NB built BP4W, GT2560R, 16-17psi
Numbers : 296.22whp @ 5950rpm / 302.6 ftlb @4700rpm 84.5mm wiseco 8.5:1 , cometic hg Manley rods, arp head/main studs Squaretop/bp5a cam, bone stock head FM manifold, 2.5" dp, custom 3" exhaust borla xr1 Vibrant 12800 fmic, 2" hot/2.5" cold piping Hydra 2.5 Ems, stock ignition coils Rc550 injectors, dw200 pump Supermiata 4 puck, 6 speed, 3.9 torsen Couldn't get the tq to read, kept getting a bad signal for the pickup but it's in the neighborhood of 300ft/lb. 16-17psi the turbo is literally tapped out, just like Ken Hill I couldn't get it to hold more than 16psi to redline. It's closer to 18psi in the mid-range. Timing is 15* tapering up to 20* at redline. It was 74* outside today, if it was the dead of winter the car would make more than 300. I really wanted to break 300 but it's just really hard to do with a FM manifold and 2560 with 2.5" downpipe. I've been driving this car with this tune since last summer, just wanted to Dyno it to find out where it was at. https://cimg5.ibsrv.net/gimg/www.mia...2eaf805596.jpg |
That's awesome numbers from a 2560, we almost have the same setup, except the turbo and IM.
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Originally Posted by lsc224
(Post 1529927)
That's awesome numbers from a 2560, we almost have the same setup, except the turbo and IM.
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Originally Posted by andyfloyd
(Post 1529945)
Thanks man, I've been running this setup since June of last year. It's been great. What turbo are you running?
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Originally Posted by lsc224
(Post 1529956)
I was running a Chinese BEGi 2871 on my original setup and now I am running a Disco Potato, a 2860. A little fasterspool up than the Chinese 2871. So far I am happy with the 2860. Running it at about 19psi but haven't dynoed it yet. I'm probably close to 300hp.
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Originally Posted by andyfloyd
(Post 1529965)
Yea Ive never been a fan of the Chinese T28 stuff. They work but they are laggier and in a lot of cases make much less power. Are you running a GT2860RS or the newer GTX series? Definitely get back on the dyno with the new setup, @19psi Im sure you will be right at 300whp or more.
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Interesting, I was able to hold 20 psi at 7200 rom in my old nb2 on a 2560. Wonder if the wga is allowing the puck to blow open.
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Originally Posted by vteckiller2000
(Post 1530067)
Interesting, I was able to hold 20 psi at 7200 rom in my old nb2 on a 2560. Wonder if the wga is allowing the puck to blow open.
I was thinking that maybe I have reached the flow limit of the compressor eariler since I do have a 84.5mm bore, Squaretop, and BP5A cam that all are increasing the flow needed at the compressor. 296whp is pretty good for a 2560R, if I was able to hold more to redline I dont know that it would net me much more whp. The 2560R compressor flows 34-35lb/min @ 1 bar, and with drivetrain loss Im probably around 330hp at the flywheel which when checking the compressor chart shows Im right at the surge line. Did you ever dyno yours @20psi? Wondering what you made. |
His was VVT, 8.5:1, squaretop. There isn't a flow difference worth discussing between the two motors in question. :)
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Originally Posted by concealer404
(Post 1530099)
His was VVT, 8.5:1, squaretop. There isn't a flow difference worth discussing between the two motors in question. :)
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Yeah you're making good power, i wouldn't sweat it.
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Originally Posted by concealer404
(Post 1530106)
Yeah you're making good power, i wouldn't sweat it.
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More power = more breaking stuff = car sucks.
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Since I didnt get a torque readout from the pickup I plotted the torque based on rpm/speed at Various points on the dyno chart. To my surprise I made 301ft/lb @4300 rpm. So my actual numbers were 296whp/301ftlb. The car is hitting 19psi brefily at 4200-4500rpm and then settles down to 17ish until 5800 then it tapers down to 16psi from 5900-7200. I wish this turbo had just a little more compressor to hold the boost to 7200 better.
