Full-Race Twin Scroll 3071 - Dyno Dynamics Dyno [Archive] - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

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juggernaut1

03-12-2009, 01:26 AM

I don't normally post on this forum but thought I would post up some dyno numbers for my 3071 full-race twin scroll setup

The first two dyno runs were done in 4th gear in my car which is not a 1 to 1 ratio (I'm running a close ratio Nismo 6 speed box)

The second of those two dyno's you will see overlayed over another dyno (thick black lines). This compares my twin scroll (thin lines) with a single scroll 3071 on a 6Boost mani with stock intake (thick lines).

As you will see I'm making 20 psi by around 3600 to 3700 rpm and around 22.5 psi by 3800 rpm - insane considering this was not done in 5th gear (1:1 drive ratio). It is also remakable given that I am running a 4 litre Hypertune plenum.

The second two dynos were done in 5th gear (1:1 drive ratio). Interesting how the gear ratios affect torque and hp?

You will note that my boost is falling away in the higher rpm as I need to sort out the boost controller so that it will hold boost.

If I can get it to hold boost I think I will be able to maintain max torque to the redline resulting in even more hp and will probably push over 400 on a dyno dynamics which is not too shabby for the 3071 compressor.

Played around with VCT and is on at 1500 rpm and off at 7000 rpm.

Played around with ex cam settings and ended up retarding the ex cam a few degree. We lost about 10 hp at peak but gained 15 at peak through the midrange. Overall retarding the cam resulted in more area under the curve even tho it was at the expennse of peak hp. It also spooled the turbo 150 to 200 rpm earlier

As you can see the temps in Perth (Australia) were 37 degrees C but it still cranked out some reasonable numbers.

I took it for a drive a few nights ago in the cooler (but still warm) conditions and this car hauls ass. It actually doesn't feel like a turbo car it feels like a big cube V8 under the bonnet. By 4000 rpm it is hauling ass all the way to the 8000 rpm cut out. I can't wait to fix up the boost issues and take it for a drive in cooler conditions.

AFR's are between 11.5 and 11.8

Background info is on this previous thread.

http://www.freshalloy.com/forums/showthread.php?t=189584

Nice to see Full-Race is using my engine bay pics on their website.

Whilst there is still some work to do to fix up my boost control issues which IMO will also tidy up the curve, the way the car currently performs has exceeded my expectations.

http://i241.photobucket.com/albums/ff132/juggernaut000/Dyno1-1.jpg

http://i241.photobucket.com/albums/ff132/juggernaut000/Dyno2.jpg

http://i241.photobucket.com/albums/ff132/juggernaut000/Dyno3.jpg

http://i241.photobucket.com/albums/ff132/juggernaut000/Dyno4.jpg

Om1kron

03-12-2009, 03:15 AM

you Australians have some awesome cars... you're like 1 of 2.

s15specR

03-12-2009, 08:23 AM

These are mines on a
S15 SR
Tomei 260/260
GT2871R
Tomei Manifold
Tomei Standalone with Base Tune from Tomei

These are on a Dyno Dynamics Dyno as well, we played around with the MAP and got it to 351whp, then started running ho so stopped.

http://i267.photobucket.com/albums/ii319/tripleJs15/Car/dyno_psi.jpg
http://i267.photobucket.com/albums/ii319/tripleJs15/Car/dyno_afr.jpg

slider2828

03-12-2009, 09:39 AM

What is up with your guys torque numbers??

Same Dyno GT2871R Stock Intake Manifold Stock Exhaust Manifold 16.5 PSI with HKS Step 1 264
PowerFC tuned by SteveShadows of Course... I think 4th gear pull...

Its conservative because I run on the track and the conditions are going to change, so I asked for a more conservative tune.... California piss gas 91....

http://i28.photobucket.com/albums/c242/gaert/PICT0072.jpg

drifter_for_life06

03-12-2009, 10:10 AM

What is up with your guys torque numbers??

