ZO6 engine blows up on dyno
Discussion
F.M said:
Surely a good dyno operator wouldn`t let it batter off the redline like that before it blew...I`d be mega upset...
Why, I'd expect it should be able to do it all day just so long as it's getting cool air and stable temps etc. I would imagine GM have held them at 6000 rpm for long periods. It's an engine and that's what it should do. If it was my engine I'd have worries because of the value but realistically speaking it should be able to hold the rpm's. Being a vette it's got mega good management. That one let go due to a fault somewhere and imo isn't typical.
Boosted.
Chevy V8's are pretty much one of the most durable motors around, regardless of which one ( I think you could include the LT5 of the ZR1 too, despite it's more exotic construction), what you've got to remember is that even in LS7 Z06 form, at 7 litres and 505 Hp it's still only about 75hp per litre.
And I think if you have to ask why more power, then perhaps you don't understand the character traits of half the people on the Corvette bit - how much is enough? Hmm... VHR care to step forward?
Why RR it? Well some of it's bravado, some is essential tuning, many tuning mods require a session on the RR to sort out.
And I think if you have to ask why more power, then perhaps you don't understand the character traits of half the people on the Corvette bit - how much is enough? Hmm... VHR care to step forward?
Why RR it? Well some of it's bravado, some is essential tuning, many tuning mods require a session on the RR to sort out.
trackdemon said:
2 things spring ot mind:
1) I thought these engines were nigh indestructable
1) I thought these engines were nigh indestructable
They are, if being used within the right performance envelope. You can blow any engine up if you screw up. I think there was mention of a 300 shot of nitrous being added. A stock engine wouldn't like that without some ignition timing changes and the nitrous would need to be added late as well.
Boosted.
Some interesting thoughts over on the Monaro HSV forum. Especially regarding the rumoured LS9 with blower.
www.pistonheads.com/gassing/topic.asp?t=334038&f=69&h=0
www.pistonheads.com/gassing/topic.asp?t=334038&f=69&h=0
v8d said:
Some interesting thoughts over on the Monaro HSV forum. Especially regarding the rumoured LS9 with blower.
www.pistonheads.com/gassing/topic.asp?t=334038&f=69&h=0
www.pistonheads.com/gassing/topic.asp?t=334038&f=69&h=0
To run boost they have to reduce the swept volume/compression ratio, especially on a production engine. I think the ls7 is being phased out hence all the parts on offer if you know people.
Boosted.
trackdemon said:
2 things spring ot mind:
1) I thought these engines were nigh indestructable
2) Why bother RR'ing it? Whats the real point in knowing exactly how many hp an engine does have, surely whats important is does it GO like you want it too.....?
1) I thought these engines were nigh indestructable
2) Why bother RR'ing it? Whats the real point in knowing exactly how many hp an engine does have, surely whats important is does it GO like you want it too.....?
Give me access to tuning software and a dyno, and i'll blow up any indestructable engine within 2 minutes. Probably less.
No engine is indestructable. LSx's are very strong, but they are only as reliable as the person tuning them.
Boosted LS1 said:
v8d said:
Some interesting thoughts over on the Monaro HSV forum. Especially regarding the rumoured LS9 with blower.
www.pistonheads.com/gassing/topic.asp?t=334038&f=69&h=0
www.pistonheads.com/gassing/topic.asp?t=334038&f=69&h=0
To run boost they have to reduce the swept volume/compression ratio, especially on a production engine. I think the ls7 is being phased out hence all the parts on offer if you know people.
Boosted.
Hmm, I thought most compresion ratio mods were done by increases the effective combusion chamber volume, leaving the swept volume the same. Are they doing something odd with the LS engines for boost?
franv8 said:
Boosted LS1 said:
v8d said:
Some interesting thoughts over on the Monaro HSV forum. Especially regarding the rumoured LS9 with blower.
www.pistonheads.com/gassing/topic.asp?t=334038&f=69&h=0
www.pistonheads.com/gassing/topic.asp?t=334038&f=69&h=0
To run boost they have to reduce the swept volume/compression ratio, especially on a production engine. I think the ls7 is being phased out hence all the parts on offer if you know people.
Boosted.
Hmm, I thought most compresion ratio mods were done by increases the effective combusion chamber volume, leaving the swept volume the same. Are they doing something odd with the LS engines for boost?
On the ls7 it's hard to increase the combustion chamber volume significantly because of mechanical limitations. It's a big displacement engine in a small block package. Lowering c/r is something I'm progressing with at the moment
Boosted.
trackdemon said:
2 things spring ot mind:
2) Why bother RR'ing it? Whats the real point in knowing exactly how many hp an engine does have, surely whats important is does it GO like you want it too.....?
2) Why bother RR'ing it? Whats the real point in knowing exactly how many hp an engine does have, surely whats important is does it GO like you want it too.....?
ego maybe ???
all that matters is the 1/4 mile time. In the states it's become a joke about Mustang owners and their dyno printouts. They score high numbers on the dyno, but at the dragstrip their trap times are a big disappointment.
Dyno slips do not win races!!!
But on the other hand... if I paid a mechanic to modify my automobile - increasing performance; a before & after dyno run can help prove that the work was actually performed, and the promised power gains materialized.
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