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You could try a water injection setup and spray into the compressor, that would get you over 300. I wouldn't worry about the compressor wheel, they aren't that expensive. Great numbers Andy!
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Originally Posted by 1RMDave
(Post 1530396)
You could try a water injection setup and spray into the compressor, that would get you over 300. I wouldn't worry about the compressor wheel, they aren't that expensive. Great numbers Andy!
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Originally Posted by andyfloyd
(Post 1530413)
I could do a WI setup, but the next logical step Im planning on is 1000cc injectors and e85. There are multiple stations right near my house that sell e85. Im curious how much ill gain with e85 on my setup since Im already pushing the turbo pretty hard already.
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If anyone's curious what the tq plot looked like here it is. I used the k Miata gear calculator and a program that derives tq from HP and rpm and graphed it on the hp plot. Full boost is achieved @ 3500rpm @18-19psi. Tapers to 16psi by 5700 and holds to redline.
https://cimg1.ibsrv.net/gimg/www.mia...56ebfced4d.jpg |
I'm heading to the dyno this weekend with a similar setup. Stock long block, BP5A cam, begi cast manifold, 2560, 3" down pipe and exhaust, sheet metal intake. I've been tracking it at 14psi for a couple of years but my goals this weekend is to verify the torque output and try to stretch that 225 ft/lbs all the way to redline. I'm trying to keep the rods inside the block so it'll take some fancy footwork.
Ran mid 12's @ 108 on this setup. |
Originally Posted by Bronson M
(Post 1535204)
I'm heading to the dyno this weekend with a similar setup. Stock long block, BP5A cam, begi cast manifold, 2560, 3" down pipe and exhaust, sheet metal intake. I've been tracking it at 14psi for a couple of years but my goals this weekend is to verify the torque output and try to stretch that 225 ft/lbs all the way to redline. I'm trying to keep the rods inside the block so it'll take some fancy footwork.
Ran mid 12's @ 108 on this setup. |
Yeah it's gonna be interesting, have an HPDE the following weekend so a little more top end pull will keep those pesky vetts close enough in the straits to bug em in the turns. I can keep the revs between 5000-7400 which should be high enough to make the HP without the torque
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Originally Posted by Bronson M
(Post 1535209)
Yeah it's gonna be interesting, have an HPDE the following weekend so a little more top end pull will keep those pesky vetts close enough in the straits to bug em in the turns. I can keep the revs between 5000-7400 which should be high enough to make the HP without the torque
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Originally Posted by andyfloyd
(Post 1535210)
Im pretty impressed your doing all this on the stock bottom end. Are you going to try to taper boost to redline to maintain tq? Like say youve got 10psi @ 4k but then past 5000rpm feed in more boost to end up at like 16-17 by redline?
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Originally Posted by Bronson M
(Post 1535211)
That's exactly what I plan to do, I start at 10psi at 4k now and ramp to 14psi by 5.5k.
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92 octane? Stock fpr?
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For me, yes 93 octane, 650cc injectors, walbro 190 on stoc NB FPR. I'm seeing right at 80% duty cycle with 62psi and 11.4ish AFR's
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Originally Posted by B Mike
(Post 1535301)
92 octane? Stock fpr?
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Originally Posted by Bronson M
(Post 1535302)
For me, yes 93 octane, 650cc injectors, walbro 190 on stoc NB FPR. I'm seeing right at 80% duty cycle with 62psi and 11.4ish AFR's
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Yeah the wheel has seen some things, the small chip isn't too bad but it's there. It's not a 28 wheel as far as I know, just a journal bearing 2560. Duty cycle is duty cycle, so should be the same. I'm running pretty rich, that might explain the difference......or I'm just making way more than i think.
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Originally Posted by andyfloyd
(Post 1535305)
Your duty cycle suggests you are in the 300whp range. I'm actually surprised my duty isn't higher honestly. Maybe the Hydra and ms3 read duty cycle differently? I'm really curious what kinda power your making. I read your build thread, in one picture I saw your turbine wheel. It looked clipped and I swear it has one less blade than mine. Is it a straight 2560? Or do you have a gt28 turbine wheel?
