490hp Lt1
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Joined: Mar 2004
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From: Austin, Texas
490hp Lt1 Tony Shepard's LT1 Z/28 put down 490HP and 505TQ at the wheels on the motor alone. Tony has worked long and hard on his car, just wanted to say thanks.
Can't wait to finish the tune and see what it does with the nitrous! We have pictures up on our website check it out. The car looks excellent! We'll have the dyno video up soon.
Can't wait to finish the tune and see what it does with the nitrous! We have pictures up on our website check it out. The car looks excellent! We'll have the dyno video up soon.
Nope the 490RWHP was with the Stock computer. ED wright said himself you can only go to 7250 on the stock computer. Tony has a nice setup, mine is very similiar to his. 396, Single plain, and Ported AFR's make one bad combo. Tony does have a big cam in this car so I would say 8,000 RPM is needed should do at LEAST 550RWHP probably MORE 
.
Do you guys have a Graph we could look at. I like the RWTQ this motor puts out. BTW you guys should have dropped the Belt and made 500, lol.
.Do you guys have a Graph we could look at. I like the RWTQ this motor puts out. BTW you guys should have dropped the Belt and made 500, lol.
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Joined: Oct 2003
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Originally Posted by T/A KID
Nope the 490RWHP was with the Stock computer. ED wright said himself you can only go to 7250 on the stock computer. Tony has a nice setup, mine is very similiar to his. 396, Single plain, and Ported AFR's make one bad combo. Tony does have a big cam in this car so I would say 8,000 RPM is needed should do at LEAST 550RWHP probably MORE .
Do you guys have a Graph we could look at. I like the RWTQ this motor puts out. BTW you guys should have dropped the Belt and made 500, lol.
.Do you guys have a Graph we could look at. I like the RWTQ this motor puts out. BTW you guys should have dropped the Belt and made 500, lol.
Originally Posted by PortPros1
Tony Shepard's LT1 Z/28 put down 490HP and 505TQ at the wheels on the motor alone. Tony has worked long and hard on his car, just wanted to say thanks.
Can't wait to finish the tune and see what it does with the nitrous! We have pictures up on our website check it out. The car looks excellent! We'll have the dyno video up soon.
Can't wait to finish the tune and see what it does with the nitrous! We have pictures up on our website check it out. The car looks excellent! We'll have the dyno video up soon.
Ed
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Its a Auto(4l60E), I think with a 4000+ stall. Has the Victor E manifold, (not wanting to start a Fight, lol) but a Super Vic from what I have been told, would have been a better intake for a setup like this one.
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Verdad Gallardo Thread Starter
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Joined: Mar 2004
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From: Austin, Texas
The motor needs more rpm for sure, we were making 100HP per 1000 rpm when the computer shut down. The dyno was reading 6800rpm when the computer shut down. With the parts we have on this motor it should turn 8500rpm. The motor will put down 600HP to 650HP.
The heads are 227's that we ported here at Port Pros, they flow 320 intake and 240 exhaust.
I'll get the dyno graph and post it, the HP and Torque lines are almost the same.
Once we get the F.A.S.T. system installed it will be one B.A. LT1. The car is a automatic, with a ford 9 inch and a 4500 stall. This car also has 1 3/4 headers, we need really need to step up to 1 7/8 headers.
The heads are 227's that we ported here at Port Pros, they flow 320 intake and 240 exhaust.
I'll get the dyno graph and post it, the HP and Torque lines are almost the same.
Once we get the F.A.S.T. system installed it will be one B.A. LT1. The car is a automatic, with a ford 9 inch and a 4500 stall. This car also has 1 3/4 headers, we need really need to step up to 1 7/8 headers.
Originally Posted by blkchevyz
n20daves is bad ***... but the only lt1 part on that car is the block 
6800 RPM huh 
? Any idea why the computer Shut down at that RPM level. I thought The stock units could pull to 7250 before the system shut down???
Not wanting to dyno race but wonder what this thing would have put down on a 3:23 geared 10-bolt and a M6
? Any idea why the computer Shut down at that RPM level. I thought The stock units could pull to 7250 before the system shut down???Not wanting to dyno race but wonder what this thing would have put down on a 3:23 geared 10-bolt and a M6
Originally Posted by PortPros1
The motor needs more rpm for sure, we were making 100HP per 1000 rpm when the computer shut down. The dyno was reading 6800rpm when the computer shut down. With the parts we have on this motor it should turn 8500rpm. The motor will put down 600HP to 650HP.
