Miata GReddy Dyno - Page 2 - Miata Turbo Forum - Boost cars, acquire cats.

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Old 08-17-2006, 12:44 PM   #21
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Can I use one of those solder thingies that you can solder with one second and then touch to you finger the next second and not bet burned?
yup....personally don't like those, but it will work as long as your getting nice chrome like solder joints.
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Old 08-17-2006, 01:04 PM   #22
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My understanding is that the bipes can only retard timing, news to me that it can add it back in.
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Old 08-17-2006, 01:12 PM   #23
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Originally Posted by jayc72
My understanding is that the bipes can only retard timing, news to me that it can add it back in.
The original designer of the bipes modified the newer versions to add timing back in at higher rpm. See the following link under the software revisions section there is a graph of version 1.5 12/20/01 that shows how it adds timing back in.

http://frontiernet.net/~bipesauto/BipesACU/
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Old 08-17-2006, 01:31 PM   #24
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There you go, learn something new everyday.
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Old 08-17-2006, 02:03 PM   #25
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Quote:
Originally Posted by brgracer
The original designer of the bipes modified the newer versions to add timing back in at higher rpm. See the following link under the software revisions section there is a graph of version 1.5 12/20/01 that shows how it adds timing back in.

http://frontiernet.net/~bipesauto/BipesACU/
Cool... I'm sure I have the latest revision. Thanks for the response. When you read that website, it's kind of impressive what that relatively cheap little black box does.
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Old 12-21-2006, 07:57 PM
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Old 01-22-2007, 12:36 AM   #26
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not unless you have an IC or timming control or WI, or, dont like your motor. He has an IC so he should be ok. i leave mine at 10 becouse it just feels better but that is just me one day i will see if a get more boosted power with more timming probably so but for now 10 degress is good for me. Not to shabby kid free up that exhaust and you should get some more hp.
hey magna... i have the starion ic with j!mpipes... my timing is at 8degrees @5psi... you said earlier that with an ic/timing control, or wi, i can throw my timing back up? i dont know if i will throw it to 14 til i get my emanage put in, but is 10 ok? pm me!
thanks, marlon
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Old 02-15-2007, 05:49 PM   #27
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i like your torque!
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Old 05-21-2007, 11:54 PM   #28
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i hope to be pushin that much but now i think i might hit 140 if that with a stock greddy kit + trust intercooler + DP +bov. hopefully I CAN GET IT IN THE FREAKIN MAIL in the next 2 weeks!
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Old 05-22-2007, 12:01 AM   #29
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i hope to be pushin that much but now i think i might hit 140 if that with a stock greddy kit + trust intercooler + DP +bov. hopefully I CAN GET IT IN THE FREAKIN MAIL in the next 2 weeks!
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Old 05-22-2007, 02:48 AM   #30
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:gay:
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Old 10-09-2007, 06:47 PM   #31
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This looks like a nice setup. I am getting my hands on the Greddy in about a week, and am looking into intercoolers. What diameter tubing are you using to connect the intercooler to the intake manifold. Do you know what the benifits are to having a 2.5 or 2 in piping? Ive seen anywhere from 2 to 3 in piping being used.
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Old 10-09-2007, 07:24 PM   #32
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no benefit whatsoever from one over the other.
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Old 10-11-2007, 03:58 PM   #33
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no benefit whatsoever from one over the other.
Thank you Braineack. Why is that? I understand that you want the tubing to 1 get rid of heat and 2 deliver air to the manifold (under pressure) efficiently. This means a smooth pipe. If you were to have a larger volume of air inbetween the turbo and the manifold, wouldn't the turbo have to work harder to keep that larger volume of air under pressure? By increasing the volume of the tubing, wouldn't that creat a lag? Do you know what I should be looking for in the tubing, from a design stand pt?
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Old 10-11-2007, 03:59 PM   #34
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Would the system work best with tubing as short and as small in diameter as possible without decreasing after the intercooler?
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Old 10-11-2007, 04:03 PM   #35
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the turbo compresses the air, it should fill a large volume of pipes and make it to the TB in approximately the same amount of time it takes to fill 2" pipes.

if you can measure a difference, I'll give you a cookie.


what i believe to be ideal is 2" into the intercooler (or match your turbo outlet) and 2.5" out of the intercooler to match to TB.
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Old 10-11-2007, 05:11 PM   #36
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Originally Posted by 92Black&Tan View Post
I finished my project yesterday...

GReddy manifold, turbo and downpipe.
RX-7 intercooler with custom piping
Vortech FPR
14 deg base timing
OBX dual SS exhaust
NAPA cat
Wastegate tightened as far as she'll go.

146.5 rwhp and 144.8 rwtq
With the Wastegate tightend all the way, you can only get 7psi?
I could get like 13, or even more maybe, havent tried.
Oh wait, it could be beacue of the hole i drilled on the rod! Doy
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Old 10-11-2007, 07:26 PM   #37
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Good to know. Thanks.
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Old 10-12-2007, 09:03 AM   #38
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Originally Posted by Braineack View Post
the turbo compresses the air, it should fill a large volume of pipes and make it to the TB in approximately the same amount of time it takes to fill 2" pipes.
if you can measure a difference, I'll give you a cookie.
what i believe to be ideal is 2" into the intercooler (or match your turbo outlet) and 2.5" out of the intercooler to match to TB.
I've just taken off all the Greddy pipes and installed 3" ones.
I mounted the AFM directly on the turbo, clocked the turbo downwards and used a 3" stainless elbow which goes into a 3" pipe running in front of the engine up to the TB.
Turbo now kicks in at 3,900 RPM whereas before it was around the 3,500 RPM.
Now....where's my cookie ?

I'm still not hitting 6PSI though for some reason and that was my main reason for changing all the pipes as there was a boost leak in the old ones. Gonna check all the couplers & Tbolts again since it was 11:30pm last night when I brought it out for the first time and couldn't see crap.
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Old 10-13-2007, 01:57 AM   #39
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Fergus- What size were the stock Greddy pipes? Am I correct in understanding that the larger pipes increased the RPM at which you were hitting a given boost pressure? Where you hoping to increase your boost pressure by increasing the pipe size, or where you just trying to correct an old leak with new pipes?
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Old 10-13-2007, 07:46 PM   #40
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he's got other problems. large intake pipes will not change the his spool up rate.
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