my disappointing dyno! - Honda Prelude Forum

schwett · 08-15-2001, 09:48 PM

well, it's not all that bad, but it's not what i was hoping for. this is a completely stock 2000 SH with JRSC :

i kinda think this dyno runs low... but who knows. people certainly have gotten good numbers on it. they have an interesting story about a guy dynoing 220 or something on one dyno, and driving right to their dyno and getting 180s. i'm not going to mention any names!

the car feels like it's running better, with different plugs, timing, and fuel pressure. the dyno did not back that "feeling" up though, so i'm going to get some gauges on there and try to tune it a bit. hopefully i'll be in the 210s in a week or two.

Jacques · 08-15-2001, 10:10 PM

Was it running "untuned"?

Wanna Lude too. · 08-15-2001, 10:15 PM

Thats not that bad.You wouldn't be talking about a JRSC Type R coming from Moss Motors itself whould u?

I think your cars just waiting to exhale

I find it weird that so many people are getting such differant results.

schwett · 08-15-2001, 10:26 PM

it was at the stock settings for everything - btc halfway, fuel pressure wherever it starts out, plugs i had put in previously but not specifically for FI, etc. so basically, except for the plugs (bosch +4, plug wires, and rims/tires - none of which would make much difference) that's a completely stock SH with the JR kit installed and nothing else done...

Quote:

Originally posted by jacques
Was it running "untuned"?

schwett · 08-15-2001, 11:41 PM

here's something you might find interesting : the red line is a jackson dyno with just intake, the green line is iranman from preludeonline.com (also just intake) and the blue line is mine (stock). given the similarities of red and green, i would've thought INTAKE would be the answer. however, putting on an intake did NOT help me... at least not yet. the ORANGE line is a 7psi turbo! (my buddy pure lude)

Jacques · 08-16-2001, 12:20 AM

That dyno plot is interesting. I'm wondering why the VTEC spiked much more dramatically with the JRSC plot, compared to your (stock), iranman and pure lude. I thought the JRSC plot would be much more linear?

schwett · 08-16-2001, 12:47 AM

that's a good question. it may be just the dyno itself. in general the jackson plot is a lot spikier. it may have more sampling points or something... if you round it off a bit, it starts to approach iranmans. i'm pretty sure purelude has moved his vtec crossover.

Quote:

Originally posted by jacques
That dyno plot is interesting. I'm wondering why the VTEC spiked much more dramatically with the JRSC plot, compared to your (stock), iranman and pure lude. I thought the JRSC plot would be much more linear?

Pure Lude · 08-16-2001, 03:30 AM

Quote:

Originally posted by schwett
here's something you might find interesting : the red line is a jackson dyno with just intake, the green line is iranman from preludeonline.com (also just intake) and the blue line is mine (stock). given the similarities of red and green, i would've thought INTAKE would be the answer. however, putting on an intake did NOT help me... at least not yet. the ORANGE line is a 7psi turbo! (my buddy pure lude)

is that just a torque comparo?

interesting......sc power.

schwett · 08-16-2001, 09:30 AM

yes, just torque. hp doesn't mean much for a comparison,
since we're looking at torque vs rpm.

Quote:

Originally posted by Pure Lude

is that just a torque comparo?

interesting......sc power.

chomorro · 08-16-2001, 09:38 AM

I used to have my btc at halfway also but Iranman informed me that it can be set lower. Set it at three clicks from the minimum or 6 clicks from the begining you will feel a huge difference. If you worried about pinging mine doesn't ping at all and I am using 91 octane. Just in case by octane booster before doing this. You will love the results.

schwett · 08-16-2001, 10:53 AM

well the odd thing is that after that first dyno, i advanced the timing (maybe four clicks from minimum), upped the fuel pressure a hair, switched to colder plugs, and put on an intake, and my numbers were LOWER! i'm in the middle of trying to sort it all out.

Quote:

Originally posted by chomorro
I used to have my btc at halfway also but Iranman informed me that it can be set lower. Set it at three clicks from the minimum or 6 clicks from the begining you will feel a huge difference. If you worried about pinging mine doesn't ping at all and I am using 91 octane. Just in case by octane booster before doing this. You will love the results.

chomorro · 08-16-2001, 01:16 PM

Maybe its the temperature in your area. What kind of colder plugs did you use? I was told to use NGK BKR-7E. Good luck with the dyno. Even though your numbers are low have you ran with anyone yet?

iranman · 08-21-2001, 11:58 PM

Quote:

Originally posted by schwett

Hahaha...that's freakin amazing! Tim....

Anyway, either clean up on that Iceman install, or can it for a cheap AEM Short ram. Better yet, design some nice 4" intake plumbing throughout.

You may want to try increasing the gap size of your plugs. Mine are at 1mm (0.039in)--yes it's a little on the large side, but I haven't had any problems yet..knock on wood!--and see what it does for you.