The heads are 227's that we ported here at Port Pros, they flow 320 intake and 240 exhaust.
I'll get the dyno graph and post it, the HP and Torque lines are almost the same.
Once we get the F.A.S.T. system installed it will be one B.A. LT1. The car is a automatic, with a ford 9 inch and a 4500 stall. This car also has 1 3/4 headers, we need really need to step up to 1 7/8 headers.
The heads are 227's that we ported here at Port Pros, they flow 320 intake and 240 exhaust.
I'll get the dyno graph and post it, the HP and Torque lines are almost the same.
Once we get the F.A.S.T. system installed it will be one B.A. LT1. The car is a automatic, with a ford 9 inch and a 4500 stall. This car also has 1 3/4 headers, we need really need to step up to 1 7/8 headers.
Bret
On The Tree
Joined: Jul 2002
Posts: 179
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From: Choctaw, OK
Originally Posted by PortPros1
The motor needs more rpm for sure, we were making 100HP per 1000 rpm when the computer shut down. The dyno was reading 6800rpm when the computer shut down. With the parts we have on this motor it should turn 8500rpm. The motor will put down 600HP to 650HP.
The heads are 227's that we ported here at Port Pros, they flow 320 intake and 240 exhaust.
I'll get the dyno graph and post it, the HP and Torque lines are almost the same.
Once we get the F.A.S.T. system installed it will be one B.A. LT1. The car is a automatic, with a ford 9 inch and a 4500 stall. This car also has 1 3/4 headers, we need really need to step up to 1 7/8 headers.
The heads are 227's that we ported here at Port Pros, they flow 320 intake and 240 exhaust.
I'll get the dyno graph and post it, the HP and Torque lines are almost the same.
Once we get the F.A.S.T. system installed it will be one B.A. LT1. The car is a automatic, with a ford 9 inch and a 4500 stall. This car also has 1 3/4 headers, we need really need to step up to 1 7/8 headers.
Dave
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Joined: Mar 2004
Posts: 199
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From: Austin, Texas
Originally Posted by T/A KID
6800 RPM huh ? Any idea why the computer Shut down at that RPM level. I thought The stock units could pull to 7250 before the system shut down???
Not wanting to dyno race but wonder what this thing would have put down on a 3:23 geared 10-bolt and a M6
? Any idea why the computer Shut down at that RPM level. I thought The stock units could pull to 7250 before the system shut down???Not wanting to dyno race but wonder what this thing would have put down on a 3:23 geared 10-bolt and a M6
Don't know, I'm just going by the dyno's reading, there may be a difference between the dyno's reading and the cars computer. The stock computers are suppost to go to 7250rpm.
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Joined: Mar 2004
Posts: 199
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From: Austin, Texas
Originally Posted by SStrokerAce
The real question is the lift and valve size and that will tell you how high it will want to turn.
Bret
Bret
A set of Pontiac 400 heads flow 240cfm with a 2.110 valve, this motor will turn maybe 5000rpm before it stops making power with 400 c.i.
Tony's motor has a 2.100 valve and the heads flow 320cfm with 396 c.i, it will turn 8500rpm before it stops making power. If we were to put Tonys heads on a 327 c.i motor we'd turn even more rpm if the parts could take it.
These motors are nothing more than air pumps, the more air the higher the rpm, the higher the rpm the more power you can make with a given displacement.
As a motor makes more power, turns more rpm, you have to have the proper parts put together correctly or the motor will break.
This is what I was referring to.
It's much more complex than this, cam design, C/R, manifold design etc and so on all make a difference.
I've been building motors and designing parts for about 20 years now, and theres still more to learn, I love my job!
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Joined: Mar 2004
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From: Austin, Texas
Originally Posted by DeltaT
Will the stock block live over >7000rpm and 500+HP??
Jim
Jim
We have billet main caps, good bottom end pieces, ARP main studs and the block is grouted.
If were raced more than 1320 feet at a time, I don't think the blocks would last as long as they do.