What is difference 502EFI / 500HP?
02-07-2005 | 11:37 PM
#11
Ginger or Mary Ann?
Joined: Oct 2000
Posts: 11,030
Likes: 9
From: L
Re: What is difference 502EFI / 500HP?
Originally Posted by khadley
they are the same
no billet rods
no billet rods
02-08-2005 | 07:47 AM
#12
Registered
Joined: Feb 2002
Posts: 1,099
Likes: 0
From: KY
Re: What is difference 502EFI / 500HP?
I thought I saw that also US1, I think it was strip poker. His motors had been apart before as I recall and many things were not "stock merc".
The rods in my 00' 500EFI's are stock GM, per seeing them last weekend.
The rods in my 00' 500EFI's are stock GM, per seeing them last weekend.
03-09-2005 | 05:28 PM
#15
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Joined: Oct 2003
Posts: 197
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Re: What is difference 502EFI / 500HP?
When people say EFI are they speaking about the HP500EFI system? And 502MAG would be the MPI system?or are there other systems?
Is one an open or closed loop system? What makes either system better?
Is one an open or closed loop system? What makes either system better?
03-09-2005 | 07:29 PM
#16
Ginger or Mary Ann?
Joined: Oct 2000
Posts: 11,030
Likes: 9
From: L
Re: What is difference 502EFI / 500HP?
Originally Posted by jdnca1
I thought I saw that also US1, I think it was strip poker. His motors had been apart before as I recall and many things were not "stock merc".
The rods in my 00' 500EFI's are stock GM, per seeing them last weekend.
The rods in my 00' 500EFI's are stock GM, per seeing them last weekend.
Last edited by US1 Fountain; 12-02-2011 at 11:16 AM.
03-10-2005 | 05:02 PM
#18
MarineKinetics
Joined: Oct 2002
Posts: 942
Likes: 5
From: Rochester, NY
Re: What is difference 502EFI / 500HP?
Indy,
Cam specs for 502 MPI:
288*/288* seat
224*/224* @.050"
.483"/.483" valve
115.5* LSA
109* ICL
122* ECL
502EFI:
292*/298* @ .004"
230*/236* @ .050"
.598"/.610" valve
114* LSA
109* ICL
119* ECL
502HP:
284*/292* @ .004"
222*/230* @ .050"
.576"/.598" valve
110* LSA
105* ICL
115* ECL
Bob
Cam specs for 502 MPI:
288*/288* seat
224*/224* @.050"
.483"/.483" valve
115.5* LSA
109* ICL
122* ECL
502EFI:
292*/298* @ .004"
230*/236* @ .050"
.598"/.610" valve
114* LSA
109* ICL
119* ECL
502HP:
284*/292* @ .004"
222*/230* @ .050"
.576"/.598" valve
110* LSA
105* ICL
115* ECL
Bob
03-11-2005 | 07:35 AM
#19
Registered
Joined: Jul 2002
Posts: 293
Likes: 0
From: Connersville ,Indiana
Re: What is difference 502EFI / 500HP?
Differences between the two per Merc.
Precision CNC machined 502 C.I.D. cast iron cylinder block.
Forged 4340 steel, fully machined and shot-peened Mercury Racing connecting rods.
Forged aluminum pistons, designed by Mercury Racing, for maximum strength and durability.
MEFI 3 Electronic Control Module digital ignition system features advanced electronics for more precise fuel and spark control along with better top-end throttle response.
Multiport fuel injection system incorporates a high-flow throttle body and tuned intake manifold developed exclusively by Mercury Racing.
A thermostatically-controlled, high-capacity oil cooler raises engine oil temperatures faster and keeps them more consistent.
The oil thermostat and a Positive Crankcase Ventilation (PCV) valve work together to reduce the buildup of condensation in the oil. The PCV valve also improves engine idle.
A hydraulic roller camshaft, which improves low-end torque, offers higher level of performance and aids fuel economy.
Precision CNC machined 502 C.I.D. cast iron cylinder block.
Forged 4340 steel, fully machined and shot-peened Mercury Racing connecting rods.
Forged aluminum pistons, designed by Mercury Racing, for maximum strength and durability.
MEFI 3 Electronic Control Module digital ignition system features advanced electronics for more precise fuel and spark control along with better top-end throttle response.
Multiport fuel injection system incorporates a high-flow throttle body and tuned intake manifold developed exclusively by Mercury Racing.
A thermostatically-controlled, high-capacity oil cooler raises engine oil temperatures faster and keeps them more consistent.
The oil thermostat and a Positive Crankcase Ventilation (PCV) valve work together to reduce the buildup of condensation in the oil. The PCV valve also improves engine idle.
A hydraulic roller camshaft, which improves low-end torque, offers higher level of performance and aids fuel economy.
