Just got a "baseline" dyno before mods; Vid inside ... having tranny issues? ---

[alwayscode390]

Just got a "baseline" dyno before mods; Vid inside ... having tranny issues? ---

Here is a short vid of my baseline pull. I wanted to get this before I started adding mods.



http://www.youtube.com/watch?v=JLi-CDM3fEI


Current setup has a KN panel filter, Air Foil, Magnaflow 3" catback, and a Johnson intercooler pump.

I think I am having converter issues. Didn't get a clean run until number 6 ... so it was pretty heat soaked in the vid. The dyno guy couldn't get it to read clean on the RPM scale, and the truck was putting power down sporadically. You can hear the engine lose rpm after getting into the boost in another video I took. Not sure if that is the converter locking/unlocking or what. I also have had a slight shake at 45mph that makes the interior rattle, since I bought the truck (torque converter lockup at low throttle?). Its super smooth everywhere else. Is that another sign of a failing converter? The truck wanted to keep shifting on him, he couldn't get a good WOT pull in one gear.

My front differential is toast, so I took this time to hit up a close 2wd dyno.

Put down 241rwhp/340rwtq ... at 15% loss that's around 285hp/400tq at the engine.

Is that pretty typical numbers for a heat soaked truck? I guess its a little more than the advertised numbers when the trucks were new, and he has 74,500 miles on him.

A/F ratios averaged at 12.01 for the run out the tailpipe, so I was happy to see that.

Of course I didn't bring my Datamaster ... had unexpected laptop issues.

Ill post the speed and rpm graphs later tonight probably, and maybe another vid to show you the dip in RPM I was hearing on the runs after he got into the WOT boost

All in all, the truck seems to be running decent, and it didn't blow up!!! ---

 

[TNPhoon]

Re: Just got a "baseline" dyno before mods; Vid inside ... having tranny issues? ---

Re: Just got a "baseline" dyno before mods; Vid inside ... having tranny issues? ---

I guess its a little more than the advertised numbers when the trucks were new, and he has 74,500 miles on him.

I don't have the knowledge to comment on the status of your truck, however, you're the only person I have ever heard refer to their Sy or Ty as a HE.

 

[alwayscode390]

Re: Just got a "baseline" dyno before mods; Vid inside ... having tranny issues? ---

Re: Just got a "baseline" dyno before mods; Vid inside ... having tranny issues? ---

Lol ... Symon

The ticking sound, and the miss at idle in drive was gone after his beating though!!! Maybe because it was so hot, or just needed to be redlined HAHA ---

 

[Flyin Ryan]

Re: Just got a "baseline" dyno before mods; Vid inside ... having tranny issues? ---

Re: Just got a "baseline" dyno before mods; Vid inside ... having tranny issues? ---

I don't have the knowledge to comment on the status of your truck, however, you're the only person I have ever heard refer to their Sy or Ty as a HE.

Lol was thinking the same damn thing

If you had DM logged the runs you could have pin pointed it to a converter issue but without it and not being there it's a guessing game

 

[Aeroking]

Re: Just got a "baseline" dyno before mods; Vid inside ... having tranny issues? ---

Re: Just got a "baseline" dyno before mods; Vid inside ... having tranny issues? ---

I believe drivetrain lose is closer to 20%.

 

[alwayscode390]

Re: Just got a "baseline" dyno before mods; Vid inside ... having tranny issues? ---

Re: Just got a "baseline" dyno before mods; Vid inside ... having tranny issues? ---

20% would be AWD though, right Brandon?

Here is a vid of the weird hesitation at WOT , and how it shifts itself into the next gear when hes trying to keep it in one gear:

http://www.youtube.com/watch?v=I7BYS1j_IaQ&feature=youtu.be

Whats a 2600 stall going to be like with a stock truck? If it will work fine I may get that installed and see if it clears up the issue. That would be one less thing to install when the heads/cam/turbo setup gets put on ---

Here is the SPEED Graph ... you can see he was going over 100mph , but the dyno graph of the rpm power isn't showing correctly. There is no way he was going that fast at 3700rpm ... plus he hit the rev limiter on that run ... 5200rpm-ish:

The dip is where I think the hesitation hits in the vid on this post. Super weird power output ... showing spikes up to 545 wtq LOL ... something is definitely not right.

Here is the RPM Graph ... as you see it only shows the entire pull being from 3k to 3700 rpm even though it was from around 2500-5200rpm. Another car was dyno'd immediately after I got off with no issues, so it wasn't the dyno ... its something with my truck:

 

[1b rock]

Re: Just got a "baseline" dyno before mods; Vid inside ... having tranny issues? ---

Re: Just got a "baseline" dyno before mods; Vid inside ... having tranny issues? ---

were u happy with pur performance

 

[alwayscode390]

Re: Just got a "baseline" dyno before mods; Vid inside ... having tranny issues? ---

Re: Just got a "baseline" dyno before mods; Vid inside ... having tranny issues? ---

I keep bringing them rare cars that they have never worked on ... so it seems like a learning experience for them a lot of the time.

