Some injector help please - Toyota Nation Forum : Toyota Car and Truck Forums

landtank · 02-18-2007, 06:11 PM

Hello everyone,

I joined today with some hope that someone might be able to help me. I drive a 1996 Land Cruiser and thoughts of forced induction have been on my mind for a while. I built a custom MAF chamber for use with the newer style sensor Toyota is now using. A side effect of this is I can now run larger injectors.

The best injector that I've found is a Denso # 23250-74160, and will drop in without modification.

My understanding is that it was used on the MR2 NA 3SGE engines but I'm not sure what years.

If anyone could help me out with this info I'd greatly appreciate it and if by chance someone knows where I could source 6 of these either new or used I'd be in your debt.

Thanks for your help

Rick

tHa kNiGHt FaLL · 02-18-2007, 06:52 PM

your Land Cruiser has OBDII and will shorten your pulsewidths if you put on bigger injectors... compensating for the same amount of fuel delivery as before you put in bigger injectors.

modifying your MAF you will account for more fuel by itself... but not for bigger injectors. not w/o a tune. you need to tell your computer you want more fuel. and it will give it to you.

landtank · 02-18-2007, 06:55 PM

well my LTFT is running at 19.5% with the new MAF installed. I'm assuming that it's adding fuel through the trim, correct.

tHa kNiGHt FaLL · 02-18-2007, 09:47 PM

Quote:

Originally Posted by landtank

well my LTFT is running at 19.5% with the new MAF installed. I'm assuming that it's adding fuel through the trim, correct.

well all cars are different... you'd have check the LTFT before the new MAF was installed and after to know the difference.

and all cars read their LTFT a different way. some in percent, some integers, and some a solid number.

but in my best estimate as well, i'd say its adding fuel... to kno how much is hard to tell.

but if you kno how LTFT works then you know adding bigger injectors the computer will lower that percent to compensate for running rich.

landtank · 02-19-2007, 05:21 PM

The LTFT pre MAF was around 3%. That is how it's displayed and I'm taking it's word that it's right. Right now stock injectros are Denso Saturated at 315cc/min. I was hoping for a larger injector that would be close enough to work with the stock ECM. I might pick up a cheap set of 325s off of ebay just to see the effect on LTFT before getting cray on searching for those 370s.

tHa kNiGHt FaLL · 02-19-2007, 07:30 PM

Quote:

Originally Posted by landtank

The LTFT pre MAF was around 3%. That is how it's displayed and I'm taking it's word that it's right. Right now stock injectros are Denso Saturated at 315cc/min. I was hoping for a larger injector that would be close enough to work with the stock ECM. I might pick up a cheap set of 325s off of ebay just to see the effect on LTFT before getting cray on searching for those 370s.

it might work...

but keep in mind the most power is made w/ the leanest mixture w/ the lowest octane before detonation...

so adding more fuel w/o adding more air... you could end up loosing power

landtank · 02-19-2007, 08:46 PM

Here is a link that documents my progress. Don't laugh at the materials used please. I just got back from finalizing the design and should have a couple of aluminum housings in a few weeks.

Custom MAF

tHa kNiGHt FaLL · 02-20-2007, 02:42 AM

impressive...

i'm very impressed w/ the level of technical research gone into it.

you need to dyno it and see the difference...

as far as your original question... here on this site... the 3SGE isn't a common state side motor. so the amount of info you'd find on it here is prolly insuffient (sp)... even my MR2 factory manual doesn't list anything about it.

landtank · 02-20-2007, 09:28 AM

Quote:

Originally Posted by tHa kNiGHt FaLL

impressive...

i'm very impressed w/ the level of technical research gone into it.

you need to dyno it and see the difference...

as far as your original question... here on this site... the 3SGE isn't a common state side motor. so the amount of info you'd find on it here is prolly insuffient (sp)... even my MR2 factory manual doesn't list anything about it.

Thanks, I know that motor isn't popular here but I have been in contact with someone over in Japan. Unfortunately he doesn't know anything about injectors and needs me to tell him exactly which year and model they come from so I get the right ones. If only Toyota and Denso P# where the same.