416 L92 + ported heads. Full story plus results
03-16-2007, 01:33 AM
#41
Does TEA have a cost on a pair of ported/assembled L92 heads like the ones used in tis build? I assume around $2000, but would be interested to know cost....I also hope TEA gets a CNC program for these heads soon!
Now that we got the NA numbers, lets see how a 150 shot does on this cam, but better yet, one with the a big split that is "supposed" to work well in the L92 headed motoes!!!! The torque would be just plain silly....probably add 250+rwtque with this kind of setup!!
What was the timing like on the tune? Heard that the L92 likes LOTs of CR and Timing.
WOnder what a sheet aluminum intake would add...maybe 30-35 rwhp and hopefully carry the torque the same, make the usable powerband at least 7000, maybe 7500 rpm????
Right now, its looking pretty nice to be able to get a complete motor for about $8500 that can generate these kind of numbers. In a couple of months with more cam combos, etc, I could see 560-575 rwhp and even more torque with this type of setup.
A friend just called me with a pretty wicked 03 Cobra, about everything you could do...made 623 rwhp on blower only, street gas tune on a Mustang chassis dyno. Awfully impressive car (weight down to 3400-3500 lbs, solid rear, nicely done car). This Vette makes about 75 rwhp shy (NA) of this mega psi KB blown built/stroked Cobra. Now THAT is impressive!!! Can't wait to see these 416 L92 motors with a nice 150-200 shot with some good gas to allow high CR and timing....should be absolutely wicked on the street.
just thinking out loud I guess
Now that we got the NA numbers, lets see how a 150 shot does on this cam, but better yet, one with the a big split that is "supposed" to work well in the L92 headed motoes!!!! The torque would be just plain silly....probably add 250+rwtque with this kind of setup!!
What was the timing like on the tune? Heard that the L92 likes LOTs of CR and Timing.
WOnder what a sheet aluminum intake would add...maybe 30-35 rwhp and hopefully carry the torque the same, make the usable powerband at least 7000, maybe 7500 rpm????
Right now, its looking pretty nice to be able to get a complete motor for about $8500 that can generate these kind of numbers. In a couple of months with more cam combos, etc, I could see 560-575 rwhp and even more torque with this type of setup.
A friend just called me with a pretty wicked 03 Cobra, about everything you could do...made 623 rwhp on blower only, street gas tune on a Mustang chassis dyno. Awfully impressive car (weight down to 3400-3500 lbs, solid rear, nicely done car). This Vette makes about 75 rwhp shy (NA) of this mega psi KB blown built/stroked Cobra. Now THAT is impressive!!! Can't wait to see these 416 L92 motors with a nice 150-200 shot with some good gas to allow high CR and timing....should be absolutely wicked on the street.
just thinking out loud I guess
Last edited by SDB; 03-16-2007 at 01:47 AM.
03-16-2007, 10:42 AM
#43
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Just to give you a look at how good your heads flow. These are mine ET 245`s
200" 148 117
.300" 228 160
.400" 301 196
.500" 339 247
.600" 354 263
.650" 354 269
.700" 355 272
Here is a post of my dyno sheet from before also. Both mine and yours look good.
https://ls1tech.com/forums/dynamometer-results-comparisons/662627-408-et-245-s-dyno-graph.html
200" 148 117
.300" 228 160
.400" 301 196
.500" 339 247
.600" 354 263
.650" 354 269
.700" 355 272
Here is a post of my dyno sheet from before also. Both mine and yours look good.
https://ls1tech.com/forums/dynamometer-results-comparisons/662627-408-et-245-s-dyno-graph.html
03-19-2007, 06:45 PM
#46
That will never happen especially in my own car.
Update this car idles and drives amazing after the street tuning session we did. And we changed the tuner to a in house tuner and tuned the car with the diablo software.
Not that J Formato couldn't get it right it just needed some more time and he is a couple hrs away. Tommy come by and add some video links on here of the car running for me.
Update this car idles and drives amazing after the street tuning session we did. And we changed the tuner to a in house tuner and tuned the car with the diablo software.
Not that J Formato couldn't get it right it just needed some more time and he is a couple hrs away. Tommy come by and add some video links on here of the car running for me.
03-19-2007, 08:23 PM
#47
very good reporting....I was hoping we could get 550 rwhp and 500+ rwtqe from this relatively cheap setup. Over the next few months, playing with cam, CR, and timing should only make things better. Man, $8500 for a complete forged running motor using factory block/heads/intake/TB/Rails/Injectors, etc that makes great power on pump gas. Used to spend almost that much on a properly sleeved stock block and all the machine work and rotating asembly to get a 422 shortblock!
any plan on switching to a sheet aluminum intake at a later date?
any plan on switching to a sheet aluminum intake at a later date?
