SR20 - Finished with Tuning.... for now... i think @ 410rwhp

[codyace]

Very interested to learn/know why you used a 30 psi base fuel pressure...is that at idle, or with vacuum off?

Can't wait to check out the dyno charts...

[ZL-Auto]

Fuel Pressure regulator was set at 30psi, the engine is fresh and i didnt really want a "new" motor making the kind of power i know it will make once i get some miles on it and am confortable trying to push it and see what it will actually do. The fuel pump in this case can push 100psi, and the fuel pressure regulator can handle that kind of pressure also. However, i will more than likely tune it for max pressure of 3bar or just shy of 50psi. The fuel injectors used are "adjustable" depending on peak fuel pressure. Siemens Fuel Injectors, can run between 600&1000cc of fuel. I believe set at 30psi it is running about 650cc of fuel.

The overfenders are 50mm's, but they were flexed slightly during installation, so measuring the variance between these and stock there is an additional 15mm of clearance that is not gained by simply attaching the standard 50mm overfender.

THANKS

[codyace]

Fuel Pressure regulator was set at 30psi, the engine is fresh and i didnt really want a "new" motor making the kind of power i know it will make once i get some miles on it and am confortable trying to push it and see what it will actually do. The fuel pump in this case can push 100psi, and the fuel pressure regulator can handle that kind of pressure also. However, i will more than likely tune it for max pressure of 3bar or just shy of 50psi. The fuel injectors used are "adjustable" depending on peak fuel pressure. Siemens Fuel Injectors, can run between 600&1000cc of fuel. I believe set at 30psi it is running about 650cc of fuel.

The overfenders are 50mm's, but they were flexed slightly during installation, so measuring the variance between these and stock there is an additional 15mm of clearance that is not gained by simply attaching the standard 50mm overfender.

THANKS

I've actually never heard of a car being broke in on a lower fuel pressure, so it's interesting to read this...(not hating, curious)

I'm also curious in your injectors? All injectors will flow higher with more fuel pressure. My Seimens 60lbers are rated 60lbs as they are tested at 3 bar fuel (normal, standard pressure). At 4 bar they act like 72lbers.

Now not all injectors can handle this. MSD/Rochester (50lb/ 72 lbers) hate high pressure, and typically fail @ 4 bar.

Keep us updated

[idahotuner]

i only rebuilt my head with new cams and springs. and new valve seals. waht would you guys recomend as a break in for this.

[codyace]

/\ /\ Like any new normal engine being broke in.

[idahotuner]

well the thing is i dont know whata "normal" engine breakin is

[codyace]

well the thing is i dont know whata "normal" engine breakin is

...i've noticed a severe lack of searching many of you guys on here...come on now, don' tlet me down, use the forum as a resource, and use google to your aide

Everyone has different opinions on break in...gather the info, form your conclusion, and go from there...

[idahotuner]

well that is what i mean by "normal".

i have heard several different methods, but msost of the mseem to be for a full rebuild, and the opinon differ quiet a bit.

you are assumeing i havent searched. not true. i could stand to do some more. i suppose. but i was just asking your opinons.

[otterman]

Just drive the piss out of it for 4000 miles.

[codyace]

Just drive the piss out of it for 4000 miles.

LOL

Some guys do this, and it works great....much like a Dyno Break in

I also know some guys that go through the rpms a bit for half an hour, take it out, full boost 3rd gear, and then bring it back in, and change the oil.

I typically like to idle/rev range it for half an hour or so. Then I drive, fluctuating rpms (not babying it, not beating on it) for 100 miles. Change Oil, inspect for material.

Then I drive for the next 900 miles like a normal human being. Getting in the hammer a bit, but not for mulitple gears...maybe a redline pull or two. 1000 miles, change oil again. I live off of Route 611 in PA, so I typically like taking the entire 'distance' of 611 as part of the break in...nice, windy, different speed road

Then from that point on, I say all is well to beat the **** out of it. I typicall

[idahotuner]

LOL

Some guys do this, and it works great....much like a Dyno Break in

I also know some guys that go through the rpms a bit for half an hour, take it out, full boost 3rd gear, and then bring it back in, and change the oil.

I typically like to idle/rev range it for half an hour or so. Then I drive, fluctuating rpms (not babying it, not beating on it) for 100 miles. Change Oil, inspect for material.

Then I drive for the next 900 miles like a normal human being. Getting in the hammer a bit, but not for mulitple gears...maybe a redline pull or two. 1000 miles, change oil again. I live off of Route 611 in PA, so I typically like taking the entire 'distance' of 611 as part of the break in...nice, windy, different speed road

Then from that point on, I say all is well to beat the **** out of it. I typicall

ok thnaks. this is waht my firends that went to school for mechanical engineering school for said to do. let it get up to operating temp and then rev it up. a bunch let it idile rev it up. for about half an hour and then change the oil again.

it is going to stink because i need to break my clutch in and new brakes in and a lsd in.

so it will be interesting to see how it all works out.

