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Old 07-03-2011, 02:48 PM   #21
BigMike NY
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Hi Jason,

I am getting ready to start modifying my BONE stock '08 Z. The initial mods forthcoming are as follows: American Racing Headers w/ x-pipe and hi-flow cats through factory exhaust, Halltech CF112 & beehive, 160* thermostat and of course a custom tune. Which one of your Katech cams would you recommend?

What kind of power can I expect with the above listed mods, cam included?

Thank you
Mike
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Old 07-03-2011, 02:55 PM   #22
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Quote:
Originally Posted by Mopar Jimmy View Post
WOW, the Torquer 110 made considerably more HP and TQ throughout the entire RPM band. If I had to choose right now Torquer 110 all the ay baby!
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Old 07-03-2011, 10:07 PM   #23
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Quote:
Originally Posted by Katech_Jason View Post
Yes



~530



1. Interesting idea

2. We did that. It traded ~5hp for 5tq




13:1 compression
E85
FAST manifold
102mm throttle body



I haven't driven the car yet, but idle/drivability should be very good. Jim Hall loves his.

I tried to pick two of the most idential engines for this comparison. Both Street Attack LS7s without ported heads, FAST manifolds, or bigger throttle bodies.
I was not looking for the highest HP number, but rather a super street manners. The 110 is just about right for most guys and would have put us well over 600 RWHP.

Our car works on the power/weight ratio goal, which we have a 4.2lbs/hp and insane torque. That is a better ratio than the Bugatti Veyron.
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Old 07-04-2011, 01:08 AM   #24
40YRW8
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Jason,
A couple of guys asked about the dip in the torque curve. Do you think that the FAST LSX-R manifold with the longer runners might smooth this out a little or possibly eliminate it? From what I have seen on dyno runs with the FAST, that seems to be about where it has an advantage over the stock manifold. Have you tried one with the FAST manifold?
Gary
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Old 07-04-2011, 10:07 AM   #25
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It would also be interesting to see the HP/TQ curves for 1000-3000rpm since that is where the engine operates 90% of the time on the street.
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Old 07-04-2011, 02:24 PM   #26
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Originally Posted by Vito.A View Post
It would also be interesting to see the HP/TQ curves for 1000-3000rpm since that is where the engine operates 90% of the time on the street.
I agree. Dyno sheets that do not show this part of the curve are not telling the whole story.
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Old 07-04-2011, 05:01 PM   #27
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Originally Posted by Katech_Jason View Post
It would make more due to dyno headers, aftermarket calibration and J607 vs J1349 correction factors.
At the risk of being dumb ... what do these correction factors mean?
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Old 07-04-2011, 06:01 PM   #28
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I've had the Torquer 110 since April, 2k miles. It rocks. Nearly zero compromise in driveability. Running 25-deg advance at idle, it's difficult to tell whether or not the vehicle is bone stock (from idle quality). Pulls hard off the line, but there's a noticeable seat-of-the-pants increase in torque around 4k-rpm. Revs to the sky smooth and quick. For NA applications, no doubt I'd take the 110 everytime.

Only complaint: I think it should be in the $380-$430 range like every other LS7 cam, especially considering it's manufactured by CompCams. Wasn't enough of a complaint to keep me from buying it though.
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Old 07-05-2011, 10:57 AM   #29
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Quote:
Originally Posted by Michael_D View Post
Jason,

Have you done any further testing / comparisons with these two cams?

What do you think is happening to cause the dip in torque between 3200 and 4400 with the 110 grind? It's still there with the 116, but not as severe.

Did you try advancing / retarding the 116? I'm assuming the posted dyno run is with it straight up?
Just this test. The dip in the torque curve is normal for LS engines and has to do with runner tuning although it is also affected by camshaft as you see here.

We did not sweep test the cam. Often times its installed straight up, but in this test engine for whatever reason it was installed at 110.

Quote:
Originally Posted by BigMike NY View Post
Hi Jason,

I am getting ready to start modifying my BONE stock '08 Z. The initial mods forthcoming are as follows: American Racing Headers w/ x-pipe and hi-flow cats through factory exhaust, Halltech CF112 & beehive, 160* thermostat and of course a custom tune. Which one of your Katech cams would you recommend?

What kind of power can I expect with the above listed mods, cam included?

Thank you
Mike
Normally we go with the Torquer LS7 110 as it suits 95% of the customers looking to do a cam. By most people's standards for doing a camshaft it's mild, but the 116 is even milder still. The 110 will put you at about 600-610bhp with proper intake and exhaust, the 116 at about 585.

Quote:
Originally Posted by 40YRW8 View Post
Jason,
A couple of guys asked about the dip in the torque curve. Do you think that the FAST LSX-R manifold with the longer runners might smooth this out a little or possibly eliminate it? From what I have seen on dyno runs with the FAST, that seems to be about where it has an advantage over the stock manifold. Have you tried one with the FAST manifold?
Gary
Here is our LSXR A-B test. It looks like direct torque curve shift. No changes to the dip.
http://forums.corvetteforum.com/c6-z...t-results.html

Quote:
Originally Posted by Z06Ronald View Post
At the risk of being dumb ... what do these correction factors mean?
Just real quick and simple...The dyno is correcting the horsepower for weather conditions so no matter what the conditions of the day are, we can duplicate the performance from day to day. The baseline for this correction factor is different between the two correction factors.
J607- 60F, 0% humidity, 29.92 in-Hg baro
J1349 - 77F, 0% humidity, 29.234 in-Hg baro.
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Old 07-05-2011, 12:37 PM   #30
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Default Which injectors were used?

Do the tests with the Fast LSXR use the the stock LS7 fuel injectors with the OEM style fuel rail with spacers? I have some concern that spacers will effect the fuel spray pattern since the tips are raised in the port.
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Old 07-05-2011, 12:44 PM   #31
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Do the tests with the Fast LSXR use the the stock LS7 fuel injectors with the OEM style fuel rail with spacers? I have some concern that spacers will effect the fuel spray pattern since the tips are raised in the port.
Yes, they did.
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Old 07-05-2011, 12:53 PM   #32
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Yes, they did.
So Jason, have you not found the spacers to be a problem with the injector spray pattern?
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Old 07-05-2011, 01:12 PM   #33
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So Jason, have you not found the spacers to be a problem with the injector spray pattern?
Correct - no problem
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Old 07-05-2011, 01:12 PM
 
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