RangerSVT
Oct 09 OTOTM
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- Joined
- Mar 15, 2009
- Messages
- 7,883
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- 53
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- 48
- Location
- TRS since 2002 - NW KY
- Vehicle Year
- 19962002
- Make / Model
- Ford
- Engine Size
- GT-40 5.0L EFI W/AC
- Transmission
- Automatic
Poll time
First, a little background... Some of you know I have a V8 powered 02 Sport Trac using a 99 ex for a donor. I'm planning a big boost in power, but am undecided on which set of heads to run. I will be using my 89 mustang block (currently has about 120k miles, but will get freshened up with new bearings and gapless rings), ported and polished GT-40 lower intake, custom adapter mounting a ported and intercooled eaton M122, and either a P & P GT-40 head with the valves opened up to 2.05/1.60 (or as close to that as I can get) or a set of AFR185 heads. The cam is slightly over stock, but I'm thinking of going with the FMS X cam. This is a 4wd truck, will have an upgraded 4R70W, will be used for towing and occasional light wheeling but 90% of its life will see street use. Not taking it past 6k rpm, but it will see anywhere from 10-20 psi boost levels. My ST is already SCT tuned and will get a custom tune once built.
I don't want an all out hotrod or dragrace machine, but I do want a good balanced setup with years of reliability.
Now for the question, do you think I should go with P&P GT-40 head with larger valves or run the AFR185 heads? What are your thoughts on each, and why?
SVT
First, a little background... Some of you know I have a V8 powered 02 Sport Trac using a 99 ex for a donor. I'm planning a big boost in power, but am undecided on which set of heads to run. I will be using my 89 mustang block (currently has about 120k miles, but will get freshened up with new bearings and gapless rings), ported and polished GT-40 lower intake, custom adapter mounting a ported and intercooled eaton M122, and either a P & P GT-40 head with the valves opened up to 2.05/1.60 (or as close to that as I can get) or a set of AFR185 heads. The cam is slightly over stock, but I'm thinking of going with the FMS X cam. This is a 4wd truck, will have an upgraded 4R70W, will be used for towing and occasional light wheeling but 90% of its life will see street use. Not taking it past 6k rpm, but it will see anywhere from 10-20 psi boost levels. My ST is already SCT tuned and will get a custom tune once built.
I don't want an all out hotrod or dragrace machine, but I do want a good balanced setup with years of reliability.
Now for the question, do you think I should go with P&P GT-40 head with larger valves or run the AFR185 heads? What are your thoughts on each, and why?
SVT