ralliartist

269 with an aggressive toon sounds about right. Did you use meth? What mix? And do you still have the ls4 throttle body? How do you like it for daily driving?

Axle Man

yes meth. mix was 70/30, TB was not bad at all

ralliartist

that sounds very achievable.

I need to hit the dyno myself and see what I'm putting out.

Zach06CobaltSC

Yes I used an sae correct dyno, dynojet. With methanol injection, 24 degrees of timing, and reving to I believe 7,000 rpms even almost was putting me at 280whp. Depending on where the cut off was, 6800rpms to 7200rpms depended on the whp.

Car has been very well maintained and the tune has been worked on by some of the best.

Could the numbers be inflated from the dyno? sure. But I am just sharing with you what I know and where I am currently at on that specific dyno.

Dyno's shouldn't be used as an exact number by any means, they should be used to make sure what you are doing is making gains, and not losing hp.

But timing up to 25 degrees really can do quite a bit for these cars.

Axle Man

what do u run in the 1/4? with ur set-up i ran a 13.40@105.5 on 555's

ralliartist

what were your uncorrected numbers?

Zach06CobaltSC

I am not sure off the top of my head, I will have logs and printouts on tuesday after my 30mins of dyno time though. With and without the spray. I will probably get in about 8 pulls at least. Hopefully I will have my tune finalized before its on the dyno and just ready to be sprayed.

ralliartist

that's pretty good, I was gonna say, I don't think he's putting out as much power as me and I trapped 104 on 26" tall Mickey's, after seeing what you ran, I'm pretty sure he isn't since your mods list is very similar to his.

Zach06CobaltSC

And I will of course be posting the logs, and the dyno sheet for "proof", even though I don't need to prove anything to anyone lol.

Yay for doing this on my blizzack's and 16inch steelies lol. Believe it or not they really do fit without rubbing on the eibach sportlines.

ralliartist

I would say you are probably in the high 250whp - low 260whp range and that you are probably going to be just shy of 300whp on the spray. Now that's uncorrected (meaning actual whp).

SAE corrected, you'll probably have numbers over 300.

Axle Man

ya that was only a 2.1 60ft. time

my mods were full 3", meth(70/30) mix, injen intake, 2.8", 60's, and the nittos were 1 day old which is y i only cut a 2.1 ur suppose to give them 500 miles to break i. new mods are 3" intake, ls4 TB, TTR motor mount, koni's, drag bags, 70/30 mix and hoping for 13.10's or lower with a 2.0 60 ft.

agreed. track times say all

ralliartist

track times and trap speeds are definitely more telling than dyno numbers.

lsjwannabe

iTrader: (1)

SAE correction usuually lowers numbers a bit, he just has a happy dyno.

Zach06CobaltSC

can you see if my hptuners was shipped yet?

update - hptuners mpvi pro just arrived, woot.

Update - currently sitting in hardees parking lot out in the middle of nowhere with internet connection ROFFLE. I can't believe hardees has wifi. I am in my car, "learning fuel trims".

I do have a code it is as follows.

[PCM] P0172 - Fuel Trim System Rich Bank 1 (Pending) (Immature)

Probably something to do with the..hmmm tune? LoL. Working on getting it as stable as possible. I want to knock off a few degrees of timing because I was noticing slight KR when I wasn't shifting.

Also to note, I realized either my 1st to 2nd shift is bad, or it's just generally harder on the tranny. I don't see knock on my 2nd to 3rd, or 3rd to 4th, or 4th to 5th shifts, but from 1st to 2nd I see a very small amount of knock at times.

I am sure poly mounts would solve that, but thats a different issue. This is so cool.

I currently have running, my cell phone charger, my gps system, my radar detector, a power inverter with my laptop plugged into it, yay for high amp fuses lol.

I am going to have a million questions on the hptuners forums here shortly lol.

hungryhip-ccp

iTrader: (2)

complete opposite... causes false knock dont worry about the kr on shifts dont pull timing for it and dont worry about kr in second gear as long as its not there in third... your throwing the p0172 cause cruising afr is off either your maf calibration or your ve needs work

you do third gear pulls to see if kr is an issue... second and first will have false knock at times and cannot be trusted

Zach06CobaltSC

Great thanks for the information. I know sometimes with my current tune that cruising at 75 up a hill I will have some knock. I am assuming this is because no meth is spraying and I am at like almost 0 boost. It's probably because I have to much timing, but I don't understand why its uphill only and not on flat, or acceleration to that point.

