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- Joined
- Sep 21, 2007
- Messages
- 1,737
- City
- Wa, Bremerton 98310
- Vehicle Year
- 1987
- Total Lift
- Ranger 5" (1½" Hiryder/3" body), BII 4" Procomp
- Total Drop
- Ranger 5sp, BII A4LD
- Tire Size
- Ranger 32"/4:10LS, BII 33"/3:73LS
- My credo
- Deengineer until it is how Blue Oval should have sold it!!
@kdooxp
Yes, I have a JET Stage II PCM CHiP for my rebuilt 2.9l when used with an automatic transmission. for EEC-IV, there is no onboard tuning or data function like with OBD2 in EEC-IV.
I have both 2.9l and OHV 4.0l with JET and Hypertech PCM CHiPs; they do not do a ton but if the engine was well built, has a good exhaust and ignition, they perform like a cherry on an ice cream sunday...they provide just that little extra bit.
It you want data mapping+, you need to invest in the EEC-V system. I like how the EEC-IV responds to engine improvements. I haven't done anything yet that it doesn't handle well ..)
I believe that you will have a difficult time finding anything but 98+ replacement heads. Like I mentioned, I was lucky and have not the ad to buy valves yet; they do not cost much.
BORED T/B
YES, the body is disassembled, then it's body is bored out to the new dimention and a new throttle plate is built to fit the new bore. My good friend Mr. David Endrigo CEO Flowtechnics of Poulsbo Wa has made them for me using stock Ford t/bs. He only bites them to 64mm as the sidewalk is getting pretty thin...I believe that he is correct and 66mm is too thin. He also tapers the inlet and reworks the throttle plate hinge.
HEADERS
I am using 2.9l JBA's on my OHV 4.0l with 98+ spec heads; the exhaust ports are much smaller than the 91-97 heads and actually about the same size as the 2.9l's. I had Mr. Endrigo port them to the 2.9l headers, I believe this is the best move that you could make.
Last I looked, if you are willing to write the check, new old stock JBA and Borla headers are still available for 2.9 and 4.0. Using the 2.9l version with the 98+ heads will give you more exhaust port velocity...you could also make it commission a custom set; I know that Mr. Endrigo would be happy to help with that too.
The "on the cheap" solution for improved design and a little better flow is to use a set of 98+ stock Ford exhaust manifolds. They were redesigned and do offer improved flow, not on par with headers but better than either the 2.9l or 91-97 OHV 4.0l had.
I have not done anything with OHV 4.0l Mustang exhaust components.
VALVE TRAIN
I am using adjustable 2.9l rockers with custom length Smith Brothers rods in my 4.0l to resolve the non adjustable situation. They are not a drop in; 6 of them line up perfect, 6 of them need a small bit taken away to line up. It could be done by anyone however, soliciting the assistance of a reputable machinist is a prudent move.
My primary motivation for chosing this route is to keep these expensive roller lifters worker as long as possible...and I had an extra set of increased lift 2.9l rockers in my spare parts bin.
Yes, I have a JET Stage II PCM CHiP for my rebuilt 2.9l when used with an automatic transmission. for EEC-IV, there is no onboard tuning or data function like with OBD2 in EEC-IV.
I have both 2.9l and OHV 4.0l with JET and Hypertech PCM CHiPs; they do not do a ton but if the engine was well built, has a good exhaust and ignition, they perform like a cherry on an ice cream sunday...they provide just that little extra bit.
It you want data mapping+, you need to invest in the EEC-V system. I like how the EEC-IV responds to engine improvements. I haven't done anything yet that it doesn't handle well ..)
I believe that you will have a difficult time finding anything but 98+ replacement heads. Like I mentioned, I was lucky and have not the ad to buy valves yet; they do not cost much.
BORED T/B
YES, the body is disassembled, then it's body is bored out to the new dimention and a new throttle plate is built to fit the new bore. My good friend Mr. David Endrigo CEO Flowtechnics of Poulsbo Wa has made them for me using stock Ford t/bs. He only bites them to 64mm as the sidewalk is getting pretty thin...I believe that he is correct and 66mm is too thin. He also tapers the inlet and reworks the throttle plate hinge.
HEADERS
I am using 2.9l JBA's on my OHV 4.0l with 98+ spec heads; the exhaust ports are much smaller than the 91-97 heads and actually about the same size as the 2.9l's. I had Mr. Endrigo port them to the 2.9l headers, I believe this is the best move that you could make.
Last I looked, if you are willing to write the check, new old stock JBA and Borla headers are still available for 2.9 and 4.0. Using the 2.9l version with the 98+ heads will give you more exhaust port velocity...you could also make it commission a custom set; I know that Mr. Endrigo would be happy to help with that too.
The "on the cheap" solution for improved design and a little better flow is to use a set of 98+ stock Ford exhaust manifolds. They were redesigned and do offer improved flow, not on par with headers but better than either the 2.9l or 91-97 OHV 4.0l had.
I have not done anything with OHV 4.0l Mustang exhaust components.
VALVE TRAIN
I am using adjustable 2.9l rockers with custom length Smith Brothers rods in my 4.0l to resolve the non adjustable situation. They are not a drop in; 6 of them line up perfect, 6 of them need a small bit taken away to line up. It could be done by anyone however, soliciting the assistance of a reputable machinist is a prudent move.
My primary motivation for chosing this route is to keep these expensive roller lifters worker as long as possible...and I had an extra set of increased lift 2.9l rockers in my spare parts bin.
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