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I have a 93 Jag z with a '78 340 jag engine in it. When i open up the throttle, the speed goes up to about 85kph and the engine revs stay at 6000-6200 rpm and stays there......i know i can go faster, cuz with my 340 engin in its original frame, i could do around 70mph (my dad clocked me on the side of the highway) whats causing this? is there anything i could do to make it go faster? my friend suggested using Octane Booster and racing oil and maybe some pipes
 

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Zrt is right,check your gearing from the old sled to the new.
Also bear in mind that the 93 probably is a bit heavier than the 78 the motor came out of. ;)
 

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:withstupid: It could be as simple as having the Clutches rebuilt, and replacing all the old Bushings and even the Springs. A mis aligned Clutch is a bad thing!
 

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Find the gearing and secondary clutching set up of a 91-96 Lynx/Puma 340

This would probably help since your are putting a 340 in the Jag you now have a Puma 340 ??? :D
 
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