GT2871 USERS. SR motor - Page 5 - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

Brian W. · 02-12-2008, 04:13 PM

Quote:

Originally Posted by OBEEWON

Did you have any problems with the Crower Stage 3 cams? That number seems a little low.

no problem with the cams and ive installed them in other motors too.

you really think that # is low?

it would be almost 440whp on a Dynojet.

and im running 93 octane pump gas.

jspaeth · 02-12-2008, 11:11 AM

A lot of power, but seems lag-a-riffic to me.

Evans uses dynopack dyno..., where the hubs mount directly to these splined axles that spin inside this hydrauliclly load-changing device.

^ How does dyno dynamics numbers translate into other types?

steve shadows · 02-12-2008, 11:16 AM

Dyna-Packs are good dynos.

They can do most of the the things the Dyno Dynamics does without overheating with overheating

so in comparison they are not as good as an overall investment imo.

for tuning and power pulls it should be fine, but they overheat pretty easy.

We did 291 HP 280 Trq at 15.5 psi on Jordans car with a stock s14 long block.

what tires do you have that you are breaking loose that easy? do you have a clutch type LSD? should help a bit.

Take your dynodynamics number multiply it by 1.16 = usually equals Dyno Jet number.

Dyna-Packs are usually like 5% less than Dyno Dynamics depends on some other factors, including that the mass of the wheels is actually

removed from the equation.

blueshark123 · 02-12-2008, 04:38 PM

Quote:

Originally Posted by jspaeth

A lot of power, but seems lag-a-riffic to me.

Evans uses dynopack dyno..., where the hubs mount directly to these splined axles that spin inside this hydrauliclly load-changing device.

^ How does dyno dynamics numbers translate into other types?

Evans does great tunes. Hes a real good guy he tuned my brothers car that made 650whp on race gas. We also took my brothers car on a dyno dynamics and we got the same numbers on that dyno. He also can weld sick intercooler piping i hope that i will get tuned by him in the future.

Brian W. · 02-12-2008, 01:52 PM

yeah my setup is a bit laggy. if i used smaller cams and stock intake plenum i could avoid that but i prefer the peaky powerband.

from what ive seen personally Dyno Dynamics read 13-15% lower than Dynojet #s.

jspaeth · 02-12-2008, 02:39 PM

Steve have stock VLSD which fails, I know

Also, have 245/40/17 Kumho MX all the way around, with a 220 treadwear rating.

I need to fine tune my AVC-R to make the boost come in smoother.

Either that, or lower the boost in 1st and 2nd.

On the highway, going 80, downshift into 4th, and she pulls like a bat out of hell

steve shadows · 02-12-2008, 03:17 PM

Yeah HP is fun huh, wait until that isnt enough.

It will be on most road courses.

but the addiction overall never goes away when messing around

jspaeth · 02-12-2008, 04:57 PM

So according to Steve's calculation, to go from Dyna-pack to Dynojet numbers, you should multiply by ~1.21

hmmm...i like the sound of that!

codyace · 02-12-2008, 10:05 PM

Quote:

Originally Posted by jspaeth

Jeff Evans is owner of Evans Tuning.....word on the street is that he is one of the top tuners in the entire country....has tuned 1000's of cars, including FullRace shop car, president of Apex's car, etc.

www.evans-tuning.com

Jeff is incredibly talented at what he does, and is as honest as one can get with advice. He's not one to deal with BS, and is usually pretty reserved, that is unless you start picking his brain.

He is certainly one of our countries Top (if not the) Honda Tuners (and tuners in general).

Quote:

Originally Posted by steve shadows

Yeah HP is fun huh, wait until that isnt enough.

It will be on most road courses.

but the addiction overall never goes away when messing around

Haha, boost= crack and crack=kills

Quote:

Originally Posted by jspaeth

So according to Steve's calculation, to go from Dyna-pack to Dynojet numbers, you should multiply by ~1.21

hmmm...i like the sound of that!

