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Thread: Ragnorak's 8000+ RPM 318ti Build Thread

  1. #51
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    I've been definitely thinking over battery options. I've found some as light as 12 lbs and the 51R you referenced is in the 27-28 lb range which is still pretty light compared to stock. I've been researching in Miata and S2000 forums to see what they're using. This car would really only be driven a few days a week since I have the M3 for a daily. I just don't want to have to keep it on trickle or worry about it dying if I don't drive it every 24 hours.

    Quote Originally Posted by das borgen View Post
    OP is a fool...I like that and I support this


    Quote Originally Posted by SkinnyBeans View Post
    Just to be sure, I had to google the definition of epic. The results were:

    Adj. -
    heroic; majestic; impressively great: 'the epic events of the war.'

    of unusually great size or extent: 'a crime wave of epic proportions.'

    I'll say this qualifies.

    Carry on OP, carry on
    Haha this actually made me lol at work this morning, thanks man!
    Last edited by Ragnorak; 02-13-2013 at 02:28 PM. Reason: Automerged Doublepost
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  2. #52
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    Definitely gotta meet up once the swap is done .

    I'm doing the same swap..

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  3. #53
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  4. #54
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    Quote Originally Posted by 3xxtiMZK2 View Post
    Subscribed..
    Definitely gotta meet up once the swap is done .

    I'm doing the same swap..
    That's awesome man! Plus you're close as hell to me. We should meet up sometime and trade swap tips. What airbox is that in your sig?

    Quote Originally Posted by Bluebimma View Post
    The 51r is just short 50cca for the ls1 and fits perfectly in the right rear storage area, with the bin removed, and it's already a vented access area and far away and enclosed enough that in a rear collision, it shouldn't affect the passengers.
    That's basically where I was planning on dropping it too. I was looking at Odyssey batteries as well since they go down to ~15 lbs. I have a bunch of OE battery cables too I can use to wire it to the front terminal box, which is nice for fit and finish.
    Last edited by Ragnorak; 02-13-2013 at 05:00 PM.
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  5. #55
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    So small update, but grabbed an AA track pipe today off of a partout in RI. I don't need the section A, so that's for sale if anyone needs it! Now I have to decide if I want to use this or go with a modified AA race exhaust and go full 3"..,


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  6. #56
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    You need this battery (3lbs including the short wires):



    Seen here on the bottom left:


  7. #57
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    Nice build.

  8. #58
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    Quote Originally Posted by jakermac View Post
    You need this battery (3lbs including the short wires):



    Seen here on the bottom left:

    I'm very interested in your battery setup, could you provide a link to a guide about it? Much appreciated
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  9. #59
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  10. #60
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    Quote Originally Posted by jakermac View Post
    You need this battery (3lbs including the short wires):

    Seen here on the bottom left:
    Nice Jacques, what battery is that? 3 lbs is incredibly light.
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  11. #61
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    Here's where I got the idea. All the details are there. It's an old thread, but I've been using one since 2010. It's been in my daily driver E36 for the last 18 months, and it was in a previous car before that. I sometimes park the car (in the garage) for up to 6-7 days at a time. It never fails to start the car. It has on occasion turned over a little slower than usual, but that's been because of pretty cold conditions (below 20 degrees F).

    Pay close attention to all the warnings and the details in the thread. I followed those to a T, and I've had no issues, even at autocross (start and stop the engine up to 20-25 times in an 8 hour period). The only difference for me is that I did a 16 cell pack (4S4P) whereas the OP did a 20 cell (4S5P).

    http://www.clublexus.com/forums/is-f...d-battery.html

  12. #62
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    Quote Originally Posted by jakermac View Post
    Here's where I got the idea. All the details are there. It's an old thread, but I've been using one since 2010. It's been in my daily driver E36 for the last 18 months, and it was in a previous car before that. I sometimes park the car (in the garage) for up to 6-7 days at a time. It never fails to start the car. It has on occasion turned over a little slower than usual, but that's been because of pretty cold conditions (below 20 degrees F).

    Pay close attention to all the warnings and the details in the thread. I followed those to a T, and I've had no issues, even at autocross (start and stop the engine up to 20-25 times in an 8 hour period). The only difference for me is that I did a 16 cell pack (4S4P) whereas the OP did a 20 cell (4S5P).

    http://www.clublexus.com/forums/is-f...d-battery.html
    This is a somewhat nerve-wracking yet sweet DIY battery setup. I'd just be worried about fires in the back of my head but it's not even a relevant fear with the phosphate oxide batteries. I like your custom enclosure/bracket too, it came out very nice! Did you purchase the same A123 (lol bankrupt) batteries?
    Last edited by Ragnorak; 02-19-2013 at 11:28 AM.
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  13. #63
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    Quote Originally Posted by lambo7 View Post
    Interested to see how a 3.91 or 4.10 works for you with the six speed!

