Question about the LT5 for you ZR1 guys
11-08-2007, 09:41 AM
#1
Team Owner
Thread Starter
Question about the LT5 for you ZR1 guys
I own a Ford Focus which of course has a overhead twin cam engine. I've been told that engines with multiple cams vibrate a lot more. Is this true with the LT5 compared to say the standard LT1? 
11-08-2007, 09:44 AM
#2
Team Owner
That is bs. OHC motors vibrate no more than any other configuration. More old wives tales. BTW - the LT5 is balanced so well it passes the nickel test! Smoother than any other Corvette motor built before or after.
11-08-2007, 10:17 AM
#4
Team Owner
Thread Starter
Good to know, I figured with a car like the ZR1 they'd have it balanced out pretty good. My Focus vibrates bad and makes a lot of noise, not much power there of course 
11-08-2007, 10:20 AM
#5
Le Mans Master
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St. Jude Donor '06
2 reasons your focus is that way
1. Its a Ford
2. It is missing 4 cylinders
11-08-2007, 10:33 AM
#6
Team Owner
11-08-2007, 10:51 AM
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11-08-2007, 12:01 PM
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St. Jude Donor '05
Ive seen it on Youtube, do a search for zr1
11-08-2007, 12:06 PM
#11
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The LT-5 is smooth, and for an engine of it's day to have it's performance, and it's docile every day driveability, is simply amazing...
Here's a link to a nickel test.
http://www.youtube.com/watch?v=ljtKEv5qxYk
Here's a link to a nickel test.
http://www.youtube.com/watch?v=ljtKEv5qxYk
Last edited by WydGlydJim; 11-08-2007 at 01:19 PM.
11-08-2007, 03:27 PM
#12
Race Director
If memory serve me correctly... The flywheel, crankshaft, and dampner are balanced within half a gram from the factory. That should make things pretty smooth imho. 
11-08-2007, 05:02 PM
#13
Le Mans Master
That's funny, usually what I hear is how DOHC makes an engine smoother not rougher. I don't think it really has much to do with it, except maybe cams are milder in cars with more valves?
I think either type could be quite smooth, or not so smooth, depending on other factors. An I-4 or V6 is inherently prone to more vibration than a 90-degree V8 is. Balance shafts and such can be used to counteract this. And I'm sure machining, assembly, and other tolerances play a part.
I think either type could be quite smooth, or not so smooth, depending on other factors. An I-4 or V6 is inherently prone to more vibration than a 90-degree V8 is. Balance shafts and such can be used to counteract this. And I'm sure machining, assembly, and other tolerances play a part.
11-08-2007, 08:27 PM
#14
Melting Slicks
ummm comparing apples to peaches here. the focus isnt a bad car (no i dont have one) but your comparing a 15k car to a car that would be about 80k (inflation adjusted) today.....BIG difference. the focus should be louder and vibrate more.