Technical Tips > Engines - Carbies - Exhausts - Dissys

Tune up

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Benandsally:
Hi All,
Well by the sound of it i'm going Dyno.  :omg:  I have never been a fan of this only from bad reports
soooooooooo   :pat:
ok i will do that today
Thanks
:drag:

72vet:
Tony

Make sure they understand you’re after a tune up! Not a flogging of the old girl on the Dyno to see how much HP it has.

They should run the car at speed (60 to 80)  check the mixture for air and fuel .Then if you’re happy and game enough to allow them to rev the you know what out of it then go for it.

IMO, if the car has lots of miles on it I wouldn’t bother

demonx:
Agree with above - when mine was dyno tuned it never went over 100km hour. It was for tuning purposes only. Definitely not like the youtube dyno shootout videos!

Benandsally:
Hi All,
Thanks all for the input and advise..
I done it. It hurt but i got through it.
It hurt me that is not my car.
Before we started I had a long talk about how much i don't like Dyno's and what I would like to get out of this. I wanted more a dygnostics of what was happening rather than trying to squeeze max HP out of it
I went to Dyno tune at Moorebank. Jason explained what he was about to do and explain what happened when he did it.
The most pleaseing thing was in the end i was able to drive my car home.
Results;
I believe that In 1971 the 454 made 365hp
Yesterday we got 220 rwhp  
I guess that's not bad for a 40 year old stocker  :shades:

demonx:
Glad your happy.

Does it seem to run a lot better?

With the numbers you have to understand a couple things...
365hp numbers are exagerated sales speak and front end numbers.
With a C3 you loose nearly 20-25% horses by the time it hits the rubber
When they tuned it on the dyno, if they tuned seriously they would have had it in an accurate program not a shootout program. The difference in numbers could is massive between the programs. When my ute was done he did one run in shootout mode compared to an accurate mode and it was a 50rwhp difference.

So all that taken into consideration your 220 seems like a solid realistic number.  

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