any one ever drysump an lt1
10-10-2011, 06:56 PM
#2
Team Owner
Member Since: Mar 2001
Location: Boston, Dallas, Detroit, SoCal, back to Boston MA
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Yes!
http://forums.corvetteforum.com/c4-t...post1566357004
http://forums.corvetteforum.com/c4-t...post1566357004
Finally!
As some of you know I've been working on gradually building up a new engine over the past year or so. It's finally done and just got the computer tuned yesterday. Here are the details:
Engine specs:
Shortblock
LT1 / 4 small block
bore: 4.03"
Stroke 3.625"
6.0" rods
Static compression 10.96:1
Hydraulic roller cam, specs at .05" lift:
Intake duration 230, .622 valve lift
Exhaust duration 236, .624 valve lift
Lobe separation: 112.0
Installed 108.0 intake center line
Caddy racing lifters
Oil system:
Johnson's 4 stage dry sump pump (3 sunction stages all in the pan)
Hamburgers 3 stage dry sump pan with extra scavenge fitting/tube added
custom oil tank
Canton oil thermostat and earls cooler
Intake:
Ported LT4
42lb injectors
58mm throttlebody
Heads:
AFR 210cc LT4 competition ported
Other:
Trans: ZF6
Clutch: Carolina stage 3
Exotic Muscle headers
Corsa exhaust with Carsound 3" Cats
Delteq ignition
Meziere Electric water pump
180* Thermostat
The motor was built for a combination of street and road racing (HPDEs). Shortblock built and cam selection by Midwest engine tech in Mokena, IL. top-end, dry sump, etc was done by me.
My HP goals were ~500HP at the crank (~425 RWHP). Overall I'm very pleased with the result, particularly given the 'unknowns' of the AFR Eliminator heads and the practicality of fitting a dry sump system into a street C4 while retaining all accessories (AC, cruise, traction control, etc). That being said, getting it all in there was a massive pain in the butt. Among many other things I had to fab up new solid motor mounts which move the motor 1/4" back to clear the drive mandrel and also clear the oil fittings on the passenger side. No frame or structural mods were made, though.
Here are the results:
RWHP Dyno graph:
Engine during assembly showing location of dry sump pump and drive mandrel (you can also see the tank pre-installation in the lower left:
Oil tank installed in factory battery location (battery is in the rear storage compartment):
Engine from driver's side:
Engine from passenger side:
Dry sump tank breather can and oil pump (it's down there somewhere):
Link to earlier thread with AFR head pics and flow numbers: http://forums.corvetteforum.com/show....php?t=1775117
Link to earlier thread with Engine dyno numbers: http://forums.corvetteforum.com/show....php?t=1990466
As some of you know I've been working on gradually building up a new engine over the past year or so. It's finally done and just got the computer tuned yesterday. Here are the details:
Engine specs:
Shortblock
LT1 / 4 small block
bore: 4.03"
Stroke 3.625"
6.0" rods
Static compression 10.96:1
Hydraulic roller cam, specs at .05" lift:
Intake duration 230, .622 valve lift
Exhaust duration 236, .624 valve lift
Lobe separation: 112.0
Installed 108.0 intake center line
Caddy racing lifters
Oil system:
Johnson's 4 stage dry sump pump (3 sunction stages all in the pan)
Hamburgers 3 stage dry sump pan with extra scavenge fitting/tube added
custom oil tank
Canton oil thermostat and earls cooler
Intake:
Ported LT4
42lb injectors
58mm throttlebody
Heads:
AFR 210cc LT4 competition ported
Other:
Trans: ZF6
Clutch: Carolina stage 3
Exotic Muscle headers
Corsa exhaust with Carsound 3" Cats
Delteq ignition
Meziere Electric water pump
180* Thermostat
The motor was built for a combination of street and road racing (HPDEs). Shortblock built and cam selection by Midwest engine tech in Mokena, IL. top-end, dry sump, etc was done by me.
My HP goals were ~500HP at the crank (~425 RWHP). Overall I'm very pleased with the result, particularly given the 'unknowns' of the AFR Eliminator heads and the practicality of fitting a dry sump system into a street C4 while retaining all accessories (AC, cruise, traction control, etc). That being said, getting it all in there was a massive pain in the butt. Among many other things I had to fab up new solid motor mounts which move the motor 1/4" back to clear the drive mandrel and also clear the oil fittings on the passenger side. No frame or structural mods were made, though.
Here are the results:
RWHP Dyno graph:
Engine during assembly showing location of dry sump pump and drive mandrel (you can also see the tank pre-installation in the lower left:
Oil tank installed in factory battery location (battery is in the rear storage compartment):
Engine from driver's side:
Engine from passenger side:
Dry sump tank breather can and oil pump (it's down there somewhere):
Link to earlier thread with AFR head pics and flow numbers: http://forums.corvetteforum.com/show....php?t=1775117
Link to earlier thread with Engine dyno numbers: http://forums.corvetteforum.com/show....php?t=1990466
