Let's talk exhaust and Prochargers.
Thread Starter
Joined: Nov 2001
Posts: 10,813
Likes: 15
From: Doylestown PA
Here's a blast I did last weekend doing some tuning. As you can see, I'm still a little rich, so that is getting addressed a little each time I tune. I don't really want to overshoot it too much. I've noticed that the wideband and fuel pressure jump around a little bit, but I've heard that's normal and to take the average as opposed to a single value.
Here's what my run looked like in Hptuners:
You can see where my traction control actually kicked in at the top of 3rd, that's why everything dips for a second. It's not belt slip, it's tire slip.
It should make a difference. Probably won't see many gains up top but the mid range will be a lot better. Should drop boost a little so that's a good thing because you'll drop boost, gain power, and have less heat.
Brien my exhaust actually steps from 3" down to 2.5 after the "heat zone" Off the headers it is ovaled 3" pipe and through my x-pipe it is 3" but after the x I stepped down to 2.5". It made over 600rwhp and 560ft.lbs at 10psi with 1-3/4" pacesetter Lt's. I have been gathering parts to build my own kooks type exhaust and go all 3" over the axle as apposed to under the axle that I have now, I think you will notice a gain by going 1-7/8" and a larger exhaust but I'm not sure it will be worth the money to pick up 30-40 more hp
Impressive. If I had to guess, I'd say I'm around 675-700rwhp and 575-590rwtq. My heads are pretty decent, far better than factory heads, but how much better, who knows.
Here's a blast I did last weekend doing some tuning. As you can see, I'm still a little rich, so that is getting addressed a little each time I tune. I don't really want to overshoot it too much. I've noticed that the wideband and fuel pressure jump around a little bit, but I've heard that's normal and to take the average as opposed to a single value.
Here's what my run looked like in Hptuners:
You can see where my traction control actually kicked in at the top of 3rd, that's why everything dips for a second. It's not belt slip, it's tire slip.
Here's a blast I did last weekend doing some tuning. As you can see, I'm still a little rich, so that is getting addressed a little each time I tune. I don't really want to overshoot it too much. I've noticed that the wideband and fuel pressure jump around a little bit, but I've heard that's normal and to take the average as opposed to a single value.
Here's what my run looked like in Hptuners:
You can see where my traction control actually kicked in at the top of 3rd, that's why everything dips for a second. It's not belt slip, it's tire slip.
Might be a stupid question but how are you monitoring fuel pressure?
And what logic are you using to gauge horsepower off the data logs?
Thread Starter
Joined: Nov 2001
Posts: 10,813
Likes: 15
From: Doylestown PA
I'm not basing hp on logs per say. My car made 455rwhp before h/c, and now with 15psi of boost, it's safe to say I'm north of 600rwhp. How much north I don't know. I've seen other guys post their dyno numbers with less boost and made 650rwhp, so who knows.
Honestly, I love driving my car. Puting it on the dyno would be simply to ensure the afr is correct for me. If it puts down 600rwhp, it's still just as much fun to drive. If it puts down 700rwhp, everyone will scream bullshit and prove it at the track, which doesn't interest me either. So what's the point? Who's to say I haven't dyno'd it and don't want to post numbers...
I will say this, that third gear blast was from 42mph to 104mph in just over 5 seconds, 5.13 seconds to be exact. That's from 2760 rpm to 6735 rpm in third. That's pretty quick in my book, but I bet the 3.40" pulley would be a little quicker
Last edited by The Alchemist; Jul 12, 2013 at 08:19 PM.
Nice
I have pretty much the same setup as you and now have at I around 15psi. I have yet to dyno as I am finishing up the tune but would love to see the dyno number once. I Mainly just love working on and driving the car.
I will have to look at my next log and check my 3rd gear pull and see how quick it is. I know it's rediculas.
I have a autometer fuel gauge with a sensor hooked up just like yours but wasn't sure if that style sensor could be hooked into the data logger or not. I guess I will have to research that.
I have pretty much the same setup as you and now have at I around 15psi. I have yet to dyno as I am finishing up the tune but would love to see the dyno number once. I Mainly just love working on and driving the car.
I will have to look at my next log and check my 3rd gear pull and see how quick it is. I know it's rediculas.
I have a autometer fuel gauge with a sensor hooked up just like yours but wasn't sure if that style sensor could be hooked into the data logger or not. I guess I will have to research that.
Thread Starter
Joined: Nov 2001
Posts: 10,813
Likes: 15
From: Doylestown PA
I've done the drag racing thing in the past for the first 2-3 years of owning the car. I broke differentials, clutches, caused damages inside the transmission, all trying to get a 11 second slip na. I did get my 11.78 @ 119mph, but I broke too much crap along the way, so the pleasure was quickly diminished.
