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shogun32

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how is Lund justifying spinning the engine so far past the redline? There are zero gains to be had past 6500 anyway. Were there upgrades that were not mentioned? Everything has limits. My guess intake restriction. Try pulling the filter element out.
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how is Lund justifying spinning the engine so far past the redline? There are zero gains to be had past 6500 anyway.
My guess would be number of gears required to cross the line. Depending on his tire height, may need the higher revs to stay in 5th when he goes across the finish line. 7800RPM on a 26" tire will go 126 in 5th gear which is right around his MPH for his drag time. Just a guess though
 
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Thanks for sharing. Does Lund believe the car is being held back some how?
My gut says there is a bottle neck somewhere. But, I got no idea what it could be. You are running my dream setup!
Thanks,
How is the car being held back some how?
 
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how is Lund justifying spinning the engine so far past the redline? There are zero gains to be had past 6500 anyway. Were there upgrades that were not mentioned? Everything has limits. My guess intake restriction. Try pulling the filter element out.
I take it you don’t understand all this that well. The car holds the same 500whp for very long. If I shifted at 6500 the car would fall back below into less power. Higher average power down the track = faster times. With the 10R80 it will stay at 500whp all the way down the track. The intake is not a restriction. It’s the same Steeda CJ CAI that Steeda runs on their own car with the same ported CJ manifold and cams. Only difference between their car and mine is ported heads.
 
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Also, just because I revved it to 8300 on the dyno doesn’t mean the car will be shifting that high. I had to rev it out to see where to car stopped making power. Lund has the shifts set for 8000 currently.
 

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shogun32

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Only difference between their car and mine is ported heads.
well there's your restriction then.
If I shifted at 6500 the car would fall back below into less power. Higher average power down the track = faster times.
Max RPM exist for good reasons. You've been assured then that the valve springs and rotating parts are happy to spend 10 seconds at a time well above their factory limits? You've validated that you don't have spring harmonics or valve float at elevated RPM? And an increase of 4454 to 5065 FPM of piston speed has no deleterious effects? I guess since the purpose is to live a 1/4 mile at a time, rebuilding the engine a few times is baked into the budget...
 
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well there's your restriction then.

Max RPM exist for good reasons. You've been assured then that the valve springs and rotating parts are happy to spend 10 seconds at a time well above their factory limits? You've validated that you don't have spring harmonics or valve float at elevated RPM? And an increase of 4454 to 5065 FPM of piston speed has no deleterious effects? I guess since the purpose is to live a 1/4 mile at a time, rebuilding the engine a few times is baked into the budget...
Guess your car has a ton of restrictions then huh?

The cams are designed to run with no upgraded springs hence my title NSR “no springs required” cams. Lol I ran my stock motor 2016 5.0 with twins at 15 psi for over 2 years revving to 7800rpm and ran an 8.9 at 154. . You think I’m worried about an NA motor that revs to 7500 stock to 8000? Nah.
 

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yeah, stepped in it a bit...

I was coming from a point of the factory engine is built to a price unlike say the Boss which has all kinds of upgraded internals to support higher rev duty. Also if dropping $1600 on cams, I don't understand why you wouldn't upgrade the rest of the valve train. Springs are a nuisance cost. Just because the cam profile at 7300 rpm doesn't need springs, it doesn't follow that at 8000+ rpm it won't do bad things.

I get wanting to use the overrun to save a shift or to hold a gear for longer.
 
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Maybe its the version of the NSR cams you’re using or how your CobraJet intake was ported? Take a look at HotRod’s Comp Cams 2018 CAM test results. The final engine Dyno chart shows the HP climbing past 8000 RPM. I couldn’t figure out how to link that particular image. So, skip to the end.
https://www.hotrod.com/articles/ford-coyote-update-new-stage-3-cams-dyno-592-hp/
Cheers,
Those are the same exact cams I have. Mark said on FB that it was an error and they don’t make
Stage 3’s for the gen 3 coyote yet. My cobrajet was ported by Brett barber just like Steeda.
4F8C0D9A-C741-4A8D-95BB-C07ECD01E6EB.png
 
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Slamdcoop0428

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That’s also an engine dyno in the link vs me being on a dyno reading power at the wheels. It’s not going to show power like an engine dyno obviously. Too many variables.
 
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Slamdcoop0428

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yeah, stepped in it a bit...

I was coming from a point of the factory engine is built to a price unlike say the Boss which has all kinds of upgraded internals to support higher rev duty. Also if dropping $1600 on cams, I don't understand why you wouldn't upgrade the rest of the valve train. Springs are a nuisance cost. Just because the cam profile at 7300 rpm doesn't need springs, it doesn't follow that at 8000+ rpm it won't do bad things.

I get wanting to use the overrun to save a shift or to hold a gear for longer.
A gen 3 revs just as high stock for stock as a roadrunner... 7500rpm. Technology is a great thing. Gen 3 (18-20) has gt350 tech built into it just like gen 2 (15-17) have boss 12-13 tech built into them.
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