Been running my 383 for about a month now, Changed the oil for the 3rd time last week and should be good to go for regular oil change intervals now. I decided to run Castrol magnatec synthetic blend 10W30 with my wix filter.
With penzoil 10W30 I was seeing very low oil pressure(under 10psi)while idling around 650 rpms.
Even the slightest touch of throttle would shoot it up to 60-70 psi so I wasn't TOO concerned.
Now with the magnatec and a added bottle of Lucas stabilizer I run 20-25 psi at idle and 60-70 with hard throttle. So I think i'm all good there.
While inspecting my carb I noticed my secondaries were dusty and haven't even been opening. My QFT has a single adjustment screw for the secondaries, I loosened the adjustment screw and now they are clean and working but I have no idea when they are actually kicking in?
Does someone know about how many turns out I should have the screw? I think i'm about 5-6 turns out right now...
It's not bogging or anything but I am just wondering if I am leaving power on the table.
I am running a 2" tapered carb spacer with a thick heat insulating gasket... I am thinking about taking the spacer off to see if I notice a change. What would you guys expect to happen? I am already suffering through traction problems so I am thinking the spacer is helping me with that by moving my power band up?
Currently my engine pulls to 6500 rpms. I shift there constantly because that's where it feels good.. I expected my engine to stop pulling around 5500 with my small vortec runners and mild cam...
I am curious if the spacer has anything to do with this and although I have been shifting at 6500 maybe if I remove the spacer my power band would be better suited for my heads and cam.
Currently I am running a 180* thermostat. The engine seems to run better and better the hotter it gets so I was thinking of running a 195... Maybe too much for Texas summers though?
When i first start my engine, my fuel psi is bumping 8-9 psi and after warm up it drops to 4-5, is this okay?
My last question is about valve springs, I know mine are on the weaker limit so what gains would I notice by switching to a stiffer spring?
Here are some specs
1982 chevy C10 silverado standard wheel base, Heavy, not sure how much but a lot.
383ci "880" roller block. 9.4:1 SCR
Morel 4602 roller lifters
Comp ultra pro mag XD 1.5 rockers
Comp hi tech 5/16 .080 pushrods
Mahle inverted dome 26cc
Scat H beam 6.0 rods
Scat 4340 3.750 crank
DUI street/strip HEI distributor with live wires and AC delco rapid fire plugs.
Melling select standard volume, high pressure oil pump
Carter Muscle Car Mechanical Fuel Pump M6626
Lunati voodoo 60121 roller cam (.515 In. .530 EX, 270/278)
906 Vortec heads milled to 59cc, screw in studs, guide plates.
Spring Specs 135 lbs. @ 1.750, 325 lbs @ 1.200
Springs are 1.250 diameter
Performer RPM vortec intake and QTF 750ss vacuum secondaries w/ annular boosters.
24-2600 rpm 9" stall converter with reverse shift pattern manual valve body TH400
Stock rear end, 33X12X15 tires in rear.
With penzoil 10W30 I was seeing very low oil pressure(under 10psi)while idling around 650 rpms.
Even the slightest touch of throttle would shoot it up to 60-70 psi so I wasn't TOO concerned.
Now with the magnatec and a added bottle of Lucas stabilizer I run 20-25 psi at idle and 60-70 with hard throttle. So I think i'm all good there.
While inspecting my carb I noticed my secondaries were dusty and haven't even been opening. My QFT has a single adjustment screw for the secondaries, I loosened the adjustment screw and now they are clean and working but I have no idea when they are actually kicking in?
Does someone know about how many turns out I should have the screw? I think i'm about 5-6 turns out right now...
It's not bogging or anything but I am just wondering if I am leaving power on the table.
I am running a 2" tapered carb spacer with a thick heat insulating gasket... I am thinking about taking the spacer off to see if I notice a change. What would you guys expect to happen? I am already suffering through traction problems so I am thinking the spacer is helping me with that by moving my power band up?
Currently my engine pulls to 6500 rpms. I shift there constantly because that's where it feels good.. I expected my engine to stop pulling around 5500 with my small vortec runners and mild cam...
I am curious if the spacer has anything to do with this and although I have been shifting at 6500 maybe if I remove the spacer my power band would be better suited for my heads and cam.
Currently I am running a 180* thermostat. The engine seems to run better and better the hotter it gets so I was thinking of running a 195... Maybe too much for Texas summers though?
When i first start my engine, my fuel psi is bumping 8-9 psi and after warm up it drops to 4-5, is this okay?
My last question is about valve springs, I know mine are on the weaker limit so what gains would I notice by switching to a stiffer spring?
Here are some specs
1982 chevy C10 silverado standard wheel base, Heavy, not sure how much but a lot.
383ci "880" roller block. 9.4:1 SCR
Morel 4602 roller lifters
Comp ultra pro mag XD 1.5 rockers
Comp hi tech 5/16 .080 pushrods
Mahle inverted dome 26cc
Scat H beam 6.0 rods
Scat 4340 3.750 crank
DUI street/strip HEI distributor with live wires and AC delco rapid fire plugs.
Melling select standard volume, high pressure oil pump
Carter Muscle Car Mechanical Fuel Pump M6626
Lunati voodoo 60121 roller cam (.515 In. .530 EX, 270/278)
906 Vortec heads milled to 59cc, screw in studs, guide plates.
Spring Specs 135 lbs. @ 1.750, 325 lbs @ 1.200
Springs are 1.250 diameter
Performer RPM vortec intake and QTF 750ss vacuum secondaries w/ annular boosters.
24-2600 rpm 9" stall converter with reverse shift pattern manual valve body TH400
Stock rear end, 33X12X15 tires in rear.