    Here is a calculator you can play around with the get an idea how different transmissions work with different rear gears.

    http://www.bokchoys.com/differential...calculator.htm
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  14. #64
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    I did use A123 cells. I bought them a while back (3+ years ago). I didn't know that A123 had gone out of business. I'm sure there's still enough battery stock on eBay to serve us for many years to come.

    The LiFePo4 cells are totally benign when it comes to overcharging or physical damage, so no fears about fires or explosions. I dropped quite a bit of weight by changing to this battery. There's the 38lbs of the original full size battery, and the 6lbs of heavy duty battery cable running from the trunk to the engine bay (mine's a coupe), as well as the battery hold down brackets, etc... all that replaced by 3lbs of battery.
    Last edited by jakermac; 02-19-2013 at 12:29 PM.

  15. #65
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    Quote Originally Posted by GG Allin View Post
    Here is a calculator you can play around with the get an idea how different transmissions work with different rear gears.

    http://www.bokchoys.com/differential...calculator.htm
    It's funny you mention it because that's the same calculator I've been using for a while now. It's definitely set up nicely and has all the diff ratios for the E36/E46 rears.

    Apparently the ZF 5 speed/3.38 combo (very popular on E36 M3s) has the same final drive speeds as the 6 speed/4.10 combo. Cruises at roughly 3500 rpm on the highway with 275/40/R17 tires. Looks like I'm going with a 4.10 Torsen from a 2.8L automatic Z3.

    Quote Originally Posted by jakermac View Post
    I did use A123 cells. I bought them a while back (3+ years ago). I didn't know that A123 had gone out of business. I'm sure there's still enough battery stock on eBay to serve us for many years to come.

    The LiFePo4 cells are totally benign when it comes to overcharging or physical damage, so no fears about fires or explosions. I dropped quite a bit of weight by changing to this battery. There's the 38lbs of the original full size battery, and the 6lbs of heavy duty battery cable running from the trunk to the engine bay (mine's a coupe), as well as the battery hold down brackets, etc... all that replaced by 3lbs of battery.
    I don't think they're out of business but they did file Chapter 11. Now a Chinese company owns it.

    It's almost comical that the battery you built weighs less than the OEM battery cable. This might be something where it'd be fun to CAD a bracket and case for the batteries in Solidworks. Did you just buy them off eBay? I see a bunch listen, not too terrible in price for what they are.
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  16. #66
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    I've only skimmed through, but what are you doing for engine management?

  17. #67
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    Quote Originally Posted by Talperian View Post
    I've only skimmed through, but what are you doing for engine management?
    I've been talking to a few people but am still overall undecided. Once the engine and trans are mounted in the car I'll pull the trigger on a tune.
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  18. #68
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    Yup! I ordered 2 seperate batches off eBay (I made a pack for my buddy's 240sx) and they all came from China.

  19. #69
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    Miata battery

    I am using a Miata battery in my ti with S52. The car used to sit 10 days or even 2 weeks between start-ups and would fire right up.
    I drive it now once or twice a week. No issues. And it fits perfectly in the little cubby.
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  20. #70
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    Quote Originally Posted by jakermac View Post
    Yup! I ordered 2 seperate batches off eBay (I made a pack for my buddy's 240sx) and they all came from China.
    Oh China.

    Quote Originally Posted by pchamaa View Post
    I am using a Miata battery in my ti with S52. The car used to sit 10 days or even 2 weeks between start-ups and would fire right up.
    I drive it now once or twice a week. No issues. And it fits perfectly in the little cubby.
    I was considering that before but I may make a project out of this as well now. You can get a batch of 100 cells for a decent price online...


    And now I just found out that Bimmerworld's S54 midpipe is on backorder. Great. Hopefully they'll get one in soon.
    Last edited by Ragnorak; 02-20-2013 at 04:38 PM.
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  21. #71
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    Need moar updates!!
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  22. #72
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    I also prefer the miata battery setup in the rear to make room for the SAP
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  23. #73
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    Quote Originally Posted by ViKTORiOUS View Post
    Need moar updates!!
    Swing by sometime!

    Quote Originally Posted by Compactive View Post
    I also prefer the miata battery setup in the rear to make room for the SAP
    Emissions? What's that?


    Hah, you could probably fit that battery under the SAP mount or integrate them somehow. I'm not running one on this car.
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  24. #74
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    Hey Garrett long time no see! My friend was telling me yesterday you were building a S54 ti. I'll have to come by and see it. Good luck with it!

  25. #75
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    Quote Originally Posted by 96bmftw View Post
    Hey Garrett long time no see! My friend was telling me yesterday you were building a S54 ti. I'll have to come by and see it. Good luck with it!
    Thanks man, how' everything been going?


    Another small update. Decided to go OEM BMW on the headers as well. European market, catless headers. OE fitment with the same performance as all the non-stepped headers on the market. Hopefully they'll get here by the end of next week so I can mount them up and get the motor in the car!

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