[ZL-Auto]

[s13_silvia_redtop]

hey how do you like your AEM EMS? i have some what the same setup as you and its about to start coming together so i need to search engine management. also how much were your injectors and where did you by them? thanks!

[idahotuner]

for my engine management i am just gettign a reflash from enthalpy.

for my injectors iam gettign them from http://www.deatschwerks.com/catalog/

[codyace]

....what are the two boost levels at? 16 and 20?

Also wonder about the big camel hump in torque....I wonder if it's cam/intake related....

[idahotuner]

i dont like how it is so bumpy. i want my dyno to be a smooth one

[ZL-Auto]

Boost Levels are 16 & 22

The injectors are siemens adjustables, bought from Five O Motorsports NOTE: you have to make a custom bracket for your fuel rail, these injectors are about 3/4" longer than the standard injector.

The AEM EMS is a good system, but to do it all over again, i would go with a POWER FC. The AEM requires a few small things that are not included with the management system when you buy it. IE a CAS gear replacement to make the pickups work with the AEM. The Power FC is designed to work with the stock CAS Gear.

[ZL-Auto]

So, Really the car made 459rwhp on 30psi of fuel and high boost.

Which for this motor and turbo setup.... is still somewhat low boost.

[idahotuner]

wow. od you think it got high power from such a low fuel pressure becasue it could be running lean. which would give more power

[codyace]

wow. od you think it got high power from such a low fuel pressure becasue it could be running lean. which would give more power

30 psi of bae fuel pressure is about 5-6 psi to low IMO for this setup. I have still yet to hear of any building doing this....

As far as the shakey graph, it could be a combination of things, but he's at smoothing 0, so that's not to bad IMO for a 0 smoothed graph. Alot of that is with wastegate flutter at times....

Boost Levels are 16 & 22

Would think there would be a little more torque out of it...not a bad graph though

The injectors are siemens adjustables, bought from Five O Motorsports NOTE: you have to make a custom bracket for your fuel rail, these injectors are about 3/4" longer than the standard injector.

I've never heard of these ever. Fuel pressure is always determined by FPR. Are you sure they are not just run of th emill Seimens/Deka/Mototron 60lb injectors? That is what I have, and I'm pretty sure what you have as well...engine bay pics would really help.

The Power FC is designed to work with the stock CAS Gear.

That alone would be enough for me to always consider it. Trigger wheels and picksup and that sort are just one more point of failure at times :/

[Mouse6933]

hey man im going to be runnign a very very similar setup, wonder what a/r ur 3071 is i got the 64 ,and also im running aem alky injection kit.... and im bottom mount setup as well. do u happen to know the max effeciency of the 3071, i was hopin to make 470whp but i wont find oiut for another 2 weeks or soo. thanks ffor the help

myles

[s13_silvia_redtop]

hey ZL auto. which ones did you get (injectors) and do you like them? were these the ones?

Siemens 60#-LONG (625cc/min. at 3 bar, 43.5 psi.) - High Resistance: 12.0 Ohms

[codyace]

hey man im going to be runnign a very very similar setup, wonder what a/r ur 3071 is i got the 64 ,and also im running aem alky injection kit.... and im bottom mount setup as well. do u happen to know the max effeciency of the 3071, i was hopin to make 470whp but i wont find oiut for another 2 weeks or soo. thanks ffor the help

myles

470 may be a bit much, but it is possible. I would say on the .64 you may be looking at a solid 430-440ish.....but then again, thats at 19-21 psi...

[codyace]

hey ZL auto. which ones did you get (injectors) and do you like them? were these the ones?

Siemens 60#-LONG (625cc/min. at 3 bar, 43.5 psi.) - High Resistance: 12.0 Ohms

Thats what I have....

[Mouse6933]

470 may be a bit much, but it is possible. I would say on the .64 you may be looking at a solid 430-440ish.....but then again, thats at 19-21 psi...

you what what the max effeciency of this turbo is, and u think 430 with alky also? thanks alot

[ZL-Auto]

http://s231.photobucket.com/al...obert/

Please refer to this link for pictures.

[codyace]

You what what the max effeciency of this turbo is, and u think 430 with alky also? thanks alot

http://www.squirrelpf.com/turbocalc/index.php

[codyace]

http://s231.photobucket.com/al...obert/

Please refer to this link for pictures.

You have normal Seimens 60lb injectors. Nothign adjustable about them. They are just designed to flow more CC of fuel dependend upon PSI of fuel going through them (as are most injectors)

However, would you be able to take more around the injector area where they sit in the intake? I had a HUGE issue with those OEM gromets pushing out and sliding up around the actual injector and needed to modify the manifold because of it...

[DrifterProdigy85]

How safe is it going insanely lean after 5500rpm? Im thinking not very unless it just want reading accurate.

[codyace]

that could also be reason for the camel hump in the torque curve...lol

man I musta been sleeping when I looked at that....