yeah, I wouldn't recomend the 1000cc primarys, I would probably go with 720s if you really need to fuel. when I redo my fuel system, I'm taking the 720s I bought for my secondarys and switching them to my primarys and getting 1600s for my secondays.

 

Nice! Wanna trade anything for them?

Yeh, I just talked to Ken, looks like we're going with stock primaries and 1600cc secondaries.

The passenger side light was destroyed, sorry!

 

i need cash to buy paint..... and damn 1000cc primaries...thats wasting gas lol.

 

Hey man, I never forgot about you, and I'm still lookin' out.

The FB at the scrapper had the same ailment that yours does. Missing the outer lens.

Did you get a hold of James Hull in Fairfax?

 

Preferably dead ones.

 

Everything is for sale ya know. How much money ya got?


Do the cars I got from you still have the ECU's intact? I won't ever need a stock ECU again anyway. If I ever went with a rotary I'd have you build a megasquirt for me.

 

I don't remember if your cars have the ECUs still. They would be under the passenger side floorboard if they still had them.

And how much money do I have? Almost nothing Thats why I trade for everything and buy stuff at Crazy Rays :p I'll do labor too :p

It's a ~450HP TII! I have the 'vert as my fuel efficient daily driver :d

 

I'd just stay with the 550's for the primaries... 720's are going to have your idle pulse-width around 1.5 ms... and that's getting to the point where .1 ms is going to change your idle AFR by almost a whole point....

Unless you think you are definitely going to need 720's for the primaries I'd suggest going with the 550's.

Ken

 

It wouldn't really be wasting gas anyway on cruise.... the amount of fuel going in would be the same since it'd be tuned for that... The maximum amount of fuel those injectors could inject would be what changes... but I think sticking with the smallest primaries you can is the best way to go.

 

well that's not for a while anyway, not untill I upgrade my turbo and stuff. for now I'm just using the 720s in the secondaries. because I know the 550s won't be enough there for any sort of resonable amount of boost.

 

For once, you're talking on a subject I know about....

1000-1600s all around is pretty useless, unless you plan on trying to get even more power past your 4-500 mark....

 

BadNewsSS? lol, now that'd be a good race....

Can I come and watch if something does happen?

 

Why are you all saying that stuff, trying to convince me of something I already said?

I mean, if you read up, I already said I was going to stick to stock primaries for just those reasons.


And Ken, yes, the TII will get much worse fuel economy on cruse, idle, or anywhere, the engine isnt biult the same as the as the 'vert engine :o

- Lower compression
- Longer intake with restrictions (intercooler, turbo)
- Will need premium gas
- Heavier drivetrain
- Bigger wheels with less air in them

At at WOT it will suck gas like no other :p I'm debating useing S4 N/A Rotors to increase spool and decrease the amount of boost needed to produce the same power.

 

Call it "reassurance", then

 

Jason! 1000cc injectors are too big your gas mileage is going to suck!

 

I was trying to convince myk not you.... and I know the TII will get much worse fuel economy on cruise, but my point was that whether you use 1000 cc injectors or 550 cc injectors for the primaries, the economy will be roughly the same as long as you keep the AFR the same at cruise.

 

exactly. I run 720/1680 now and I already know I need to up the primaries to atleast 1000's because my turbo setup might need more fuel than I can put out. under 20lbs should be alright but over 20lbs will not. Once you have a ems system it does not matter what size injectors you run. Not sure about megasquirt but my haltech is set to run my car on the 720's and only turn on the 1680's when it sees boost.

 

Fuel economy and injector size are irrelevant.

Doesn't matter if I have a fire hose or a drinking straw... I can still get a cup of water out of them. It just depends on how long you open the nozzle at the end for.

This is injector pulse width tuning.

The problem is, it's easier to get one cup out of the straw than it is to get it out of the fire hose. You'd need the keep the straw open for several seconds, while the fire hose would need to be open for VERY VERY VERY short time.

The caveat is injectors have a lag between full open and full close, not to mention the minimum time resolution for the processor in the ECU. The larger of the two figures is your minimum pulsewidth unless you upgrade to a faster processor or more responsive injectors.

 

The worry I have with 1000cc primaries is that the idle pulse width would be less than 1 ms... unless they're low-impedance injectors with super-fast opening times... this would basically be un-tunable, or you'd run a super-rich idle (like 10-11:1)...

The megasquirt 1 chip has a resolution of .1ms for fuel, so if you try to run big injectors for cruise and idle, .1ms can make a pretty large difference. The MS2 fixes that by having microsecond resolution (100x the ms1 resolution), but that won't be viable for rotary ignition for a while. The people who design the megasquirt are busy designing a CAN bus router board, and a General Purpose IO board (also with CAN bus). These will allow the MS2 to do sequential injection, coil-on-plug ignition (or stock rotary), etc... once code is written... microsecond resolution plus sequential injection will make it possible to run pretty large primaries, but I think the cost of the MSv3 board, MS2 daughtercard, IO board, and router board is going to get close to $400 or more... so if I ever write code and sell that as an option, it's going to be close to the price that some of the more well-known ECU's.

I may also write code for the MS2 without the router board and General Purpose IO board just to get a cheaper option if there is any demand.

for the MS1 with msns-extra on a rotary, I'd just get bigger secondaries instead of increasing the size of the primaries...

The megasquirt actually allows you to tune however you want... you can turn on the secondaries based on MAP (kPa), TPS, or RPM, although you can't do it for any combination of those three.

 

Anyone want to go up to the garage with me today? How about tommorow?

I might swing by Saheeds. gimme a call.

 

oh yeah, jason, pele and I confirmed last night what the GXL's problem is.... ALL of the grounds going to the ECU are gone.... they all measured 2Kohms of resistance... and wiggling the harness brings them back intermittantly... We ran a temporary ground from one of the ECU grounds to the engine, and the car ran fine after that. Even weirder is that the car runs fine now without the temporary ground.

Needless to say I'm going to repair the grounds by cutting into the harness and resoldering anything that's loose or corroded.

 

lol mines a little higher with stock pri's and 1680 sec..and its working fine right now

 

oh I thought you were going to turbo the vert. And s5's can handle more boost that s4 setups. S5 has a larger area to port the wastegate. S4 needs to be hogged out and have a valve welded on for the flapper

 

what duty cycle are they seeing at full boost. You have to be close to the end of them at over 450.

 

well if he megasquirt it.. it should even out.. :-D ( i dont know what i'm talkin about. but its an educated guess)..