Stepping off in to an area I know nothing about. Was reading some old posts about making sure the engine is level on the intake plenum or maybe a 3-4* angle depending on driveline angles. With me going fuel injection and having a CV joint out back, should I just set the engine//transmission level and call it good? I'm hoping to get lucky and reuse my existing 700r4 crossmember with the 4l80e//np208 combo and just move it back and everything line up but if not I want to know what to take in to consideration before I build a new mount. And I'm probably over thinking the whole thing but I'd rather ask than not.
CK5
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Engine angle
- Thread starter centexk5
- Start date
Be careful using the intake plenum, not all are flat / level relative to the engine centerline. Iirc, my old Edelbrock Performer has an angled carb mounting pad.
my K5 engine is never level. ever.
well- maybe occasionally... accidentally... depending on where it is parked. but, aside from that...
- I hit the gas = not level
-I hit the brakes = not level
- I turn the steering wheel = not level
And that's just GETTING it to the trail! Once that carnival ride starts, I'm guessing port/plenum velocity takes care of any unlevel/off camber intake issues? and if I ever feel I need a windage plate to avoid whipping up the oil in my non level oil pan, I guess that could be done. Ive been too busy breaking main bolts and piston rings to really notice my out of level plenum though
well- maybe occasionally... accidentally... depending on where it is parked. but, aside from that...
- I hit the gas = not level
-I hit the brakes = not level
- I turn the steering wheel = not level
And that's just GETTING it to the trail! Once that carnival ride starts, I'm guessing port/plenum velocity takes care of any unlevel/off camber intake issues? and if I ever feel I need a windage plate to avoid whipping up the oil in my non level oil pan, I guess that could be done. Ive been too busy breaking main bolts and piston rings to really notice my out of level plenum though
might be more important with a carb that spills over from its bowl vents? other than that, yes i have heard other people mention that... have heard an old circle track racer try to convince me that fueling with a carb can be more efficient and/or consistent if plenum angle is correct for the application... ( I still don't think I can buy into that)
My driveline is sitting on factory engine mounts and very not factory trans mount/crossmember location. IM pretty sure the back of the engine sits lower than it would have stock... IT does not seem to care, but the rear driveline CV and pinion angles seem to LOVE having everything designed around them!
My driveline is sitting on factory engine mounts and very not factory trans mount/crossmember location. IM pretty sure the back of the engine sits lower than it would have stock... IT does not seem to care, but the rear driveline CV and pinion angles seem to LOVE having everything designed around them!
Having the crank level is going to raise the transmission and transfer quite a bit. This is where you can gain some ground clearance. IIRC the stock blazer angle is 5 or 7 degrees, but this is using something other than the vehicle suspension and ground as the datum plane, I.E. the factory datum plane. I don't know what they used in the factory but for me I used the flat part of the lower frame rail in between the leaf mount and towards the rear where it starts angling downard.
With my truck I adjusted that angle 2 degrees less, which then put my transfer case up in the floorboards.
You need to mock stuff up to see the angle you can work with. Don't use the intake unless you know its on centerline.
With my truck I adjusted that angle 2 degrees less, which then put my transfer case up in the floorboards.
You need to mock stuff up to see the angle you can work with. Don't use the intake unless you know its on centerline.
