FAO those who attended Dyno Day

white rabbit · Post by **white rabbit** » Tue Jul 17, 2012 6:29 pm

ive pm'd you my form
but where is my result on the list?

chrismc · Post by **chrismc** » Tue Jul 17, 2012 8:38 pm

Hmm- dyno lottery strikes again!

Quite a variation in transmission losses it seems...

Im no expert but I always thought the power at the wheels (ATW) was the only measurable quantity on any dyno with the flywheel power derived from that?

Ive always considered Transmission losses to be a relatively constant 'percentage' of total engine power...As engine power increases then so do the losses relatively proportionally.

'True' WHP/0.85 gives a decent (if not scientific) approximation of flywheel power for your average FWD car

Example: stock uk 4g h22a2- (~183 FWhp in the book) ~ 150-155atw

Owner then goes for an ATR engine swap (A8?) retaining original box with some mild bolt-ons resulting in 220fwhp so 185-190atw

The point im poorly trying to highlight is just because you increase engine power by say 50HP you don't suddenly incur a huge transmission loss as if you'd replaced the gearbox oil with treacle.....

Does this sound about right to you guys? Apologies for thinking out loud!!

Rocky · Post by **Rocky** » Tue Jul 17, 2012 9:28 pm

A1ex wrote:Cool. I'll see if they can get it on next friday 'on the way' to Newcastle

What you doing up in my neck of the woods?

A1ex · Post by **A1ex** » Tue Jul 17, 2012 9:33 pm

Rhi's friend is getting married up that way. Will be another lude up north for a weekend

A1ex · Post by **A1ex** » Mon Jul 23, 2012 10:08 am

Manifold is being repaired today and booked on the rollers at powerstation Friday to see if some of those horses and the mid range torque are going to come back

Conviced Rhi its 'on the way' to Newcastle

Post by **NafemanNathan** » Mon Jul 23, 2012 10:17 am

Glad you decided to get it repaired yourself bud

Do you know how much it's going to cost? And make sure you pop up some pics of the repair job afterwards

A1ex · Post by **A1ex** » Mon Jul 23, 2012 10:32 am

Will do. No idea how much it'll cost yet mind, I'm expecting £100 but we'll see.

A1ex · Post by **A1ex** » Mon Jul 23, 2012 6:21 pm

NafemanNathan wrote:Glad you decided to get it repaired yourself bud Do you know how much it's going to cost? And make sure you pop up some pics of the repair job afterwards

£40 to take the manifold off, reweld all 4 primaries and refit, not bad. The welding is pretty good, not perfect but for £40

Ill get some pics up later

Rocky · Post by **Rocky** » Mon Jul 23, 2012 6:57 pm

A1ex wrote:
NafemanNathan wrote:Glad you decided to get it repaired yourself bud Do you know how much it's going to cost? And make sure you pop up some pics of the repair job afterwards
£40 to take the manifold off, reweld all 4 primaries and refit, not bad. The welding is pretty good, not perfect but for £40
Ill get some pics up later

That's actually quite good. I've paid £30 to have a new flange welded to the centre pipe which I'd imagine is less work or easier.

A1ex · Post by **A1ex** » Mon Jul 23, 2012 8:04 pm

little off topic, but here are the pics of the repair work;

Need to re-do my heat wrap now tho

Lude Generation

FAO those who attended Dyno Day

Re: FAO those who attended Dyno Day