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Old 07-23-2010, 01:13 PM   #1
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Default Gt2871 dyno

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Build details in sig. Whatcha think? Keep in mind that this is a dyno dynamics dyno. They said that it generally reads 17% lower than a dynojet.



EDIT: 95, MSPNP, 1.9L 99 head, 550's, 949 racing twin disc, 6-spd, gt2871, 9:1 Wiseco's, M-Tuned Rods, ARP Head and Main Studs, ACL Bearings, BE OPG'S, ATI Super Damper, HDHTDCDD, DO WI
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Old 07-23-2010, 01:13 PM   #2
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How much boost?

I like it. Allot. Definitely time for an intake manifold though.
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Old 07-23-2010, 01:16 PM   #3
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seems to spool up a little slow for a 2871, what manifold?
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Old 07-23-2010, 01:20 PM   #4
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17psi maxing out my 550's
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Old 07-23-2010, 01:21 PM   #5
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niice
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Old 07-23-2010, 01:21 PM   #6
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Begi cast mani
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Old 07-23-2010, 01:24 PM   #7
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I've been out of the game for a while. What's the best option for an intake mani nowadays?
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Old 07-23-2010, 01:27 PM   #8
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modified honda mani.
or one of the members (psi somthing) makes them now.
or make your own


You need bigger injectors too. ID1000's or DW800's would be great
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Old 07-23-2010, 01:37 PM   #9
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man I would love to go for a ride in a Miata that makes 250+whp...congrats man, build looks tasty.
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Old 07-23-2010, 02:04 PM   #10
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Looks good but needs absurd flow and an intake mani.
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Old 07-23-2010, 02:08 PM   #11
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more like 12-15% low unless their correction numbers are jacked...which they probably are.
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Old 07-23-2010, 04:12 PM   #12
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Gotpsi intake mani and better exhaust mani
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Old 07-24-2010, 01:12 PM   #13
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do you have a fuel pump?
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Old 07-24-2010, 01:19 PM   #14
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Quote:
Originally Posted by Aricjm15 View Post
do you have a fuel pump?
Yes. Walbro 255
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Old 07-24-2010, 03:07 PM   #15
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What is your exhaust? I spooled dick when I had stock exhuast.
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Old 07-24-2010, 03:07 PM   #16
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And were you running WI?
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Old 07-24-2010, 03:13 PM   #17
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I have a 3 inch exhaust with a flowmaster chambered muffler. Devils own water injection
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Old 07-24-2010, 03:35 PM   #18
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Get rid of that flowmaster and get something with a straight through design. Those chambers are horrible for flow
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Old 07-24-2010, 04:54 PM   #19
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Quote:
Originally Posted by wes65 View Post
I have a 3 inch exhaust with a flowmaster chambered muffler.
K, now I get to make fun of you. Get that POS muffler off the car and replace it with a big Magnaflow. Something you can literally roll a tennis ball through, please. There's no excuse for torque that doesn't peak until 5200rpm like that - you should be able to move that entire chart down 700rpm with just a muffler change.

Also, find a dyno operator that knows what he's doing. Starting pulls at 3500rpm =

Fix those two items and you should be able to see full torque in the ~4000rpm area, especially if that's a .64 A/R 2871R. Regardless of what the actual torque numbers are, just the torque line vs. RPM is pretty poor, and I bet it's all due to muffler and dyno operator error.
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Old 07-24-2010, 06:40 PM   #20
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Quote:
Originally Posted by wes65 View Post
I've been out of the game for a while. What's the best option for an intake mani nowadays?
I have seen big horsepower cars use the Edelbrock Super Victor.
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