Don't get tooo caught up in the numbers game with these dynos. Get it to the strip and give us a trap speed

Wait till you get some cams in there, you will be very very very happy (get JWT s3's heheh)

And 440 whp on that .86 Brian W? Seems a bit high to be estimating like that. Not doubting, just would love to see an actual number....with that said, are you guys the closest DynoDynamics to me (Poconos PA)....I may need to take a trip to satisfy Steve

steve shadows · 02-13-2008, 09:53 AM

Quote:

Originally Posted by jspaeth

So according to Steve's calculation, to go from Dyna-pack to Dynojet numbers, you should multiply by ~1.21

hmmm...i like the sound of that!

Naw, more like 1.16

Quote:

Originally Posted by codyace

And 440 whp on that .86 Brian W? Seems a bit high to be estimating like that. Not doubting, just would love to see an actual number....with that said, are you guys the closest DynoDynamics to me (Poconos PA)....I may need to take a trip to satisfy Steve

Yeah I would say more like 420 range

Whe I did 375 on the DD I did 419 on the DJ

Back to Back

Brian W. · 02-13-2008, 11:11 AM

Quote:

Originally Posted by steve shadows

Naw, more like 1.16

Yeah I would say more like 420 range

Whe I did 375 on the DD I did 419 on the DJ

Back to Back

yeah, well even still i wouldnt say 420whp is a low # for my setup at all. that was with a 15% correction. a 13% correction would be 420whp.

and we probably are the closest Dyno Dynamics to you. feel free to shoot me an email or give us a call. our prices on dyno time are reasonable for sure.

OBEEWON · 02-13-2008, 04:58 PM

Quote:

Originally Posted by Brian W.

yeah, well even still i wouldnt say 420whp is a low # for my setup at all. that was with a 15% correction. a 13% correction would be 420whp.

and we probably are the closest Dyno Dynamics to you. feel free to shoot me an email or give us a call. our prices on dyno time are reasonable for sure.

420 sounds more right. Ive seen 458 on the .86 which is what you get close to if you do the multiplication. Im not sure what dyno that was on though.

Anyone else have problems with Crower 272's post up please because every tuner I have been to has been stumped.

steve shadows · 02-13-2008, 05:04 PM

Quote:

Originally Posted by OBEEWON

420 sounds more right. Ive seen 458 on the .86 which is what you get close to if you do the multiplication. Im not sure what dyno that was on though.

Im pretty sure I saw the same graph on Freshalloy and it was a DynoJet

codyace · 02-21-2008, 10:39 AM

Quote:

Originally Posted by steve shadows

-10 is about right at idle.

If your using an auto-meter gauge who knows, those things are soo far off most of the time.

My gauge will read like 24 psi sometimes, and my haltech data log and the dyno will both ready a spike no higher than 19 psi :ghey:

Never had an issue with any of my Autometers or VDO's when compared with logging values with the Innovate LM1 and the map sensor....I should really get that setup back together and use it on a dyno run mmmm MAF car with logged boost hotness. What Autometer version/type where you using Stevie?

Quote:

Originally Posted by rotation3x

Im getting my motor back in my car this weekend or next weekend. I got the gt2871r .64 and I was kinda wondering what to expect from it with stock cams and manifolds. Eventually I plan to get the BC 264's since it will be street driven.

It'll run ok, make the tradiational 310-330 whp....quick spooler, but def a turbo that LOVES low 26x duration cams.

Quote:

Anyone know what the stock setting is on the 2871's wastegate actuator and how much boost it can handle?

Reliably? Maybe about one bar. I've been able to boost 19-20 with just the wastegate...that's creeping and holding to redline.

Quote:

Originally Posted by OBEEWON

Anyone else have problems with Crower 272's post up please because every tuner I have been to has been stumped.

I know FWD guys using the cams have had to spend some time dialing them in with cam gears to get them to work right. Not sure why'd you want 272's with a t2 based turbo though....

smelly240 · 02-13-2008, 07:04 AM

evans has a pretty nice dynapack... My one friend got tuned with his ls-vtec 2.0L with a 3076r - made 420whp on 17psi-pump gas

hes mainly for hondas, but will tune almost anything. And his dynapack might read high - we took same exact car to a dynojet and it made 385. coulda been the weather or some other factor ???

hes always booked pretty solid or at least he was last summer.

codyace · 02-13-2008, 11:06 AM

Quote:

Originally Posted by smelly240

evans has a pretty nice dynapack...