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its probably not in ft/lbs

s15specR

03-12-2009, 10:17 AM

Thats pretty good slider, steve is the guy

Zerolift Autolab

03-12-2009, 10:20 AM

Here is a S14 we did with a:

Peak Boost Turbo Manifold
GT3071R .63 - 4" intake mouth
44mm WG - Open Dump
Top Speed Intake Manifold w/ Stock Throttle Body
HKS Fuel Rail
Siemens Injectors - Run @ base pressure
AEM EMS
Stock Transmission
Exedy Hypersingle

http://i251.photobucket.com/albums/gg308/Zerolift-Auto/S14%20Zenki%20Build%20Up/RobertDyno-1.jpg

404.50 rwhp 310.20 tq @ 14 psi
459.45 rwhp 381.25 tq @ 20 psi

s15specR

03-12-2009, 10:31 AM

So take what 9 or 10 % off those DynoJet numbers and you have the DynoDynamics Numbers

slider2828

03-12-2009, 10:41 AM

So take what 9 or 10 % off those DynoJet numbers and you have the DynoDynamics Numbers

15% off all the numbers.... actually... but its not like its straight line you know what I mean... There is just no comparison....

HP is nothing tq earliest is possible is everything.... (My New T-Shirt line)....

Sucks that American cars would woop use on TQ numbers hahaha

slider2828

03-12-2009, 10:42 AM

its probably not in ft/lbs

Yah I wonder what measurements they use for tq in aussieland.... I just checked he is using SAE numbers cause his dimensions are in HP.... therefore TQ would be in lb/ft... Otherwise it would be measured in kW..

s15specR

03-12-2009, 12:23 PM

I wonder if the intake manifold is killing his torque, Steve said to keep the stock mani with a bigger throttle body for best torque.

And slider is right HP is nothing Torque actually moves the car.

godsmack

03-12-2009, 12:33 PM

Ya usually the aftermarket intake mani's lower torque alittle but give more horsepower. Now torque vs. horsepower is in the eye of the beholder. Some ppl like having more low end torque over high end hp. and some ppl just the other way around. Hp. = speed TQ = quickness

slider2828

03-12-2009, 12:45 PM

All true... I wonder if it IS his manifold, cause those are good numbers.... But he is running a HUGE plenum either exhaust or intake, but looks like the exhaust plenum cause of the weak low end...

godsmack

03-12-2009, 12:56 PM

better flowing exhaust would spin turbo faster. i'm no pro but i'd say the intake is hurting him in the low range but helping with the peak power.

slider2828

03-12-2009, 01:15 PM

It could be intake, it could be exhaust. If exhaust mani is equal length and its huge, it could also slow boost down it does not speed it up that is why tomei modeled the stock ex mani. Bigger intake will also reduce low end, but great gains on high end.

s15specR

03-12-2009, 01:31 PM

The tomei manifold I had was great, response was sick onna gt2871r

slider2828

03-12-2009, 01:45 PM

The tomei manifold I had was great, response was sick onna gt2871r

What you have now?

I have regular old stock cast manifold FTFW cause can't afford to crack on the track......

which 2871r you have .86? Also GT frame or 3" inlet frame?

s15specR

03-12-2009, 01:59 PM

I had it, just sold it last week onday I think ? on this forum, along with the turbo and I got the tomei turbo outlet left to sell.

It's worked great, I'm thinking about doing what Steve said and get a bigger throttle body with stock manifold and see how it goes.

slider2828

03-12-2009, 02:10 PM

What turbo manifold are you going with now and turbo?

The only other one is the SR20VE N15 one right? then 70mm one?

bloodangels13

03-12-2009, 02:13 PM

very nice Juggernaut1.. post some pics of the car with engine bay shots pls!

juggernaut1

03-12-2009, 05:04 PM

Hi guys

The torque is in "tractive effort". Which i know is a useless measurement especially for comparisons to your dynos. If it were up to me I like good old fashioned ft/lbs and hp.

