1971 GTO 455 at idle

New Summit dual Exhaust with Flowtec Headers on 455 Pontiac. Crane Max Velocity HIT284281 cam (234/242 @ .050" / .488 & .505 Lift), mild porting, Holly Street Dominator intake w. 870 Holley Avenger. 4 speed converted to TH400. Need to disconnect the backup lights!

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1970 GTO 455 ho.





1969 Pontiac GTO Judge vs. 2006 Custom Pontiac GTO - Generation Gap: GTOs
Cast your vote here: http://www.hagerty.com/Articles-Videos/Articles/2014/08/29/Generation-Gap-G TO Today on “Generation Gap,” we’re visiting the Lingenfelter Collection. Known for Lingenfelter Performance Engineering, Ken Lingenfelter was kind enough to let us experience some of his personal cars. Being able to check a few cars off our bucket list, we decided to compare GTOs. Davin has picked the aggressive muscle of a 1969 Pontiac GTO Judge, equipped with a 366 HP 400 V-8 High Output engine with Ram Air III. Matt picked a bit of a cheater 2006 Pontiac Custom GTO. The modern GTO is straight from GM Performance with a Twin turbo LS2 with 750 HP. Which one would you rather drive? Generation Gap appears every other Tuesday on the Motor Trend youtube channel. http://www.youtube.com/motortrend Subscribe now to make sure you're in on all the action! https://www.youtube.com/channel/UCsAegdhiYLEoaFGuJFVrqFQ?sub_confirmation=1 Facebook - http://facebook.com/motortrendmag Twitter - http://twitter.com/motortrend Google+ - https://plus.google.com/+motortrend/posts Website - http://www.motortrend.com





Drifting in the 1966 G.T.O.
1966 Pontiac G.T.O.





PONTIAC GTO Judge (1971 455cid, the differences basic supertuning can make)
Those who know me well, know that I always beat "SUPERTUNING" "SUPERTUNING" "SUPERTUNING" into the ground. This video shows the difference minor tuning can do (This is minor because a 1971 GTO's fuel/ign calibrations are already geared for performance, so there's not as much improvement you can make like you'd be able to on say - a late 70s smogger). But on larger scales, HUGE differences can be made, as much difference as adding performance parts alone. The more the car is severely out of tune/adjust------which happens more with the more mods you make, then the more you'll gain by supertuning it. There's another vid on YT where an Olds 455 was built with performance parts to be totally streetable but achieve 1hp per cubic inch. After they got the recipe of perfect parts all together they were disappointed when she only Dynoed at 320hp. But luckily they did not give up! After the proper ign-curve/timing & carb adjusts were made, the engine jumped from 320 up to 455hp!! No doubt all the new cam/intake/head mods put the old fuel/spark adjustments badly out of calibration for the NEW BREATHING ABILITY. Also with things like dual quads (especially to engines not originally equipped wit them), your adjustments are most likely going to be way off and need calibration even more. There's lots of dual quad cars out there not running well for this reason, however the few that have been calibrated perfectly (EVERY adjustment set for the best "stop watch" time, etc) truly do run like a bat out of hell!




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