lots of dough..still slow

[Geoff]

If you beat a low 14 second car then your van is obviously pretty quick...however it will depend on your driving and how much boost you throw at it if you want 13's. What is the rrr's base pressure set at? Can you do a burnout? How long does it take for boost to come up while powerbreaking? At what rpm do you have full boost while driving?

[daytonajesse]

If you have been running that rich, you should change your oil pretty soon...

[TRRBOJEEP]

Quote:

Originally Posted by daytonajesse If you have been running that rich, you should change your oil pretty soon...

Heard that! (already did)

Looks like my tune ended up this way:
fuel psi @ idle = 20psi
@ "0" vac = 35psi
ramps up 2:1 from there.... 15psi boost = 65psi fuel pressure
@15psi boost on comes the alky @ 15gal/hr rate.

It's still a little on the "rich" side, but at least it's not "pig rich"!

Runs like a mutha now. The trans will probably grenade before the end of the summer.

[BoostedToys]

TRRBOJeep...I Alway wanted to turbo a jeep. Except I wanted to do the 4.0 I-6...It looks soooo easy on that motor. Nobody would see it coming
Last Cherokee I had had Factory Posi and the transfer case that lets you drive in full-time 4x4 (AWD)...would have been sick

You guys are dead nuts on the oil...It's gotta go! See if I can do it this weekend.

I tuned it a lil over lunch and I think it's getting alot closer. Feels pretty good. So far: 26psi static..17 idle (sputters a hair at startup) FMU is set with 3.5:1 gain. I finally got my shop compressor and it made tuning that FMU a walk in the park. Also had to put a valve on the FMU's signal line to tune. I couldn't get it down far enough with a restrictor.

[Phreakish]

yeah, +40%'s are a bit big from what others have done... +20's probably would have worked better.

its hard to say what to do, either spend the $$ on new injectors (again) or buy a custom cal... or trade the injectors. Gotta lean that thing out a bit to really get the most out of it, or you'll just suck gas and not go very fast.

[Geoff]

Quote:

Originally Posted by BoostedToys I tuned it a lil over lunch and I think it's getting alot closer. Feels pretty good. So far: 26psi static..17 idle (sputters a hair at startup) FMU is set with 3.5:1 gain. I finally got my shop compressor and it made tuning that FMU a walk in the park. Also had to put a valve on the FMU's signal line to tune. I couldn't get it down far enough with a restrictor.

3.5-1 seems high to me, have you tried turning the fmu down yet? That actualy seems damn high to me for +40's. I would think that 1.5-1 or slightly higher would be more than enough fuel for your setup. Do you have an egt gauge?

[John B]

Quote:

Originally Posted by Phreakish yeah, +40%'s are a bit big from what others have done... +20's probably would have worked better.

Is there an injector between the +20 and +40?

[John B]

Quote:

Originally Posted by BoostedToys Lowered Base fuel pressure to 15 psi

I wish I could do that! What kind of AFPR are you using? Mine will only go down to 25psi.

[Chadxton]

Is your wastegate operating properly? Like, does it pull hard still?


Whitewalls....ewww.

[OmniGuy123]

Quote:

Originally Posted by Geoff 3.5-1 seems high to me, have you tried turning the fmu down yet? That actualy seems damn high to me for +40's. I would think that 1.5-1 or slightly higher would be more than enough fuel for your setup. Do you have an egt gauge?

+1. At 15 PSI, it would be adding 52.5 PSI, add that to your 27PSI static pressure, and you should be able to support way more HP than you could probably make with your current setup. Slowly lowering the ratio of the RRR would probably be the way to go.

[Moparbishi]

how is ur o2 sensor

[BoostedToys]

3.0acclaim...O2 is new.

Cordes...3.5:1 gain (now set to 3:1) is overall. At 20 psi boost I have 60psi fuel pressure

Chadxton... Wastegate works well and the whitewalls...well.. they're as sleeper as you get!

John B... AFPR is stock one modified with the bearing cap method. You are right though...25 psi static (no signal line) 17 Psi @ idle (with signal line).

Geoff... I don't have an Egt. I started at 3.5:1 based on Gus Mahon recommendations (3:1). Have you seen similar setups run much less gain?

[Subliminal]

Man, what a bummer. My van would smoke em with 14 psi. Of course it'd take about 5 mph before they broke loose, but that was on a pretty stock van with a garrett and an NPR.

d

[D-Cal]

You would benefit greatly from a) some dyno time with a wideband, b) a calibration based on the dyno information.

[Geoff]

Quote:

Originally Posted by BoostedToys Geoff... I don't have an Egt. I started at 3.5:1 based on Gus Mahon recommendations (3:1). Have you seen similar setups run much less gain?

Sorry I didn't see this reply. Running a big valve menegon head, ported manifold and a stock garrett(probly flowing close to the same amount of air as you), my stock injectors and stock 1-1 regulator gave me enough fuel for 12psi. If your going to tune with the rrr you really should get an egt gauge so you can safely lower your rate of gain, and I still think you should only need 2-1 or lower. If you want to eliminate any other possible problems try switching back to the stock injectors and regulator and setting boost to 12psi or so. You should be able to smoke the tires up pretty well. Also, at what rpm are you seeing full boost?