There's no doubt the intake is not ideal for lower end torque. However, having driven the car any more torque would actually be useless due to wheel spin. I'd be off the throttle whilst the car regains traction and then back on it again and the trade off would be less top end.

If its a street car I say keep the stock intake and if its going to see some track days then an after market manifold may be a better suited to the match to the rev range. My car will see some track days and this has influenced my decision on the parts used.

This car is extremely tractible, has a great rev range and is able to apply the power to the ground most of the time - just what I wanted.

Pics as requested:

http://i241.photobucket.com/albums/ff132/juggernaut000/SR20Build010.jpg

http://i241.photobucket.com/albums/ff132/juggernaut000/SR20Build007.jpg

http://i241.photobucket.com/albums/ff132/juggernaut000/SR20Build011.jpg

http://i241.photobucket.com/albums/ff132/juggernaut000/SR20Build012.jpg

slider2828

03-12-2009, 05:46 PM

What the heck is tractive effort... it doesn't even sound like a measurement... .LOL....

is it something comparative or does it have a unit of measure hahaha..... Anyways, good job, love the car....

Yah I drive my car on the street too, so I need to low end torque. I like a TQ curve which is on early so I don't have to rev the heck out of the car to get it going on tight tracks..... I guess depends on track right? Phillip Island is really open so your car would rock.... One of the tracks I wanna race or ride one.... Be like Mike Doohan!!! WOoooo

juggernaut1

03-12-2009, 05:52 PM

Haha....I have no technical idea what "tractive effort" is either?

Phillip Island is a very fast track (highest average speed track in Australia) - unfortunately I live on the other side of the country.

The Nismo close ratio 6 speed box stacks the gears nice and close so the car is always on the boil.

juggernaut1

03-13-2009, 07:39 PM

Slider,

I just compared your dyno with my 360 hp dyno - because it is in rpm.

For the purpose of the exercise I note that I am making more power than you at any rpm i.e.

rpm you me
3200 80 100
4000 150 180
4800 260 270
5600 300 320
6400 320 350
7200 est 300 360

Now in theory if I'm making more power for a given rpm then I'm also making more torque i.e. Torque = 5252 x hp / rpm.

Just a way of comparing dynos to overcome the useless "tractive effort" measurement in mine.

ross.cottrill

03-13-2009, 08:07 PM

that comparison is awsome!!!whats that about the t-3 turbos having too much lag LOL!!!

S13 curtis

03-14-2009, 09:23 PM

Nice. sick dyno's

S13 curtis

03-14-2009, 09:27 PM

slider2828

03-14-2009, 09:31 PM

holy shit.
you could rape people at 14 pounds. lol
nice numbers.

BTW what is the entire set up and what cams were you using?

That is one a dynojet.... So read up what are the differences....

slider2828

03-14-2009, 09:32 PM

juggernaut1

03-14-2009, 09:38 PM

Agreed the 2871 is a great turbo.

slider2828

03-14-2009, 10:00 PM

Also I have stock intake and exhaust manifold.... just plain stock and maybe cleaned it with a wire brush and sandpaper hahaha by hand..... LOl

But I just shortened my hot pipe it should ave a little better response now.

-Ken

juggernaut1

03-14-2009, 10:11 PM

This was "going" to be my setup until I changed to the full-race twin scroll setup. Anyway its a 2871R topmounted with a Tial ex housing on a custom 6Boost manifold. I was going to run this with my extrude honed intake manifold. The exhaust manifold has also been extrude honed as well as the compressor cover on the turbo. I never finished the project before the change of heart - but I still have all the gear.

http://i241.photobucket.com/albums/ff132/juggernaut000/Turbo008.jpg

http://i241.photobucket.com/albums/ff132/juggernaut000/Turbo006.jpg

http://i241.photobucket.com/albums/ff132/juggernaut000/Turbo001.jpg

http://i241.photobucket.com/albums/ff132/juggernaut000/ExhaustManifold005.jpg