And a great shop. Very clean and professional. His Dad's T-Bird shop is awesome too!

Quote:

Originally Posted by smelly240

hes mainly for hondas, but will tune almost anything. And his dynapack might read high - we took same exact car to a dynojet and it made 385. coulda been the weather or some other factor ???

I've seen it read that way as well on some cars, and then damn near equal to D/J numbers on others...

Quote:

Originally Posted by smelly240

hes always booked pretty solid or at least he was last summer.

he's always booked a few weeks, sometimes months in advance. again, great tuner for anyone in the PA/NJ/DE/MD/NY area....

spools420a · 09-07-2015, 02:45 PM

Is the twisted motion v1 gt2871r a good start I'm looking for 280-300whp and I'm looking at the twisted motion one since there $350 shipped.what a/r would be best for this.there's 3 gt2871 types correct? So I take it the smallest one should be what I need you think?I would rather go disco potato or s15 turbo for these lower HP numbers but there just too expensive compared to that twisted motion gt2871r please let me know,thanks.

jspaeth · 02-13-2008, 08:07 AM

Codyace....I was just playing on the numbers....again, the best measure is taking it to the drag strip, assuming equal driving skill

water · 02-29-2008, 09:53 AM

Quote:

Originally Posted by jspaeth

Codyace....I was just playing on the numbers....again, the best measure is taking it to the drag strip, assuming equal driving skill

Thank you. I'm glad someone else realizes that dyno charts are more or less useless for anything other than tuning and a general idea of power. There's no magic in anyone's setup when the trap speeds they hit at the track are that of the average 360ish whp setups.

Moral: don't get caught up in numbers people.

OBEEWON · 02-13-2008, 05:08 PM

I've seen that also, But the setup I was reffering to was a guy up in Jersey. I saw his car in person

A question for those with or familiar with 272's. What type of vac numbers at idle. I'm at 7-9 no more than 10 and Im sure thats wrong hinting to an issue with these cams.

steve shadows · 02-13-2008, 05:12 PM

-10 is about right at idle.

If your using an auto-meter gauge who knows, those things are soo far off most of the time.

My gauge will read like 24 psi sometimes, and my haltech data log and the dyno will both ready a spike no higher than 19 psi :ghey:

OBEEWON · 02-13-2008, 07:55 PM

Quote:

Originally Posted by steve shadows

-10 is about right at idle.

If your using an auto-meter gauge who knows, those things are soo far off most of the time.

My gauge will read like 24 psi sometimes, and my haltech data log and the dyno will both ready a spike no higher than 19 psi :ghey:

I never got the details of your setup. What cams are you using?

DanDriftS13 · 02-13-2008, 05:44 PM

-10 sounds about right for 272's because I have crower 264's in mine and I'm seeing about 16-17 vacuum at idle.

smelly240 · 02-13-2008, 05:49 PM

i get what dandrifts13 gets - i think anyways - my shits in bar.

DanDriftS13 · 02-13-2008, 05:50 PM

Quote:

Originally Posted by smelly240

i get what dandrifts13 gets - i think anyways - my shits in bar.

a tad more than 1bar?

smelly240 · 02-13-2008, 06:50 PM

somethin like that

its too cold to start that stupid thing up - plus its all unpainted so i dont even wanna look at it.

OBEEWON · 02-13-2008, 07:53 PM

Quote:

Originally Posted by smelly240

somethin like that

its too cold to start that stupid thing up - plus its all unpainted so i dont even wanna look at it.

Lol, your non paint looks better than my 'paint.'

s13envy · 02-21-2008, 09:15 AM

the info i gave about the cams came from steward engines. The same guys that build heads and blocks for enjuku racing.

