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Corvette C5 vs Corvette ZR1
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Comments (30)
LONGGONE
December 12, 2008
and to badass....yea pushrods are cheaper...know why. BECAUSE THEY'VE BEEN BUILT FOREVER... if gm desided to start building dohc engines..they'd be cheap too. but they didn't..gm doesn't ride the wave of the future, they always have lagged behind and clung to old technology that can make them a porfit..while that is smart in the short term, unless you upgrade your stuff, you end up selling inferior products. there aren't any pushrod v8's that have the possibility to get 50mg. in a dohc you can achieve that with multiple valve timing, and cam lobe selection, you eliminate friction by eliminating the lifter and the pushrods themselves, and eliminate weight, all while making the engine be able to rev higher. I agree that top fuel cars dont use dohc engines, but some funny cars do. and look at a F1 racer..the fastest (power to weigh reliable) cars in performance driving..they rev at insane levels like 21000 rpm...they go over 200mph and make power levels with small turbos at around 2k...and last longer than a 1/4 mile...brute force is the pushrod way, longevity and reliable power..that the dohc...and gm could use reliability about now.
LONGGONE
December 12, 2008
79 camaro..and that's why gm is in the huge problems it's in. stupid engine designs (albeit still effective) and poor TOP BRASS....the ceo's a F***ing moron.
JoeVetteman
September 12, 2008
Cammedss is correct.GM guys started working on this engine in 1986....few problems but they were all corrected.Lotus,which GM owned at the time helped finalize the design,but GM guys designed and built the this engine.Since it was a very costly option,GM killed it in '95...a shame,since this motor makes awesome power with no power adders.Ask Lingenfelter,Rippie,among others.They can go through the 1/2 in the low to mid 10's,all motor.....and get great mileage to boot.I know,I have one.
1979Camaro
May 10, 2008
The reason GM didn't build an OHC engine family like ford is because during a test, engineers took two similar corvettes, one with an LT4 and one with an LT5. Both were automatics. The engineers had the GM top brass test drive each one, and decide which one they liked better, not knowing what the cars had for engines. Every executive that drove both cars all lined up behind the LT4 equipped corvette. That, boys and girls, is how GM decided between a pushrod v8 or an OHC v8. And that is how the LS engine family came to be.
badASS98
May 02, 2008
DOHC would make more power with smaller cubes.. yeah like the FORD F-150 right. haha. Why would I drive a vette with a 4.something liter motor and pay triple the cost of the pushrod. Pushrod motors are easier and cheaper to upgrade, make more power per dollar and the technology of MPG is just as good as DOHC motors. How many pushrod motors go down the track in funny cars?? How many with DOHC?? Exactly. Nobody bitched about DOHC motors in vettes until some mazazine journalist printed that dumb shit. No people are on the bandwagon.
00SS6spd
April 29, 2008
The 5.7L DOHC LT5 was designed by Lotus - NOT GM.
patrico95ta
March 22, 2008
lotus designed the lt-5 and mercury built it
ALMoTor10sec
March 20, 2008
for a zr1 its kinda of slow
n2osrt4
March 16, 2008
GM designed it and they went to mercury because of there experience with casting aluminum. mercury marine cast the head and the block GM assembled it
cammedss
October 15, 2007
thats funney because i was reading how a team of 45 gm engineers desined the lt5 and ran it through tests for 6 months the first and only proplum they had is the engine would snap the timing chain they up graded to a double roller and fixed the problum then ran the motor betwean 4500 and 6000 rpm for 500 hours thats saying somthing so ya gm can build a dohc motor they choose not to to cut for budget hint the price gape betwean a l98 vette and a lt5 pritty big. the gm team that made the lt5 also created the new vershon lt1 and lt4
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jfarber
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Corvette C5 vs Corvette ZR1
Corvette C5 vs Corvette ZR1
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