Hi,
I've sourced an '87 ford 5.0L engine that I'm tearing down for rebuild into the GT40. It's got roller lifters, though not sure how to tell if they are solid / hydraulic lifters? What are they likely to be?
All okay so far, it appears to have had a fresh rebuild to 30 over, with no lip on the bores and hone marks still very clear. Will know more when it's fully stripped down. There's lots of solid gunk in the coolant passages, so that needs investigating. I'm thinking somebody may have mixed coolants. Looks from the damage to the fan and the bent aux belt bracket the truck was in a front end shunt shortly after the rebuild. Hope all okay internally.
Assuming I don't find anything too bad I plan to have it cleaned / inspected / measured / light hone at a local specialist engine builder.
So I'm currently thinking of build spec. Nothing massive, aiming for about 350bhp at the flywheel, so not too radical. Will stay at 302(/308) unless a new crank is needed, in which case I might go 331 or 347.
I'm thinking:
- Stock crank and rods with new bearings / ARP rod bolts
- Possible stock oil pump, not sure if high perf needed?
- Flat top hyper pistons with clearance for big valves.
- fairly budget aluminium heads - ie blueprint/edelbrook e-street/promaxx (avoiding the very cheap castings)
- Throttle body efi (eg fitech go-efi or similar), this will dictate single plane crank.
I'm happy to push the power band up the rpm range a bit obviously as we don't need low down torque.
Not sure what to do cam wise. I can't seem to find any performance cams that use the 302 firing order AND are suitable for roller lifters? All the Ford letter cams are 351W/302H.O. firing order, and I want to keep the 302 sound as much as possible. Does it make a big difference? Do I need to keep the 302 firing order for the closest GT40 sound? If so can anyone suggest a street roller cam that might work?
Thoughts and feedback welcomed!
I've sourced an '87 ford 5.0L engine that I'm tearing down for rebuild into the GT40. It's got roller lifters, though not sure how to tell if they are solid / hydraulic lifters? What are they likely to be?
All okay so far, it appears to have had a fresh rebuild to 30 over, with no lip on the bores and hone marks still very clear. Will know more when it's fully stripped down. There's lots of solid gunk in the coolant passages, so that needs investigating. I'm thinking somebody may have mixed coolants. Looks from the damage to the fan and the bent aux belt bracket the truck was in a front end shunt shortly after the rebuild. Hope all okay internally.
Assuming I don't find anything too bad I plan to have it cleaned / inspected / measured / light hone at a local specialist engine builder.
So I'm currently thinking of build spec. Nothing massive, aiming for about 350bhp at the flywheel, so not too radical. Will stay at 302(/308) unless a new crank is needed, in which case I might go 331 or 347.
I'm thinking:
- Stock crank and rods with new bearings / ARP rod bolts
- Possible stock oil pump, not sure if high perf needed?
- Flat top hyper pistons with clearance for big valves.
- fairly budget aluminium heads - ie blueprint/edelbrook e-street/promaxx (avoiding the very cheap castings)
- Throttle body efi (eg fitech go-efi or similar), this will dictate single plane crank.
I'm happy to push the power band up the rpm range a bit obviously as we don't need low down torque.
Not sure what to do cam wise. I can't seem to find any performance cams that use the 302 firing order AND are suitable for roller lifters? All the Ford letter cams are 351W/302H.O. firing order, and I want to keep the 302 sound as much as possible. Does it make a big difference? Do I need to keep the 302 firing order for the closest GT40 sound? If so can anyone suggest a street roller cam that might work?
Thoughts and feedback welcomed!