OBEEWON · 02-21-2008, 09:29 AM

Quote:

Originally Posted by s13envy

the info i gave about the cams came from steward engines. The same guys that build heads and blocks for enjuku racing.

Can you give me specifics? I contacted BC and they arent being very receptive. Im going to a machine shop to get them looked over, but a little more info would be helpful.

s13envy · 02-23-2008, 10:12 AM

Quote:

Originally Posted by OBEEWON

Can you give me specifics? I contacted BC and they arent being very receptive. Im going to a machine shop to get them looked over, but a little more info would be helpful.

only thing i know is that they centerline of the cams have been known to be off by a few degrees. basically saying the cams aren't timed correctly. Which can be fixed by adjustable cam gears.

02-12-2008, 11:11 AM	#2
jspaeth Nissanaholic! Join Date: Mar 2006 Location: Philadelphia suburbs Age: 40 Posts: 2,347 Trader Rating: (7) Rides Gallery: jspaeth Feedback Score: 7 reviews	A lot of power, but seems lag-a-riffic to me. Evans uses dynopack dyno..., where the hubs mount directly to these splined axles that spin inside this hydrauliclly load-changing device. ^ How does dyno dynamics numbers translate into other types? __________________ Daily driven

02-12-2008, 11:16 AM	#3
steve shadows Post Whore! Join Date: Aug 2003 Location: LA and OC Posts: 8,202 Trader Rating: (5) Feedback Score: 5 reviews	Dyna-Packs are good dynos. They can do most of the the things the Dyno Dynamics does without overheating with overheating so in comparison they are not as good as an overall investment imo. for tuning and power pulls it should be fine, but they overheat pretty easy. We did 291 HP 280 Trq at 15.5 psi on Jordans car with a stock s14 long block. what tires do you have that you are breaking loose that easy? do you have a clutch type LSD? should help a bit. Take your dynodynamics number multiply it by 1.16 = usually equals Dyno Jet number. Dyna-Packs are usually like 5% less than Dyno Dynamics depends on some other factors, including that the mass of the wheels is actually removed from the equation. __________________ Like Me on FaceBook !

02-12-2008, 01:52 PM	#5
Brian W. Zilvia.net Advertiser Join Date: Feb 2004 Location: Baltimore, MD Age: 40 Posts: 1,146 Trader Rating: (8) Feedback Score: 8 reviews	yeah my setup is a bit laggy. if i used smaller cams and stock intake plenum i could avoid that but i prefer the peaky powerband. from what ive seen personally Dyno Dynamics read 13-15% lower than Dynojet #s. __________________ www.ma-motorsports.com -Fab work, builds, swaps, dyno tuning

02-12-2008, 02:39 PM	#6
jspaeth Nissanaholic! Join Date: Mar 2006 Location: Philadelphia suburbs Age: 40 Posts: 2,347 Trader Rating: (7) Rides Gallery: jspaeth Feedback Score: 7 reviews	Steve have stock VLSD which fails, I know Also, have 245/40/17 Kumho MX all the way around, with a 220 treadwear rating. I need to fine tune my AVC-R to make the boost come in smoother. Either that, or lower the boost in 1st and 2nd. On the highway, going 80, downshift into 4th, and she pulls like a bat out of hell __________________ Daily driven

02-12-2008, 03:17 PM	#7
steve shadows Post Whore! Join Date: Aug 2003 Location: LA and OC Posts: 8,202 Trader Rating: (5) Feedback Score: 5 reviews	Yeah HP is fun huh, wait until that isnt enough. It will be on most road courses. but the addiction overall never goes away when messing around __________________ Like Me on FaceBook !

