New combo is back together: home port 799, EPS cam, ported Fast 90mm
11-11-2011, 01:36 PM
#42
Did a long log and used the VET process outlined on efi live to calibrate the MAF and VE tables.
All I can say is wow! Leaned it out from 10.9 afr to 13.12 (going to put some fuel back in to be safe) on the first retune and talk about waking this thing up....
Torque off idle and a solid pull but above 4k it becomes an animal. First gear has always been about useless on street tires but now without throttle modulation 2nd gear has traction issues too.
First time I nailed it from a ~55mph roll it kicked down to 2nd and it was a back and forth between spinning the 295/50s and pulling like mad.
Going to add some fuel back in and put on the drag radials after work. I can't imagine what it feels like when it's getting full traction.
All I can say is wow! Leaned it out from 10.9 afr to 13.12 (going to put some fuel back in to be safe) on the first retune and talk about waking this thing up....
Torque off idle and a solid pull but above 4k it becomes an animal. First gear has always been about useless on street tires but now without throttle modulation 2nd gear has traction issues too.
First time I nailed it from a ~55mph roll it kicked down to 2nd and it was a back and forth between spinning the 295/50s and pulling like mad.
Going to add some fuel back in and put on the drag radials after work. I can't imagine what it feels like when it's getting full traction.
11-11-2011, 02:01 PM
#44
Could be Sunday if I finish the idle tuning and get the air fuel to a safer area. If not it will be February.
Just don't want to push my luck if it's not close to perfect. Running into issues here are one thing, but running into them at the track an hour and 45 min away is another.
I can't say enough good things about how well the combo works on the street even half *** tuned. For a combo I was expecting to lose some low end grunt with I am still amazed it's become even more of a stump puller.
Glad I wasn't afraid to step up the cam size some.
Just don't want to push my luck if it's not close to perfect. Running into issues here are one thing, but running into them at the track an hour and 45 min away is another.
I can't say enough good things about how well the combo works on the street even half *** tuned. For a combo I was expecting to lose some low end grunt with I am still amazed it's become even more of a stump puller.
Glad I wasn't afraid to step up the cam size some.
11-11-2011, 02:09 PM
#45
Could be Sunday if I finish the idle tuning and get the air fuel to a safer area. If not it will be February.
Just don't want to push my luck if it's not close to perfect. Running into issues here are one thing, but running into them at the track an hour and 45 min away is another.
I can't say enough good things about how well the combo works on the street even half *** tuned. For a combo I was expecting to lose some low end grunt with I am still amazed it's become even more of a stump puller.
Glad I wasn't afraid to step up the cam size some.
Just don't want to push my luck if it's not close to perfect. Running into issues here are one thing, but running into them at the track an hour and 45 min away is another.
I can't say enough good things about how well the combo works on the street even half *** tuned. For a combo I was expecting to lose some low end grunt with I am still amazed it's become even more of a stump puller.
Glad I wasn't afraid to step up the cam size some.
11-11-2011, 02:13 PM
#46
Haha, he'll get a taste I'm sure but I'm gunning for his little brother's pullied bolt on tuned Cobra (440rwhp at House of Boost in MO). From a dig at the track I was within .15 of him before so I'd say that's covered. But I would like to try a highway pull even though it's not in my best interest. His car is still IRS and he has an amp/sub so I expect he might weigh more than me. I could always run him until he heat soaks LOL.
There's also a pesky 351w fox body (afr heads and race gas motor), he runs 10.2s on nitrous but only 11.8s N/A. He thought I was hiding nitrous on my old setup...he will be in for a surprise with this one if I catch him off the bottle.
There's also a pesky 351w fox body (afr heads and race gas motor), he runs 10.2s on nitrous but only 11.8s N/A. He thought I was hiding nitrous on my old setup...he will be in for a surprise with this one if I catch him off the bottle.
Last edited by thunderstruck507; 11-11-2011 at 02:22 PM.
11-11-2011, 02:25 PM
#47
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Nice cam choice, I am running the same EPS 230/238 though mine has one degreee difference on the ICL and 0.60X on both intake and exhaust. I absolutely love the cam, definitely pulls like a raped ape to 6,600 RPM... I currently shift at 6,800. I am running TSP stage 2.5 5.3L heads which probably flow about the same as your hand ported 799's. Makes somewhere in the neighborhood of 450rwhp through a 6-sp.
11-11-2011, 02:34 PM
#49
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Nice build. I just picked up a set of 799 heads and am going to port them myself. I will probably be going with the same cam in my T/A. I had a 230/236 cam in my old SS and it was a solid performer. Im looking to go slightly bigger this time. I look forward to seeing some track results from your Chevelle. It should run 11's easily.
11-11-2011, 02:40 PM
#50
Last time out was the day after his tune. He was on drag radials but trying not to break the IRS so he was going 12.0@118mph. Same day his brothers 5.0 went 12.8@111mph. That was the night I was running 12.2-12.3@108 (down from 111mph) and knew something in my motor was fucked. It was falling off hard top end. 1/8th mile was still 7.7@90mph.
The guy who did my heads has a ported blower, pullied, off road exhaust, 3.73 solid axle Cobra with an email tune. It spun a lot even on MT DR but was trapping like 124-125mph.
