gtodoug

My car is finally back on the road! Yeah!! First off, huge thanks out to some people. First and foremost thanks to goes out to Horsepower Sales for building my new monster. Thanks to Jeremy from Fasterprom for helping me design, tune, and plan out this build.

Ok, a little on the build:

2008 Z06
dyno'd today in miami 94 degrees ambient temp
dyno'd on stock chrome speedlines and 345 Invos(weight 64lbs)

Mods:
LG 1 7/8" long tubes no cats
Halltech KB II
Nick Williams 102 tb
FAST 102 ported by Jeremy Formato of FASTERPROMS
FAST billet fuel rails
Stock mufflers modded by Jeremy Formato
Tuned by Jeremy Formato
TR55 plugs gapped at .055"
Comp Cams short travel hyd lifters
Comp Cams trunion upgrade w/stock rocker arms
Comp Cams Valve seals
Comp Cams pushrods
Stock ls7 castings CNC ported by Advanced Induction
Stock valves
Comp cams off the shelf 235/251 .657/661 ground on a 114+4
Electric water pump
ATI 10% underdrive pulley

Ok, after getting all the bugs worked out of the build, we uploaded Formato's email tune for this build which is spot on. The car holds and idle perfectly, and starts great both hot and cold. Drivability is good as well with very minimal bucking/surging. The surging you do feel is at a very minimum and can be felt as early as 1350rpms during decel. Anything above that is virtually gone.

I went to the dyno to confirm where the air fuel is before doing any serious romping on the car.

First pull off the street was 554whp. The car was very rich, I leaned it out to 11.8-12.0:1 a/f. No timing changes from Jeremy's conservative tune. The dyno operator could not get a good tach signal so the tq readings shut off by 4400rpms, that is the 508 reading. It should be more than that based on the way the curve was shaped.

The final hp number was 600whp STD/587whp SAE smoothing factor 5. I don't have any dyno graph, we didn't tune for under the curve as we couldn't get a good tq reading and stuff. I will be back on the dyno soon with a better spark plug and more tuning to see what is left.

Thanks for reading!

Dougie

Unreal

Great job. Looks like a beast.

ertoys

Nice #s

ValoneMotorsports

Nice numbers. Jeremy is the man. He has tuned several cars for me including my 2007 Z

1.8t

Slightly OT for the thread, but when AI ported your heads, did they check the valve guides for proper tolerances? If so, I would assume they were within tolerance due to the fact that you kept the stock valves?

turbo raptor

why the stock valves? dont the exhaust valves often break on even a stock engine

tkr

Yes AI checked the valve guides as I requested. As I had my heads done at the same time as Doug. Phil the owner and head tech said they were within tolerances and looked normal. He suggested checking them again when we put new springs in about 20k miles. Also Phil talked us into leaving the stock exhaust valves as he likes there fit, lightness and they hold up well in a N/A Mod with the correct cam package. Lets hope so..

gtodoug

I don't know if they often break. I know that some have broken, however there are tons more cam only cars on the board by a ratio of probably 50:1 than there are head cam cars. My reasoning for keeping the stock stuff was trying to keep it light. I know that the stainless valve would have been a bit more prudent, but I had to look at how i drive the car and what I'm using it for. Only normally aspirated, no nitrous or boost future. It might see the dragstrip one or two times a year and I drive the car approx 150-200 miles a month and since my usage was lower than most I wanted to try and reap the benifits of the lighter valve train. The stock exhaust valve checks in at 72grams, a stainless valve is approx 100-110grams. Rougly 40-50% heavier. I know there is a point of safety vs. hp, but I feel ok with my decision on staying with the stock stuff for my particular build.

The power did not fall off during the runs today. I can't wait to post up a graph of the curve when I am done with final tuning.

KLLRVET

What injectors are you running?

Joe_G

Another great build Doug. Can't wait to see the stock/bolt-on/h-c graph overlay.

Let me know when you hit the dyno next. More importantly...I'm not going to ease up on you until you hit the track...you know that...might as well go and get it over with! I"m trying to get Tom to join me Saturday.

Separately, what kind of gains do you see from exhaust flaps open vs. closed at your power levels? I know it's pretty dramatic.

Halltech

Very nice Killer Bee numbers indeed. Apparently, our Killer Bee helped achieve some of the biggest dyno numbers ever seen on the chassis dyno.

Carlos Allen has had some real sucess with the same type of setup.

Any trouble with fitment with the WP102 TB? We designed the Super Bee specifically for that throttle body.

Jim

Joe_G

Doug what's the compression ratio on this build? Did you mill the heads or use thin gaskets?

DaOtherOne

Great numbers

OEM pistons??

ALLANB

Do you mean rwhp hit 600 .Whp makes me think engine not rear wheel hp.
Also 11s or low 12s are still piggy rich for an NA car.Most all NA cars run best at 12.8 to 13.2 range generally. Should be more power to free up there and next to know risk. The cars have knock sensors.I run my twin turbo 99 trans am at like 11.5 to 11.8!
And maybe bit more there to gain with timing depending on how conservative he was and compression ,etc.
e85 can bring out more power but of course no available everywhere ,we don't have it and suprised more people dont' run alc injection even on non FI cars that can also let person run more timing and timing makes power.

Personally my main criteria for a street cam is that it not have low speed surging.I absolutely hate low speed surging. I notice even with stock cam these cars are bit touchy if you creep around at like 20mph which have to do in a few places in my city like local park.

gtodoug

Jim, your product is great. Fits awesome with the 102 tb and never even had to get a new coupler or clamps. Any benefit of changing to something different in your stable of intakes?

gtodoug

Using stock injectors right now. They are at a peak of 91% duty cycle 6550rpms at this afr. I'm sure once I get it dialed in at 12.5 or so they duty cycle will be somewhere int he high 80's. I'm on the edge though. I don't usually like to run them so close. I may change them going forward.

Dougie

gtodoug

Oem pistons. OEM shortblock. My intent for this build was 600whp with as much drivability as I can possibly get. It meant doing all the small hp mods, trunion upgrade,lifters, electric water pump, porting the 102, etc. I'm not done yet. I think I can squeak 20 more out of it.

Dougie

Unreal

The gap on the plugs seems high to me. I think mine are gapped at .035".

Our cams are fairly close. I made 550rwhp/520rwtq. I would be interested in what the addition of heads, EWP, and UDP would do for me.

LEAVINU

Amazing results Doug.

As mentioned above me I too wondered about the plug gap of .55 and also wondered why you stated "get better plugs..."? I would have assumed at that power TR6's would be called for but that's an uneducated guess so correct me if I'm wrong.

lane_change

What compression ratio are the heads at?