4agte injector sizes

[matt dunn]

i would tend to agree, i think willie pushed about the max out of the 550's he had with just over 300kw atw.

I run 550's in my 7AGTE at the start,
got to 380hp atw ( whatever that is in kw ) with a wee raise in rail pressure on the dyno before the flywheel came off.

[~SlideWays~]

Speedtech tune on 4agte:

365cc (4agze) @ 13psi = 149kw atw
510cc (evo 1-3) @ 17psi = 212kw atw

Standard fuel pressure and the injectors where the limiting factor on each.

[evil_si]

ok so i have a few options at the moment,

550cc rx7 injectors easy to fit, will bolt straight in
850cc rx7 injectors, are side fed so i will need to make / modify a rail to suit

any one out there currently using 850's?

had been thinking about using standard ones and jam a couple of 1000cc injectors in the intake, but i figure id better not rob to many bits from my rx7

[mjrstar]

ok so i have a few options at the moment,

550cc rx7 injectors easy to fit, will bolt straight in
850cc rx7 injectors, are side fed so i will need to make / modify a rail to suit

any one out there currently using 850's?

had been thinking about using standard ones and jam a couple of 1000cc injectors in the intake, but i figure id better not rob to many bits from my rx7

I don't rate the chance of 850's giving you a healthy idle, but it might be worth a try..

^^Interesting also that the 510's would only make 212kw atw. I would have thought they would be good for around 230.

[IH8TEC]

i would tend to agree, i think willie pushed about the max out of the 550's he had with just over 300kw atw.

I run 550's in my 7AGTE at the start,
got to 380hp atw ( whatever that is in kw ) with a wee raise in rail pressure on the dyno before the flywheel came off.

different size motors though, thats 285ish kw atw.

[matt dunn]

different size motors though, thats 285ish kw atw.

doesn't really matter, you need X amount of fuel to make X amount of hp on any motor.

[loose_unit]

Just gotta be careful with rx7 550's that you get a well matched set as they are made in pairs. Out of 6 that I had my tuner was only happy with 3 of them even after cleaning etc, and he wouldnt put them in my car. I ended up going with evo 7 560's as they apparently have a really good spray pattern. Ive got an old g1 v4 lem and have had no issues with the 560's in there.

[~SlideWays~]

^^Interesting also that the 510's would only make 212kw atw. I would have thought they would be good for around 230.

Thats what the tuner said, he normally see's 220kw on a mitsi so put it down to possibly lower pressure in the toyota fuel system vs mitsi.

Thats with a Walbro (sp?) 500hp jobbie.

212kw's is plenty for 920kg though