700hp?
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Lethal performance and whipple offer a kit that will get you better than 600 at the crank on a 6.2. And from what I've seen it's has no mods other than a tune , a thermostat , and a blower. And they are making a butt load more low end torque compared to roush and edlebrock.
A set of cams, phaser kit and some head work should easily get it over 700 hp at the crank.
A set of cams, phaser kit and some head work should easily get it over 700 hp at the crank.
Last edited by geabis; Jun 1, 2012 at 01:46 PM.
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my friend just did his 6.2 Raptor with Roush blower and full Stainless Works exhaust made 475/500tq to the wheels in 4th on 9PSI.... and its a BEAST!!!!
these trucks dont dyno much due to 37 in tires and tranny think its bout a 30% loss
these trucks dont dyno much due to 37 in tires and tranny think its bout a 30% loss
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Joined: Apr 2012
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From: Northern MN
I really don't think 700hp is too much of a stretch honestly. With about 13psi I would think 6.2L could pull it off, just need GOOD gas and have cash sitting aside encase you need to build a short block. With 8 psi, 92octane, and a safe tune the 6.2L should be in the 575 crank HP range.
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Originally Posted by rancherlee
I really don't think 700hp is too much of a stretch honestly. With about 13psi I would think 6.2L could pull it off, just need GOOD gas and have cash sitting aside encase you need to build a short block. With 8 psi, 92octane, and a safe tune the 6.2L should be in the 575 crank HP range.
Whipple is putting down 545 hp and 515 ft/lbs at the rear wheels. On 91 octane and 8.5 psi. That's over 600 at the crank.
With some mild mods 700 is well within the picture without major component changes.
Hennessy is doing major internal changes on their twin turbo 800 hp kit to bring all that hp together at 6 k+ rpm. It's also $55k for their setup. $8k=600+hp. Or $55k=790hp. Not to mention the whipple is putting much more torque down at the lower rpms and Hennessy is pretty much stock tq and hp under 3k rpm.
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Joined: Apr 2012
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From: Northern MN
On the 6.2.
Whipple is putting down 545 hp and 515 ft/lbs at the rear wheels. On 91 octane and 8.5 psi. That's over 600 at the crank.
With some mild mods 700 is well within the picture without major component changes.
Hennessy is doing major internal changes on their twin turbo 800 hp kit to bring all that hp together at 6 k+ rpm. It's also $55k for their setup. $8k=600+hp. Or $55k=790hp. Not to mention the whipple is putting much more torque down at the lower rpms and Hennessy is pretty much stock tq and hp under 3k rpm.
Whipple is putting down 545 hp and 515 ft/lbs at the rear wheels. On 91 octane and 8.5 psi. That's over 600 at the crank.
With some mild mods 700 is well within the picture without major component changes.
Hennessy is doing major internal changes on their twin turbo 800 hp kit to bring all that hp together at 6 k+ rpm. It's also $55k for their setup. $8k=600+hp. Or $55k=790hp. Not to mention the whipple is putting much more torque down at the lower rpms and Hennessy is pretty much stock tq and hp under 3k rpm.
either it was a STRONG 6.2L to begin with, the boost is more than 8.5psi, or it was done on a Dynojet
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From: Maine
Roush and every other blower is going to advertise what the blower is capable of efficiently handling, not what the truck will actually do. At 8lbs of boost, that 6.2 will not make 700hp. No way. The blower can make the power at higher boost levels, sure, but you have to have more supporting mods and other things to be able to produce that sort of power.
Also note that the same kit on the 5.0L trucks also is advertised as making UP TO 700hp. Same blower, same boost level, smaller motor. All they are advertising is what is capable of doing with all the extra mods you would need to support that kind of boost level, etc.
Not saying in ANY WAY AT ALL that Hennessey is worth what they charge as I fully believe its not, but they are going to be adding in all of those supporting mods and extras that this Roush kit won't have.
Bottom line, plan on spending thousands more in fuel upgrades, tuning, possibly engine internals, more cooling, etc above the $6200 to make 700hp. Roush makes an AWESOME kit as a good starting point, but you aren't going to make 700hp for 6 grand.
Also note that the same kit on the 5.0L trucks also is advertised as making UP TO 700hp. Same blower, same boost level, smaller motor. All they are advertising is what is capable of doing with all the extra mods you would need to support that kind of boost level, etc.
Not saying in ANY WAY AT ALL that Hennessey is worth what they charge as I fully believe its not, but they are going to be adding in all of those supporting mods and extras that this Roush kit won't have.
Bottom line, plan on spending thousands more in fuel upgrades, tuning, possibly engine internals, more cooling, etc above the $6200 to make 700hp. Roush makes an AWESOME kit as a good starting point, but you aren't going to make 700hp for 6 grand.
you might want to talk to Johnny Lightning about that last line you posted. 580 at the wheels is awful close to 700 at the crank assuming 15% driveline losses. Its ALL Stock Except for the Roush TVS Kit,Roush CatBack Exhaust and a JLP Tune...
bottom line, you are wrong.
Race Red '12 XLT SCrew EB
Joined: Oct 2011
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From: MT
What kind of hp is the factory transmission rated to handle?
Edit: found they are rated for 800ftlbs or torque. Now how about the stock axle shafts?
Edit: found they are rated for 800ftlbs or torque. Now how about the stock axle shafts?
Last edited by EBinMT; Jun 2, 2012 at 11:46 AM.
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Originally Posted by rancherlee
545 RWHP seems a bit fudged for only 8.5 psi. With a 100% efficient boosting device a 412hp + 58% more air (8.5psi) = 650 crank. I know Whipple are fairly efficient but I'm willing to bet it still takes at least 50hp to drive it which puts it under the 600hp mark. N/A trucks are loosing 75hp+ to the rear tires which would put it under 525rwhp pretty quick.
either it was a STRONG 6.2L to begin with, the boost is more than 8.5psi, or it was done on a Dynojet