Halltech

As most of you know, we took our 08 Z06 to Katech this Winter to build a mild street worthy E85 that could be driven across country, to the store, or at the track.

This motor was not intended to promote bragging rights based on dyno results, but I thought I would share our initial results for some comparisons. Unfortunately, one mod was added to the chassis dyno that was not on the engine dyno, so interpolation of Chassis vs. Engine dyno will be only speculative, not exact.

First of all, Katech did the best job of building this engine one could expect. It is everything I imagined when I decided on what components to give to Jason for pricing, and more.

It made 627 HP (one pull was 629, but less tq) and 578 lbs-ft. torque with the new LSXR intake manifold, and 615/558 lbs-ft with the stock unported intake manifold. Heads, valves, intake manifold, throttle body, were all bone stock. The Carbon Fiber Killer Bee was the only external mod besides headers.



The Mezeire Electric Water Pump came too late for another dyno session, and we had already paid a bunch to dyno the FAST LSXR, so back together it went. One other mod took weeks to test, and Jason finally decided to shelve that item for now.

The Chassis dyno is a Mustang load dyno, which generally shows less RWHP than the DynoJets, but who cares? We were trying to baseline our car, then dyno the Killer Bee and e-mailTune, then dyno tuning by the folks that run the dyno. Last was the dyno with the Halltech SuperBeE85 motor onboard, but no LSXR for now.

Results.

Here are the numbers.

Showroom stock 2008 Z06: 447.3 RWHP/ 400.7 lbs-ft. torque SAE
Halltech Killer Bee and Halltech e-mailtune: 471.1 RWHP/423.4 lbs-ft.
Halltech Killer Bee and VM dyno tuning: 474.5 RWHP/425.8 lbs-ft.
Halltech SuperBeE85 motor: 536.1 RWHP/481.4 lbs-ft. (This should be 550/501 with the LSXR.

Since the last dyno, I have experimented with various air fuel ratios for the E85 fuel, and my confidence has waxed strong. I know there is another 20 HP on tap, and 30 or more lbs-ft. mostly at the bottom, where the dyno above shows tuning problems.

Gasoline needs oxygen to burn the fuel. Leaner is meaner and usually makes more power, up to a point. Once you go beyond the heat threshold for the fuel's Octane rating, you lose power to knock.

E85 is not the same. Richer is better. Why? stoichiometric is around 9.8:1, depending on the time of year. More fuel means more oxygen, since ethanol carries 35% oxygen in the fuel. I found the correct air fuel ratio for max power. 105-109 Octane helps everything, including max timing.

Thought this information would be of interest.

GMuffley

Nice work, Jim!

Katech_Zach

105 octane, 35% oxygenated race fuel at your local pump for $2/gallon. How can you beat that? E85 is an awesome fuel.

There are 11 E85 pumps within 10 miles of my house. Several of those are within 4 miles.

I'm thinking about giving OPEC 85% of my middle finger and switching over to E85. If the price of gas goes up anymore I just might.

55thunder

so... Is the lsxr shipping?

Halltech

We are expecting a couple very soon. Katech has some pre-orders as well.

If you are not pre-ordered, you will probably end up on a long waiting list like the ZR1.

This intake makes power all across the board, with the stock throttle body. A ported throttle body might add a few more.

The thing that is unique about this engine build is how mild is sounds. Jason said, and I agree, the lumpity lump is right inbetween the torquer 110 cam and stock. The cam has less overlap, which means street manners like no other. This package actually trumps the Street Attack package, but is limited to E85 due to the 12:1 CR.

If I had it to do over again, knowing how easy it is to find E85, I would have gone with 13:1 CR.

The basic package is built for much more power, including SC, TC, or Nitrous. I would recommend Katech's rod upgrade and crank, LPE girdle for those wanting to SC beyond 6 PSI.

Any time you Supercharge or TC at 8 PSI you bump your power between 40 to 50%.

This setup will be at around 660 HP of smooth reliable alky motor. Visualize 300 more HP with a Katech SC package.

dvandentop

**** already $2.70 almost for premium around here, i have a feeling we are in for the same BS as last year

Katech_Zach

$2.70? Its $3 here.

stano

$2.99 for reg. here in sunny Kalifornia....$3.35 for the good stuff

Katech_Zach

And by good you mean 91 octane?

6Speeder

The price for E85 is artificially low, supported by us taxpayers. It's a good race fuel, but I wouldn't set up a street car for it, it's just not available everywhere. There is 1, ONE, station selling it in the Albuquerque metro area, that's a 600,000+ people area.

Daytona-flyer

Here's and interesting link. I can't attest to the accuracy.

http://e85vehicles.com/e85-stations.htm

Katech_Zach

Here in the Midwest E85 is everywhere.

Halltech

Not to offend the poster to be sure. I just see the country I grew up in morphing in front of my eyes, and see our cars and the fun we all have disappearing in the next few years.

I remember a Republican nut job as well by the name of Nixon, who brought about the 55 MPH national speed limit, that lasted years after he resigned the Presidency.

Daytona-flyer

It's been said that "The only constant is change". IMHO, E85 should be the future fuel. Hopefully not made from corn but algae.

There is a company offering franchises for algae farms. It seems that's an alternative to corn. It keeps commodity prices down and provides more energy than corn based E85.

Hydrogen fuel cells, hybrids, electric cars with a 40 mile range. Who knows what's next. I'll just keep my Z06 until it rusts away, in about 5000 years!



Eric

6Speeder

Makes sense it'd be readily available in the midwest, seeing as that's where the corn is. Also, you can't mix the alcohol with the gasoline and use the existing pipelines to transport the mix. You have to truck the alcohol to the final distributor and mix there. Just one more cost that we are absorbing.

There are only 5 stations selling E85 in the whole state of New Mexico.

Muir

There is a station down the road from me selling E85...

If this E85 motor was CARB exempt/legal in some way (I heard this was possible with bar ref or some other process due to "conversion to alternative fuel"?) I would be all over it.

Gas is shooting up again.. just in time for summer.

Ahh price manipulation...

I think OPEC are going for a new record in next year's Fortune 500... To have oil companies in the 9 out of 10 of the top profit companies on the planet. Last year they only managed a miserable 7 out of 10!

Black02SS

Excellent results! A couple questions if you don't mind.

1) What AFR did you come up with for the best results on E85 on the dyno?
2) What injectors and fuel pump are you using?

Thanks

Slow Vette

where can i get the E85 tune??

Halltech

1= Confidential

2= FAST 65 lb/hr injectors@58 PSI. Stock fuel system works just fine to 680 HP with E85

Halltech

Nowhere that I know of. It is illegal for the street to retune for alternate fuel.

This is a race only application. Katech cannot install this package, but sells the motor to Halltech.

We do the ECM tuning, by either emailtune or by sending the ECM to Halltech.

E85 is not a great alternative fuel unless the total motor is setup for it with higher compression and the cam that we used.