They always treat me right though.

This is my first issue with a Dyno , and I have brought 4 vehicles to them ... and ran the dyno over 10 different times. Figures it would be the SY to give me troubles LOL. Ive been putting off a dyno for the last 6 years ... thinking it would break , not cause issues.

Atleast it didn't break ---

 

[alwayscode390]

Re: Just got a "baseline" dyno before mods; Vid inside ... having tranny issues? ---

Re: Just got a "baseline" dyno before mods; Vid inside ... having tranny issues? ---

I've been reading old threads, and see that my numbers were actually decent.

I also saw that lots of guys were having dyno issues. Something about the machines not loading our trucks correctly.

Seems like my numbers are in-line with my mods ... and that the rpm graph is actually correct, and is only showing from 3k to 3700 ... but reported the correct numbers. That's sorta strange.

Now, what about that hesitation in the second vid I posted ... I am starting to think my converter/transmission is fine after all that reading. Is that just the converter unlocking around 54mph ... then relocking at 73mph? It looks like he went WOT at 52mph looking at the A/F ratios taking a dip then ---

 

[ItsMyTy]

Re: Just got a "baseline" dyno before mods; Vid inside ... having tranny issues? ---

Re: Just got a "baseline" dyno before mods; Vid inside ... having tranny issues? ---

air fuel seems to be on the scary lean side. that's if the dyno's wideband is correct. that wideband graph looks suspect. it's way too flat

 

[Quickstop [UK]]

Re: Just got a "baseline" dyno before mods; Vid inside ... having tranny issues? ---

Re: Just got a "baseline" dyno before mods; Vid inside ... having tranny issues? ---

Without DM or TP log file, it's nigh on impossible to say what's going on.

How were they measuring RPM? If they were taking it off the shaft/wheels and your TC wasn't locked up, the 3700 number would be wheel RPM perhaps whereas engine rpm would have been higher. If there was trans slippage or the TC was loose, engine RPM does not equal trans input shaft RPM.

2600 stall on a stock turbo would work but you'd be overboosting a lot and would need to make sure your stock wastegate was able to handle it.

How have you determined 2600? The only real way I am aware of is by giving a manufacturer the tq, heads, cam and other info. 2600 rpm in a Syclone would not be the same 2600 TC in a different vehicle. :2cents:

Is it a stock ECM/Prom/chip etc?

Did you try and lock the TC manually or put it in 1 or 2 to prevent upshifting/downshifting?

281/400 is pretty good overall!

When I took mine the first time, the guy declined to run it!

 

[alwayscode390]

Re: Just got a "baseline" dyno before mods; Vid inside ... having tranny issues? ---

Re: Just got a "baseline" dyno before mods; Vid inside ... having tranny issues? ---

The air fuel should be fine around 12.01 ... that's not lean to me. Coming out of the tail pipe is about .5 point leaner than from around the downpipe, so its really probably 11.5 at the downpipe. Its really hard to see on the pics, sorry about that.

The 2600 converter I have is for my turbo swap ... its not installed yet.

This is a totally stock truck besides the 3" catback, KN filter, throttle body air foil, and Johnson intercooler pump.

They were trying to take RPM from the spark plug wire ... once every 750 the guy kept saying.

Im kicking myself in the ass for not having Datamaster with me , but I was already nervous as hell and didn't want anything else getting in my way.

Im thinking everything is ok at this point. I will do some 0-100 Datamaster pulls when I find a good backroad soon.

Thanks everyone ---

 

[alwayscode390]

Re: Just got a "baseline" dyno before mods; Vid inside ... having tranny issues? ---

Re: Just got a "baseline" dyno before mods; Vid inside ... having tranny issues? ---

I was wondering if I have TV cable issues, because I had the Gilbert Propshaft installed and they had to bend the stock bracket to make it fit. It goes into gear fine, but I can tell its a tiny bit off. Once in awhile I have to wiggle the shifter knob to get the button to pop up and lock into OD.

Could this be causing issues?

He tried everything ... but running it in 2nd made it such a FAST pull it wasn't really what we were looking for. ---

 

[It's just a six]

Re: Just got a "baseline" dyno before mods; Vid inside ... having tranny issues? ---

Re: Just got a "baseline" dyno before mods; Vid inside ... having tranny issues? ---

I am not current w/what mods are done to your Sy.

What fuel octane where you running? How much boost?
12.0 is lean if you are running more than stock boost & pump gas IMO.

