GT2871R .86 Setup Dyno results
- redpotatoes
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GT2871R .86 Setup Dyno results
I recently upgraded from a GT2560R to a GT2871R .86.
Went back on the dyno to tune it at 14.5psi.
Previous dyno sheet and setup:
viewtopic.php?t=38014
Current setup:
97 Engine with a 95 intake
GT2871R .86 Turbo (Rebuilt with a ported wastegate)
555cc injectors
N60 Maf
Bottom mount manifold
Turbo elbow
Custom 3" downpipe
3" testpipe
3" BRM exhaust system
Custom 2.5" Intercooler piping
FMIC 28x7x2.5
BKR7E spark plugs
Walbro 255 fuel pump
JGS Vacuum block
Greddy BOV type rs
Greddy Profec-b spec II boost controller
S13 ECU (Almasi tuning)
Fidanza flywheel
Bully performance Stage 4 clutch kit
Dyno session took place on a dynapack 3000 (Disregard the 370cc T28 on top of the graph, it was from my old setup)
And here is my car:
Went back on the dyno to tune it at 14.5psi.
Previous dyno sheet and setup:
viewtopic.php?t=38014
Current setup:
97 Engine with a 95 intake
GT2871R .86 Turbo (Rebuilt with a ported wastegate)
555cc injectors
N60 Maf
Bottom mount manifold
Turbo elbow
Custom 3" downpipe
3" testpipe
3" BRM exhaust system
Custom 2.5" Intercooler piping
FMIC 28x7x2.5
BKR7E spark plugs
Walbro 255 fuel pump
JGS Vacuum block
Greddy BOV type rs
Greddy Profec-b spec II boost controller
S13 ECU (Almasi tuning)
Fidanza flywheel
Bully performance Stage 4 clutch kit
Dyno session took place on a dynapack 3000 (Disregard the 370cc T28 on top of the graph, it was from my old setup)
And here is my car:
Last edited by redpotatoes on Mon Feb 28, 2011 9:08 am, edited 3 times in total.
KA24DET GT2871R .86 Setup:
viewtopic.php?t=44222
viewtopic.php?t=44222
- Kfred
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Curves look pretty good, it could use a little more timing in the 5k-5.7k region though. Torque peaks really early, damn 232's .
Some bigger cams and a little work on the timing map and i bet you could see 40whp gains at the same boost level.
Looks like a fun setup, hope you are enjoying it.
Some bigger cams and a little work on the timing map and i bet you could see 40whp gains at the same boost level.
Looks like a fun setup, hope you are enjoying it.
RIP Nate(480sx)...
- redpotatoes
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The boost drop by 1psi in that region and yes the 232's are killing it... I have 248 exhaust cams in the garage but not sure I want to put them in for the moment. It's a stock block. The final run was with 1 degree less than previous and made the same power. I don't even know how it feels on the road yet !
KA24DET GT2871R .86 Setup:
viewtopic.php?t=44222
viewtopic.php?t=44222
- emo_tactical9
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I thought the torque came on kinda late for such a small turbo. I hoped to have a better curve than that with my T28.
Just call me Adam.
95 240: DIYPNP and T28.
08 Honda Fit
84 200sx: Sold after almost 10 years.
My file hosting:Calum,MegaSquirt,FSM
95 240: DIYPNP and T28.
08 Honda Fit
84 200sx: Sold after almost 10 years.
My file hosting:Calum,MegaSquirt,FSM
- redpotatoes
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.86 make the difference here and with my GT2560R, it was instant boost. Have a look at my previous setup.emo_tactical9 wrote:I thought the torque came on kinda late for such a small turbo. I hoped to have a better curve than that with my T28.
KA24DET GT2871R .86 Setup:
viewtopic.php?t=44222
viewtopic.php?t=44222
- kentoJDM240
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- redpotatoes
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Numbers are about the same except you have more torque.240sxTTE wrote:Here's my dyno graph with and w/o a boost controller. Same turbo. I had to limit my whp based on the class I run in. Also a few photos from the last event as a bonus.
KA24DET GT2871R .86 Setup:
viewtopic.php?t=44222
viewtopic.php?t=44222
- ppctx
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Very nice an Original Champaign color. Can you please provide your wheele, offset and tire size. Kudos to the person that took your at speed pics, they did a great job and have nice equipment.
Last edited by ppctx on Sat Sep 19, 2009 6:55 am, edited 1 time in total.
- tensecondrunr
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Thanks. The color has grown on me.ppctx wrote:Very nice an Original Champaign color. Can you please provide your wheele, offset and tire size. Kudos to the person that took your at speed pics, they did a great job and have nice equipment.
