Welcome to Ultimate Subaru Message Board, my lurker friend!
|Welcome to Ultimate Subaru Message Board, an unparalleled Subaru community full of the greatest Subaru gurus and modders on the planet! We offer technical information and discussion about all things Subaru, the best and most popular all wheel drive vehicles ever created.
We offer all this information for free to everyone, even lurkers like you! All we ask in return is that you sign up and give back some of what you get out - without our awesome registered users none of this would be possible! Plus, you get way more great stuff as a member! Lurk to lose, participate to WIN*!
* The joy of participation and being generally awesome constitutes winning
** Not an actual guarantee, but seriously, you probably won't regret it!
Serving the Subaru Community since May 18th, 1998!
Adjustable Timing Pulleys… who might want some?
Posted 25 January 2005 - 05:09 PM
On a suggestion from Tex I have prototyped a sprocket for the EA82 (see pics), he will receive the first set for testing (cause he gave me a bunch of parts, thanks again Tex ). I have also made contact with Myxalplyx about possibly including them in his Dyno testing. After I’m happy with the design I will hopefully have enough interest to justify a small production run.
The units are adjustable +/- 10 deg with locking pin locations for +/- 0 through 5 deg at 1 cam degree increments (1/2 crank degree), one whole belt tooth is 10 deg so this yields a full range of adjustment. The steel prototype came in at 12oz (stock is 9oz), the production version will have an aluminum hub and should be at or below stock weight. One detail that still to be determined is if the mounting screws will clear the stock timing covers, they protrude from the pulley face by about 0.120” and I have not checked the clearance yet (preliminary investigation does not look promising, thanks Shadow).
Anyway, let me know what you think and give me an idea what you might be willing to pay for them. Quantity will have some effect on the final price, but unless it high enough to warrant a CNC run it won’t make a tremendous difference.
Posted 25 January 2005 - 05:43 PM
Posted 25 January 2005 - 08:00 PM
Actually, AVCS would be better.
Posted 25 January 2005 - 08:18 PM
Posted 25 January 2005 - 08:20 PM
Question: is there a good reason to go this route rather than adjusting the timing at the disty?
this adjust the CAM timing.....as well as the disty timing for the driver side cam.
Posted 25 January 2005 - 08:25 PM
Posted 25 January 2005 - 10:29 PM
Adjusting the cam timing is used to move the powerband up or down the RPM range, it is completely different from ignition timing which is simply choosing when to fire the spark. These can have a great benefits for offroading when you want your powerband lower, as well as if you are a drag racer, where shifting the powerband can help you tweak your 60 foot and trap times, as well as full out road race/high rpm fellows who want to move the range up.
I got a sneek peek at these and I must give kudos to Gary on them, he does excellent work. Someone offering access to these kinds of parts for an EA82 doesn't come along very often, so if your serious about your EA82 now's the time to start looking into these high performance options. I have a feeling the EA82 platform is going to start to take off this year with a lot of solid EA82's being built up.
Posted 26 January 2005 - 11:30 AM
Those are well crafted; good work man. Hopefully Tex and Shadow can test them fully and find out if the engine will run hotter. After all the bugs are worked out this should be another real performance upgrade for the EA82.
I'm continually ammazed by the diversity of knowledge and craftsmanship we have in the USC. While a lot of clubs just buy bolt ons from some 3rd party manufacturer; we have people who love Subarus so much they craft quality upgrades and share them with the community to further the greatness of Subaru
Posted 26 January 2005 - 12:37 PM
Shadow, thanks for the kind words.
I know price is the bottom line and I know that most of us playing with old Subies don’t have unlimited budgets. Here’s the breakdown… I need a stock set of pulleys for each set, these would normally be a core charge/exchange deal so no real added cost for these (BTY, I could use some of these to get started if anybody has some lying around). The material for the hubs isn’t very expensive, about $20 a set with hardware. My best estimate for total production time is about 8 hours a set, but hopefully less once I get going, I usually get about $25 an hour for home shop work... all that comes to $220 a set. I think that’s going to be a little high for most people, I’m thinking something around $140-$150 would be good, I don’t mind de-valuing my time a little and if a make enough of them at a time it will cut down on the setup time in each part. So for now lets ballpark somewhere between $150 and $200 a set. Does that scare everybody off?
This all assumes that they prove to have an advantage, I’m sure for those with aftermarket cams they will, but I’m not sure how much they might add to the stock set up.
What do you guys think about making up some and taking them to WCSS7? How many do you think I could sell?
Give me your thoughts
Posted 26 January 2005 - 01:20 PM
The advantage is proven in my book. I remember on the old boards the ppl who did this noted significant increase at the 'seat of their pants' dyno This mod has been done on other engins also; it works Its kinda funny you made this thread; not 12 hours after Arch and I were talking about this very same thing in my garage!
Posted 26 January 2005 - 01:25 PM
Posted 26 January 2005 - 02:50 PM
Posted 26 January 2005 - 08:19 PM
I have a plan on the back burner for a screaming xt machine....I am leaning toward a 6 but if this has good potential I might go the ea-82 route (unless these would work on an xt6)
I think an even $200 is a very fair price and $50 core (total of $250 if you don't have core) I believe that time is money so if you are going to do it you might as well make it worth your time......
Posted 26 January 2005 - 08:29 PM
Posted 26 January 2005 - 09:52 PM
If I can move my power band lower then I'd be in, possibly for 2 sets. I can send pulley's down in advance if need be when the time comes.
Price sounds reasonable.
Posted 26 January 2005 - 09:57 PM
In a recent (December) thread, someone local mentioned that they had "piles" of the crank sprockets, so perhaps they have piles of the cam sprockets, too.
... (BTY, I could use some of these to get started if anybody has some lying around)...
Want me to find the reference and ask ther person?
BTW, preeeety. I would still prefer variable sprocketry, but this is definitely a step in the right direction.
Posted 27 January 2005 - 01:52 AM
Posted 27 January 2005 - 12:04 PM
since i am dis'd i guess i would have a little diffrent results then everyone else
Posted 19 March 2005 - 10:05 AM
Posted 19 March 2005 - 12:19 PM
Posted 19 March 2005 - 01:03 PM
I finished the fixture plate for the mill work so all I need now is some material for the hubs and few sets of stock pulleys… and a bit of inspiration which bumping this thread should provide. My plan is to do three or four sets in this first run and get some out to my testers, maybe even try a set on my stock RX for durability testing (I drive 900miles a week). If all is good I hope to have more sets available to sell by WCSS7.
Thanks for the bump
P.S. If I have time I’m going to try to bring a few more wears to WCSS, like light flywheels, wheel spacers/adapters and strut bars. Let me know what you think people might want.[/font][/font]
Posted 19 March 2005 - 04:09 PM
0 user(s) are reading this topic
0 members, 0 guests, 0 anonymous users