My B20VTEC dyno

**iamhappy46** · 12-09-2006 10:11 AM

Originally Posted by fatboyz39

was making peak power around 8000-8200

Well that means you would have had about 207Nm@crankshaft(about 160Nm@wheels) and yes, I realise that your setup was different

Just needed it for a comparison.

Therefore, if master_bo_bo arranges to have the camshaft timing adjusted for peak power at higher rpm(over 8000rpm), with the same amount of hi-rpm torque it will go over the 130Kw@wheels mark easily. It is then a case of adjusting the low rpm fuel and ignition curves for the best driveability.

**iamhappy46** · 12-09-2006 10:15 AM

Todaek9: I believe it is the stock TB and intake manifold. However, that would not be causing the low rpm hesitation. If it was to be a problem, it would be restricting hi-rpm air flow.

**todaek9** · 12-09-2006 01:12 PM

but may i know how Hi RPM should a B20 get??..from what i know, it is ard 8500 Peak, Vtec point around 4,800 - 5,200rpm. Anything over 8500rpm peak should have some reliability issue...but i guess it all depends on the owner.

**koldfire** · 12-09-2006 02:00 PM

i wonder if stock TB (60mm ??) and intake manifold (P30 ??) too restrictive at high rpm. Would be interesting to know the cost/performance ratio if he does these upgrades.

**Professional** · 12-09-2006 02:05 PM

Better to do more research. No best tuner in forum.

**DynoDave** · 12-09-2006 04:56 PM

Guys while it is this LEAN you are all taking guess's as to the flat spot and lack of high RPM power just wait till its retuned with the correct AFR's then we will see the difference in power and drivabilty.
Regards Dyno Dave

**master_bo_bo** · 13-09-2006 09:40 PM

Hey Guys

Took the car back in for a retune today and here are the dyno sheets....I made 119.2kw but this dyno was done on 4th gear instead of 3rd like the previous dyno...Ive included a torque graph as well...any inputs are much appreciated

**SKREMN** · 13-09-2006 09:44 PM

so you made pretty much the same power
is that flat spot gone?
does it feel better? more ressponsive?

**master_bo_bo** · 13-09-2006 09:50 PM

The flat spot is still there...but the tuner reckons its caused by the efficiency of the cams and other combination of parts im using in my car...so i dunno..but the car feels somewhat a lil smoother i guess..havent really had a long drive to really notice the difference yet...

**SKREMN** · 13-09-2006 09:54 PM

are you planning to do more mods like manifold and tb or bigger cams later on?

**master_bo_bo** · 13-09-2006 10:14 PM

yeah maybe...later on...im planning on Toda B or Buddyclub Spec 3+ something along those line..i want a cam thats good for mid range power but also decent up top...seeing b20 produce most of their power much earlier...n maybe ITR IM and TB or skunk2..i dunno yet..just work with wat i have atm i guess