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Location:
Strathfield / Sydney
Registered:
July 2003
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2tg + EFI, few questions (done a search)
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Tue, 22 March 2005 09:11
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Gday,
Contemplating a switch to efi on my 2tg, which currently has twin webers. I've done a search, and found some info, but not the specifics that i am after.
The setup in question is an ltx8, with MAP setup, 2tg efi intake manifold, elec dizzy, water and air temp sensors.
Now, this is my first dive into the EFI game - i'm struggling to get my head around the crank angle sensor, i've never seen one, and therefore have no idea how its fitted or anything like that, or if anything needs to be changed for it to be fitted. If someone could explain this, that'd be great.
Otherwise, is there anything i should know? I'm guessing i need an EGO (o2) sensor for the exhaust, and apparently a different coil also, as well as a different fuel pump.
Just want to know that there's not something fundamentally not possible with doing this swap. Like i said, its my first taste of EFI, so any info i'd appreciate being given with this in mind 
Thanks,
Bardin.
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Location:
Strathfield / Sydney
Registered:
July 2003
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Re: 2tg + EFI, few questions (done a search)
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Wed, 23 March 2005 05:44
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Bump? Need to make the decision in the next few days.
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I supported Toymods
Location:
Australia
Registered:
November 2003
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Re: 2tg + EFI, few questions (done a search)
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Wed, 23 March 2005 05:52
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Setup sound good.
The microtech will work fine on it (although the LTX8 is about 2 years old)
Regarding the crank angle sensor, normally they are built into the dizzy, but I've never seen a 2TG electronic dizzy so I cant say for sure.
o2 sensor probably not required as Microtech doesnt use it for any calculations.
Regarding the EFI to carby, search for that independantly.
Lots of people have done it, but a fuel pump and surge tank are required, unless you can get a bolt in EFI tank.
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Location:
Strathfield / Sydney
Registered:
July 2003
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Re: 2tg + EFI, few questions (done a search)
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Wed, 23 March 2005 06:45
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Thanks, hadn't heard of that until today, would be much simpler - although i don't think the 2tgeu dizzy has one inbuilt. What can i use, if this is true?
Not really concerned if i do or don't have to put in the oxygen sensor, i think thats much less of a headache than the CAS.
Won't be switching my tank, a pump will be supplied with the EFI kit, i guess i'll add a surge tank to the buy list.
Thanks again.
Bardin.
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I supported Toymods
Location:
Australia
Registered:
November 2003
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Re: 2tg + EFI, few questions (done a search)
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Wed, 23 March 2005 06:49
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If its an electronic dizzy, it will probably have a CAS of some sort built in.
Unless you just want to run all injectors firing at once, then you just need 4 pulses in the dizzy.
If you want sequential injection (and/or sequential ignition), then you'll need 4 pulses per cam rev in the dizzy, and 1 pulse per rev so it knows TDC.
Pull the dizzy apart a bit, see whats inside it.
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Location:
Strathfield / Sydney
Registered:
July 2003
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Re: 2tg + EFI, few questions (done a search)
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Wed, 23 March 2005 07:17
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Done some googling, which surprisingly produced a few results pointing to threads on here, think you're right on the stock 2tgeu dizzy providing pulsing for batch firing. It would appear that YelloRolla is the man to talk to for a custom dizzy setup to suit, machining such things is well out of my league.
Running sequential fire, does that mean i need 4 coils rather than just the one? Will an LTX8 run batch fire?
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I supported Toymods
Location:
Australia
Registered:
November 2003
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Re: 2tg + EFI, few questions (done a search)
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Wed, 23 March 2005 07:23
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| Bananaman wrote on Wed, 23 March 2005 15:17 |
Done some googling, which surprisingly produced a few results pointing to threads on here, think you're right on the stock 2tgeu dizzy providing pulsing for batch firing. It would appear that YelloRolla is the man to talk to for a custom dizzy setup to suit, machining such things is well out of my league.
Running sequential fire, does that mean i need 4 coils rather than just the one? Will an LTX8 run batch fire?
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Sequential ignition requires 4 coils (or semi sequential is 2 coils and wasted spark), sequential injection is just 4 independantly controlled injectors.
LTX8 will run 1, 2 or 4 coils, and 1, 2 or 4 sets of injectors.
It depends how you get them set up.
I'm runnings 4 pairs of injectors, and 2 coils on my 1uz (LT8S)
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Location:
Strathfield / Sydney
Registered:
July 2003
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Re: 2tg + EFI, few questions (done a search)
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Wed, 23 March 2005 09:44
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So, it would run with a standard 2tg dizzy for the CAS signal? To change between modes requires sending it back to microtech, or..?
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I supported Toymods
Location:
Australia
Registered:
November 2003
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Location:
Victoria
Registered:
May 2002
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Location:
sydney
Registered:
March 2003
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Re: 2tg + EFI, few questions (done a search)
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Wed, 23 March 2005 09:56
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a microtech can run on points i think
all u need si an rpm signal into the unit
the microtech will batch fire injectors
what u can do is get the weber lookalike efi throttlebodies
its not cheap by time u finish its like
1000 for throttles
1000 for microtech
1000 for tunig and bits and pieces and injectors
if u stick with dizzy then u dont need anything fancy for a crank angle sensor
if u want to get fancy then it could end up costing 4000 to 5000 by time yr finished
and u will not gain anything
mayb e bit better fuel economy and throttle responce
just remember if u dont have a microtech do not buy 2nd hand ones
as they dont modify them anymore
so if u plan to run it one way now then change it later on think twice before u do
how much do u want to spend
can u fit 3tge manifold and shit to the 2t
might be cheaper option
but for the money u might have to spend u will not get many performance gains
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Location:
Strathfield / Sydney
Registered:
July 2003
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Re: 2tg + EFI, few questions (done a search)
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Wed, 23 March 2005 10:23
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Gday,
Setup is secondhand. Factoring in the cost of the bits, i'm hoping for it to be on the low side of between 1500-2000 when everything is said and done..
Not doing this for power reasons so much as reliability (not having to constantly tune), economy (less of a priority, but still a factor), and to fix niggling air intake issues. This would also give me the level of customisation i want if i ever follow the supercharged path, don't need to buy shit twice.
Interesting point you raise sideshow about microtech not modifying them anymore.. Can anyone else verify this?
Thanks,
Bardin.
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Location:
Somewhere on a dirt bowl ...
Registered:
August 2004
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Re: 2tg + EFI, few questions (done a search)
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Wed, 23 March 2005 10:32
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A crank angle sensor doesn't use a dizzy. The timing is taken off the crank, either at the flywheel or the pully.
http://www.toyotaperformance.com/sds_6.htm
http://www.toyotaperformance.com/sds_7.htm
These two are aftermarket (do it yourself kits) but their pretty well much based on the same design as what a factory setup is.
Mind you the cost out weights the amount of power you'll make. I think you'll be better off just sticking with a electronic dizzy. But if you like the idea of multi coils  then how about seeing if a 4agze dizzy could be used.
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