dougatl

Kudos to the guys at MTI Racing in Marrieta/Atlanta. Last week there was a thread about the dyno results being quite different when the test is run with the hood up compared to a real world test with the hood down.
Baseline dyno on my 06 Z yielded 441.3 HP and 416.1 Torque with the hood up, 418.5 and 394.4 with the hood down.

Both the baseline and post tune dyno runs were made with the car fully warmed up five hours apart.

Reese installed the very new Callaway Honker intake made for the 06 Z and then did his tuning.

I'm very happy w/the results which yielded a gain of 48 HP and 46 TQ. The post tune/intake install numbers are 466.2 HP and 437.7 TQ, hood down.

Got to use the SOTP gauge cruising home on the 75 and 285 and yeah, feels stronger and pulls harder than ever.

Thanks to Reece & Chris, we'll see you guys soon.

Doug

2006 Black Z06 2lz
Callaway Honker Intake
Tuning by MTI Racing Atlanta

Previous Vettes
02 Z06 Black/Black
00 Hardtop Pewter

http://home.earthlink.net/~dougatl/

outnumbered

That is a nice increase.It still amazes me the difference with the hood up and down.I wonder if the #'s are higher while the car is moving since the air is then forced into the engine compartment.

*C7*

Very nice numbers. I'm off to MTI in a few weeks. Thanks for posting your numbers...

xfifty

That's a very good and valid point

dougatl

I'm sure Reese at MTI can shed some light on the issue. I found him and his team there to be very patient explaining his dyno and how the numbers differ so much when the tests are done in real world conditions, hood down, engine fully warmed, compared to some other results we've all seen with a cold engine, fans blowing, etc.

doug

2006 Black Z06 2lz
Callaway Honker Intake
Tuning by MTI Racing Atlanta

Previous Vettes
02 Z06 Black/Black
00 Hardtop Pewter

http://home.earthlink.net/~dougatl/

Cobra4B

Any pics of the C6Z honker?

BoostManiac

Very interesting comparisons of hood up vs hood down. I would really like to see some results of a moving car-----there are ways to estimate HP while moving, although some like G-Techs are not particularly accurate. A car with a good ram air intake and/or forced induction/intercooling can have large gains when moving at say 100 mph, as opposed to sitting in a hot shop with some crappy fan blowing.

0Steve@MTI RACING

For those asking, MTI RACING has pics of the Callaway "Honker" on our website. Photo 1 is on the bottom of the Home Page, photo 2 is on page one of the New Products section. Please remember we are still waiting to hear from Callaway on when the MAFS housing will be available for the 6/Z vehicle. We are using our prototype units at this time!

Cobra4B

^ Might be a good idea to post your url or have it in your profile.

gorillavet

Congrats very nice gain. I think everyone will find with the increased displacement (427) that small modifications will reep much more than with the 346 engine. That is the beauty of cubic inches

PA Z06

Great numbers

J-Rod

Congrats.

I've posted this before, the gains many folks are seeing are as a result of the car pulling so much timing, etc... when IAT's climb. So, on a dyno with hot stagnant air, the delta from removing that retard will be significant.

This is the same with some of the other HUGE dyno numbers I've seen posted. When you look at the why, most of it is in the tune, and not the part so much.

That isn't to say the Callaway isn't a nice piece. In the pics, it looks very nice.

I'm not sure if the gains will be the same on the street with the car moving, but, I expect to have some gains when the tune itself is fixed no matter what.

Enjoy the new found power....

355Spider

Maybe the cold air intakes are of even more value on these cars than we think. They may only make 5 or 10 hp when sitting or with a fan on but they may be of great help on hot days when the car needs that fresh cool air even more.

Dougatl,
Does your car surge from 1500rpms to 1900rpms with the honker installed? Most are doing his with the air charger. Set the cruise at 70 and you'll feel it if it does it. Mine does it but it really doesn't bother me any. I like the idea of fresh cool air in the engine alot more.

dougatl

Tested the theory about surging on the 30 mile cruise home tonight, no surging, smooth sailing at 60, 65, 70 and 75. don't use cruise control often, gave it a shot tonight and didn't feel/notice any surging at all.

doug

Mako7

If possible, please post the AFTER "Hood Up" numbers. This will complete the picture.

Are the numbers SAE corrected? If so, your baseline numbers look spot-on.

Is this a Dynojet Dyno?

As other posters mentioned, it is hard to tell which gains are due to the air intake vs. the tuning, but that is just the way the ball bounces!

If your results (After, Hood-up, which are not posted) produce SAE 500rwhp and SAE 470rwtrq, then this may equate to the conclusion that long-tube headers and high flow cats = -0- gain, which is hard to believe.

It is very interesting to see the mods tested on these cars!

godsvette

Hy, Doug congrats on the mods by MTI. I was their last week and Reese did a tune only on my black Z06 2lz and the tune really makes a difference. Great numbers , hope you enjoy.


Tim

dougatl

Don't have a horse in this race in terms of how much if any loss is found when dynos are done with hood closed or hood open. I just know there was a significant difference in my baseline dynos done under those two conditions.The dyno used is a Dynojet 248 chassis dyno and the difference in numbers were posted in an earlier post, showing a fairly significant loss of power hood open vs hood closed. The data supported what the tuner has consistently found that the differences in airflow affects the engines output. With the motor hot and with the hood closed there is significant loss of power as much as 18 RWHP
The post tune/honker installation numbers were 466.2 HP, 437.7 TQ with the hood closed. I'm told Callaway designed the honker to work as efficiently as possible in real world conditions, hood closed of course, so the hood open dyno results were not different at all. 467.1 HP and 437.9 TQ.
Bottom line for me is the car runs great and we should enjoy them.

doug