02-12-2008, 04:57 PM	#8
jspaeth Nissanaholic! Join Date: Mar 2006 Location: Philadelphia suburbs Age: 40 Posts: 2,347 Trader Rating: (7) Rides Gallery: jspaeth Feedback Score: 7 reviews	So according to Steve's calculation, to go from Dyna-pack to Dynojet numbers, you should multiply by ~1.21 hmmm...i like the sound of that! __________________ Daily driven

02-13-2008, 07:04 AM	#15
smelly240 Nissanaholic! Join Date: Oct 2006 Location: Philaburbia Age: 46 Posts: 2,137 Trader Rating: (4) Feedback Score: 4 reviews	evans has a pretty nice dynapack... My one friend got tuned with his ls-vtec 2.0L with a 3076r - made 420whp on 17psi-pump gas hes mainly for hondas, but will tune almost anything. And his dynapack might read high - we took same exact car to a dynojet and it made 385. coulda been the weather or some other factor ??? hes always booked pretty solid or at least he was last summer. __________________ HREs on a S13 - check, 6262 - check, Girlfriend.... - nope

09-07-2015, 02:45 PM	#17
spools420a Zilvia Junkie Join Date: Dec 2009 Location: phoenix az Age: 42 Posts: 460 Trader Rating: (1) Feedback Score: 1 reviews	Is the twisted motion v1 gt2871r a good start I'm looking for 280-300whp and I'm looking at the twisted motion one since there $350 shipped.what a/r would be best for this.there's 3 gt2871 types correct? So I take it the smallest one should be what I need you think?I would rather go disco potato or s15 turbo for these lower HP numbers but there just too expensive compared to that twisted motion gt2871r please let me know,thanks.

02-13-2008, 08:07 AM	#18
jspaeth Nissanaholic! Join Date: Mar 2006 Location: Philadelphia suburbs Age: 40 Posts: 2,347 Trader Rating: (7) Rides Gallery: jspaeth Feedback Score: 7 reviews	Codyace....I was just playing on the numbers....again, the best measure is taking it to the drag strip, assuming equal driving skill __________________ Daily driven

02-13-2008, 05:08 PM	#20
OBEEWON Post Whore! Join Date: Feb 2006 Location: Hightened State of Emergency Posts: 6,053 Trader Rating: (9) Feedback Score: 9 reviews	I've seen that also, But the setup I was reffering to was a guy up in Jersey. I saw his car in person A question for those with or familiar with 272's. What type of vac numbers at idle. I'm at 7-9 no more than 10 and Im sure thats wrong hinting to an issue with these cams. __________________

02-13-2008, 05:12 PM	#21
steve shadows Post Whore! Join Date: Aug 2003 Location: LA and OC Posts: 8,202 Trader Rating: (5) Feedback Score: 5 reviews	-10 is about right at idle. If your using an auto-meter gauge who knows, those things are soo far off most of the time. My gauge will read like 24 psi sometimes, and my haltech data log and the dyno will both ready a spike no higher than 19 psi :ghey: __________________ Like Me on FaceBook !

02-13-2008, 05:44 PM	#23
DanDriftS13 Leaky Injector Join Date: Feb 2008 Location: Orlando, Fl Age: 36 Posts: 91 Trader Rating: (0) Feedback Score: 0 reviews	-10 sounds about right for 272's because I have crower 264's in mine and I'm seeing about 16-17 vacuum at idle.

02-13-2008, 05:49 PM	#24
smelly240 Nissanaholic! Join Date: Oct 2006 Location: Philaburbia Age: 46 Posts: 2,137 Trader Rating: (4) Feedback Score: 4 reviews	i get what dandrifts13 gets - i think anyways - my shits in bar. __________________ HREs on a S13 - check, 6262 - check, Girlfriend.... - nope

02-13-2008, 06:50 PM	#26
smelly240 Nissanaholic! Join Date: Oct 2006 Location: Philaburbia Age: 46 Posts: 2,137 Trader Rating: (4) Feedback Score: 4 reviews	somethin like that its too cold to start that stupid thing up - plus its all unpainted so i dont even wanna look at it. __________________ HREs on a S13 - check, 6262 - check, Girlfriend.... - nope

02-21-2008, 09:15 AM	#28
s13envy Zilvia Junkie Join Date: May 2004 Location: Shelbyville, IN Age: 40 Posts: 407 Trader Rating: (3) Feedback Score: 3 reviews	the info i gave about the cams came from steward engines. The same guys that build heads and blocks for enjuku racing.