MPI using standard ECU

[quest]

You've missed the point with my post, your 1100+ systems are which brands? Haltec, motec, autronic among others, which are funnily enough come from Australia. So when i say we are spoiled for choice we have a large range of aftermarket systems available with large amount of features at a low price. Thats not including the secondhand market where you can pick up a wolf v3 for around 300 which controls fuel and ignition.

We don't see $300 deals like the wolf v3 this way. Seems like a great buy.
yes.... aussie brands, microtech, haltec and EMS being the more popular.

No, I didn't miss your point.... but I think you overlooked these;
We have other offerings that double our choices and evidently more attactive vs.
Having a relatively low cost tbi>mpi expandable system developed/tested by advanced starquest enthusiast is an invaluable asset (hence its popularity).
The bottom line.... whatever your budget, there is one tried and proven on a 2.6, to accomodate a MPI conversion - new or used.
we're spoiled as well ;)

[quest]

Its not the runners that are a hinderance on the l300 manifold its the plenum itself. Have you seen a stock l300 plenum its nothing like a magna one which spans the length of the head giving it a decent amount of volume, so your example of cars in the states making good hp with the magna intake has no relevance with the L300 manifold.

have u seen our 'very crappy' stock TBI 2.6 intake ?
Would you 'think' its capable of 330+hp and a tire shredding 385+ ft-lbs tq ?
Would you 'think' a stock 2.6 TBI intake converted to MPI would propell a heavy street SQ into the 11s. No spray(or plenum) on these cars.
You reckon a L300 plenum could be any worse ?

and for arguments sake, click over to another "shitty plenum"...

full wt daily, 2 valve 4cyl goes 10.8. Makes 420hp & 440 ft-lbs tq

With an open enough mind..... everything has relevance.

As I said previously, it does appear that the ~300hp 2L are making more power from comparable turbos/similar boost. Whether that can be attibuted to plenum mods, or simply better breathing characteristics of the 2L vs the 2.6... I don't know.

[RiceThief]

Stock l300 one, ford one looks like it has more volume than the l300 and better designed.

How does your example of the car making 330hp using the tbi in mpi format compare to cars using the magna manifold with the same turbo boost combo?

[quest]

the ford intake points over the valve cover in stock form, like the L300. They
rotate and 'gut' the 'plenum'.

the 334hp g54 is a TBI car. Odd enough, same guy tuned a car with fitted the FIP mpi custom intake/FIP ecu that dyno'd 321hp & 400 ft-lbs tq. Both cars ran a td05/18g at 28psi. In addition, the TBI car ran stock igntion and a bit richer A/F to avoid the leanout/meltdown caused by poor tbi distribution. wierd.

When pumping a lot of boost into the intake, the plenum may be less of a factor.
Examples I gave all run hi boost to get the job done. The ford runs 30+
Perhaps big plenums enhances efficiency particularly in the lower boost regions (and that is where the majority of us live and prefer), as opposed to being viewed as a restriction.

As widespread as plenum modding is, there has to data supporting.
One example I can recall clearly, from about 6 years ago;
An owner of u.s. 240sx SOHC (12valve I believe) he turbocharged, moded his intake
following this guidline.
http://www.sdsefi.com/techinta.htm
Like most of us hobbyist he had no aluminium welding so he fabbed a custom intake
out of steel... very similar to this one

stock 2.4L sohc intake resembles the stock magna intake we commonly use.
Two things that stuck in my mind;
1. it was an ugly pos under his hood.... hideous.
2. he was elated how it transformed his motor, especially in the upper mid to top
end.... couldn't stop raving about it. More than worthwhile he stated

another one of those things I'd like to try/experience for myself

[thrash]

reviving an old thread here..

but has anyone researched using a stock ecu from a vr4 or evo1-3 for doing twin cam conversions?

[www.18u]

You need a 2nd gen Ecu and harness with all the sensors that are not compatible. 1st gen knock sensors are different, and cannot be used. I was looking into running a evo 1-3 loom, with a evo 7 ecu and doing a flash tune a fair while ago. For the price of a evo maf and ecu, i can buy a complete aftermarket ecu and loom, with the ability to run additional options and no maf. 2ng gen ecu's can be chipped and socketed, but have less load points and scaling to a 3rd gen item. Not to mention they will require the caps to be replaced.http://mrgears.50webs.com/ECU2.htm

[wa_greg]

i just did this conversion where i used the eclipse
2l turbo loom and ecu. it plugs up to all the sensors
and i have no problem with it

[panda]

Thrash, its a lot simpler, easier & cheaper to go second-hand after market ECU. You get flexibilty of tuning, & can use your existing sensors, & doesn't need the horrible air flow meter. Also easily retuned if you change cams, exhaust, turbos etc. Just get one that you tuner is experienced with.

[thrash]

i'm aware that simply going aftermarket is the logical thing to do.. and i actually have almost all of the gear needed to do an mpi, including an ems ecu..

but the law doesn't always agree qwith logic.. the reason i ask this question is the legaility of things..

[panda]

Try putting an authentic Mitsubishi label on your ECU, just to confuse the enemy. :?

[redzone]

i'm aware that simply going aftermarket is the logical thing to do.. and i actually have almost all of the gear needed to do an mpi, including an ems ecu..

but the law doesn't always agree qwith logic.. the reason i ask this question is the legaility of things..

do you really think a remapped ecu from another car will be any easier to engineer than an aftermarket one?

[thrash]

In NSW, if you do an engine swap, the only way to engineer it would be to use the ecu from the donor vehicle to run the show.. this is because tuneable ecus are pretty much illegal here and can't be engineered.. so in theory it's easier to get an engineer's cert for a twin cam conversion by using the twin cam ecu and pretending that it's just an engine swap.

having said that, there are, apparently, some engineers who will certify a tuneable ecu.. I am on the hunt for one as this would make life SO much easier :beer

[redzone]

yes if you did a twin cam swap you could use the twin cam ecu for easy engineering, if you mpi'd a sohc using a twin cam ecu you'd be in the same boat as someone with an aftermarket ecu.

i dont understand why they dont engineer aftermarket systems, if you have an emissions test done. the reqd emissions levels for 1982-1987 arent that hard LOL .

ffs, look at LSI edit, or the ford flash tuners, they're altering the factory tune same as an aftermarket ecu does.

[thrash]

like i said, the law doesn't always agree with logic..

If i had an aftermarket ecu tuned professionally in closed loop, who here or anywhere can say that the stock car without closed loop operation would have better emissions?

apparently the idea behind banning aftermarket ecus is that the road authorities then cannot stop people from tuning their cars to a state that will not pass emissions testing, after the car has been passed emissions testing and is engineered or what not.

the ignorant people who make these laws don't consider how many loop holes they have.. getting a stock ecu chipped or flash tuned is the simplest way to break this law, and not get in any trouble for it.. you don't even need to engineer it, since it's still, technically, the 'stock' ecu.

i guy i know who got his car engineered said he used a piggy back ecu.. bit hid this from the engineer.. so it looks like the stock ecu is running the show.. so this is another way to get around it..

[redzone]

so are you sure they are banned and not just that some engineers are "scared" to approve their use? i think you need to get a copy of the relevant section of the traffic act and go over it..