1/4 mile (12.98 @ 106 w/10psi) - Page 2 - Miata Turbo Forum - Boost cars, acquire cats.

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Old 06-18-2008, 01:48 PM   #21
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Quote:
Originally Posted by magnamx-5 View Post
actualy sav he is in croatia or some other destitute country devoid of most rx7's so the torsen is one of his few options besides shinny new stuff.
Awesome time for 10 psi btw
San Antonio, Croatia? Funny, never heared of it haha...
You are thinking of Davor, he is from Croatia, drives an NB too.
Dvcn is from good ol' Tejas!
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Old 06-18-2008, 09:26 PM   #22
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nice run man 10 psi is the engine stock?
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Old 06-18-2008, 09:47 PM   #23
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Originally Posted by blue turbo mx5 View Post
nice run man 10 psi is the engine stock?
197k miles, stock except for the exhintake cam & fidanza cam gears.

Up until a couple weeks ago I ran 12-13psi all the time. I turned it down to 10psi until I collect rebuild parts (rods). It's a pretty big reduction in power.
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Old 06-19-2008, 10:32 AM   #24
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Thanks for the info on the line lock. Did you swap the ends of the existing brake lines to1/8 or use an adapter?
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Old 06-19-2008, 02:49 PM   #25
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Originally Posted by pschmidt View Post
Thanks for the info on the line lock. Did you swap the ends of the existing brake lines to1/8 or use an adapter?
I used a couple of adaptors and the rest was cut and double flare. It's good to have a couple extra stock lines/flare nuts on hand.

Adding the line lock does mess with the front brake operation a little. It makes the pedal a bit stiffer. Even though the 'wisdom' said to just run straight through on the prop valve, I'm really glad I added the adjustable. There were a couple of autox's that I went through the finish at full boost in 3rd gear (on the 5spd) and I was glad I was able to fine tune the braking to avoid smacking the cars in grid.

Adaptors: The 10mm x 1.0mm inverter metric flare is difficult to find. I went through a lot to find them. Now, FM has them in stock after being out for quite a while. Get them now while they have them. But don't be afraid of doing the double flair, it's not that hard. Go to Autozone and borrow their kit for free and follow the instructions on the box.
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Old 06-23-2008, 01:21 PM   #26
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dvcn; first of all congrats on your 1/4 mile times!

Would you mind sharing some info on your Wolf 3DV4 ecu?

- Why did you decide on that particular EMS?
- What has been your experience so far?
- Have you used any other EMS that you may compare it to?

Thanks
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Old 06-23-2008, 08:02 PM   #27
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Originally Posted by Rafa View Post
dvcn; first of all congrats on your 1/4 mile times!

Would you mind sharing some info on your Wolf 3DV4 ecu?

- Why did you decide on that particular EMS?
- What has been your experience so far?
- Have you used any other EMS that you may compare it to?

Thanks
I went with the Wolf because..... my wife won it in a raffle at Sevenstock. It works ok, it's programmed in 'Aussie' (my Aussie friends, I have great respect for you!), there are a lot of nonintuitive settings and the support base is very small for it. I had a Haltech F9A on a 1st gen RX-7. (I have to post up some really good line lock videos of that)

I don't know a lot about the MegaSquirt, but I don't think there is any better choice. The support here is great, you don't have to reinvent the wheel and figure everything out for yourself. I believe the MS has features that blow the Wolf away. An autotune function is worth every penny.

My car does not run as smoothly as an oem, but that's because I'm lazy. It makes some power even though it's way too rich on boost and gets really good gas mileage, so it's good enough that I don't want to spend the effort to make it perfect. Autotune would make it easy.
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Old 06-24-2008, 09:47 AM   #28
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Quote:
Originally Posted by dvcn View Post
I went with the Wolf because..... my wife won it in a raffle at Sevenstock. It works ok, it's programmed in 'Aussie' (my Aussie friends, I have great respect for you!), there are a lot of nonintuitive settings and the support base is very small for it. I had a Haltech F9A on a 1st gen RX-7. (I have to post up some really good line lock videos of that)

I don't know a lot about the MegaSquirt, but I don't think there is any better choice. The support here is great, you don't have to reinvent the wheel and figure everything out for yourself. I believe the MS has features that blow the Wolf away. An autotune function is worth every penny.

My car does not run as smoothly as an oem, but that's because I'm lazy. It makes some power even though it's way too rich on boost and gets really good gas mileage, so it's good enough that I don't want to spend the effort to make it perfect. Autotune would make it easy.
Thanks for replying. I run an AEM now and I have decided not to change it. I was just curious.

Regarding your car not running as smoothly as an oem; maybe it also has to do with the aggressive cams?

BTW, I'm surprised about your mpgs; that was one of the reasons I asked about your EMS.
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Old 06-24-2008, 10:58 AM   #29
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Originally Posted by Rafa View Post
Thanks for replying. I run an AEM now and I have decided not to change it. I was just curious.

Regarding your car not running as smoothly as an oem; maybe it also has to do with the aggressive cams?

BTW, I'm surprised about your mpgs; that was one of the reasons I asked about your EMS.
If your ecu does what you need it to do, I'd leave it.

I have lean spots that makes the car buck a bit, but it probably adds to the gas mileage. I need to fix my temp corrections.

The exhintake cam may do something but I don't think it's worth the time, trouble and cost if you are turbo. Turn up the boost 1/4-1/2psi and you've probably covered the benefit of the cam. Besides, the cam timing that the low budget guys (drill new indexing hole in stock gear) gives the wrong setting for a FI setup, IMHO. That setup is for NA and gives more overlap. We want less overlap and to open the exhaust a bit early.