03-20-2007, 02:21 PM
#48
No not really. I feel the manifold is holding the combo back in the upper RPM range.
Probally from 6000+ RPM's the manifold is done.
The fact the car makes 550 at 6000 and 6400 shows something is holding the combo back. I don't believe its the cam, and I defentially dont think its the heads.
However I don't thinkk a sheet metal or aluminum manifold will ever be used.
Maybe a aftermarket L92 manifold one day if someone like FAST makes one.
Probally from 6000+ RPM's the manifold is done.
The fact the car makes 550 at 6000 and 6400 shows something is holding the combo back. I don't believe its the cam, and I defentially dont think its the heads.
However I don't thinkk a sheet metal or aluminum manifold will ever be used.
Maybe a aftermarket L92 manifold one day if someone like FAST makes one.
Last edited by JZ'sTA; 03-20-2007 at 02:38 PM.
03-20-2007, 04:36 PM
#50
Yeah, the graph shows the power endng early for that big of a cam....would be interesting to see a nice shet aluminum JUST for dyno testing....maybe +35rwhp? Great setup for the money, and keeping it at/around 6000 rpm that thing will live forever!
03-21-2007, 09:27 PM
#55
Brian, any price on these heads in this buildup....bare castings, plus porting, and assembled with those parts?
Just a very very nice combo for an "early" L92 buildup! Any plans on spraying that donkey??? I am curious how these setups with the specific cam choice and CR react to the spray.
SDB
Just a very very nice combo for an "early" L92 buildup! Any plans on spraying that donkey??? I am curious how these setups with the specific cam choice and CR react to the spray.
SDB
03-22-2007, 07:21 AM
#56
Originally Posted by SDB
Brian, any price on these heads in this buildup....bare castings, plus porting, and assembled with those parts?
Just a very very nice combo for an "early" L92 buildup! Any plans on spraying that donkey??? I am curious how these setups with the specific cam choice and CR react to the spray.
SDB
Just a very very nice combo for an "early" L92 buildup! Any plans on spraying that donkey??? I am curious how these setups with the specific cam choice and CR react to the spray.
SDB
This is the cheapest that you can produce a CNC ported head and keep ANY kind of quality in it, and keep the doors open. If you add the $250 spring kit to that price, along with the price of the heads at $800, then you are close to $2000, and you still have stock valves, but they are a good piece.
Big ports and big valves equal big power on the spray, as nitrous takes up A LOT of room in a port, but the decks of the L92 heads DON'T like the spray.
03-22-2007, 08:05 AM
#57
Originally Posted by Brian Tooley
Most of our heads carry around the same labor charges, $500-$600 for CNC, $100 for the valve job, $100 for hand blending, $50 for flowing, $50 for milling and $50 for final cleaning, checking spring heights and assembly.
This is the cheapest that you can produce a CNC ported head and keep ANY kind of quality in it, and keep the doors open. If you add the $250 spring kit to that price, along with the price of the heads at $800, then you are close to $2000, and you still have stock valves, but they are a good piece.
Big ports and big valves equal big power on the spray, as nitrous takes up A LOT of room in a port, but the decks of the L92 heads DON'T like the spray.
This is the cheapest that you can produce a CNC ported head and keep ANY kind of quality in it, and keep the doors open. If you add the $250 spring kit to that price, along with the price of the heads at $800, then you are close to $2000, and you still have stock valves, but they are a good piece.
Big ports and big valves equal big power on the spray, as nitrous takes up A LOT of room in a port, but the decks of the L92 heads DON'T like the spray.
03-22-2007, 09:40 AM
#58
I would assume the stock deck would handle up to 200 shot easily, its the DP 250-400 shots that pick the deck up in my experience. I would like to see just a 150 wet shot on this particular motor, bet it would make stupid torque.
03-22-2007, 10:18 AM
#59
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Originally Posted by Brian Tooley
Big ports and big valves equal big power on the spray, as nitrous takes up A LOT of room in a port, but the decks of the L92 heads DON'T like the spray.
03-22-2007, 03:54 PM
#60
Originally Posted by Outlaw1
Have you seen an L92 setup have head gasket issues?
Yes, we receive a lot of feedback, both from our customers and performance enthusiasts in general. But like was said earlier, the heads will take a 150-200 shot and do make stupid torque.