Spool, Low End CHATTER thread [Archive]

zeroyon

31-01-2007, 08:05 AM

Thread to talk about the spool postings.

Here is a couple of interesting comparo graphs I made.

Sus them out.

Will make some more with more engines when i can be bothered.

MrMayhem

31-01-2007, 08:13 AM

SR lil HKS 2530 fat drivability your Garrett 3540 ****ting on the disco spud surprises most people. Disco spuds trendiness over rated spool time vs power payback

RB20
I went from happy spooler Autech T28 to the HKS 2535 and long runnered manifold, gained 40rwhp and made a laggy snotter. I think a good compromise would be a HKS 2530
Tuyens got a good combo power to lag compromise, you're not allowed to bitch about lag anymore

zeroyon

31-01-2007, 08:17 AM

Be Great to make a rb26 one. Post some of your graphs up fooooools !!!

tuyen

31-01-2007, 08:27 AM

true, i never relised how much lag u guys have!

b005t post ur power up, as your car feels pretty damn fast at low rpm :P

Lonewolf

31-01-2007, 08:28 AM

low that low end rb20 power :D
would post up my sr20 graph but its in km/hr not rpm

Joe

31-01-2007, 08:35 AM

Hahah, smash my EJ205 graph in there just for a comparison :)

Here are my DD graphs, same mods but with an IHI VF22 vs FP TD06

http://i9.tinypic.com/2ag9k02.jpg

The TD06 makes more power, comes on harder after around 4000rpm, and at the same time its running less boost!

zeroyon

31-01-2007, 08:36 AM

Yer Speed dyno graphs FTL .....

Tuyen your red tops kicking ass for a little 2 litre !!

zeroyon

31-01-2007, 08:47 AM

Ok Added the rest in the Random Jpeg. With some SR / RB samples too.

FORCED Cubes FTW in the down low rpm !!

Joe

31-01-2007, 08:48 AM

Gee mines laggy until it comes on, compared to the Nissan motors! Once it comes on though, graph jumps very hard.

Typical EJ20 though....long runner manifold, long IC pipes for the lose, but once they come on boost, they ramp up extremely hard.

MrMayhem

31-01-2007, 08:53 AM

lonewolf what dyno get em to bring the run up and plot teh 4 points

This is the most interesting thread in al for years, but means getting you wang out for the measuring stick

Joe

31-01-2007, 08:57 AM

GREAT thread for sure!

Any ideas as to how diff ratios would affect spool? I'd say shorter ratios would mean that boost doesnt come on as hard or early, because it cant "load up" like taller ratios would allow.

zeroyon

31-01-2007, 09:02 AM

You can't really measure the true driving lag on the dyno as the diff ratio and vehicle weight affect the true feeling.

lag is also a measure of time which is not on the dyno graphs we get.

For example my 2535 rb20 makes more then steves rb20 2535 down low.
But his is in a lighter(ish) r31 where as mines in a heavy gts-4. So the true driving lag might be around the same ... mine could be worse even !!

Silencio

31-01-2007, 09:50 AM

http://i19.photobucket.com/albums/b169/Rads13/304.jpg

LLAAGGGGGG

Joe

31-01-2007, 10:48 AM

Fwoah Rad, it got up to 7397rpm? :D

RB20ZED

31-01-2007, 11:35 AM

i must admit the s2 25 snail on a 20 is awsome compramise for power and spool times zed always had power anywhere and never really stopped pulling till about 6500 where the boost would just taper off must admit zed was running about 16-17psi for 2 years or so hahahaha never lost a wheel. Nice midrange thought good for sliding around ect :>

Lonewolf

31-01-2007, 04:54 PM

lonewolf what dyno get em to bring the run up and plot teh 4 points

This is the most interesting thread in al for years, but means getting you wang out for the measuring stick

Had runs done at hyperdrive, cant be assed going there to hassle them for another graph.
If someone works out a gear ratio formulation for speed on an s13 gearbox in 4th gear then i shall :P

MrMayhem

01-02-2007, 04:23 PM

Posted up Dirk from AGI's VQ30det std engien with a tune and a turbo back

Jazza

02-02-2007, 07:52 AM

That datto sr20 is so impressive, its responsive and makes 400+...

Oggie

02-02-2007, 11:41 AM

Had runs done at hyperdrive, cant be assed going there to hassle them for another graph.
If someone works out a gear ratio formulation for speed on an s13 gearbox in 4th gear then i shall :P

As 4th gear is 1:1, what rpm you are doing at what speed is purely dependent on your diff ratio. If you are using the standard(?) RPS13 180SX diff ratio of 4.083, you will be going 28.95 Km/h for every 1000 RPM. Therefore:

2000 RPM=57.95km/h
3000 RPM=86.85km/h
4000 RPM=115.8 km/h
5000 RPM=144.75 km/h
6000 RPM=173.7 km/h
7000 RPM=202.65 km/h

If the diff ratio I have used isn't correct, download my GEARCALC program (http://www.locost7.info/gearcalc.php) (it's free) and plug in your real ratio. It makes it relatively easy to work out these things.

EDIT: forgot to say that this is also assuming the standard tyre diameter of 627mm (205/60x15)

zeroyon

02-02-2007, 11:43 AM

Added a RB20 vs SR20 with a VQ kicker ;)

Oggie i'll sms you in a sec :)

Oggie

02-02-2007, 11:51 AM

Here is a screen capture of Gearcalc showing the info for my stock 180SX:

Fryman

05-02-2007, 08:06 PM

finally

http://www.charitymods.org/pics/powerrun!.JPG

Out of injectors, and their settings are all wrong. But we tuned to it anyway.

Waiting on the hks 1000cc for primaries and "indy blue" 1600cc.. then its time to push the button

MrMayhem

18-02-2007, 10:19 PM

Sus the leanear delivery of the vq, want to see turner's crapper when he gets it on a dyno that is calibrated to rpm.
Need more submissions for comparos, I think the real world measuring stick intimidates the weak

19-02-2007, 10:51 AM

Definitely - one of the best threads going !

MrMayhem

19-02-2007, 07:52 PM