Front
Wheel - 17x8 +45 w/ 28.7mm spacer
Tire - 245/40R17 Hoosier
Rear
Wheel - 17x9 +40 w/ 16mm spacer
Tire - 245/45R17 Hoosier
or
Wheel - 17x9 +40 w/ 8mm spacer
Tire - 275/40R17 Hoosier
1993 240SX Hatch
NASA TTC Class
NASA TTC Class
I'm at an interesting point of developemnt with the car. The dyno graph above is from the first year, '06, when I first completed the car. Since then I have tuned it to 425 lb-ft of torque at 4,000 rpm. I have to maximize the torque because there currently is to no rule for torque and I compete against C5 Z06's and Vipers, which have huge torque across the entire range. I kept blowing head gaskets and finally solved the problem with L19 11mm head studs and O-rings on the block. Well.......I solved the head gasket issue but then cracked the block in multiple locations in between the stud hole and the coolant passage. What to do......TanManS14 wrote:Always loved that car. Its one thing to hit that power, its another to have it hold up to track abuse like that. Sick car, love the front splitter.
I decided to drop down a few classes and build an NA engine that will make 225 whp and rev reliably to 8K. It has crazy .500" lift cams, Q45 TB, xcessive manifold and a 5 1/2" quarter master clutch. We'll see.
Last edited by 240sxTTE on Mon Sep 21, 2009 2:11 pm, edited 2 times in total.
1993 240SX Hatch
NASA TTC Class
NASA TTC Class
- sdaigle240
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i LOVE your car, and more so ur style, but dear god, this is mister potatos thread!
airman wrote:I'm all about spreadsheets. Bitches love spreadsheets.
schmauster920 wrote:I shall cast my own pistons in the sands of time, then forge them in the depths of hell.. as funds allow
hy35 18psi Build Thread: viewtopic.php?t=38784
RIP MJL best friend of 20 years and the man who showed me 240s
- nissanfanatic
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- redpotatoes
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I am running 91 octane, no e85. A good tune make all the difference.240-kid wrote:Stock block w/ 14.5psi, your ECR should be ~13,46:1 correct me if I'm wrong and isnt that way to high for Pump Gas? Are you running E85?
KA24DET GT2871R .86 Setup:
viewtopic.php?t=44222
viewtopic.php?t=44222
- nissanfanatic
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I have an S13 chassis.
My blocks have been OEM, Frankenstein OEM configurations, and a homebuilt block with CP pistons/Pauter rods. OEM S13 and S14 cams, Crower cams, and Kelford cams.
A lot of the characteristics of what fuel you can run at what boost (dynamic compression ratio) comes from the combustion chamber design. Evos run up to 24psi on pump gas in California.
My blocks have been OEM, Frankenstein OEM configurations, and a homebuilt block with CP pistons/Pauter rods. OEM S13 and S14 cams, Crower cams, and Kelford cams.
A lot of the characteristics of what fuel you can run at what boost (dynamic compression ratio) comes from the combustion chamber design. Evos run up to 24psi on pump gas in California.
- redpotatoes
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I have a S14.240-kid wrote:Hmm, I always thought that you couldn't have higher than a 12.5:1 ECR w/o using Race gas, this is good to know Both of you guys are S13's correct?
KA24DET GT2871R .86 Setup:
viewtopic.php?t=44222
viewtopic.php?t=44222
- Chozen
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This is interesting. I would like to upgrade from my GT28R in the future, and thought about going with a higher flowing GT28 such as the 2871R or even higher. I am curious to know if a GT28/30R turbo with a T2 flange and a .86 turbine .A/R reduces backpressure enough at boost levels above 15psi. I am also curious to know if a T28 with the .82 or .86 .A/R would give anywhere near close to the reduction in backpressure that a T3 flanged turbine would give the KA. Basically for the same money, I can either keep my bottom mount and get a higher flowing GT27, or get a nice tubular manifold and a journal bearing T3/T4. Im torn. Thoughts anyone?
DIY or die.
- redpotatoes
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I don't agree with you. It's not a waste of time to have a TXX setup. If I were not on my stock block I would up the boost to 18-20psi and I am sure I would get near 400whp with some decent cams. Not such a waste for a TXX setup isn't it ?NateDogg wrote:T3 or you're wasting your time, unless you have some regulatory limitations like 240sxTTE.
KA24DET GT2871R .86 Setup:
viewtopic.php?t=44222
viewtopic.php?t=44222
- eazye2000
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I run a T2 flanged, 3076R .86ar with good results.Chozen wrote:I am curious to know if a GT28/30R turbo with a T2 flange and a .86 turbine .A/R reduces backpressure enough at boost levels above 15psi. Thoughts anyone?
Anything over 18psi on the stock internal wastegate would give me insane backpressure. Even melting, and blowing out a copper turbine inlet gasket.
I have since, externally gated the manifold with a 38mm gate. External gate holds 12psi just fine, and I have run upwards of 28psi without blowing out gaskets.
(pics on request)
Don't listen to the people who hate the T2 guys because our turbo's spool faster than theirs..
- Chozen
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Ive been on a 38mm external gate from the jump, I think that I will probably go T3/T4 60 trim with a top mount manifold. The one thing I am wondering is if I go to a topmount T3/T4, what elbow/downpipe options are there? If I use a JGS log manifold, I could use their downpipe and elbow, but what if I wanted to run a Peak Boost tubular top mount or something similar (no ebay top mount)? Just never been too clear on that issue.
DIY or die.