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Originally Posted by Bronson M
(Post 1535306)
Yeah the wheel has seen some things, the small chip isn't too bad but it's there. It's not a 28 wheel as far as I know, just a journal bearing 2560. Duty cycle is duty cycle, so should be the same. I'm running pretty rich, that might explain the difference......or I'm just making way more than i think.
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Originally Posted by B Mike
(Post 1535307)
The fuel pump might be helping.
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I data log my fuel pressure and actually had a 255, it does over power the NB regulator at low PW, would rock up to 70psi and caused all kinds of funky transient fueling issues. I would see about 58psi at redline with the 255 still, with the 190 I see 56-57 psi. I chalk this up to pressure drop through the lines since both pumps are over kill for this power level.
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Originally Posted by Bronson M
(Post 1535310)
I data log my fuel pressure and actually had a 255, it does over power the NB regulator at low PW, would rock up to 70psi and caused all kinds of funky transient fueling issues. I would see about 58psi at redline with the 255 still, with the 190 I see 56-57 psi. I chalk this up to pressure drop through the lines since both pumps are over kill for this power level.
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Where I saw the problem was on AE, if I was at part throttle the fuel pressure would be at 62 psi and on a throttle stab the motor would want a certain amount of AE. If I was off the throttle in overrun the fuel pressure would be in the low 70's and a throttle stab would nearly drown the motor.
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Originally Posted by Bronson M
(Post 1535314)
Where I saw the problem was on AE, if I was at part throttle the fuel pressure would be at 62 psi and on a throttle stab the motor would want a certain amount of AE. If I was off the throttle in overrun the fuel pressure would be in the low 70's and a throttle stab would nearly drown the motor.
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For the others that are following along, my dyno day was a bust. I have some odd issue going on where the motor is surging and not making power. Replaced coils and plugs with no improvement, changing cam and crank sensors next and then fixing with an LS swap after that.........aren't race cars fun.
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Originally Posted by Bronson M
(Post 1535685)
For the others that are following along, my dyno day was a bust. I have some odd issue going on where the motor is surging and not making power. Replaced coils and plugs with no improvement, changing cam and crank sensors next and then fixing with an LS swap after that.........aren't race cars fun.
It really sucks that it runs perfect for so long then hates life right when you want to Dyno it lol. I understand the LS swap thing, however I actually like the BP... This makes me tarded' obviously. |
I like this engine build. I just need rods-head-exhaust and should be close to your numbers. 300 seems to be the max before things get pricey.
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Originally Posted by B Mike
(Post 1535933)
I like this engine build. I just need rods-head-exhaust and should be close to your numbers. 300 seems to be the max before things get pricey.
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I'm kinda jealous of your setup Andy. We made very similar power but you have a much better powerband. At 3500 you have like 100tq on me.
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Originally Posted by 1RMDave
(Post 1540957)
I'm kinda jealous of your setup Andy. We made very similar power but you have a much better powerband. At 3500 you have like 100tq on me.
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Originally Posted by andyfloyd
(Post 1540961)
Haha, my turbo spools faster but yours holds power up top better than mine. I really like your setup because it still has more headroom in the turbo to go for more. Mine is completely tapped out turbo wise.
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Originally Posted by andyfloyd
(Post 1530413)
I could do a WI setup, but the next logical step Im planning on is 1000cc injectors and e85. There are multiple stations right near my house that sell e85. Im curious how much ill gain with e85 on my setup since Im already pushing the turbo pretty hard already.
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Originally Posted by 1RMDave
(Post 1541024)
I still think I would rather have yours! Better for daily driving. I rarely rev mine out, either spins tires or just wayy too fast in the city haha. I wish my map sensor had more headroom, I'm on the ragged edge of the map right now so I hit boost cut if the weather is cool. Hopefully I can get a 3 bar map sensor installed in a few weeks, maybe tune for 25psi and leave a few psi headroom for boost cut. Too bad you don't live closer, be cool to compare setups.
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Originally Posted by ridethecliche
(Post 1541099)
Just install an external map sensor. It'll be fine.
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