3sgte gen 2 injectors. how much power?

[millsi]

did a search but came up short.
how much power at the engine can a gen2 3sgte make before the stock injectors are at their full duty cycle?? also how much more if i used the gen 3 injectors (530 cc i think).
thanks heaps

[camrygt?]

I've got a really good article from a US car mag with heaps of info on a gen2 3s in a MR2 and what they did to go from about 150hp to 500ish hp at the wheels (its all on a dyno jet so figures are a little high) i'll post a link up here when I find it again.

It depends largely on what air fuel ratios you end up running and what fuel pressure you have behind the injectors. At a ruff guess i'd say 200rwkws from 440cc's would be about the limit.
I think gen3's have 540cc so they would be good for 1.22 times that or 245rw kws at the same fuel pressure.

Drivetrain losses are probably about 20% for a 2wd a bit more for a 4wd so you can work backwards from that to find approximate engine power.

this thread may be of use

http://www.toymods.net/forums/showthread.php?t=7945

depends on what you call maxed out as well some people like to keep it under 90% others are happy to go to 100% if the tune is still rich

[millsi]

sweet! thanks! looks like i may need to go bigger than 540cc to get over 300rwkw

[ToDa30/4]

u can buy sard 63517 800cc. direct fit side feeds $250 to $450 on ebay for a set of 4.shop around they should see you out ,i have them in a GT35r supported 2nd. gen. 3SGTE

[millsi]

sweeet, how do you find the gt35r? i was think of going with the biggest gt30r seeing as though i havent got to buy a wastegate on top of the cost of the turbo.
if i can make full boost by 3500rpms ish that would be good

[-==L=a=N=c=E==-]

keep in mind a few things...

Stock injectors, are accepted to make 275rwhp in an mr2. Thats at 100%, (which is right when you work out to be 320hp at the flywheel).


Next thing to keep in mind, is the stock fuel rail is not designed to flow a large amount of fuel, and larger injectors increase the problem substantially, which can and will cause major lean out issues on cylinder 3 and 4. So buyer beware.

[ToDa30/4]

this is tru ,a simple conversion to duel feed fuel rail is a bonus, millsi if u are after a gt30 internal gate turbo pm me.

[Classique71]

i can tell you for a gt4

170 AWKW - 97.6% duty cycle ..

or about 230KW at the fly - on a rough estimate

hence the upgrade to larger requres fuel rail changes as lance said to hanfdle the bigger injectors , via boring , duel or center fulelling and better FP regulators ( or a custom rail )

[ToDa30/4]

i can tell you for a gt4

170 AWKW - 97.6% duty cycle ..

or about 230KW at the fly - on a rough estimate

hence the upgrade to larger requres fuel rail changes as lance said to hanfdle the bigger injectors , via boring , duel or center fulelling and better FP regulators ( or a custom rail )

if u go 550cc. inj max on a gt4 is 230kw ,www.wolfkatz.comin the usa do a rail or i can supply the info to get it done local

[millsi]

in regards to the rail, how much hp are the standard rails good for?

[ToDa30/4]

400 hp +, the real problem as lance said is the leaning out with the standard rail mrcontrols.com/primerthis may help u

[-==L=a=N=c=E==-]

standard rails arn't bad, but definately ain't the best. Larger pumps cause a bit of a problem as well.

ways to get around it
a) bore out rail to 8-9mm.
b) dual feed or centre feed modification
c) buy a new rail (wolfkatz = the best)
d) any combination of the above

[ToDa30/4]

standard rails arn't bad, but definately ain't the best. Larger pumps cause a bit of a problem as well.

ways to get around it
a) bore out rail to 8-9mm.
b) dual feed or centre feed modification
c) buy a new rail (wolfkatz = the best)
d) any combination of the above

i used option a) & b) feed both ends & used the cold start port for the return , or c) is good if your not handy

[tooch]

i used option a) & b) feed both ends & used the cold start port for the return , or c) is good if your not handy

I've been thinking of doing this as well. So you stick the FPR in the cold start fitting, and run a fuel line to both ends hey? How do you have the fuel feed lines set up at the fuel filter end?

Ta

[-==L=a=N=c=E==-]

The only problem with boring is that you minimise the rail material, which can cause cracking if you push the pressure too much, or you take out too much material.