Corvette Forum : DigitalCorvettes.com Corvette Forums banner

1 - 20 of 21 Posts

·
Registered
Joined
·
42 Posts
Discussion Starter · #1 ·

·
DC PIT CREW BOSS
Joined
·
39,770 Posts
The only way I could do that on my old hot rod would be to JB Weld it on :laughing:
 

·
Premium Member
Joined
·
17,444 Posts
And how many nickel did it cost to run this Test...:rolling:

No really that is one smooth engine...:thumbsup: congrats
 

·
Registered
Joined
·
441 Posts
I posted two video's of my car performing this test. A nickle balance's standing up on the plenium. The nickle did not fall even after 12 minutes at idle. This test concludes how perfect the lt5 is balanced.
Ray
http://www.digitalcorvettes.com/corvette-videos/showphoto.php/photo/1413/cat/508
http://www.digitalcorvettes.com/corvette-videos/showphoto.php/photo/1414
:nuts:
Not my intention to make the nickel test uncool here:D ....but a smooth running engine with very little shake on it's outside is much more a factor of camshaft design's(minimal overlap , wide lobe seperation, Ect..) than anything else....and not really having much at all to do with the actual "internal" engine balancing, especially at idle engine speeds.....most even "not so good" engine balance jobs don't show their vibrations till much higher RPM's over the common idle range RPM's.......the internal balance specs for the LT5 really arent any more exact than most any other performance engine that has been balanced correctly......the LT5's are just a well made smooth running engine by it's mulitple camshaft design and their cams grind specs....For Example: add some higher performance cams to a ZR1 and all the smoothness at idle will suffer greatly(like any other engine) , but the engine will still be balanced just the same.........Joe:thumbsup:
 

·
Registered
Joined
·
16,300 Posts
With my car's idle, I do not think a nickel would stay on my plenium if I laid it flat.

But, I did cruise for over two miles at 170+ with my gf asleep in the passenger seat on a road trip once. Now that is smooth:laughing: :laughing:
 

·
Registered
Joined
·
136 Posts
Not my intention to make the nickel test uncool here:D ....but a smooth running engine with very little shake on it's outside is much more a factor of camshaft design's(minimal overlap , wide lobe seperation, Ect..) than anything else....and not really having much at all to do with the actual "internal" engine balancing, especially at idle engine speeds.....most even "not so good" engine balance jobs don't show their vibrations till much higher RPM's over the common idle range RPM's.......the internal balance specs for the LT5 really arent any more exact than most any other performance engine that has been balanced correctly......the LT5's are just a well made smooth running engine by it's mulitple camshaft design and their cams grind specs....For Example: add some higher performance cams to a ZR1 and all the smoothness at idle will suffer greatly(like any other engine) , but the engine will still be balanced just the same.........Joe:thumbsup:
Your partially correct, but the LT5 was manufactured with superior internal balancing. Also, the 4 cam design hides a rough idle compared to the typical V8. It take extremely larger cams before the idle characteristics change.
 

·
Registered
Joined
·
1,386 Posts
With my car's idle, I do not think a nickel would stay on my plenium if I laid it flat.

But, I did cruise for over two miles at 170+ with my gf asleep in the passenger seat on a road trip once. Now that is smooth:laughing: :laughing:
YOUR MY HERO:rolling: I LIKE THAT, YES HUNNNNNIE WERE HOME.
 

·
Registered
Joined
·
441 Posts
Your partially correct, but the LT5 was manufactured with superior internal balancing. Also, the 4 cam design hides a rough idle compared to the typical V8. It take extremely larger cams before the idle characteristics change.
We'll , Not really superior compared to any "performance" type engine shops engine balancing standards(which Is really what I refering to:thumbsup: )......and yes, I agree that the ZR1's 4 cam design (and grind) promotes smoothness.....thats why I said this in my post.. quote: "The Lt5's are just a well made smooth running engine by it's multiple camshaft design and their cams grind specs".......and I also have first hand experience's with the LT5 cams and their effects on idle:D ....built quite a few of 'em over the years......great engines............Joe:thumbsup:
 

