Where did my "I need help tunning" post go?

[mars]

I was pretty sure I posted that...lol

anyways, I hit the dyno, and was very very un-impressed...



Thats 235 tq. and 203HP at the wheels.

You can obvioulsy see the problem thats occuring here...  heh.

Now during the run, no knock retard occured at all.  I wonder what could cause such a drastic dip there.

If anyone has datamaster, a log of the same chip that was used during the run can be seen here :

http://www.domesticcrew.com/marvin/Cavalier/logs/jULY15.uni

And the actual binary file is here :

http://www.domesticcrew.com/marvin/Cavalier/logs/July15_1.bin

Any help is much appreciated.

[sleeperred90tgp]

That is disapointing for all the work you have done. Don't know much about your SC but if your www is up to date I spoted a couple of things that you might try.

If you are using 3.1 injectors no matter which verity there too small. I would guess with a 3400 and an sc you could use at least 30#. I am up to 36# but havent had a chance to get to the strip.

Pressure regulator. I assume you are trying to tune the injectors with the chip? Thats fine if you have the time. I use a RRFPR@ from 60 to 70# depending on the size injector I am using that week. That #'s works pretty well with 30# injectors to the tune of 13.8's and I think I weight about 1k more than your car and you have .2 lt on me.

Next I think your tires are too narrow espically with a light car. Never ran the bfg radials but did find that Nittos basically stoped my burnouts unless there was water. What was your 60' times.

Your 70mm TB. The machine part will take it with about .06 left on each side. The housing won't take 70mm with out going through or building it up. Make sure that they didn't go through when it was ported.

Is the 3.94 FD ratio with thoes tires.? Man I would love to get that low. Didn't know they made a 5 speed that low.

Just tossing out some stuff. :roll: Good luck.

Jud

[mars]

Umm, I haven't ran the 1/4 lately, I got 8.95 @ 84 in the 1/8 last week though.

The tires hook fine, I was into the 2.040 range.

I am using 30# injectors yes.

The 70mm TB fits well onto my manifold, it's the 3500 upper intake, I bet it can take a 75mm on there no problem.

I just have to figure out the huge dip there, has to be fuel or timing.  or both.

[TurboGTU]

I remember seeing somthing like this also on someones elses superchaged 60*v6. It was Norms Superchaged 3.1. THough his issue was a weak fuel pump and later on a busted worn out SC internal cavilar band (not gear driven!). Might even check to see if the belt to the pully on the crank "slips".

[TurboGTU]

Oh yea..knowlege is golden.

http://www.beretta.net/board/ib3/ikonboard.cgi?act=ST;f=9;t=8;st=0

Pages 1 and 5 are the golden ones. between them is some good info..but cluttered with mama-drama  :lol: . That last few pages is some stories of how well it performs after the mishaps. Don't have any updates since then.

Your setup seems to go thought the same probelms with power. Duble check.

[mars]

I have a Walboro fuel pump in the car already, but I will look at the fuel PSI and make sure it's OK.

[TurboGTU]

So your only running 3-5 psi of boost? Thought you were going to crank up the boost with the new pullie. BTW how was your fuel pressure?


BTW..heres his SC and setup... http://www.gmfwd.com/pn/index.php?name=PNphpBB2&file=viewtopic&t=69&postdays=0&postorder=asc&start=0

[mars]

Alright, I am sure something is messed on that dyno run...

So pretty much just ignore it.

The car pulls hard to 5400, where about then (around 6 psi) it falls on it's face.

I am thinking more and more it's just plain old valve float.  I have stock valve springs...

It does hit 10 PSI at 6K sometimes, but my pulley is just WAY to big for it to work well.  I hope with the smaller pulley boost will come on earlier...

I have the new pulley ready to go on, but the bolt has to be drilled out, and I just wanna take my time on that, and make sure it is done right.  without messing up the threads.

I didnt get the fuel pressure tested yet, but it's on the list.

Another thing I was thinking is maybe the chip tunning is way off.

I noticed that my ignition timing does not retard very much (at all) under boost,  I thought the TGP chip did this by itself, but it's apparent through datalogs that at high RPM, the TGP chip doesn't mess with the ign. retard much.  It keeps advancing the timing for some reason...

Perhaps cause the timing map only goes to 4800 RPM?  I am 1200 over that mark...?!

ANyways, if you have any ideals, lemme know.

Thanks.

[TGPilot]

Be happy you pull above 4500 RPM! My Car and Luke's fall on their faces at 3850 RPM. Nice ramp up and whammo....Straight down to nothin'sville. :wink:

[mars]

Be happy you pull above 4500 RPM! My Car and Luke's fall on their faces at 3850 RPM. Nice ramp up and whammo....Straight down to nothin'sville. :wink:

Whhhhhhhat?  are you serious?  you gotta fix that....   :shock:

[TGPilot]

Only way to fix it would be a different cam, turbo, and intake system all together. The 3.1 has very long intake runners. The longer the runner the better your bottom end torque...but upper RPM breathing is killed.

I am at 280 ft/lbs to the wheels. Any more than that and I will be looking for a 5-speed tranny cause the 4t60 TGP tranny won't handle it! :wink:  :lol:  8)

[mars]

OK, in the first post someone suggested swapping to a smaller pulley,

Well I went from a 95 to an 85mm pulley, and HOLY MOTHER OF GOD, THIS THING IS JUST PLAIN VIOLENT.

Why didn't i swap pulleys beforehand?

Rotrex has a claimed MAX rpm, with my 85mm pulley I hit the max at 5980 RPM, with my old pulley it was something 6600 crank RPM.,

Anyways, now, when i get on the gas I pretty much instantly have 5 PSI, and it climbs to around 12 @ 5500, it fells like the power has increased by 50% with the pulley.  Just AWSOME!

For some reason the blower oil temp stays about 20*F cooler than it did before, which is kind of odd, because it's spinning faster.   :?

Anyways, I have a smile from ear to ear, unlike the SRT-4 driver  that tried to leave me in the dust today,    :shock:  :shock:  :P

And I dont have to rev any higher that 5500 now, cause the power from 3 to 5.5K is just insane, LOL.  

Thanks to all that helped.

[TurboGTU]

SWEEET  8)   :headbang:   :spin: !

[pontiac6ksteawd]

Im lost on this whole thing of you guys falling on your face above 3800 rpm. Is this on your TGP setups or? My TGP is apsolutely miserable to control above 2200 RPM. the torque steer up to redline is enuf to give you a heart attack. I am only wondering whats going to happen when I replace the X-over..

[TurboGTU]

Must be valve float and high boost. ???

The GTU pulled to 6K and wanted more.
My springs are shimed by .02 and of course I have high flow top end.

Im sure after he puts LS6 spings in there it'll buzz to 6K no problem. THough he doesn't need it now... :twisted: