Well as it states i got my car on the dyno today. A little dissapointed in the results but it is about what i was expecting. It put down 296 RWHP and 204 tq at 12psi. I have a mild streetport, FMIC, Twinpower ignition, PFC, Boost controller, Full exhaust and k&n intake system. Other mild mods but that is the majority. Im heading to the track this sunday so i will see what i can do there. Are these pretty normal results? it seems like it should make a little more to me...

 

what kind of dyno? air temps? lots of factors. afrs? ignition timing?

 

Compression can play a part as well.

I put down 304whp at 13psi. But the truth is that the boost wouldn't hold until red line. So the 304 was achieved at 7k rpm and probably 12psi. That was also with compression results of all 90s. 3mm seals may of contributed to lower compression readings however.

As far as the track, if it is a road course, that power level is more than adequate. Or are you going to the strip?

 

That seems more then acceptable for power for stock twins lol (im assuming based of lack of mention of turbo). Why are you disappointed?

thewird

 

No really that seems very low considering that the motor is ported, I dyno at 299 RWHP and FTTQ 258, with 10 lbs of boost and the motor is stock and beside that just the base map of the power fc.
My mods are: 3 inch downpipe, hi-flow cat, RB catback, intake, large SMIC, BNR stage 3 non -seg, Hks twin power, spark plugs are 9 all around, still have the a.c and air pump on it.

Khris

 

torque is on the low side... from other dyno's i've seen with similar setups. should be closer to around 230-240tq.

204tq is more of a stock number.

in my experience through others, its a tuning issue.

good numbers nonetheless

 

definatly low i pulled 291 non senq. twins stock motor intake DP MP and CB with stock ECU!

 

I would like to chime in and say that the type of dyno used to find horsepower figures can make a HUGE difference (as much as 15-18%).

It's the main reason I'm perfectly happy having *only* 325wrhp as measured by a Dyno-Dynamics dyno @16-17psi (with 8.6-9.0 compression on all faces).

 

before going single, i put down 291rwhp and 338Nm, at 11 psi with base map of the PFC..

my mods were, 3" exhaust, DP, MP, FMIC, and K&N intake, motor was stock.

 

Torque does seem very low. I'm getting 298hp 261tq peak at 12psi with stock ports, 99 twins (effectively stock), M2 med IC, DP+MP w/ RB catback. This was on a Dynojet, PFC tuned very conservatively by Ray Wilson. Do you have the plot?

 

i put down 334 on the dyno with stock twins, stock ports, full exhaust, PFC, at 14/15psi.

This was on a dynapack so it was even on the low side. it comes out to 15% lower.

 

What was your afr?

 

Dynopacks actually read higher then dynojets.

thewird

 

Not true I dynoed before with my previous tune. at 301, on the dynapack. On the DynoJet i dynoed 329 i believe.



Afr's were at 11-12

 

Try testing it again using various dynojets and dynopacks . You'll be surprised at the differences even between the same machines.

thewird

 

Im not made of money lol. I will have to check it out.

 

Im still not convinced streetporting makes much of a difference on teh stock twins especially at that boost level and if they are still sequential. The stock motor is plenty adequate for anything the stock twins can throw at it. Im not claiming porting doesnt make a differenec on the stock twins but it isnt going to show a 30-40rwhp difference. If you want to go faster,get more fuel and turn the boost up. I think the numbers look pretty spot on. So many variables, but 300rwhp at 12lbs on the stock sequential twins isnt anything out of the norm.

 

For that hp level, the torque seems low. I would believe mid 200's ft-lb for peak torque but not low 200s. I bet you probably made around 200 ft-lb at peak hp (7600 or so rpm?). Post the dyno graph that would help make some sense out of this. Also make sure that the scales are being measured properly (torque in ft-lb, hp in ft-lb/sec). If the scales are right the graphs should cross @ 5252 rpm, as most of us are used to looking at here in the states

 

alright well i will try to get the graph on here in a little while. But my torque was really really flat the whole way. heres the stats 81 degrees F 29.01 in-hg 25% humidity and my afrs got down to 10:1 from about 5500-7500 then got up to about 11:1 untill redline. my boost would not boost any more... i had it set with my profec to about 16psi on the freeway but on the dyno it would only do 12 but it held the boost to redline. I tried to turn it up a little more but it wouldnt go... then i got on the freeway after the run and it was boosting like 17psi. I have no idea why.... maybe not enough air flow when it wasnt moving? too much load from the dyno? and Im hitting the dragstrip this weekend and i am going to try to hit up some auto X events soon too.

 

i'm assuming you have upgraded your fuel setup? 16-17 psi is too much for your stock twins.

 

if someone pms me their email address i can email it to them... i dont know how to size it down.

 

thewird [(-at-)] yahoo.com ill resize for yah. What boost does your commander say when your doing 16-17 PSi. I suspect incorrect readings

thewird

 

I've seen a torque curve like that before with dynojet. I'm not sure what causes it. If those AFR's and boost values are correct, you could make more power running high 11's and still be safe.





thewird

 

edit, i just realized I made an error.

 

nice one