SuperOwen wrote:How close in diameter were the tyres between both sets of runs and what gear was each done in?
the street tyres used on thursday were 24" diameter on 5.5" rims , whilst the tyres used on friday were M&H DOT tyres 26" diameter on a 5.5" BRM , but had a much wider foot on the rollers for better grip . If there was going to be a change of figures due to gearing / tyre size , then it should have gone down , just as the torque figues showed .
On thursday with the smaller tyres the torque was 1500lbs tractive effort and on friday it came down to 1455lbs with the larger diameter tyres , however with the added grip we were able to get a true power run with greater horsepower shown .
All runs made in 4th gear only ....... both days !!
Team
FASTEST ET @ WARWICK 2010 & 2011
FASTEST SPEED @ WARWICK 2011
FASTEST ET & SPEED WSID 2012
PB - 6.33@113.07(1/8) & 9.88@135(1/4)
Should make it quite an exciting drive 👍
matberry wrote:Wow, gotta be happy with that, even broken.
Tests I've seen, tyre diameter and gear ratios will not effect dyno figures.
It has a direct effect on tractive effort figures. Dyno setups vary too much to compare but it's still interesting to see what results are produced anyway.
After the last couple of weeks of early mornings to go to work then late nights at the workshop, i was both excited and very dissapointed about dyno session. Big thanks to Wayne, ben and dean for their help. I guess we found the limits of a non flanged crank ...lol... oh well we will strip it down , put it back together with new parts and be on the track again ready for the next event.
Winner best engineered vehicle 2011 @ Warwick & 2012 sydney
1/8 6.71 @ 100.9 mph Warwick 2011
1/4 10.17 @ 137 mph WSID
SuperOwen wrote:matberry wrote:Wow, gotta be happy with that, even broken.
Tests I've seen, tyre diameter and gear ratios will not effect dyno figures.
It has a direct effect on tractive effort figures. Dyno setups vary too much to compare but it's still interesting to see what results are produced anyway.
That may be so, I should have said, 'hp figures do not change'. Back-to-back dyno runs in 3rd or top gears provided the exact same hp plot whenever I've asked for a comparison.
Matt Berry Motorsports...air cooled advice, repairs and mods Ph 0408 704 662
OFF-ROAD,CIRCUIT,DRAG,STREET,ENDURANCE
Yeah it depends on the dyno brand, they all have their own particular compensation factors etc programmed in.
the engine is removed from Chris' bug and the flwheel is removed for inspection . Not pretty !! but just as we suspected , the flywheel dowels have all sheared off and the washer for the flywheel bolt has welded itself to the flywheel
Team
FASTEST ET @ WARWICK 2010 & 2011
FASTEST SPEED @ WARWICK 2011
FASTEST ET & SPEED WSID 2012
PB - 6.33@113.07(1/8) & 9.88@135(1/4)
new bugpack 84mm flanged crank will be used in Chris' engine . The crank has type-1 mains with type-4 centre main . Bugpack main bearing set is purchased to suit the new engine case . The 5.5" chevy journal H-beam rods are thoroughly checked and rod bolts are replaced
Team
FASTEST ET @ WARWICK 2010 & 2011
FASTEST SPEED @ WARWICK 2011
FASTEST ET & SPEED WSID 2012
PB - 6.33@113.07(1/8) & 9.88@135(1/4)
the new CB alloy hi-top engine case has been machined for the flanged crank seal . The crank is installed into the case to check clearances . The raceware 10mm headstud kit has arrived also
Team
FASTEST ET @ WARWICK 2010 & 2011
FASTEST SPEED @ WARWICK 2011
FASTEST ET & SPEED WSID 2012
PB - 6.33@113.07(1/8) & 9.88@135(1/4)
the rods are fitted to the crank and the engine assembly starts
Team
FASTEST ET @ WARWICK 2010 & 2011
FASTEST SPEED @ WARWICK 2011
FASTEST ET & SPEED WSID 2012
PB - 6.33@113.07(1/8) & 9.88@135(1/4)
the raceware headstuds are installed . The new Pauter 94mm cylinders have arrived for Chris' engine , they are installed to check clearances & deck-height and found to be perfect in every way
Team
FASTEST ET @ WARWICK 2010 & 2011
FASTEST SPEED @ WARWICK 2011
FASTEST ET & SPEED WSID 2012
PB - 6.33@113.07(1/8) & 9.88@135(1/4)
Chris' heads are remachined to ensure a perfect seal and the cylinders are painted to protect them from rusting
Team
FASTEST ET @ WARWICK 2010 & 2011
FASTEST SPEED @ WARWICK 2011
FASTEST ET & SPEED WSID 2012
PB - 6.33@113.07(1/8) & 9.88@135(1/4)
I have assembled the pistons & cylinders for Chris' engine . I have also assembled the cylinder heads & CC'd the chambers again to calculate the compression ratio .
I purchased 2 sets of CB Performance 94mm barrel shims today & was horrified to see the variation in the 0.060" shim sets .... always worth checking yourself me thinks
I am assembling Chris' engine tonight ....
Team
FASTEST ET @ WARWICK 2010 & 2011
FASTEST SPEED @ WARWICK 2011
FASTEST ET & SPEED WSID 2012
PB - 6.33@113.07(1/8) & 9.88@135(1/4)
Nice work Wayne....
well I got Chris' engine assembled last night & after sorting the issue with the barrel shims , it all went together really well .
