Tunning Vs Run In

[silver gts-t]

Hi Guys

Wanted to get some opinoins on what i should once my engines ready.

Once its done should i clock some Kms on it before the tune or should i get it tuned first?

I'm predicting the current tune will start the engine and run it but how well i dont know.

Would like to hear what people have done to their own engines

Running a HKS Fcon V pro

Thanks

John

crappy mob pic of engine

[2rismo]

Bed the rings in with constant revs (no idling) for about 10 mins and then throw it on the rollers and tune it once everything is up to temperature (which it will be if you've just fired it up and run it for 10 mins.

If things were going to get loose after 1000kms/5000kms/10000kms, they just weren't done up tight enough.

Start it, tune it, race it. That is all.

[bubba]

By "constant revs", do you mean constantly modulating the revs?

[R31Nismoid]

If things were going to get loose after 1000kms/5000kms/10000kms, they just weren't done up tight enough.

Start it, tune it, race it. That is all.

Agreed!

Once the rings are bed in, tune it up. My two motors so far done that way, as with countless other motors all over 350rwkw minimum

[VB-]

By "constant revs", do you mean constantly modulating the revs?

yeah i would assume he means constantly revving it, not allowing it to idle, but dont hold it at the same revs all the time???

[2rismo]

yeah i would assume he means constantly revving it, not allowing it to idle, but dont hold it at the same revs all the time???

You can vary it a bit if you like but it's not essential. This is one of those topics where everyone has their own idea and arguments form at the drop of a hat. The key is not to let it idle or lope along at low revs. The best analogy I can think of is that your engine runs more smoothly at revs than it does at idle. Higher revs idle (3-5krpm) keep the cams turning smoothly and 'true' to their centre and also keeps oil pressure/flow up to the valvetrain and this is what you want.

[Al]

Bed the rings in with constant revs (no idling) for about 10 mins and then throw it on the rollers and tune it once everything is up to temperature (which it will be if you've just fired it up and run it for 10 mins.

Pretty much what my mechanic did and loaded the crap out of the engine on the first few passes.

But there are alot of other new items in an engine build, other than bedding in the rings, that's why he made me bed in the engine for a 1000km before doing a final tune and allowing me to cruise on the Fwy/Hwy. The "bed-in" tune was pretty much 95% of the final tune; once things have worn in the engine does get a bit looser, thus the final tune is done.

My mechanic built the engine, so i just done what he felt best. As stated earlier, everyone has their own opinion on the issue.

[silver gts-t]

Thanks for the advice guys,

During the bed in should the oil be changed at all or once the 10mins is up change the oil and then get tuning?

[R31Nismoid]

from what i was told, synth from the first turn of the key was in my motor

[2rismo]

I'd recommend Joe Gibbs run-in oil for cam bed in and tuning and then change it once it's tuned. Job done.

[silver gts-t]

will do,

thanks for the info guys

let you know how i go in a week or 2

[Phobic]

everyone has an opinion on this. i go with the opinion of tune it and run it in how it will be driven. many people think you should rack up km's on a run in tune then do a proper tune, but each to their own.