Engine dyno tune?

[russtik]

Anyone had their freshly built engine run-in and mapped on a dyno before? i.e. Engine out of the car.

Any decent people for this in the South-East? Idea of cost? Worth doing over sticking it in the car and mapping on the rollers in the normal fashion?

Cheers

Russ

[DJ.]

Never done it, but I always liked the idea, because you know there aren't any leaks and the engine has a safe set up as soon as you start driving.

I suppose it is impossible to get exactly the same air flow to the intake and the same exhaust, so for best results, a rolling road tune as well would be ideal

[greenwoo]

not sure, but i'd guess costs wouldn't be any less than doing a rolling road as they'll have to bolt it to the various bits n pieces in the dyno cell.
Not sure what the real world advantage would be given that it wouldn't be connected to your exhaust, plus you can't just take it out for a quick spin to see how you feel about it....

[russtik]

I've heard something along the lines that it benefits the mapper by being able to consistently hold the load sites for as long as they want.

It would benefit me by being to drop a fully functioning engine into my car without having to get it transported to the rolling road. And also having the engine run-in under safe conditions is an added bonus.

Downside as mentioned would be the likely need for a rolling-road tweak once connected up to my exhaust etc.

[Dick]

issues are mounting to the dyno so it not to cheap most have a general water cooling system they use but you need more than that to set them up. They would have to make engine mounts , drive connector to the dyno, engine management system, sensors to check all is ok and an exhaust of some sort but then your not getting a true representation of whats in the car
Unless you can find some one with the dyno setup all ready save your money.

[greenwoo]

think you'll find that some r/roads can hold a cell/target site as long as they want as well...

can't you get a generic map that will allow you to drive it to a r/road? if the builder has done a few to a similar spec i'd imagine that he may have access to something that's safe....if not then i can see that it's easier to transport an engine than trailer your car....although not sure i'd want an engine in the back of a car after its just been drained....

as for running in, can't see that there's a difference between putting the engine through its paces on a dyno vs rroad.....either way i'd imagine that they'll work from the bottom upwards to make sure that the fueling is right, so either way they still cover the same rev range.

[David T]

I think I saw Dave Walker in PPC say that it took a day to do the install of engine in the dyno. So overall it's going to be far from cheap and therefore I assume you'd need a pretty special (expensive) engine to justify it.

[b33fy]

I can't see any advantage in it in turns of cost verses benefits. I can understand it from an engine builders perspective where they are wanting to test and guarantee their work, provide a print out etc. Though the customer pays for it in the end.

In terms of hitting or holding bins, it would be just as easy when installed and also take into consideration realistic running conditions, driveline drag etc

If the engine wasn't able to hold the bins then the chances are it wouldn't drive right and is fuelled or timed incorrectly. Could be mechanical or mapping issues.. whatever, it would need to be sorted. The obvious example is hunting when idling.

I wouldn't waste your money Russ, get it all installed then to a tuner / mapper to sort.

[Nash]

Yep Dave Walker (Emerald) has a dyno at his place. It may be worth speaking with him directly Russ. You still have to ship the engine there and as said elsewhere you will then need a tweak on the rollers?! Unless Dave says different.

[locost220]

I have a couple of pintos to build up and intend to put together a basic test rig with some old engine mounts, leaking gearbox , polo rads kindly donated by felleo skcers to run them in and test the basics like oil pressure and compression test rather than have to strip out the road car.
But think you can't beat a proper RR test.