Calling the n/a experts, Cams and Long Tubes?
#1
Team Mustang Source
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Calling the n/a experts, Cams and Long Tubes?
I was just wondering if one runs say stage 3 or 4 cams, gets the heads ported and does long tubes if it is still safe to run 100 shot of n2o? I know that with the proper tune, blah blah blah...
and if one goes this route what e.t. can be expected without weight reduction, etc. And rwhp?
I appreciate your time, I am looking at alternatives to power adders, mainly Turbos.
- Jesse
and if one goes this route what e.t. can be expected without weight reduction, etc. And rwhp?
I appreciate your time, I am looking at alternatives to power adders, mainly Turbos.
- Jesse
#2
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You nailed it, the tune would be everything. I'd say with a 100 shot you're pushing it. Our bottom ends are weak at about 450rwhp +. With LT's cams and ported heads you should be up above 350rwhp (that's a complete estimate), so add a 100 shot from N/X, and you'd be around 450 at the wheels. If you have a great tuner, he could probably work out the lean spike, but he'd have to be a really good tuner. My buddy blew up his bottom end due to not being able to work it out. Made a few dyno passes and disaster ensued. Pictures upon demand. I can get you a stand alone fuel system and then you wouldn't have to worry about a lean spike and help from blowing up your bottom end. On top of that this system would support all the nitrous you could throw at it. I would really look into N/X plate kit for the 3v's. I was there last week and their plate kit looks amazing. I'd say if you do all that and get a dead on tune you SHOULD be alright.
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#5
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Has anyone done tests on the 3V camshafts?
Several people on Modular depot did tests on the 2V cams (I believe MMFF also did tests) and the best cams to get were the Stage 1 cams since they boosted hp/torque at the RPM regions where you'd normally operate in while drag racing. Stage 2 cams were pushing it and you lost even more low end torque. As you progressed to Stage 4 cams, you lost a LOT of low end torque and the boost in hp/tq came at the very high end region (6000+ RPM) making it quite useless for a daily driver and less than useful for an engine with stock internals.
Several people on Modular depot did tests on the 2V cams (I believe MMFF also did tests) and the best cams to get were the Stage 1 cams since they boosted hp/torque at the RPM regions where you'd normally operate in while drag racing. Stage 2 cams were pushing it and you lost even more low end torque. As you progressed to Stage 4 cams, you lost a LOT of low end torque and the boost in hp/tq came at the very high end region (6000+ RPM) making it quite useless for a daily driver and less than useful for an engine with stock internals.
#7
Legacy TMS Member
Here's the direct link: http://www.brenspeed.com/tech/compcams.html
It looks like you lose quite a bit of torque until 5000 RPM, when it crosses over (Stage 3 produces more torque from this point on). I see the same trend with horsepower. The stock cams produce more hp and torque up until ~5000 RPM. Assuming the 4.6 3V uses the same stock crank as the 4.6 2V, it is balanced to 6200 RPM and anything faster is playing with fire.
I would like to see Stage 1 and 2 cam data before considering the Stage 3 cams for my car. If the trends are the same as the Comp Cams 2V cams, then the Stage 1 cams would lose less low end torque/hp than the Stage 3, while providing noticeable gains above 3000-4000 RPM, allowing 2000 RPM of playtime with more hp/torque versus 1200 RPM.
It looks like you lose quite a bit of torque until 5000 RPM, when it crosses over (Stage 3 produces more torque from this point on). I see the same trend with horsepower. The stock cams produce more hp and torque up until ~5000 RPM. Assuming the 4.6 3V uses the same stock crank as the 4.6 2V, it is balanced to 6200 RPM and anything faster is playing with fire.
I would like to see Stage 1 and 2 cam data before considering the Stage 3 cams for my car. If the trends are the same as the Comp Cams 2V cams, then the Stage 1 cams would lose less low end torque/hp than the Stage 3, while providing noticeable gains above 3000-4000 RPM, allowing 2000 RPM of playtime with more hp/torque versus 1200 RPM.
#8
Here's the direct link: http://www.brenspeed.com/tech/compcams.html
It looks like you lose quite a bit of torque until 5000 RPM, when it crosses over (Stage 3 produces more torque from this point on). I see the same trend with horsepower. The stock cams produce more hp and torque up until ~5000 RPM. Assuming the 4.6 3V uses the same stock crank as the 4.6 2V, it is balanced to 6200 RPM and anything faster is playing with fire.
I would like to see Stage 1 and 2 cam data before considering the Stage 3 cams for my car. If the trends are the same as the Comp Cams 2V cams, then the Stage 1 cams would lose less low end torque/hp than the Stage 3, while providing noticeable gains above 3000-4000 RPM, allowing 2000 RPM of playtime with more hp/torque versus 1200 RPM.
It looks like you lose quite a bit of torque until 5000 RPM, when it crosses over (Stage 3 produces more torque from this point on). I see the same trend with horsepower. The stock cams produce more hp and torque up until ~5000 RPM. Assuming the 4.6 3V uses the same stock crank as the 4.6 2V, it is balanced to 6200 RPM and anything faster is playing with fire.
I would like to see Stage 1 and 2 cam data before considering the Stage 3 cams for my car. If the trends are the same as the Comp Cams 2V cams, then the Stage 1 cams would lose less low end torque/hp than the Stage 3, while providing noticeable gains above 3000-4000 RPM, allowing 2000 RPM of playtime with more hp/torque versus 1200 RPM.
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