I am really tired so I will probably be doing most of the work on this tomorrow, and I believe tuesday is the dyno stuff.

hungryhip-ccp

iTrader: (2)

my car does that too but it goes away after a sec or two... dont worry about that or i wouldent anyways knock under light throttle wont hurt anything its not good but its not bad either if that makes any sense

Zach06CobaltSC

I am currently working on the tune. I don't know as much as hptuners as I should yet, but I am learning. I need to learn how to richen up a tune, and lean out a tune. Thanks guys. Need to get my tune rock solid before tuesday lol. Also, I need to figure out how to advance the timing and lower the timing. Other then that, the tune should be doing well so far.

So it looks like to richen up a car, you mess with the Power Enrich Fuel Multiplier vs RPM.

When I have it set at 1.235 across the board my af/r is really lean, like high 12s to low 13s.

When I set it to the following.
1.13672 1.13672 1.13672 1.13672 1.13672 1.13672 1.13672 1.13672 1.13672 1.13672 1.13672 1.38867 1.39160 1.39355 1.39551 1.39551 1.39746 1.39844 1.40332 1.40625 1.40625 1.40625 1.40625 1.40625 1.40625 1.40625 1.40625 1.40625 1.40625 1.40625 1.40625 1.40625 1.40625

So 0 rpm to 2500 rpm is 1.13672 then starting at 2750 rpms it starts to raise, at 4750rpms it hits the max of 1.40625 all the way up to 8k rpms. My redline is set at 7200rpms. I generally shift anywhere from 6800-7000.

What do you guys use for limiting boost in 1st gear? Or should a driver just learn how to control it and keep it at 100%?

Let me know guys thanks, also if anyone knows what I am talking about, let me know if I am going about this the right way.

I dont think the Power Enrich Fuel Multiplier vs RPM should be set to 1 specific number. Doing this would result in just 1 specific afr correct?

Changing it as the rpms raise would dump more fuel in as you get into the higher rpms. Hopefully thats right.

I am going to try it and see how it goes, wish me luck.

well, what I did worked. I changed the Power Enrich Fuel Multiplier vs RPM and its now getting back to the richer side.

How rich do we want it is the question. What would be considered safe and conservative. I am thinking 11.4-11.6 ish conservative. Let me know your guys opinions.

Tennpenn83

For the boost limiter in 1st gear, go to engine/torque management/supercharger.

look in the middle column under max boost 1st gear. stock it should read 100% all the way across, go ahead and lower it to where you want it. mine is currently set from 50% at 4k increasing to 95% at 6500 and up.

you pretty much got the right idea with your tuning. i see you have a wideband, and that will prove to be your best friend in tuning. 11.4-6 is pretty safe, but with you running meth, you could still have a lot of room to work with, going leaner and still being safe

Zach06CobaltSC

Great, thanks for all of the input. I will post a screenshot of hptuners with some random information later if you guys want. I don't really know what you guys might wanna know, besides the dyno stuff when I run the 35 and or 50 shot. But if anyone wants to know anything let me know.

Looks like its hard to get my iat2's over 100 today lol. Gotta love the colder days and methanol =D.

hungryhip-ccp

iTrader: (2)

to get a desired afr under pe you need to do the following: say you want a 11.7 you need to go 14.64/11.7=1.25 should be entered in the area's you want to be 11.7 and so on...

to do timing you need to enter in through engine>spark>high octane... but remember be conservative and do a histogram to see what cells you hit on wot runs then adjust those cells accordingly... that way your not +/- the whole table

you just got hpt give it time, no one taught me it took me about 5-6 night staying up late just simply messing with the program, and also remember in the bottom of each open tab as you move the cursor over items it will tell you what they do and what there max and min are

if you go on hpt forum and post lots of questions and seem like you dont know what your doing know one will even respond... trust me lol you have to know what your doing first then ask specefic questions... if you though this forum was bad wait till you start posting on hpt

ralliartist

This forum is BY FAR the easiest on newbs. If anyone thinks this forum is bad, then they either haven't driven a fast car and been part of a online community of fast cars, or they are just idiots.

Sometimes I get frustrated with some of the ******* newbies that we get on here.

Axle Man

ralliarst who would this comment be directed towards?

cobalt ss/sc

hey do you have a dyno graph that you could post up here?? if not where's ur motor peak at?

Axle Man

tq. should be around 4400 hp i would venture to guess a little after