BEGI S4, GT2860RS, 3" Exhaust - Page 2 - Miata Turbo Forum - Boost cars, acquire cats.

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Old 03-27-2008, 10:24 AM   #21
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I second the drive to delaware.. Its a short hop.
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Old 03-27-2008, 10:24 AM   #22
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Quote:
Originally Posted by chriscar View Post
I'll be happy to see that. I'm going to get an S3, GT2860RS, 3" from dp to bumper, MSPNP, RX7 550's.

C
x2
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Old 03-27-2008, 10:32 AM   #23
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They could write off all expenses cause it's advertizing. or something like that. i dunno.
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Old 03-27-2008, 10:33 AM   #24
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while you guys wait for your drf files....ill do it the easy 5 second way:
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BEGI S4, GT2860RS, 3" Exhaust-overlay.jpg  
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Old 03-27-2008, 11:59 AM   #25
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oh.....
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Old 03-27-2008, 01:03 PM   #26
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what rpm produced 8psi/when does the car start moving?
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Old 03-27-2008, 02:14 PM   #27
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Quote:
Originally Posted by Newbsauce View Post
I second the drive to delaware.. Its a short hop.
I wish we could. I go to CT alot, so if I was in the area it would be no problem. But I have a gymnastics meet next weekend.

The dyno is at 700 ft elevation. The office is at 1400 ft.
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Old 03-30-2008, 09:19 AM   #28
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wow, those curves are very close after 4200rpms.
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Old 03-31-2008, 02:06 PM   #29
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For them to be that close, I'd take paul's - I love having a lot of power down low - it doesn't really make it much faster, but it's a lot nicer to drive around town like you have a V-8, cruising 3 gears higher than you should be...
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Old 03-31-2008, 03:39 PM   #30
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It's a lot nicer for tight autocross courses as well. I think this thread helped me make up my mind to get the 2560r over the 2860rs.
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Old 03-31-2008, 03:51 PM   #31
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the compressor wheels are the same, so you should expect similar power. I bet if it were the same motor and spark map, the 2860 would simply make more power up top, but you'd see that sacrifice of low-end, which isn't a big deal. Like seen on Jeremy's car: http://www.flyinmiata.com/tech/dyno_...emy_potato.pdf
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Old 03-31-2008, 03:52 PM   #32
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That's what gets me - something with that much of a turn off on the top end should have a lot of bottom. I wonder what boost as a function of RPM was... Maybe they were in a really low gear on the pull compared to paul.

To me it seems like they should have top-end, but then again, the engine management isn't ideal, is it? Restrictive intake?

Got me. I just need to tune my car. Sometimes it runs well. :-P
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Old 03-31-2008, 04:02 PM   #33
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Doesn't Paul have his super-pimp custom made manifold? I'd like to see him toss a Potato on that car and see what it does compared to the 2560.

C
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Old 03-31-2008, 04:07 PM   #34
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no, that's a pretty typical comparison. both will make similar power, the 2860 will spool slower but make more power per psi.

the turbine is .8mm larger and a 76 trim vs. a 62 trim
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Old 03-31-2008, 04:10 PM   #35
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That BEGI dyno was at 13psi, how much was Paul running?

C
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Old 03-31-2008, 04:17 PM   #36
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14psi IIRC.
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Old 03-31-2008, 04:22 PM   #37
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Yeah, 1psi difference. Does the gt2860rs suck that much? You really think that putting a 2560 on the Begi car will result in the same curve Paul has, or visa-versa?

C
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Old 03-31-2008, 04:27 PM   #38
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it's just a turbo for a different job.

Again look at this comparo. this was the same car and same boost: http://www.flyinmiata.com/tech/dyno_...emy_potato.pdf

while it lost 500rpm of spool, it gained 10hp/10tq. probably runs a little cooler as well, so better for track days where you dont need that extra low-end and can use all teh heat management you can get.
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Old 03-31-2008, 04:33 PM   #39
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paul also has a 99 head with some work done to it I believe, right?
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Old 03-31-2008, 11:35 PM   #40
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the car in question is an 03 so it has the same flowing head and no, my 99 head is stock.

lets see what i can do this saturday. busting my *** getting this set up



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