I'm running a straight exhaust, that allows me to run leaner than 14.7 on cruise without hurting certain exhaust components.

The last tank I only got 23.9mpg. I had turned the boost back up to 12-13psi, had to do 'testing' of the water injection and did a double driver autox. To and from the autox total car weight is probably 2900-3000lbs(co-driver, 4 wheels/tires, tire rack, jack, 30lbs of tools, 9 gallons of water, EZ up, misting system for EZ up, chairs, helmets, shoes, lunch, etc) . Can't complain!
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Old 06-24-2008, 09:29 PM   #30
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dvcn, since you've been so patient with me I'm going to ask you one final question regarding your turbo. FWIW, I already read your previous thread on the matter.

I'm more and more inclined to follow in your footsteps about the ebay chinacharger. I have a great Garrett T3 super .60 but I can't get it to spool earlier than 4,200 RPMs even with my straight thru 2.5" exhaust (we don't have any local emissions regulations). I read you make boost at around 3,200 RPMs with the one you posted. I've found some turbos on ebay but I'm thinking about going with one with a smaller compressor size and the same turbine size as the one you picked. Any comments?

Sorry to bother.

Regards,

Rafa
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Old 06-24-2008, 10:56 PM   #31
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Originally Posted by Rafa View Post
dvcn, since you've been so patient with me I'm going to ask you one final question regarding your turbo. FWIW, I already read your previous thread on the matter.

I'm more and more inclined to follow in your footsteps about the ebay chinacharger. I have a great Garrett T3 super .60 but I can't get it to spool earlier than 4,200 RPMs even with my straight thru 2.5" exhaust (we don't have any local emissions regulations). I read you make boost at around 3,200 RPMs with the one you posted. I've found some turbos on ebay but I'm thinking about going with one with a smaller compressor size and the same turbine size as the one you picked. Any comments?

Sorry to bother.

Regards,

Rafa

I know pretty little about turbo selection. I went with something that someone else, markp, used with success in the power range that I wanted. You'll probably get better info on your T3 from others.

I feel that the full 3" exhaust really helps spool. On other factory turbo cars I've had, every little exhaust improvement made a noticeable difference on spool and power. I suppose that it's possible that my cam timing makes a difference on spool but I haven't done real tests.

I don't think early spool is the end all. I wouldn't want a turbo that had full boost at very low rpm and would be worthless on the top end. The oem turbos I've had really had no upper end power. The current setup hits pretty hard and there isn't a noticable dropoff in power, all the way to the 7400rpm fuel cut.

I don't really condone the use of the chinacharger. I think I'm lucky, so far. If you can afford a better turbo, get it. The oil seals are fine but the bearings are definitely looser than a year ago. I'm going to run it until it quits, whenever that may be. I'm just one data point.
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Old 06-24-2008, 11:12 PM   #32
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Originally Posted by dvcn View Post

I don't really condone the use of the chinacharger. I think I'm lucky, so far. If you can afford a better turbo, get it. The oil seals are fine but the bearings are definitely looser than a year ago. I'm going to run it until it quits, whenever that may be. I'm just one data point.
dvcn, once again thanks for your reply. I want to make just a comment and then I'll let you go; what you mention above is the key to me. Let me explain myself:

I think I have the perfect turbo right now for a built 1.8L engine. The problem is that my engine is fine (64,000 miles on it) and only facing overheating issues that I'm tackling but the internals are still as good as new; therefore, I figure I have 1 more year with a stock engine and this is the time to try different spools because I'm certain that in the end I'm going to build the engine. That's why it makes sense to me to buy 2 cheap turbos with different specs and give them a try
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Old 06-25-2008, 10:33 AM   #33
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I've undersold the chinacharger. I am thrilled with its performance and can't wait until I rebuild this 197k (oil burning, rings probably ready to go) motor with good rods so I can feel good about turning up the boost.

I just don't want to be reponsible if anyone happens to get one of the bad ones.

There are places that rebuild them, but like you said, a new one on eBay would cost half as much.
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Old 06-25-2008, 02:17 PM   #34
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Friend of mine runs the same turbo as yours dvcn for well over a year now, and he has had great success and beats on his car extremely hard (many track sessions, drift events, autocrosses, etc). In all honesty, if I were to do my build over again, I would go with a Chinacharger
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Old 07-24-2008, 09:34 PM   #35
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Default wolf ems file

Any chance of getting a copy of your current file in the wolf? I am looking to that ecu in a 1.6 miata boosted with a Greddy turbo, and would appreciate a starting point from which to tune.
[email protected]
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Old 07-25-2008, 09:45 AM   #36
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Do you currently have the Wolf 3dV4? Even if you got it for free, sell it. Got it for $500? Sell it, even at a loss. The MS is a much better choice, not only for what it can do, mostly for the support you can get here.

You will get near zero support on the Wolf, especially from Wolf. I don't know anyone else in the U.S. running it on a miata. I know two people in Australia.

My 1.6 maps are for NA. My current boosted 1.8 maps are very rough but I'll send you the latest of both. Might take me a day, I have to pull the map.
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Old 07-28-2008, 10:01 AM   #37
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Originally Posted by dvcn View Post
I've undersold the chinacharger. I am thrilled with its performance and can't wait until I rebuild this 197k (oil burning, rings probably ready to go) motor with good rods so I can feel good about turning up the boost.

I just don't want to be reponsible if anyone happens to get one of the bad ones.

There are places that rebuild them, but like you said, a new one on eBay would cost half as much.
Nice Job Man....

Mark

PS - Hopefully my miata will run today.
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Old 07-28-2008, 10:57 AM   #38
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Originally Posted by Markp View Post
Nice Job Man....

Mark

PS - Hopefully my miata will run today.
You still owe me a ride in your car!
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