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Ruby's New Years ReVolution

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Old 01-24-2010 | 08:37 AM
  #46  
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Originally Posted by TT Oversteer
European Car Magazine did a series of articles on building up a 3.2 similar to what Ed is doing. Check out the links on the RH side for the other articles in the series.

http://www.europeancarweb.com/projec...ork/index.html

They did a beautiful job and spent $$$. RW HP turned out to be around 243 I think. Looks like a fun build but the HP/$$ ratio favors a 3.6 964 or 993 motor conversion.
That's Ralph's 3.5 build - excellent engine.

Here's a response from Steve Wong when I sent him the dynojet numbers from my 3.4 so he could fine tune a chip

Originally Posted by Steve W
Definitely outstanding numbers - although SAE 251 rwhp for a Motronic 3.4 would definitely be eyepopping. Jeremy sent me the Dynojet files for the first iteration of chip tuning, and here are the results, opened with my Dynojet software, SAE corrected. The data show the ambient temp was 81 degrees, 7% humidity, and barometric pressure at 30.27 in-hg. SAE correction is 0.97. SAE Corrected value is 244 rwhp at appx 6300 rpm at an AFR of 13.0-13.1. That's Ralph's 3.5 territory. Must be that 93 octane gas out there. With a little fuel tweaking, we can extract a couple extra hp in the 5000-6000 range.



For comparison, here's Jeremy's 3.4, in blue, compared to Ralph's 3.5, in red, compared to a bone stock 88 3.2 with a euro premuffler and stock chip, in green.

I think Ed will like the 3.4 - and he's a little lighter than my car too.
Old 01-24-2010 | 12:38 PM
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Good luck with the build Ed, looking forward to your results! I went 3.4 on mine with 10.3:1 98mm Mahles, DC20 cams with final CR cc'd at 10.45:1. Makes a great street engine and has no problems hitting the redline - lightweight clutch housing just adds to the flexibility.

Few more details below - featured with my brother last year in 911PW

http://www.jzmachtech.com/images/new...ust_911_PW.pdf

LNEngineering do some slip-fit 100mm Nickies, though don't know anyone who has fitted these.

All the best
SP
Old 01-24-2010 | 02:40 PM
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Originally Posted by TT Oversteer

They did a beautiful job and spent $$$. RW HP turned out to be around 243 I think. Looks like a fun build but the HP/$$ ratio favors a 3.6 964 or 993 motor conversion.
The thing about a conversion is the unknown. I've heard of two recently where the used transplant motors offered up some surprises to the new owners, resulting in expensive rebuilds on top of the already significant rebuild costs.
Old 01-24-2010 | 11:09 PM
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I think a Varioram motor conversion sounds like fun. Fun to buy from someone who has already done one that is.
Old 01-25-2010 | 08:43 AM
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If you're interested, here are some great engine rebuild threads on impactbumpers.com. The first link is a project thread, the engine rebuild starts the end of page 26. You'll want to skim over all of the small talk in-between but it's an excellent thread.

http://www.impactbumpers.com/forum/i...ic=4599&st=520

This second thread is an excellent engine rebuild done on a 3.2. (With lots of pics!)

http://www.impactbumpers.com/forum/i...showtopic=8055

Enjoy!
Old 01-25-2010 | 09:42 AM
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Awesome Ed, get that video cam ready for the first run.
Old 01-25-2010 | 10:15 AM
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I would hesitate before going the 3.6 conversion route. I think you would lose a bit of the drivability. The 3.6 makes great torque but won't quit have the song your motor will. That means something to me. Furthermore, there have been concerns about the 3.6, certainly in early cars, not having a stiff enough chassis for the gobs of torque - Ruby is a targa. Your car is by no means a Frankenstein car and now would be a bad time to start down that road. You have developed the car too far to start hacking. Thats my .02.
Old 01-25-2010 | 03:16 PM
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Ed,
I have a SC (with a freshly rebuilt engine!) that may have a bad exhaust valve from an exhaust leak. Compression test tomorrow.
If I have to tear down down the engine that far, I'd like to take the opportunity to go to larger P&C, and perhaps 964 cams. Is this reasonable for a 3.0? How big can I go without having to do major modifications or megabucks?
Old 01-25-2010 | 03:43 PM
  #54  
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Originally Posted by TT Oversteer
European Car Magazine did a series of articles on building up a 3.2 similar to what Ed is doing. Check out the links on the RH side for the other articles in the series.

http://www.europeancarweb.com/projec...ork/index.html

They did a beautiful job and spent $$$. RW HP turned out to be around 243 I think. Looks like a fun build but the HP/$$ ratio favors a 3.6 964 or 993 motor conversion.
I'd love to read thru these articles, but I can't seem to find a link to part 1 of that series, just parts 2 thru 5...anyone know where a link is to the first article?
Old 01-25-2010 | 07:46 PM
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Originally Posted by rgoodrich
Ed,
I have a SC (with a freshly rebuilt engine!) that may have a bad exhaust valve from an exhaust leak. Compression test tomorrow.
If I have to tear down down the engine that far, I'd like to take the opportunity to go to larger P&C, and perhaps 964 cams. Is this reasonable for a 3.0? How big can I go without having to do major modifications or megabucks?
Any set of pistons and cylinders is probably going to cost you $4000 minimum if you go outside of stock. There are guys that have build 3.2L short stroke motors out of 3.0's, I think it is a somewhat popular build. Keep in mind that the pistons are not those off of a 3.2L Carrera motor-wrist pin size and placement is not the same. You probably need to start a new thread on the subject or call Steve Weiner as he knows more in his little finger that I know in total.

Originally Posted by 911Dave
I'd love to read thru these articles, but I can't seem to find a link to part 1 of that series, just parts 2 thru 5...anyone know where a link is to the first article?
Go to Pelican and search using "Ralph" and "3.5L". He posted up more info on his build on Pelican than he was able to put in the magazine articles.
Old 01-25-2010 | 07:58 PM
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Originally Posted by ClubsportSP
Good luck with the build Ed, looking forward to your results! I went 3.4 on mine with 10.3:1 98mm Mahles, DC20 cams with final CR cc'd at 10.45:1. Makes a great street engine and has no problems hitting the redline - lightweight clutch housing just adds to the flexibility.

Few more details below - featured with my brother last year in 911PW

http://www.jzmachtech.com/images/new...ust_911_PW.pdf

LNEngineering do some slip-fit 100mm Nickies, though don't know anyone who has fitted these.

All the best
SP
Shirish: Good on you-getting a writeup! My engine will be very similar to yours, I hope I can crack the 270's-hopefully the upper 270's- in HP once I get some tuning done. Thanks for posting!
Old 01-25-2010 | 10:21 PM
  #57  
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http://forums.pelicanparts.com/porsc...5-part-ii.html
Old 01-25-2010 | 10:37 PM
  #58  
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A couple of those pics are like "nomnomnomnom"
Old 01-26-2010 | 01:09 PM
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Originally Posted by 911Dave
I'd love to read thru these articles, but I can't seem to find a link to part 1 of that series, just parts 2 thru 5...anyone know where a link is to the first article?
Here?

http://www.europeancarweb.com/projec...ect/index.html
Old 01-26-2010 | 01:28 PM
  #60  
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Originally Posted by Ed Hughes
Shirish: Good on you-getting a writeup! My engine will be very similar to yours, I hope I can crack the 270's-hopefully the upper 270's- in HP once I get some tuning done. Thanks for posting!
Very welcome Ed!

On a different chassis dyno recently i hit 273 at 6025rpm and 245 ftlbs at 5098 running on 5/40 300V Motul.

SP


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