BigMike NY

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

RGT

Halltech

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.

40YRW8

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

Vito.A

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.

Michael_D

I agree. Dyno sheets that do not show this part of the curve are not telling the whole story.

Z06Ronald

At the risk of being dumb ... what do these correction factors mean?

kingpinfarr

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.

Katech_Zach

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.

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.

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

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- 60°F, 0% humidity, 29.92 in-Hg baro
J1349 - 77°F, 0% humidity, 29.234 in-Hg baro.

JOHN*99*

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.

Katech_Zach

Yes, they did.

u1arunit

So Jason, have you not found the spacers to be a problem with the injector spray pattern?

Katech_Zach

Correct - no problem

oakaro68

Can someone please re post the original picture of the Dyno chart? For some reason I cannot see it.

niphilli2

I PMed Zach about this about six months ago.

TTT for you

Katech_Mike

I've attached an engine dyno comparison of the Torquer 110 vs Torquer 116 vs K501

furious427

Man that 110 makes more everywhere, I just wish it didnt have 12 degrees of overlap or id try it.

oakaro68

What makes you hesitant about the overlap, idle quality?

grinder11

You'll have no problem with idle quality. I'm running 17 degrees overlap, and it idles fine@800rpm, and fine@800rpm with the A/C on. In fact, I want just a bit more lope at idle, so when I've got a few extra $$, I'm gonna have the tuner try lowering the idle to 600-700rpm. We'll see. I'm running a Futral cam, ground by Cammotion. 232°/250° .603"/.608" lift, on a 112 LSA. Maybe the lower lift helps the idle quality, idk. Hope this helps......

K-TownMike

I think you should go for it and let me know how it works out for you