Finally got the car dynoed today. The computer hasn't been tuned in a year (since then, 1.6RR's and a new tranny), and I'm still running the 55# injectors on it. The last time it was tuned we had some problems because 2nd and 3rd were dying a slow and painful death. Anyways, for now here are the numbers. Hopefully the guy remembers to email me the graph.

249 RWHP

361 RWTQ (over 350 off of idle )

Not bad for a TBI huh? Should do better after the chip tune. The pulls were real quick back to back to back. Almost no time in between them and it just kept jumping up each time. Who knows, maybe she actually puts out more than that.

 

Here's the graph. Like I said, old chip. Not bad though. . .

 

What are the specs on that "Crane cam?" I wonder if I can get Fast355's dander up if I mention a stock 350 TPI in our club put out 260 RWHP with just 1 3/4" headers and 3" exhaust. And one with Trick Flow heads and a ZZ9 cam put out 330 HP and 370 TQ, automatic trans.

That torque is amazing though, geeeeezz!! Hopefully the better tuned chip will eliminate those spikes at the upper RPMs, too. Way to go!

 

204/214 .429 .452 116
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Like I said, the last time chip tuning was a little bit difficult because 2nd and 3rd were dying. Now they pull all the way through, but it's still a little fat up top.

 

Gunny, good work. I think you still have something holding you back though. You can see it in the dyno. Did you by chance have the wideband numbers that correspond with that run? Another possibility is that your exhaust is still choking you. What size is your headers-Ypipe-Cat-the catback? What type of cat do you have on it. Perhaps you could rig up a back pressure test on your exhaust.

Something is not right for your peak torque to occur at 2,300 rpm with that cam and those heads.

The lobe seperation is a little wide, but that will help with a broader torque band.

 

Not too shabby, I say you only got about 75 HP left in it Seriously though, something is deffinately wrong. Your torque should have held out or even increased untill at least 3000 rpm and then just slowly drop off from there. It looks like your torque is on a down hill run from idle. If you look closely you see a slight jump in power at about 3650, this corresponds to where your VE#2 table comes in, I bet if you look at your bin you'll see that it's not a smooth transition from the VE#1 to the VE#2. A WB would help you out a lot here, also how much timing are you running?

Sorry, I'm not trying to bash your car, you have a tremendous amount of potential in that thing and it's probably something simple holding you back. I don't consider a trip to the dyno a success unless you leave with more questions than answers. It's a tuning tool, and you got some very good indicaters that some big power lurks behind some simple fuel and timing corrections.

Kevin, can you please not start useless banter of whether or not TPI would have made more power quite frankly no one cares and all we would like to do is help Gunny pull the rest of the power out of his combo.

 

I didn't get the wideband numbers on it.

Exhaust is 1 5/8" primaries with a 3" y-pipe, cat and cat-back. The initial assessment was that it was too rich up top which is why it dropped so quickly.
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Yeah, I would definately like to get this thing ironed out. There's no reason why this combo shouldn't make something in the 330-350 hp range and a Kansas flat torque band.

 

Gunny,

Those are awesome numbers. I am hoping that when I get back from the desert I can get my car running that good. Keep up the good work man.

Bill

 

Thanks man. I can definately get more out of it, but it's going to take a couple of hundred dollars in dyno tune sessions to do it. In the metro Atlanta area, it's pretty difficult to get to a place to test and datalog etc. Although the TQ number is impressive, I'm willingly bet I can get more out of it and make it flat to atleast the 4k-4.5k range. The car was never designed to throw down huge HP numbers, it was meant as a torque monster, because it is a daily driver and I rarely get into the RPM range to use big HP numbers.

 

thats awesome, makes me want to drop in a 350 again.

 

Bring it over to Phoenix or fly me over to Atlanta . I find it almost insulting that they didn't give you a A/F graph!

 

Cost more money and I wasn't aware that it was an extra cost. Like I said in up top, it was a wham-bam-thank-you-ma'am kind of dyno pull. It just kept putting up bigger and bigger numbers each time.

 

If it's going to cost that much to dyno tune it, you may want to consider purchasing a WB for yourself. It would save you a lot of time if you had the AFR flatlined at say 12.5 to 1 and your timing in the ball park. You could then just do a couple of baseline runs and then quickly increase or decrease your AFR and timing on following runs untill max power is found. No need to use valuable dyno time just getting the AFR in the ball park, dyno time is best used to find out wheather 12.5 or 12.8 is a better AFR and whether your engine likes 30 or 32 degrees of timing, that kind of thing.

 

By the way guys, here's a video of the dyno pull for ya.

Video - Gunny Highway's dyno pull on old chip. 249 RWHP @ 4750 / 361 RWTQ @ 2300