Katech_Zach

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.

Everett Ogilvie

Great results, and awesome A-B-C comparison. Also great to hear that the 90mm TB had such a good result.

dvandentop

sweet results will make it worthwhile even if not doing the throttle body right away but would be nice to get it all done at once

obzidian

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?

DSteck

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.

tlaselva

Great to see some a-b dyno comparisons on on new parts.

Thanks, and my CC's ready.

dfinke23

What is the standard LSA on the torquer cam?

Katech_Zach

110

obzidian

Jason, what do you expect the results would be on a stock engine?

Katech_Zach

I would suspect similar, but only one way to tell.

bowtiguy

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.....

kumar75150

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.

F1 CYA

Very nice results! Thanks for the info!

Halltech

The good news is that all of our Killer Bees have the integrated 103mm MAF housing, and have had since day one.

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.

novaz06

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.

Halltech

This was a 428.6 c.i.d. motor, not a 500 c.i.d. motor.

novaz06

oh, okay; i thought this was the 500 inch engine for some reason.

PAUZAO

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?

Katech_Zach

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.

Sébast19X

I'm curious to see the difference from a simple bolt-on LS7 ,ARH catless and a CAI plus the ported intake and TB against the LSXR manifold.

That would be interesting to see

Later,
Sébastien