my ideas about my new 240sx!

[Jyn8923]

yes score! an 89 s13 240sx for 1,200$s! swish! anyway i have huge plans, but thankfully i know a damn good amount of what im doing since i am already a mechanical engineer yadda yadda yadda, anyway the idea is, swapping in a ca18det fully built, with forged rods pistons, everything wpc treated, balanced crank, all the usual crap right but heres the kicker im going to research into direct fuel injection. vs multi port. there fore i have the most unique ca block but the most efficient and most potential powered one. take that one to the bank

[big monkey racing]

interesting idea i want to see the finished project but it will be hard to do since you have to get the injectors and have them built into the head and the electric fuel pump to the mechanical to get the high pressure you need but overal i want to see how you do it cause if you pull it off it will be great.

[Wc240]

dont need mechanical for direct injection. OP is an interesting idea. hope you have a sense of finance cuz you cant expect this to be cheap. keep it posted

[big monkey racing]

Then how do get the extremely high fuel pressure of several thousand psi. to my knowledge there is not an electrical pump that can supply the amount of fuel.

[Wc240]

dont need thousand psi, its not diesel. the DI mazdas run around (i think)like 75. correct me if im wrong cuz im too lazy right now to look it up but its around the same as VW's DI tho. just cuz its mechanical doesnt always mean higher pressure.

[big monkey racing]

I found out that the new mazda di systems they idle around 450 psi. the reason you need the higher pressure is because you are forcing fuel into the combustion chamber which is already under pressure due to the compression stroke. diesels need the higher pressures cause they dont have plugs to ignite the fuel. they do it on pure compression. the new 2.0 ecotech engines also run the higher fuel pressure, and to my knowledge there is no electric fuel pump can do that kind of pressure but with technology today there might be one.

[the converted]

Actually diesels need it because you continue to inject fuel into the cylinder during the power stroke.

Doing the direct Injection in a car that wasn't designed for it is a lot of work to gain the advantages that you might expect. There are tons of little things like filling in the porting for the intake fuel injector without negatively effecting the intake flow. I'm also just wondering where you think that you can find the real estate to mount an injector and a spark plug in the head without intruding on air or fluid passages. It sounds like a good idea to me, but I'm just wondering if your going to end up with a completely custom machined head by the time you are done with it.

[Jyn8923]

exactly what big monkey said, mazda has DFI, and Cadillac, i propose using elements from their already DFI'd engines into my ca18, newer nissans might have it too have to check, but point is, im transfering new tech to old tech. as far as the fuel pump im looking into it still

[big monkey racing]

iot sounds like a fun plan but a very expensive one at that. I wouold like to see the finished product. but just curious why use the ca and not the sr or rb engines?

[Jyn8923]

iot sounds like a fun plan but a very expensive one at that. I wouold like to see the finished product. but just curious why use the ca and not the sr or rb engines?

good question, the rb is big heavy and strong as hell, the sr is well the sr it is it's own breed, but not as strong as the rb or the ca, the ca is basically a freaking rb only 2 cylinders cut off. the ca has more untapped potential that i want to show the tuning world, then maybe more parts will be made for it. it also sounds much better, i will be trying to get parts designed and manufactured as well. gotta start somewhere -shrugs-

[big monkey racing]

ok just keep us updated