Katech "Street Attack LS7" 640hp 555 lb-ft + dyno video screaming 7140rpm
04-13-2006, 07:37 PM
#1
Katech "Street Attack LS7" 640hp 555 lb-ft + dyno video screaming 7140rpm Here is our "Street Attack LS7" crate engine
Engine: LS7
Displacement: 427ci
Heads: Katech ported LS7
Pistons: Katech forged LS7
Connecting rods: Katech rebushed LS7
Cam: classified
Springs: Katech high lift LS7
Retainers: Katech ultra-light
Induction: Stock LS7
Exhaust: TPIS headers
Dyno video. Turn your sound up and watch it scream 7140rpm!
http://www.katechengines.com/street_...yno_1_0001.wmv
Engine: LS7
Displacement: 427ci
Heads: Katech ported LS7
Pistons: Katech forged LS7
Connecting rods: Katech rebushed LS7
Cam: classified
Springs: Katech high lift LS7
Retainers: Katech ultra-light
Induction: Stock LS7
Exhaust: TPIS headers
Dyno video. Turn your sound up and watch it scream 7140rpm!
http://www.katechengines.com/street_...yno_1_0001.wmv
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04-14-2006, 10:39 AM
#9
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Is that the idividual cylinder A/F ratios on the bar graph? Are they ususally that far apart?? Is there any gain by matching those A/F ratios as close to eachother as possible??? Bad A$$ engine by the way.
04-14-2006, 10:50 AM
#10
Originally Posted by RunNE1
Is that the idividual cylinder A/F ratios on the bar graph? Are they ususally that far apart?? Is there any gain by matching those A/F ratios as close to eachother as possible??? Bad A$$ engine by the way.
Yes, they are and they are always that far apart.
04-15-2006, 09:50 AM
#14
Originally Posted by Tuner@AandACorvette
Are the springs and retainers being sold separately and will they work well on stock LS7 heads and valves?
Thanks,
Charlie
Thanks,
Charlie
Yes, the springs are sold seperately and can be used on stock head. Our primary reason for using them is for a high lift cam.
04-15-2006, 02:55 PM
#15
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This may seem a little off track for such an expensive engine but can it sustain 150HP or 200HP of direct port nitrous blast while still lasting a good 40,000 miles or is this far fetched for such an already extreme powerplant? 
04-15-2006, 04:21 PM
#17
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No disrespect, but LG is getting 620rwhp compared to 640 fly wheel hp, with just head work, cam, and bolt-ons on their modified LS7. I know you guys are tight with GM and the C6R race team, but those prices listed in your other thread seem higher than even lingenfelter charges. 
04-15-2006, 05:47 PM
#20
Originally Posted by FAST LS1
No disrespect, but LG is getting 620rwhp compared to 640 fly wheel hp, with just head work, cam, and bolt-ons on their modified LS7. I know you guys are tight with GM and the C6R race team, but those prices listed in your other thread seem higher than even lingenfelter charges.
This engine has cam, heads, and headers. It makes 640 at the crank. Catch my drift?