Just like StaleyP said, I just love driving and working on my car, having plenty of power just adds to the enjoyment.
Honestly, I have had some desire to run it at the strip, but honestly, first 10-second pass and I'd pack up and be happy. I don't have a cage, so unless it was a rental, I doubt they'd let me back on anyways.
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you baby her too much alchemist. drive it to the strip. make a couple hits and drive it home. that should be a goal. id get tired of blowing the tires off all the time. id wanna feel a fulll pass. you dont even have to run the 1/4 you can run an 1/8 run and shut her down and weigh it and find out where you are at and get a better idea of what your capable of. knowledge is power.
I'm with you on not into the drag strip stuff all the time but I had to know how it ran. I did break it the first time out but luckily it was only a axle. Fixed it and waited for some nice weather then brought it back. I was apprehensive but after a few test passes I gave I hell and it ran a lot better than I expected with a bum clutch.
I plan on taking it back in the fall/winter with a new clutch and see if it will get 9's since its so close. After that's done i'll go back to crushing the streets and taking turns cause that's what I enjoy more.
I plan on taking it back in the fall/winter with a new clutch and see if it will get 9's since its so close. After that's done i'll go back to crushing the streets and taking turns cause that's what I enjoy more.
Thread Starter
Joined: Nov 2001
Posts: 10,813
Likes: 15
From: Doylestown PA
you baby her too much alchemist. drive it to the strip. make a couple hits and drive it home. that should be a goal. id get tired of blowing the tires off all the time. id wanna feel a fulll pass. you dont even have to run the 1/4 you can run an 1/8 run and shut her down and weigh it and find out where you are at and get a better idea of what your capable of. knowledge is power.
I'm with you on not into the drag strip stuff all the time but I had to know how it ran. I did break it the first time out but luckily it was only a axle. Fixed it and waited for some nice weather then brought it back. I was apprehensive but after a few test passes I gave I hell and it ran a lot better than I expected with a bum clutch.
I plan on taking it back in the fall/winter with a new clutch and see if it will get 9's since its so close. After that's done i'll go back to crushing the streets and taking turns cause that's what I enjoy more.
I plan on taking it back in the fall/winter with a new clutch and see if it will get 9's since its so close. After that's done i'll go back to crushing the streets and taking turns cause that's what I enjoy more.
Part of the issue is just the lack of time. My wife has a crazy busy work schedule, we have 2 kids, 5 and 6 years old, so finding a day to run to the track is tough. I have just as much fun rowing through 2,3 and 4 gear on back roads.
That's very understandable. I would also have to know (if I were you) what it puts down but if you've done that already that's great. Going to a 3.4 from a 4.0 will net some nice gains. I want to go down a size or two but a 4.0 would be pushing it for me.
Curious, sure. But here in lies the problem. I don't have a trailor, so I'd have to drive it to and from the track, and honestly, I really don't want to break the car. So if I baby it out of the hole, and don't shift it like I hate the car, then I'll never get a true number out of it. So then it becomes a slippery slope. Say first time out, I baby it, get a 2.0 60', short shift the car, granny shift, and run a 11.0 @ 130mph, so the next run I push it a little and get a 1.8 60', shift it higher, and a little faster, and get a 10.5 @ 133, great. But there's still more in it, so instead of launching at 2000rpm, I go up to 2500rpm, and instead of shifting at 6500, I go up to 7000 and this time I pop the rear or damage something else, and now I gotta get a tow home.
I've done the drag racing thing in the past for the first 2-3 years of owning the car. I broke differentials, clutches, caused damages inside the transmission, all trying to get a 11 second slip na. I did get my 11.78 @ 119mph, but I broke too much crap along the way, so the pleasure was quickly diminished.
Just like StaleyP said, I just love driving and working on my car, having plenty of power just adds to the enjoyment.
Honestly, I have had some desire to run it at the strip, but honestly, first 10-second pass and I'd pack up and be happy. I don't have a cage, so unless it was a rental, I doubt they'd let me back on anyways.
I've done the drag racing thing in the past for the first 2-3 years of owning the car. I broke differentials, clutches, caused damages inside the transmission, all trying to get a 11 second slip na. I did get my 11.78 @ 119mph, but I broke too much crap along the way, so the pleasure was quickly diminished.
Just like StaleyP said, I just love driving and working on my car, having plenty of power just adds to the enjoyment.
Honestly, I have had some desire to run it at the strip, but honestly, first 10-second pass and I'd pack up and be happy. I don't have a cage, so unless it was a rental, I doubt they'd let me back on anyways.
What are your next plans with the bird?
