GT2871R .86 Setup Dyno results

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redpotatoes
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GT2871R .86 Setup Dyno results

Post by redpotatoes » Thu Sep 10, 2009 3:23 pm

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)

Image


And here is my car:

Image
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

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zenki-des
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Post by zenki-des » Thu Sep 10, 2009 3:27 pm

damn nice power on 14psi 315lb nice
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wtf is juice nigga i want that purple stuff
98 240sx t28
264lb/220hp
274/270lb 20g 12psi

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Kfred
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Post by Kfred » Thu Sep 10, 2009 3:43 pm

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 :x.

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)...

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redpotatoes
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Post by redpotatoes » Thu Sep 10, 2009 3:48 pm

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

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Kfred
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Post by Kfred » Thu Sep 10, 2009 4:07 pm

Oh, i'm not used to unsteady boost problems. The single best mod i've ever done since my initial turbo install 3.5-4years ago was switching out my 232s for 272s. Huge power increase up top, i repeat huge!

I'd play it safe on the stock block as well lol. Good luck with your car.
RIP Nate(480sx)...

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Post by emo_tactical9 » Thu Sep 10, 2009 7:33 pm

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.
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Post by redpotatoes » Fri Sep 11, 2009 5:05 am

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.
.86 make the difference here and with my GT2560R, it was instant boost. Have a look at my previous setup.
KA24DET GT2871R .86 Setup:
viewtopic.php?t=44222

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Post by 240sxTTE » Fri Sep 18, 2009 8:29 am

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.



Image

Image

Image

Image

Image
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Post by kentoJDM240 » Fri Sep 18, 2009 8:36 am

You car looks great man, Good numbers congrats on your sexi fcukin 240..

-Kento
1995 240sx se. Engine out
1990 SOHC Sold
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Post by redpotatoes » Fri Sep 18, 2009 3:44 pm

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.
Numbers are about the same except you have more torque.
KA24DET GT2871R .86 Setup:
viewtopic.php?t=44222

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ppctx
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Post by ppctx » Fri Sep 18, 2009 8:31 pm

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.

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Post by tensecondrunr » Fri Sep 18, 2009 9:39 pm

this thread just gave me so much more respect for the t28! that torque is impressive! good work
95 240sx KA with the T! on the way..
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Post by TanManS14 » Fri Sep 18, 2009 11:01 pm

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.
It's always broken.

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Post by turbonola » Sat Sep 19, 2009 12:19 pm

240sxTTE's car was in sport compact car a while back. that car is the sex!!!!!!!!!!!
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Post by 240sxTTE » Mon Sep 21, 2009 1:56 pm

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.
Thanks. The color has grown on me.

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

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Post by 240sxTTE » Mon Sep 21, 2009 2:06 pm

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'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......

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.
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Post by 240sxTTE » Mon Sep 21, 2009 2:07 pm

turbonola wrote:240sxTTE's car was in sport compact car a while back. that car is the sex!!!!!!!!!!!
Thanks.

Once I get the NA engine completed I'm going to try and get in Modified mag.

Also I forgot to add above.......the NA engine will run on E85!
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Post by RAMM » Wed Sep 23, 2009 7:56 pm

How can you just sit there and brag about this N/A engine!!! lol

I WANT DETAILS! That's awesome
S14 KA-T2871r
GET GRIP FEELING!!!

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Post by sdaigle240 » Wed Sep 23, 2009 8:40 pm

i LOVE your car, and more so ur style, but dear god, this is mister potatos thread!
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Post by 240-kid » Fri Sep 25, 2009 12:28 am

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?
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Post by nissanfanatic » Fri Sep 25, 2009 8:33 am

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?
I have run 14psi stock blocks for a few years. I'm built now, but I still run 15psi on pump gas. It is safe when tuned.
-Cory

1992 Nissan 240sx KA24DE-Turbo [ GONE ]
1995 Subaru Impreza L AWD [ OK ]
2000 Honda S2000 [ GONE ]
2003 Infiniti G35 Sport Coupe [ GONE ]
1986 Ford F-250 4x4 International IDI Diesel [ GONE ]
2003 Mitsubishi Lancer Evolution [ GONE ]
2004 Subaru WRX Wagon [ GONE ]
2009 Honda Fit Sport [ OK ]
2002 BMW 325i Sedan [ OK ]

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Post by redpotatoes » Fri Sep 25, 2009 10:34 am

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?
I am running 91 octane, no e85. A good tune make all the difference.
KA24DET GT2871R .86 Setup:
viewtopic.php?t=44222

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Post by 240-kid » Fri Sep 25, 2009 2:26 pm

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?
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Post by nissanfanatic » Fri Sep 25, 2009 3:21 pm

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.
-Cory

1992 Nissan 240sx KA24DE-Turbo [ GONE ]
1995 Subaru Impreza L AWD [ OK ]
2000 Honda S2000 [ GONE ]
2003 Infiniti G35 Sport Coupe [ GONE ]
1986 Ford F-250 4x4 International IDI Diesel [ GONE ]
2003 Mitsubishi Lancer Evolution [ GONE ]
2004 Subaru WRX Wagon [ GONE ]
2009 Honda Fit Sport [ OK ]
2002 BMW 325i Sedan [ OK ]

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Post by redpotatoes » Fri Sep 25, 2009 3:52 pm

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?
I have a S14.
KA24DET GT2871R .86 Setup:
viewtopic.php?t=44222

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Post by Chozen » Thu Oct 29, 2009 5:24 am

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?
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Post by NateDogg » Thu Oct 29, 2009 9:42 am

T3 or you're wasting your time, unless you have some regulatory limitations like 240sxTTE.
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Post by redpotatoes » Thu Oct 29, 2009 10:03 am

NateDogg wrote:T3 or you're wasting your time, unless you have some regulatory limitations like 240sxTTE.
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 ?
KA24DET GT2871R .86 Setup:
viewtopic.php?t=44222

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Post by eazye2000 » Thu Oct 29, 2009 6:37 pm

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?
I run a T2 flanged, 3076R .86ar with good results.
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.. 8)
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Post by Chozen » Fri Oct 30, 2009 5:01 am

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.
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