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Old 04-07-2008, 07:46 PM   #21
Italian LX
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Quote:
Originally Posted by triggz View Post
and theres probably another 100+lb-ft of tq to be had without that lean spike..and thats a HOT spike..
That spike is typically caused by the delay of the fuel from the solenoid to the plate. Even though my fuel line is very short, it probably wouldn't hurt to put a longer nitrous line after the solenoid to help delay the nitrous a bit. Either way, the lean spike on that graph lasted less than a second, so it's not as bad as it looks.
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Old 04-07-2008, 07:48 PM   #22
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Originally Posted by 04 Mach1 View Post
How come you only pulled it to 5400rpms???
Not really any more power made above that pull so no point in taking it further. Considering the massive torque down low, it's likely best to shift before 5400 to keep the RPMs where the torque is the highest.
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Old 04-07-2008, 07:50 PM   #23
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Old 04-07-2008, 08:00 PM   #24
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BTW, buy some cheap 90/10s and 175lb c/o's, slicks/skinnies and that thing should go 9s if you can shift fast enough
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Old 04-07-2008, 08:07 PM   #25
Italian LX
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Originally Posted by 96GTS View Post
Holy crap thats awesome!!!! What is your HCI intake and CR again?
Heads: Twisted Wedge Stage 3 (by TEA)
Intake: TFS-R (not the box version)
Cam: Cam Motion Custom ground (603/570 lift)
CR: 10.2:1.
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Old 04-07-2008, 08:14 PM   #26
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Originally Posted by Italian LX View Post
Heads: Twisted Wedge Stage 3 (by TEA)
Intake: TFS-R (not the box version)
Cam: Cam Motion Custom ground (603/570 lift)
CR: 10.2:1.
I take it you changed cams

That's a good bit different lift than what you told me last year
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Old 04-07-2008, 08:15 PM   #27
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Quote:
Originally Posted by Italian LX View Post
Not really any more power made above that pull so no point in taking it further. Considering the massive torque down low, it's likely best to shift before 5400 to keep the RPMs where the torque is the highest.
I agree with the shift point. I was just wondering why it doesn't keep making power to the 6000 mark. Mines the same way kinda. It strong to the 5800 mark but then drops off pretty quick.
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Old 04-07-2008, 08:21 PM   #28
Italian LX
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Quote:
Originally Posted by QWKSNKE View Post
I take it you changed cams

That's a good bit different lift than what you told me last year
The lift increased when I changed to the 1.7RR's. With the 1.6RRs, I believe the lift was 568/536

The weird part is that my peak power dropped 8hp (torque stayed the same)... and the torque curve moved lower into the RPM range -- I would've thought the increased lift would've helped the upper RPM power.
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Old 04-07-2008, 08:26 PM   #29
Italian LX
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Originally Posted by 04 Mach1 View Post
I agree with the shift point. I was just wondering why it doesn't keep making power to the 6000 mark. Mines the same way kinda. It strong to the 5800 mark but then drops off pretty quick.
I'm pretty sure that has mostly to do with the cam I had ground. I asked for a lot of low end torque and I got it.

With the rocker change, I was thinking that if I increased the lift that it would maybe give it a bit more power up top, but apparently I was wrong. I'm guessing the duration has more to do with my lack of top-end power. (I can't remember the numbers off the top of my head.)
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Old 04-07-2008, 08:32 PM   #30
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