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Forum: EcoModding Central 09-30-2010, 02:04 PM
Replies: 36
Views: 20,153
Posted By EdKiefer
don't have any specific experience with your...

don't have any specific experience with your engine but this might help .

Think of valve timing events(intake open/closing , exhaust open/closing) as if it was a SOHC (1 cam) , then split it up to...
Forum: Aerodynamics 07-30-2010, 02:00 AM
Replies: 8
Views: 3,557
Posted By lunarhighway
the hatch is the wrong angle for the flow to...

the hatch is the wrong angle for the flow to staty attached. the spoiler virtually decreases this angle. cars like a porche 911 or the saab 900 also use a big poiler at the rear, that actually gives...
Forum: EcoModding Central 07-25-2010, 03:05 PM
Replies: 9
Views: 2,101
Posted By ShadeTreeMech
you have a toyota powered Datsun mentioned, but a...

you have a toyota powered Datsun mentioned, but a celica listed (cool car, btw)

What datsun are you talking about?

I wouldn't worry about the rad getting hot til about 200 to 220, which is...
Forum: EcoModding Central 07-25-2010, 02:45 PM
Replies: 9
Views: 2,101
Posted By RobertSmalls
You should probably set it a bit higher than you...

You should probably set it a bit higher than you have it. My car turns on the fan 10°F above the t'stat fully open temperature, and turns it off around t'stat +3°F.

The radiator fan should come...
Forum: EcoModding Central 07-23-2010, 02:32 PM
Replies: 24
Views: 7,903
Posted By Olympiadis
Yes, for a lot of engines like yours it is for...

Yes, for a lot of engines like yours it is for most of your driving.
It also depends on loading.
The more the cylinder is loaded, then the less it is true.
A loaded cylinder has more leeway...
Forum: EcoModding Central 07-21-2010, 09:24 AM
Replies: 24
Views: 7,903
Posted By comptiger5000
With 8+ psi of boost, even with the low...

With 8+ psi of boost, even with the low compression (although it depends on the cam somewhat), you'll probably start pinging before you overshoot the optimum timing.
Forum: EcoModding Central 07-21-2010, 08:54 AM
Replies: 24
Views: 7,903
Posted By EdKiefer
The only thing you might want to check is...

The only thing you might want to check is head/EGT temps .
With running ignition timing high with no EGR and lean A/F (17:1 ) .
You might get a condition were head temps raise during cruising ,...
Forum: EcoModding Central 07-20-2010, 10:18 PM
Replies: 24
Views: 7,903
Posted By Olympiadis
Well, from what I'm seeing on your graph, your...

Well, from what I'm seeing on your graph, your 7.74 PSI x 2.03 = 15.75 inches Hg seems about right for a steady cruise speed.
Without EGR and with your low compression the numbers I gave as an...
Forum: EcoModding Central 07-20-2010, 07:28 PM
Replies: 24
Views: 7,903
Posted By Olympiadis
If you could please verify the units along your...

If you could please verify the units along your X-axis there.
PSI and inches of Hg are not the same thing.

edit: If you don't completely trust converting the figures, then just put a vacuum...
Forum: EcoModding Central 07-20-2010, 05:44 PM
Replies: 24
Views: 7,903
Posted By EdKiefer
How much timing are you running at idle and 1k...

How much timing are you running at idle and 1k rpm . How many maps are there between 1k and 2k (map ever 100, 200, 500 etc) rpm ?
Does This turbo engine have a EGR working , that will be a factor...
Forum: EcoModding Central 07-20-2010, 02:31 PM
Replies: 24
Views: 7,903
Posted By Phantom
See if you can add a knock sensor to the...

See if you can add a knock sensor to the management system it would just go into one of the freeze plug locations. That way you will be able to see the knock and adjust from there.

My 03...
Forum: EcoModding Central 07-20-2010, 01:58 PM
Replies: 24
Views: 7,903
Posted By EdKiefer
I have some limited experience with stand alone...

I have some limited experience with stand alone units . The factory changes spark advance a lot in most cars some goes to 40 deg at low speed/ part throttle vacuums .
On after market though on many...
Forum: EcoModding Central 07-20-2010, 01:27 PM
Replies: 24
Views: 7,903
Posted By comptiger5000
On most engines, you can be well into the 35 - 45...

On most engines, you can be well into the 35 - 45 degree range for SA before you start to lose efficiency.
Forum: EcoModding Central 07-20-2010, 12:48 PM
Replies: 24
Views: 7,903
Posted By Olympiadis
"Light load" is the big DEPENDS in your question....

"Light load" is the big DEPENDS in your question.
During normal driving it is often hard to actually hold a solid "steady" cruise at one load level. If you could, then as you said the optimum SA...
Forum: EcoModding Central 07-20-2010, 12:39 PM
Replies: 24
Views: 7,903
Posted By Tygen1
I'm running between 38-40 normally on flat to...

I'm running between 38-40 normally on flat to slightly hilly roads. Our motors are different though...
If you have a wideband, why not try leaning it out on the light load cruise, then you may get...
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