rmchrgr
Well-Known Member
My friend and I are getting close to buttoning up his 438" stroker. This is a relatively mild build up. We have a 727 ready to go but need a converter. The input shaft has been updated to 24 spline to be able to install a '67-up converter which has a wider variety to choose from.
General specs of the motor below:
4.310" bore 383 with a 3.75" stroke crank = 438"
228/232 @ .050 hydraulic flat tappet cam, about .525" lift
440 source rotating assembly 383.438.5050 approx 10.0:1 CR
OOTB 440 source heads, 80CC, Comp Magnum roller rockers
Edelbrock Performer RPM intake
Holley 4160 3310 vacuum secondary carb
TTi headers with full dual exhaust
Electronic distributor, electronic ignition
This is going in a '66 Fury with 3.23 gears. Column shift, stock valve body, Lokar kickdown cable. Obviously a comparatively heavy car to get out of the hole that will see almost all city/highway driving. We made it a point to not overcam it because there is no intent to race it but he does want the car to 'jump' when he mats the gas from a light or from a roll.
Thinking a factory type 11" converter could be OK but the reason I'm asking for suggetions is because I have a feeling he could actually benefit from something with a little more stall, say like 2,500 rpm. I think the motor will make plenty of torque but we don't want to make it a dog if the converter is too loose, even at that low of an rpm. I don't imagine he'll be north of 4,500 rpm very often.
So maybe something like a TCI Breakaway or Hughes Street Master seem like a good fit for this application? We're not married to any one particular choice. I know it's always best to get a custom converter made for your particular application but this is a strict budget build and if we can predict decent enough results with an off-the-shelf choice that's what we're going to do.
Thanks for any input.
- Greg
General specs of the motor below:
4.310" bore 383 with a 3.75" stroke crank = 438"
228/232 @ .050 hydraulic flat tappet cam, about .525" lift
440 source rotating assembly 383.438.5050 approx 10.0:1 CR
OOTB 440 source heads, 80CC, Comp Magnum roller rockers
Edelbrock Performer RPM intake
Holley 4160 3310 vacuum secondary carb
TTi headers with full dual exhaust
Electronic distributor, electronic ignition
This is going in a '66 Fury with 3.23 gears. Column shift, stock valve body, Lokar kickdown cable. Obviously a comparatively heavy car to get out of the hole that will see almost all city/highway driving. We made it a point to not overcam it because there is no intent to race it but he does want the car to 'jump' when he mats the gas from a light or from a roll.
Thinking a factory type 11" converter could be OK but the reason I'm asking for suggetions is because I have a feeling he could actually benefit from something with a little more stall, say like 2,500 rpm. I think the motor will make plenty of torque but we don't want to make it a dog if the converter is too loose, even at that low of an rpm. I don't imagine he'll be north of 4,500 rpm very often.
So maybe something like a TCI Breakaway or Hughes Street Master seem like a good fit for this application? We're not married to any one particular choice. I know it's always best to get a custom converter made for your particular application but this is a strict budget build and if we can predict decent enough results with an off-the-shelf choice that's what we're going to do.
Thanks for any input.
- Greg