and hooking up the wires, then cranking and observing the rush I will get!!!
Aloha,
"2Loose" Willy
Maui
OK, my 55 chevy gasser project is coming along, the motor (a 67 Olds 425 with a Hampton 6/71) is assembled, 8:1cr, mild blower cam, 113 deg lobe sep., alum heads, bottom end bolted up solid with a full girdle, pair of mighty Demon 650's off of another blown motor (a chevy), MSD ignition system with blower timing retard, MSD billet dist. with vacuum advance.....
So, questions:
1. The Don Hampton intake is an old Offy dual 4-bbl intake with the center gutted and the blower mount flange tigged on (beautiful welding job...), and no ports are available for vacuum/boost reference, do I just drill holes anywhere I want to reference the signal? Am looking at the rear of the vertical portion of the intake under the blower plate just in front of the distributor, and am thinking three 1/4" pipe thread holes....
2. The distributor has a vacuum advance, as I want to primerily drive this on the street, I think it would be good to keep the vacuum advance and not lock it out, need some opinion there....
But still need to know, hook the vacuum advance up to the port I will drill under the blower???
3. Have a vacuum/boost tube to run to the MSD boost retard function, I assume that will be the same (or next door) port as the timing advance for the distributor?
4. The Demon carbs are set up for a blower app, and need a vacuum reference (I think, need to verify that, anyone jump in here....) for those carbs, so am thinking one more port under the blower????
5. Have a blower boost/vacuum gage in the dash, so I think another port for that tube in the same location under the blower???
My first blower build, so looking for someone who has been there to tell me what not to do wrong!
Am real near to putting this motor in the car and hooking up the wires, then cranking and observing the rush I will get!!!
Aloha,
"2Loose" Willy
Maui