44 replies to this topic

[knoath]

Well I had my first experience with a dyno yesterday afternoon..... and I'm not sure I liked it.
It started when the Hatch was placed on the dyno, which was locked.
Placed in Park so the Mech could check and adjust the timing....then the bugger jumps into Reverse!!!. Off the back of the dyno, crashing into the exhuast fume extraction box. (And a Drag car sitting off to the side...... no damage, how, I don't know. He said not to worry about it as the were not running it anymore... )Luckily the frame for that was at taillight height and that was all that smashed! No paint or panel damage. Very lucky!



Then the worst part of the afternoon...... I got the HP output!





Now I know she's just a 253 on gas, but man..... I feel like getting a 308 and working it !!!
So that's my first experience with a dyno!!!
After all the dramas, there was no charge, so I got a tune for nix!

[antelopeslr5000]

Talk about lucky! It could have been a hell of a lot worse.

How did it jump into reverse??? Was the hatch strapped down correctly?

Edited by antelopeslr5000, 16 June 2006 - 06:38 AM.

[knoath]

Wasn't strapped down at all! Had just been parked on the dyno and was checking the timing....he reckons he didn't push it into park properly....I have a Hurst shifter....pig of a thing sometimes. I don't hold it against him, shit happens.

[knoath]

Dunno what's been done to the motor before I got the car. I know it's got a pretty wild cam in it 'cos it'll idle in park/neutral at 1200, and in gear at 600, well, it'll try to die so I'm gunna bring that up a tad.
The previouis owner had a 350 chev in it and threw this in to sell it. He told me it was in his old man's Datsun sports sedan and when I registered the car in my name the engine no.s didn't match up, the engine no on the Vicroads records showed it was still in the Datsun (which amazes me, cos how could you register a Datsun with a 253 in it????)!Apart from that...... I can't tell you any more.

[knoath]

Well there's no worry about having to do that!!!

It's pityfull, I know....
But it gets me round for $25 a week so I can't complain... being a daily driver.

Now.... maybe I should put some effort into convincing the Minister of Recreation, Sport and Finance that I need a project! I would love a 4dr (with 2 kids now) so.......

Edited by knoath, 16 June 2006 - 10:19 AM.

[MRLXSS]

jeez unlucky there dick, at least it was only a tail light tho! Would be a pretty sickening feeling though!


Yeah i reckon u can pull a bit more out of that little beast! or as you said, JUST GO A 308!

[Heath]

You only have to strap down cars for 400+ RWHP.

All cars have to be strapped down. Maybe at 400HP+ they strap them down to a further degree, but every car gets strapped down at least at the diff.

[LXCHEV]

Sorry to hear about the drama's and damage Dick, never a nice feeling, but it could have been much worse!

My dyno guy always puts the cars in neutral as soon as they're on the dyno. And they always get strapped down too - even low powered cars. I'm surprised to hear people talking about workshops not strapping cars down unless they make real high power. I'd be a bit anxious about that!!!

As for the peak power at 120kmh, it was probably done in 2nd gear. This is quite common due to some dyno's having limits on wheel speed.

And I tend to agree with the others that I thought it'd make slightly more than 83kw too. As a guide, my 253 made 86kw, and that is 100% dead stock, standard exhaust manifolds and original system, 2 barrell Stromberg etc. Auto's will always rob more power than a manual though too... etc...

Man looking at the dyno graph - it was running very lean originally!! Is the car driving any different since the tune???

[knoath]

Yeah, she's a fair bit smoother now, with a little more power down low. He shaved 20 thou off the metering rod to give me more flow, so it's cool.
I wish I had never opted for the single system when I shoulda payed the extra for a twin....I noticed it dropped power when I drove out the exhaust shop! Been spewin since.......
Might have to talk to YiriSS about another twin system....he knows someone out his way... supposed to be good.
May look for another donk.... really got me down now.
Still want the 4dr though.
How long till Santa comes?
I've been a good boy, honest!

[knoath]

Yeah, mine was chocked..... but went the wrong way!!!!
He he he

[TORLX8]

Geez I would be freaking if my car jumped off the dyno like that.
It dropped into reverse 1 day in the driveway and I had to chase it out onto the street and jump in it to stop it. Luckily mine didnt hit anything.
The warm 308/T350 in my hatch made 153kw at 110kph but is also geared quite low with 3.90:1.gears.
I thought it would have done better than 153kw, but he reckons thats pretty good for a 308. He reckons that is around 250hp. Would that be right?
He also didn't strap the car down, but said it was because there was no room with the exhausts running so close to the 9 inch. Didn't want to burn his straps.
Stuff his straps I say, what about my car!!

[YiriSS]

dick

i would take the hatch to gas research in dandy south

when my old 308 was running around 110 kw at the rear and we only found that out when the CO's were measured, it was running pretty lean.

i was told to take it to gas research and told them what it was doing.

$75 later i got drove the car home and it was putting out 135 kw at the rear and still economical.


once i sort out this personal mess, the hatch is going back to petrol, (club plates)
so economy is no longer going to be an issue
i want to model my 383 on ultrablues 308, just bigger cubes

still working on those tickets at this stage, sorry its taking so long, everyone wants tickets to play against those black and white XXXXX!

[TORLX8]

[QUOTE]no witnesses to bruise my ego

I did have a witness...this girl was walking along the street at the time. She just kept walking like nothing had happened. Probably laughed her guts out when she got around the corner.