Some of you will know that I recently had problems with my top end, this is the sheet I got from the rolling road, is 190 a lot if torque or not? I need advice on tuning the, I've got my top end back now on my car but I can;t see what the max power is til I go back to the rolling road in about 2 weeks. Power to the wheels seem way down

http://www.we-todd-did-racing....DE%3D


My setup is:

Spoon Header
2.5 inch de-cat system
Pipercross Viper Induction kit
Sun Ground Wires
Champion Eon Plugs
Uprated HT Leads

 

was that printed or drawn by hand with connectind dots? what kind of dyno is that?

 

He he! well to be honest it's from a machine connected to a rolling road, I know it's not smooth like the dyno charts. Not really sure why it looks like that. I think he takes readings from specific points in the rev range cos I saw him pressing buttons on a control box of some kind.

Do you guys call these rollers?? I mean the Dynos are the boxes where they connect to the hubs of your car so you have to take hte wheel off right? This is the giant roller thing.

 

you said he pressed button to measure signal at certain rpm. maybe thats why it looks so odd, - only 8 points on the graph. it seems to be dropping way too much on the graph.. see if you can find a better dyno place..

 

it's not that, I had probs with the car where O can;t get past 7000k, it;s ok now though but needs tuning

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Black Sheep &raquo;</TD></TR><TR><TD CLASS="quote">Some of you will know that I recently had problems with my top end, this is the sheet I got from the rolling road, is 190 a lot if torque or not? I need advice on tuning the, I've got my top end back now on my car but I can;t see what the max power is til I go back to the rolling road in about 2 weeks. Power to the wheels seem way down
</TD></TR></TABLE>

Well, for starters, you're reading the graph incorrectly. HP is the blue line and torque is the red one, not the other way around. I can honestly say I've never seen a graph like that, but I don't think it represents the same curve that other dynos we're used to seeing produce. To me, it actually looks like a multi-gear run, rather than a 3rd or 4th gear pull. You can see the power drop off and start to climb again at what roughly appears to be the 2-3 and 3-4 shift points. Either way, the peak HP and torque figures in what I assume was third gear look reasonable for the modifications you listed.

 

Padawan, I have to dissagree. You can see to the left of the graph, lb ft is in blue, and on the right BHP is in red. The torque curve is just about 65 ft lbs above what we are used to seeing from a dynojet chart. 100 hp is where it should be, around 4700 rpms, but after that it doesn't shoot up like it should when vtec hits. Probably needs more tuning.

Edit: what is a "Pipercross Viper Induction kit"?

 

The car starts the run in 4th gear, I was in the car with him at the time

Pipercross?? It's a UK thing, take a look http://www.performanceairfilters.com/main.html

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Dr Pooface &raquo;</TD></TR><TR><TD CLASS="quote">Padawan, I have to dissagree. You can see to the left of the graph, lb ft is in blue, and on the right BHP is in red.</TD></TR></TABLE>

Actually Dylan, now that I've looked at it again, you're right. I was following the legend at the top where blue=P (power) and red=T (torque), but now it looks like green=P, so I really don't understand what is happening in the chart.

The point labels do indeed seem to indicate that the car is making 144 HP and 190 ft-lbs. of torque, so something is very obviously amiss. Without more experience with such a dyno and more information about the run, I couldn't even guess just what the problem is though.