[Z06] FAST LSXR 102mm LS7 intake manifold dyno test results
#1
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FAST LSXR 102mm LS7 intake manifold dyno test results
Test engine: Halltech's E85 Track Attack LS7
CR: 12:1
Camshaft: Torquer LS7 on a 116LSA (milder)
Test A (C2-8279) - LS7 intake manifold, 90mm TB, 100mm MAF, Killer Bee intake
Test B (C2-8318) - LSXR intake manifold, 90mm TB, 100mm MAF, Killer bee intake
Test C (C2-8324) - LSXR intake manifold, 102mm TB, 101mm MAF, Killer bee intake
Peak power/torque:
Test A 615/558
Test B 627/578 another run, C2-8316 (not pictured), was 629/577
Test C 631/576
Conclusions:
1. Peak power numbers are not the only thing that tells the store here. The entire torque curve was shifted up. This isn't one of those mods where you gain a little here and sacrifice a little there. The entire curve was shifted up. The same effect that you get by adding displacement or compression. Adding this manifold was like adding 11 cubic inches to this engine or maybe even a full compression point.
2. 20 ft-lbs with the 90mm throttle body will give this a great seat-of-the-pants feel.
3. Good news for Corvette owners with electronic throttle. The 90mm stock throttle body performed better than I had hoped and makes this a worthwhile upgrade without having to upgrade the throttle body. The engine actually made more torque with the smaller throttle body. It makes sense. Smaller ports usually mean greater velocity and more torque. No large drive-by-wire throttle bodies currently exist on the market today.
4. We have a hunch that the more aggressive you go with the camshaft, the more the throttle body will make a difference. This is a very mild camshaft in this engine and you will likely see more gains by changing the throttle body on aggressively-cammed engines.
CR: 12:1
Camshaft: Torquer LS7 on a 116LSA (milder)
Test A (C2-8279) - LS7 intake manifold, 90mm TB, 100mm MAF, Killer Bee intake
Test B (C2-8318) - LSXR intake manifold, 90mm TB, 100mm MAF, Killer bee intake
Test C (C2-8324) - LSXR intake manifold, 102mm TB, 101mm MAF, Killer bee intake
Peak power/torque:
Test A 615/558
Test B 627/578 another run, C2-8316 (not pictured), was 629/577
Test C 631/576
Conclusions:
1. Peak power numbers are not the only thing that tells the store here. The entire torque curve was shifted up. This isn't one of those mods where you gain a little here and sacrifice a little there. The entire curve was shifted up. The same effect that you get by adding displacement or compression. Adding this manifold was like adding 11 cubic inches to this engine or maybe even a full compression point.
2. 20 ft-lbs with the 90mm throttle body will give this a great seat-of-the-pants feel.
3. Good news for Corvette owners with electronic throttle. The 90mm stock throttle body performed better than I had hoped and makes this a worthwhile upgrade without having to upgrade the throttle body. The engine actually made more torque with the smaller throttle body. It makes sense. Smaller ports usually mean greater velocity and more torque. No large drive-by-wire throttle bodies currently exist on the market today.
4. We have a hunch that the more aggressive you go with the camshaft, the more the throttle body will make a difference. This is a very mild camshaft in this engine and you will likely see more gains by changing the throttle body on aggressively-cammed engines.
#4
Safety Car
Wow. The TRQ. value is great. Peak hp is around what I had expected but with more mods, this new manifold should yield even better results. Also, like how you saw gains across the whole board not just at peak which would translate as you stated, a solid gain in the SOTP feel. Honestly, we should see more 600rwhp H/C but I think a solid 102mm TB is where we will see some really nice gains on a H/C package.
I'm a little perplexed on something. I have the KB intake... my MAF is a 103mm or a 100mm? Gonna call Halltech and see what is up.
So, this motor is basically a stock engine with cam, valvetrain, dyno headers and the test equipment? Was it on E85 or pump?
I'm a little perplexed on something. I have the KB intake... my MAF is a 103mm or a 100mm? Gonna call Halltech and see what is up.
So, this motor is basically a stock engine with cam, valvetrain, dyno headers and the test equipment? Was it on E85 or pump?