Team
FASTEST ET @ WARWICK 2010 & 2011
FASTEST SPEED @ WARWICK 2011
FASTEST ET & SPEED WSID 2012
PB - 6.33@113.07(1/8) & 9.88@135(1/4)
today the turbo header & the new turbo was installed onto Chris' engine . The new turbo is much larger that his old one . This turbo has a 4" inlet & a 2.5" outlet on the compressor housing
We will now use a 750dp methanol Holley on Chris' engine rather than the 45dcoe sidedraught weber
Team
FASTEST ET @ WARWICK 2010 & 2011
FASTEST SPEED @ WARWICK 2011
FASTEST ET & SPEED WSID 2012
PB - 6.33@113.07(1/8) & 9.88@135(1/4)
tonight we made some modifications to Chris' intake manifold to suit the 2.5" outlet on the turbo compressor housing . We also fabricated a mount for the installation of a Turbosmart wastegate into the turbo header
Team
FASTEST ET @ WARWICK 2010 & 2011
FASTEST SPEED @ WARWICK 2011
FASTEST ET & SPEED WSID 2012
PB - 6.33@113.07(1/8) & 9.88@135(1/4)
the Turbosmart wastegate is installed and the intake manifold extented to meet the turbo
Team
FASTEST ET @ WARWICK 2010 & 2011
FASTEST SPEED @ WARWICK 2011
FASTEST ET & SPEED WSID 2012
PB - 6.33@113.07(1/8) & 9.88@135(1/4)
last night Chris fabricated the support brackets for the Holley manifold . He also sorted & connected the turbo oil feed & drain
Team
FASTEST ET @ WARWICK 2010 & 2011
FASTEST SPEED @ WARWICK 2011
FASTEST ET & SPEED WSID 2012
PB - 6.33@113.07(1/8) & 9.88@135(1/4)
last night was transmission night at WPVW . Chris removed his transmission so that I could install his new 4th gear set . After many passes over the past 4 years the 3.44 ring & pinion still look great .
The new 4th gear set in 1.19 ratio will allow chris to increase his top-end speed with the added power that we have got from his engine with the bigger heads & manifolds .
Chris previously ran 127mph and we are expecting him now to run close to 140mph
Team
FASTEST ET @ WARWICK 2010 & 2011
FASTEST SPEED @ WARWICK 2011
FASTEST ET & SPEED WSID 2012
PB - 6.33@113.07(1/8) & 9.88@135(1/4)
the 4th gear ratio in Chris' transmission is changed from 1.30 to 1.19
Team
FASTEST ET @ WARWICK 2010 & 2011
FASTEST SPEED @ WARWICK 2011
FASTEST ET & SPEED WSID 2012
PB - 6.33@113.07(1/8) & 9.88@135(1/4)
Great to see the updates Wayne and Chris.
Those thrust faces on the 1.30 are a bit burnt.
I like to use a 091 circlip against the hub
to stop it thrusting forward against 4th.
I just machine a small step in the face of the 3rd/4th hub
so it Juuuust fits in,
and then the hub can not move, and the set end float is there all the time.
westi wrote:That's mad Alan.
tonight I completed the reassembly of Chris' transmission , assembled the axles & brakes , then Chris installed his transmission while I bolted onto his engine the flanged flywheel & clutch assembly .
Chris is reusing his Kennedy stage-3 (2600lb) pressure plate with a new 4-puc cinter-iron disc
Team
FASTEST ET @ WARWICK 2010 & 2011
FASTEST SPEED @ WARWICK 2011
FASTEST ET & SPEED WSID 2012
PB - 6.33@113.07(1/8) & 9.88@135(1/4)
we go to install Chris' new engine & find that the Holley manifold is hitting the body .
A quick body modification & all is good
Team
FASTEST ET @ WARWICK 2010 & 2011
FASTEST SPEED @ WARWICK 2011
FASTEST ET & SPEED WSID 2012
PB - 6.33@113.07(1/8) & 9.88@135(1/4)
Chris' engine is installed , the 750dp Holley carb is fitted and everything clears the body now
Team
FASTEST ET @ WARWICK 2010 & 2011
FASTEST SPEED @ WARWICK 2011
FASTEST ET & SPEED WSID 2012
PB - 6.33@113.07(1/8) & 9.88@135(1/4)
Wow!!!👍
Chris assembles his bug back together , installs the rear wing & cuts the hole for the Holley intake , fabricates new fuel lines & accelerator cable bracket , and last night we fabricated his parachute mount which incorporates rear guard & apron stabilisers
Team
FASTEST ET @ WARWICK 2010 & 2011
FASTEST SPEED @ WARWICK 2011
FASTEST ET & SPEED WSID 2012
PB - 6.33@113.07(1/8) & 9.88@135(1/4)
Who makes the sintered iron disk in a 4 puck? Didn't know you could get them.
tonight Chris fabricated his turbo outlet & wastegate pipes . He connected all wiring & plumbing , flushed out the fuel lines & we started his engine . All sounds very good , will be on the dyno on thursday
Team
FASTEST ET @ WARWICK 2010 & 2011
FASTEST SPEED @ WARWICK 2011
FASTEST ET & SPEED WSID 2012
PB - 6.33@113.07(1/8) & 9.88@135(1/4)
Fantastic guys, thanks for the updates.
AARON'S SPEED SHIFT AUTOS
Specialising in Vw automatic transmissions, differentials and torque converters
Stock or modified to suit your application (street, drag, off road)
Ph 0402 233 027