From the graph, it appears that the wastegate is partially open causing the peak torque to come in late & or you have a catalytic converter , or you have both? Cats really slow down the boost coming in fast or a restrictive exhaust.
Do you have a stock wastegate actuator?

Hesitation most often comes from a weak fuel pump or low fuel pressure, stock fuel pressure regulator?:2cents:
Can you see the A/F ratio when it was hesitating? What did it show?
Any boost pressure graphs of the runs?

 

[alwayscode390]

Re: Just got a "baseline" dyno before mods; Vid inside ... having tranny issues? ---

Re: Just got a "baseline" dyno before mods; Vid inside ... having tranny issues? ---

This is a totally stock truck besides the 3" magnaflow catback, KN filter, throttle body air foil, and Johnson intercooler pump.

93 octane pump gas.

I have a magnaflow cat installed.

It looks like A/F is 12.0 , he punches it and it dips down to 10.0 , then goes back up to 12.0 all within 48-56mph at the beginning of the run. Maybe it just dips because it gets pretty rich for the second or two? ---

 

[alwayscode390]

Re: Just got a "baseline" dyno before mods; Vid inside ... having tranny issues? ---

Re: Just got a "baseline" dyno before mods; Vid inside ... having tranny issues? ---

that wideband graph looks suspect. it's way too flat

That was part of the issue, its only showing the run on the graph from 3100-3700 rpm , and I guess only reporting the A/F during that 600rpm section ... but it reported peak hp/tq numbers outside of the range in the graph. The dyno guy couldn't figure it out, maybe its a software malfunction of the dyno? It worked for the next car that came up though ---

 

[It's just a six]

Re: Just got a "baseline" dyno before mods; Vid inside ... having tranny issues? ---

Re: Just got a "baseline" dyno before mods; Vid inside ... having tranny issues? ---

This is a totally stock truck besides the 3" magnaflow catback, KN filter, throttle body air foil, and Johnson intercooler pump.

93 octane pump gas.

I have a magnaflow cat installed.

It looks like A/F is 12.0 , he punches it and it dips down to 10.0 , then goes back up to 12.0 all within 48-56mph at the beginning of the run. Maybe it just dips because it gets pretty rich for the second or two? ---

Yeah, going as rich as 10.0 is pretty rich & probably is clearing itself out before it starts to run better.

If you put a stiffer wastegate actuator, you are going to feel a difference. But, you should also, use an electronic boost controller, which also helps it spool faster. It can be adjusted so the wastegate stays closed until the last possible moment (to what boost level you selected). IFAIK, the factory computer cannot do these types of adjustments as an aftermarket EBC can do. Just something to think about if you are interested.

 

[alwayscode390]

Re: Just got a "baseline" dyno before mods; Vid inside ... having tranny issues? ---

Re: Just got a "baseline" dyno before mods; Vid inside ... having tranny issues? ---

Awesome ... thanks for the tip.

I have a Greddy B-Spec 2 EBC ... but I was waiting to throw it on with the other stuff.

My build is going to be Ported Big Valve Vortecs, RPM Ported Manifolds, 58mm Throttle Body, RPM Custom Cam, ATR 3" Downpipe, 39mm External PTE Wastegate, Dutchty Lower, Razor Alky kit, Ball Bearing Billet 6262 (or 6266 ...still researching the difference), 60# injectors, 2600 Stall, and a Turbo Tweak chip.

I am hoping for solid 11's , and around 450crank hp. That should get me there , and probably more ... right? I don't want to boost more than 18-20lbs ---

 

[It's just a six]

Re: Just got a "baseline" dyno before mods; Vid inside ... having tranny issues? ---

Re: Just got a "baseline" dyno before mods; Vid inside ... having tranny issues? ---

You should be able to make that power w/your components.
With better flowing heads, you will not need to boost as high as w/the stock heads, they are really restrictive. I went from 21 psi to 24 psi & only gained 10 HP. Torque went up a bunch more though.

Have you run the Sy @ a track? Times?

 

[alwayscode390]

Re: Just got a "baseline" dyno before mods; Vid inside ... having tranny issues? ---

Re: Just got a "baseline" dyno before mods; Vid inside ... having tranny issues? ---

Nope, I never ran it. From reading about our trucks "blowing up" over the years on here , and not being able to read a scan tool for crap ... I never had the balls to take it down the track.

Now that I feel its running healthy enough, I may get it down the 1/4 mile a couple times this summer.

Its 2wd right now though ... I may wait until I get the front differential fixed so I can atleast launch it at the line

I did a "test" Datamaster log a couple months back , and it seemed to be running pretty well ... that's what gave me the courage to finally dyno it.

I will do a 0-100 WOT Datamaster pull when I can find a good back road soon. ---