#5
Safety Car
Awesome! That gain in torque is pretty nice... definitely going to have to consider this. I'd be curious how it reacts with a more aggressive cam like the GM Stage 3.
#8
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#10
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#11
Melting Slicks
nice..lets see what kind of gains we get with a few more cubes under that baby. I'll do an A-B with my ported LS7 Vs. LSXr as soon as I get it and get a chance to get the new big heads on. signed up ready to go.....
#12
Le Mans Master
Thanks you very much for doing this. From those results, I am right on the fence about the new setup.
I have a very large camshaft so the manifold would probably get me more hp but I would also be comparing it to a ported LS7 vs a stock LS7.
I have a very large camshaft so the manifold would probably get me more hp but I would also be comparing it to a ported LS7 vs a stock LS7.
#14
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St. Jude Donor '09
Wow. The TRQ. value is great. Peak hp is around what I had expected but with more mods, this new manifold should yield even better results. Also, like how you saw gains across the whole board not just at peak which would translate as you stated, a solid gain in the SOTP feel. Honestly, we should see more 600rwhp H/C but I think a solid 102mm TB is where we will see some really nice gains on a H/C package.
I'm a little perplexed on something. I have the KB intake... my MAF is a 103mm or a 100mm? Gonna call Halltech and see what is up.
So, this motor is basically a stock engine with cam, valvetrain, dyno headers and the test equipment? Was it on E85 or pump?
I'm a little perplexed on something. I have the KB intake... my MAF is a 103mm or a 100mm? Gonna call Halltech and see what is up.
So, this motor is basically a stock engine with cam, valvetrain, dyno headers and the test equipment? Was it on E85 or pump?
Comp Cams just recently dyno tested just the Hornet MAF 103 vs the old style Delphi MAF and picked up 10 HP just from the MAF itself. (LS3 motor)
Our MAF is the largest in the industry, and it is shear coincidence that it is 1mm larger than the mouth of the LSXR intake manifold, since our MAF came two years before the intake manifold. Comp Cam (FAST) also dyno tested our Killer Bee and found 15 more HP over the stock LS7 intake when dyno testing their manifold.
Bottom line: If you have the Killer Bee, you have the largest MAF on the market.
Jim Hall
P.S. Halltech will likely not be selling individual components except for our Killer Bee, so Katech should be your source for the LSXR intake manifold and Killer Bees in Carbon Fiber, or Paint matched.
__________________
"World Class Performance for your Corvette"
Intake Design and Engineering since 1999
Halltech Systems, LLC
262-510-7600
For service email:
orders@halltechsystems.com
www.halltechsystems.com
"World Class Performance for your Corvette"
Intake Design and Engineering since 1999
Halltech Systems, LLC
262-510-7600
For service email:
orders@halltechsystems.com
www.halltechsystems.com
#15
To be honest I was hoping for a whole lot more than 2% hp increase! Even 4% torque increase isn't so impressive. Not so sure about that "SOTP feel" will be improved! I was hoping for more like 30hp, especially on a big cube motor like the 500 inch test motor. I guess my expectations were just a little off based on all the anticipation for this piece. I had thought the intake was such a huge "choke point" on these engines.
Last edited by novaz06; 03-17-2009 at 06:26 PM.
#16
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St. Jude Donor '09
To be honest I was hoping for a whole lot more than 2% hp increase! Even 4% torque increase isn't so impressive. Not so sure about that "SOTP feel" will be improved! I was hoping for more like 30hp, especially on a big cube motor like the 500 inch test motor. I guess my expectations were just a little off based on all the anticipation for this piece. I had thought the intake was such a huge "choke point" on these engines.
#18
Jason, are these RWHP/RWTQ gains, or flywheel gains? Also, can you post the entire graph, so that we can see the numbers below 4.500 RPM? This is the same intake that will be realeased for the LS3's, correct?
#19
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These are engine dyno numbers. Chassis dynos are too inconsistent to do this kind of testing. That is the entire graph. The superflow only takes so many data points so we concentrated on the area of most importance. It is not exactly the same manifold as the LS3.
Last edited by Katech_Zach; 03-17-2009 at 06:41 PM.