I'm just trying to keep up haha....
My previous personal best was 12.24@110.38 mph in 1840ft DA with a 1.7760ft. And even that was after the car had seemed to start feeling a little lazy in the upper RPMs. I expected it to trap 112-113mph pretty easily.
Considering how much stronger the car feels both down low and up top, I should haven't much trouble blowing those old times out of the water.
The guy who did my heads has a ported blower, pullied, off road exhaust, 3.73 solid axle Cobra with an email tune. It spun a lot even on MT DR but was trapping like 124-125mph.
I'm just trying to keep up haha....
My previous personal best was 12.24@110.38 mph in 1840ft DA with a 1.7760ft. And even that was after the car had seemed to start feeling a little lazy in the upper RPMs. I expected it to trap 112-113mph pretty easily.
Considering how much stronger the car feels both down low and up top, I should haven't much trouble blowing those old times out of the water.
02-20-2012, 08:12 AM
#52
TRACK RESULTS:
DA 534ft
slight head wind
mid 50s and sunny
first day track was open, fairly slick
1.71 60ft
4.89 330ft
7.57 1/8
91.61 1/8 mph
9.92 1000ft
103.26 mph
11.94 1/4
111.39 mph
1-2 shift: 6600rpm
2-3 shift: 6500rpm
325/50r15 MT drag radials
I think the lower 60ft (off idle launch) is a good sign the car picked up some low-mid grunt. I tried the rest of the day to launch off the converter but traction was hard to find all day.
Thoughts?
DA 534ft
slight head wind
mid 50s and sunny
first day track was open, fairly slick
1.71 60ft
4.89 330ft
7.57 1/8
91.61 1/8 mph
9.92 1000ft
103.26 mph
11.94 1/4
111.39 mph
1-2 shift: 6600rpm
2-3 shift: 6500rpm
325/50r15 MT drag radials
I think the lower 60ft (off idle launch) is a good sign the car picked up some low-mid grunt. I tried the rest of the day to launch off the converter but traction was hard to find all day.
Thoughts?
02-20-2012, 08:34 AM
#53
If I remember correctly, in the past your were running on street car day when track prep was not very good. Was that the case today?
Also, you had said your your rear suspension was bound up with some Lakewood traction bars and that you could not take them off because your wheel backspacing was wrong and your tires would rub if your suspension travel was restored. Unless you have addressed that issue, there is not much you can do other than optimize your tire pressure and pull off your front sway bar.
Also, you had said your your rear suspension was bound up with some Lakewood traction bars and that you could not take them off because your wheel backspacing was wrong and your tires would rub if your suspension travel was restored. Unless you have addressed that issue, there is not much you can do other than optimize your tire pressure and pull off your front sway bar.
02-20-2012, 08:51 AM
#55
When I first put my car together, it was going 11.70s in 113s. It is going 11.30s in the 117-118 range now. So, I would say your MPH matches your ET. Our cars will not have the big MPH to ET ratios that the Vettes or F-Bodies will because our aerodynamics suck.
Mine weighs 3725 with me in it. What does yours weigh again?
Mine weighs 3725 with me in it. What does yours weigh again?
02-20-2012, 09:12 AM
#56
I want to take it to get an accurate weight on certified scales but best guess I have is that I crossed the dairy truck scales at 3820lbs with me, nearly full tank, sub/tools in trunk.
Sub weighs 40lbs, tools about 20lbs. Raced with about the same fuel, so it should be in the area of 3750lbs.
Sub weighs 40lbs, tools about 20lbs. Raced with about the same fuel, so it should be in the area of 3750lbs.
02-20-2012, 09:19 AM
#57
The differences between my combination and yours are compression, CNC head flow and intake flow. Our weight and aerodynamics is similar.
Hard to say how much is left in your tune, but I bet you can get another full tenth out of your 60' with some suspension love.
Anyhoo. Welcome to the 11s!
Hard to say how much is left in your tune, but I bet you can get another full tenth out of your 60' with some suspension love.
Anyhoo. Welcome to the 11s!
02-20-2012, 02:00 PM
#59
I couldn't see your rear suspension on the launch, but on the burnout she looked stiff as a board. Car sounds good though. Your 2-3 shift sounds lower than 6500. My car does not pick up much ET when I stretch out the gears, but it will pick up 1 -2 MPH going from 6200 to 6600 shifts.
02-20-2012, 02:34 PM
#60
I will look at all the other videos I have and find one that shows more of the car on launch. But yes it is stiff. Launch RPM sounds low to me too, I remember that pass I was going to try an aggressive roll in instead of hitting it hard.
It all happened in an instant but it felt like I started rolling in hard, felt it was biting but it was pulling hard and my foot was lifting a little before I caught what I was doing and then went WOT all in an instant.
With traction and playing with a more aggressive launch, the combo is capable of a low 1.6 60ft I think.
It all happened in an instant but it felt like I started rolling in hard, felt it was biting but it was pulling hard and my foot was lifting a little before I caught what I was doing and then went WOT all in an instant.
With traction and playing with a more aggressive launch, the combo is capable of a low 1.6 60ft I think.