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Posted: Wed Apr 11, 2007 10:18 pm
by Brayden
Kartman wrote:
By the way, does anyone have any anecdotal information of my many kw the stock pistons, rods and crank can tolerate?
N/A or turbo?
Also, how many revs are considered safe for the stock crank and rods? Is there the possibility of more robust rod and piston transplants from other engines?
The crank and rods aren't the real issue, but the pistons. I've melted a hole through #1 on my very first F5A, back when I was 17 and thought that the engine would rev to 8000RPM.
I'm not sure about how strong the rods are, but there are replacement pistons available. Bore sizes aren't at all dissimilar to some motorbikes.
Posted: Wed Apr 11, 2007 11:59 pm
by Kartman
I don't intend to turbo at the moment, so we're talking about N/A. My previous experience has been with two strokes - if you do a substantial power up on an engine, the stock pistons use usually the first to complain as they can't get rid of enough heat and you end up with a unreliable engine. Sometimes stock pistons are conservatively rated and will withstand large power increases without failing - depends on the designer as to how generous they were.
What caused the piston to fail in your F5a? Detonation? Lean mixture?
Posted: Thu Apr 12, 2007 12:04 am
by Brayden
I would say a combination of the two.
Colin would be most knowledgeable on conrod/piston upgrades, but as mentioned, having compatible moto parts means hi-po parts aren't too hard to come by.
Posted: Sat Apr 14, 2007 2:58 pm
by ToranaGuy
Kartman wrote:ToranaGuy - you just reprogram the EEC-IV ecu with the required setup! You do need the right equipment though - probably easier than doing it with a Delco. No, the self learn won't cope with a dramatically different engine.
In most cars, the base ignition timing is set by either the crank angle sensor or the dissy. This is in case the ECU fails and the ignition system reverts to the base timing.
Even using a Delco box, the DFI ignition requires the use of a two channel crank angle sensor. To make one of these for a dissy is not easy, I have though of machining one up for my MB, but I am trying to use electronic means to simulate the crank angle sensor for pulses from a single channel sensor. My goal is to have a small module that bolts onto the cam instead of the fuel pump cam and dissy drive. As I've mentioned previously, its for the technical challenge rather than any performance advantage. There has been suggestion that an electronic dissy from another Suzuki vehicle fits - that would be a much more sensible solution.
I do know the EEC IV can be reprogrammed, but there is very few ppl " down under " who have the gear & know how to do that just yet. The Holden Delco on the other hand, ppl have been playing with Kalmaker for years to reprogram them.
I didn't say mod the dizzy would be easy, but probably easier than trying to bolt a crank angle sensor to the front of the block or onto the bell housing at the rear of the block. Unless there is a suzi or other KEI class motor that uses a crank angle sensor that could be retrofit. Anyway, i would also do it for the tech & engineering challenge.
I did a google search, Kalmaker can be bought for $1100 with gear to reprogram the Holden Delco ecu's. Which is pricy compared to a MegaSquirt, but may have more features able to be programmed into it. It's been a while since i've read over the MS list of features.
Cheers
ToranaGuy
Posted: Sun Apr 15, 2007 1:01 am
by Kartman
I reverse engineered the Delco many years ago, I probably had live adjustment before Kalmaker did.
BTW, the later EEC-IVs have flash memory as do the EEC-V and later. The tools are available here, its just that more people were interested in hotting up their V8 Holdens, so more workshops have Kalmaker. There's some free tools for the EEC-IVs kicking around. I've got a EEC-V sitting on the bench at the moment, just gotta find some time to figure out how to work the thing.
Posted: Sun Apr 15, 2007 1:13 am
by ToranaGuy
The only " real " problem i see with the EEC is the eeprom is soldered onto the board ( every one i've seen is anyway), making it harder to work with, you can't just unplug the eeprom & chuck it into your rom burner. Shame really.
Cheers
ToranaGuy
Posted: Sun Apr 15, 2007 11:09 am
by Kartman
Ford were a bit friendlier - they put a connector on the back of the box for programming duties. No need to remove chips.
http://www.moates.net/index.php?cPath=25_35
http://www.moates.net/index.php?cPath=50
http://www.moates.net/index.php?cPath=33
Posted: Sun Apr 15, 2007 12:24 pm
by ToranaGuy
Yes, i do know you can burn the eeprom without removing it.
Nice site you linked to. Looks very interesting. I might have to get myself some of that gear.
Cheers
ToranaGuy