·
Registered
Joined
·
104 Posts
Not my intention to make the nickel test uncool here:D ....but a smooth running engine with very little shake on it's outside is much more a factor of camshaft design's(minimal overlap , wide lobe seperation, Ect..) than anything else....and not really having much at all to do with the actual "internal" engine balancing, especially at idle engine speeds.....most even "not so good" engine balance jobs don't show their vibrations till much higher RPM's over the common idle range RPM's.......the internal balance specs for the LT5 really arent any more exact than most any other performance engine that has been balanced correctly......the LT5's are just a well made smooth running engine by it's mulitple camshaft design and their cams grind specs....For Example: add some higher performance cams to a ZR1 and all the smoothness at idle will suffer greatly(like any other engine) , but the engine will still be balanced just the same.........Joe:thumbsup:
Ding Ding Ding,give that man a cigar.
I have done a lot of stock cam timing testing and if you move the cams for max torque/power guess what suffers?
You got it, IDLE

My stock bottom end 350ci LT5 with stock cams was making 450RWHP and running 123-124MPH but i could not do the nickel balance trick.
 

·
Registered
Joined
·
441 Posts
Ding Ding Ding,give that man a cigar.
I have done a lot of stock cam timing testing and if you move the cams for max torque/power guess what suffers?
You got it, IDLE

My stock bottom end 350ci LT5 with stock cams was making 450RWHP and running 123-124MPH but i could not do the nickel balance trick.
:thumbsup: .....Very true.....and even a fairly mild set of cams "But" ground on a tight LSA will "often" give a decently lumpy Idle as well, even in the LT5.......By the way, nice MPH for a stock bottom end ZR1 with stock cams:thumbsup: .....Joe
 

·
Registered
Joined
·
104 Posts
:thumbsup: .....Very true.....and even a fairly mild set of cams "But" ground on a tight LSA will "often" give a decently lumpy Idle as well, even in the LT5.......By the way, nice MPH for a stock bottom end ZR1 with stock cams:thumbsup: .....Joe

Thanks Joe.
Your LT1 ain't no slouch 121 on motor with A4 is bad ass.
I enjoyed your pictures.

By the way the stock LT5 cam specs are not that small.
Intake is split Dur. @ .050 .214 .229 Lift .390
Exhaust Duration @.050 Dur.214 .214 Lift .390

I just installed new Intake cams
Duration .236 .236
Lift .425 .425
Gained 15rwhp
I will play with cam timing to see if there is a bit more in them.
I'm looking for that magic 470rwhp or 125mph :D
 

·
Registered
Joined
·
441 Posts
Thanks Joe.
Your LT1 ain't no slouch 121 on motor with A4 is bad ass.
I enjoyed your pictures.

By the way the stock LT5 cam specs are not that small.
Intake is split Dur. @ .050 .214 .229 Lift .390
Exhaust Duration @.050 Dur.214 .214 Lift .390

I just installed new Intake cams
Duration .236 .236
Lift .425 .425
Gained 15rwhp
I will play with cam timing to see if there is a bit more in them.
I'm looking for that magic 470rwhp or 125mph :D
:thumbsup: ...good luck with it ......ya got to get some pics of the beast up.....Joe:thumbsup:
 

·
Registered
Joined
·
136 Posts
I just installed new Intake cams
Duration .236 .236
Lift .425 .425
Gained 15rwhp
I will play with cam timing to see if there is a bit more in them.
I'm looking for that magic 470rwhp or 125mph :D
I thought you tried .237 .440 sgc intake cams with a power decrease a while back and are selling them? Is the .236 .425 new cams? If so, I cant see much if any diff then the others.
 

·
Registered
Joined
·
104 Posts
I thought you tried .237 .440 sgc intake cams with a power decrease a while back and are selling them? Is the .236 .425 new cams? If so, I cant see much if any diff then the others.
.

Yes,i had tried the SGC II intakes there was never a power decrease,at the time i also had the huge valves the valves were robbing 10-12rwhp.

Mike, it's a big and long R&D story that has taken a while and now i am almost done and getting real close to my goal for a stock bottom 350ci.

Pete
 

·
Supporting Vendor
Joined
·
152 Posts
.

Yes,i had tried the SGC II intakes there was never a power decrease,at the time i also had the huge valves the valves were robbing 10-12rwhp.

Mike, it's a big and long R&D story that has taken a while and now i am almost done and getting real close to my goal for a stock bottom 350ci.

Pete

Very close to his goal.


Al.:partyon:
 
1 - 20 of 21 Posts
Top