EOE

I haven't seen supercharged s2000 cars gain much from meth on this board. Maybe 20hp? Junky can confirm but I was under the impression meth with SC S2Ks didn't gain a huge amount.

Also check your correction in dyno charts. If one is SAE and othere is Standard or vice-versa, numbers gap will be even more drastic, by additional 4%.

What were the Dynos used? On DynoDynamics I made 40HP less than on DynoJet and on DynoPack I showed even more power. I'm sure MustangDyno would've been closer to DynoDynamics since both of those are heart breakers. These are just different readings, doesn't mean your car is slow. Just make sure you compare apples-to-apples, so MustangDyno to MustangDyno, etc

amdaman

Here's the dyno chart, might answer some questions.. I'm not back in the country yet so can't access the map. It looks like the tensioner and pulley setup has done its job as its making linear power to the red line. It's almost tempting to get a 3.8 pulley from ASP and see what 19psi does....

Mike RT4

What EOE said - you absolutely CANNOT compare power figures from different types of dyno.

If you want a more accurate figure of where you are REALLY at, take the car in it's current tune back to the same dyno that you got the 420 figure from on the 1000 charger. At least then you will be comparing apples with apples......

liquid_helix136

Some thoughts;

If your motor mounts are going bad, this can cause a vibration and create phantom knock.
Also, the stock knock threshold tables are going to be too conservative on a supercharged car due to the supercharger making more noise.

Moddiction also only saw about 20whp gains with meth injection, he was around 420whp injecting.

Your torque falls off up top for both graphs, with a centrifugal setup, you should have max boost and Max torque at redline. Either you have belt slip or significantly retarded timing up top.

As others said, you cant compare different dynos like such. How does it feel compared to the other setup? Faster?

amdaman

Here is my last dyno chart on the N1000



I've not driven it yet at I'm still overseas. My mate seems to be very happy with it though. It looks like the same type of dyno but yeah your right, I expect a variation. He said on the tune that the car came in with it made 280kw/295kw on meth. However it was running 1.5psi less boost as I had changed the pulleys so maybe the dyno was off.

I've asked the tuner about the dip and the timing is pulled around 7500 as he was seeing knock. This baffles me as I'm not sure why it would do that.

liquid_helix136

Jeff Evans makes a comment in his timing checklist video about how on these motors, 14-15psi is all you want to run on pump, and that you can get by running more boost, but you'll have to pull timing to keep it safe, effectively negating any gains.

So this may be an example of that.

s2000Junky

^^^ Good stuff. 99% accurate. The only thing he got wrong was the banjo bolt update timeline for the ap1. Being mid 02 - not 03 as he stated.

amdaman

Hmm that's a shame then. I thought the meth would have helped out with this. How are people getting big numbers on 16+ psi without E85 then?

liquid_helix136

Turbos. Lol

Noting how much more load is needed to maintain the same speed, versus without the blower attached, I'm willing to bet the parasitic loss on a supercharger can reach upwards of 50whp at high rpms

s2konroids

Having tuned around 20 S2000's in various guises now over the years, i generally agree with Evans other than the boost level. I'm based in the UK and our good pump gas (99) is equivalent to just over 94 RON US.

I don't agree that 14-15 psi the absolute limit, on our fuel on a turbo around 19/20PSI upto this gains are still to be had. Towards this and after its diminishing returns you'll start to get into single figure digits in timing it depends on setup too for example pushing smaller turbos and superchargers will obviously generate more heat.

In my experience 16psi is really pushing a novi1000 not to say it cant be done but it generates a lot of heat and is generally the limit. I find the meth gain at 50/50 power quite small typically in the range of 10-15BHP tops at high ish boost, the cooling effects are what you should run meth for with a small performance bump.

Dyno setup and correction factors can make a big difference, as long it not knocking and no issues i wouldn't worry about the figures too much they don't seem be indicative of something wrong.