FEED 4.777 final drive installed!
Thread Starter
車の性能の違いが戦力の決定的差ではない ということを
Joined: Jan 2004
Posts: 114
Likes: 0
From: Taiwan
FEED 4.777 final drive installed!
I'm not good at mechanics, so I put up some descriptions and pictures for references
The attachment from left to right are factory final drive, FEED kits, 2 angle view of FEED final drive installed
According to my mechanist's words, The installation of it was quiet tough. The rear end of differential gear
should be removed completely. 3 bearings (The largest one in the center and the other two small ones) should be replaced. The ring in the picture is for thinner FEED gear (there are two ring in factory final drive already). FEED gear is quiet fit, I did not notice any grinding sound in it during drving.
I just take few minutes test drive tonight. The first impression is quiker response at lower end as its advertisement. The rpm during low speed driving (God damn city traffic jam!) is only a little higher than it is before
The attachment from left to right are factory final drive, FEED kits, 2 angle view of FEED final drive installed
According to my mechanist's words, The installation of it was quiet tough. The rear end of differential gear
should be removed completely. 3 bearings (The largest one in the center and the other two small ones) should be replaced. The ring in the picture is for thinner FEED gear (there are two ring in factory final drive already). FEED gear is quiet fit, I did not notice any grinding sound in it during drving.
I just take few minutes test drive tonight. The first impression is quiker response at lower end as its advertisement. The rpm during low speed driving (God damn city traffic jam!) is only a little higher than it is before
Last edited by zaku; May 14, 2007 at 10:09 AM. Reason: typo and misunderstaning
I would prefer watching a 10+sec. video versus a 2 sec video for enjoyment purposes 
Its all about Style...
Joined: May 2006
Posts: 3,337
Likes: 0
From: South of Boston, MA
Awsome.. one day I'll do the same but oi the money for it all haha.. please report back any and all details about the way the car feels will ya 
you should know most of us here in the forum we can't get enough details haha..
you should know most of us here in the forum we can't get enough details haha..
Thread Starter
車の性能の違いが戦力の決定的差ではない ということを
Joined: Jan 2004
Posts: 114
Likes: 0
From: Taiwan
Sorry to put on my observation late because of heavy rain in these weeks here (Taiwan) and a business trip.
My car is a 2004 AT with GT package. current mileage is 32000km
The power mod including Odula ram air intake, Rmagic drop in filter, A-RF TREC, hand built catless midpipe and catback. No addtional oil cooler but Plot ATF cooler. The sus mod includes Ohlins coilovers, Racing beat front/rear swar bar, Autoexe tower braces and member brace. wheels are OZ ultraleggera with Yokohama AD07tires (225/45/18)
I notice the rpm at every speed raised about 500-750rpm. For examples, At 60km/hr, It is 6700rpm/1st gear, 3750rpm/2nd, 2450rpm/3rd and <2000rpm/4th. The top speed lowered at every gear about 10-20km (I did not have a good record becasue most of the time I drove alone and most aggressive driving was around the hills).
The gas mileage decreased, but almost not noticeable (about 0.5km/litter). In urban driving, 4.8-5.1km/litter. For highway driving, it's about 8km/litter
Hope these info help.
My car is a 2004 AT with GT package. current mileage is 32000km
The power mod including Odula ram air intake, Rmagic drop in filter, A-RF TREC, hand built catless midpipe and catback. No addtional oil cooler but Plot ATF cooler. The sus mod includes Ohlins coilovers, Racing beat front/rear swar bar, Autoexe tower braces and member brace. wheels are OZ ultraleggera with Yokohama AD07tires (225/45/18)
I notice the rpm at every speed raised about 500-750rpm. For examples, At 60km/hr, It is 6700rpm/1st gear, 3750rpm/2nd, 2450rpm/3rd and <2000rpm/4th. The top speed lowered at every gear about 10-20km (I did not have a good record becasue most of the time I drove alone and most aggressive driving was around the hills).
The gas mileage decreased, but almost not noticeable (about 0.5km/litter). In urban driving, 4.8-5.1km/litter. For highway driving, it's about 8km/litter
Hope these info help.
Senor Carnegrande
Joined: Jul 2003
Posts: 871
Likes: 0
I notice the rpm at every speed raised about 500-750rpm. For examples, At 37 mph, It is 6700rpm/1st gear, 3750rpm/2nd, 2450rpm/3rd and <2000rpm/4th. The top speed lowered at every gear about 6-12 mph (I did not have a good record becasue most of the time I drove alone and most aggressive driving was around the hills).
The gas mileage decreased, but almost not noticeable (about 1.2 mpg). In urban driving, 11.3~12.0 mpg. For highway driving, it's about 18.8 mpg.
The gas mileage decreased, but almost not noticeable (about 1.2 mpg). In urban driving, 11.3~12.0 mpg. For highway driving, it's about 18.8 mpg.
RX8 and a Truk....
Joined: Nov 2004
Posts: 4,658
Likes: 7
From: OKC
Top end? as in high-end power? or Top Speed. As stated, this Mod would reduce the car's top speed as far as gearing goes. But, as 6sp'd are GEARED to go about 185mph, I doubt most any RX8 would notice their real (Hp-Limited) Top speed reduced.
We are building one of these right now and it's not looking good. The machined spacer is not equal thickness around and the sleeve on the pinion also hasn't been machined true. We may opt to return these parts to their owner and have it done elsewhere rather than ruin our reputation.
Our builder has been doing diffs for 35 years. Needless to say, I'm a little disappointed with Feed.
Paul.
Our builder has been doing diffs for 35 years. Needless to say, I'm a little disappointed with Feed.
Paul.
I'll snap his neck.
Joined: Feb 2006
Posts: 1,233
Likes: 2
From: EVOLV-Chicago
Any of you that have had this done have any thoughts or advice for Paul? I'm guessing he's talking about mine. Crapping my pants as I'm sure I won't be getting my money back from JonDemand based on recent discussions...
I'll snap his neck.
Joined: Feb 2006
Posts: 1,233
Likes: 2
From: EVOLV-Chicago
AWESOME!!!
Paul, you and Mr Engman are the... well, I was going to say THE MAN, but there are two of you.
Although you did give me a bit of a heart attack
But it is very comforting knowing it was done right!
Paul, you and Mr Engman are the... well, I was going to say THE MAN, but there are two of you.
Although you did give me a bit of a heart attack
But it is very comforting knowing it was done right!