Recent Dyno Test and Tune : B20vtec

Around December 20 @ 4:12pm (was hot and uber humid!) we had scheduled a dyno for the following:

B20vtec with the following specs

PR3 head : ported and developed by us, OEM valves *no flat faced ferrea here
                 Supertech HDR springs and retainers
B20b block : 1up pistons (like ycp cast pistons with dome) ARP rod bolts on oem stock rods

Skunk2 Pro 2 camshafts : 0.493"/0.458" Lift (intake/exhaust)   258*/265* dur@0.050" (in/ex)

Intake : ITR intake manifold w/ 68mm cast style throttlebody

Exhaust : SMSP style 4-2-1 long tube tri-Y header w/ 24inch resonator (not open exhaust)

Compression is 11.8:1 (running on 93RON) thats about 89 u.s. octane for our U.S.A  friends UNLEADED!

*a typical street/daily driver set-up we can find universally around the globe hehehe

below are the pictures of the build and last is the dyno run's view :)

a view of the intake ports : the lighting shows the proper contours and shape we have achieved on the port sidewalls, the divider and including the short turn... without totally hogging out the port

a beautiful view of the exhaust ports, streamlined without the need to overly port the sections this lets us maintain excellent port velocity for improved torque at the very least

The reason for the final re dyno was a re work of the ITR intake manifold we have ported it including the plenum section + further re did the work for more improvements and based on previous results

At this angle you can clearly see excellent runner entry shape and the reason for the "rework" was based on previous dyno's we have learned substantial things... i guess that classifies a legit "R&D"
aka research and development LOL :P

a Picture of the header we used (the same design ofcourse this is still new)  foreground is the Bseries header, and on the background (upside down) is a sohc version of our Tri Y 4-2-1

The dyno achieved in Thursday December 202018
noticee the torque/hp improvements between 4,000-5,000rpm justifies the improved runner shape and intake manifold porting = makes for an excellent dailydriver!!

interestingly the curve around the 9,000rpm mark does not show a drastic power drop it seems its still "trying" to carry it onwards, and it reflects not just on the hp but also torque curve, interesting!

we have learned and found out we have sort of maxxed out the ITR plenum size :(
...while the ITR runner shape + added taper via porting was excellent and working well, we feel with better plenum volume (more volume)  we could see significantly more peak power gains...

i guess this is where the Edelbrock PerformerX shines where a VictorX might hurt our midrange...

interesting eh?

so Stay Tuned for more work from us @ SRDmotorsports but we hope you enjoy this update

and Merry Christmas to all!!! cheers!