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Nov 11, 2007 | 06:10 AM

Matt Gruber

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From: central FL, near the beach.

post your gas saving tips

http://community.webtv.net/MATTGRU/carb
Post your tips on how to get more power AND use LESS gas.
Don't abuse your c3 by feeding it too much gas. If it gets 9-12 mpg it is likely washing the oil off the cyl walls and causing rapid ring wear.

Last edited by Matt Gruber; Nov 12, 2007 at 12:15 PM.

Nov 11, 2007 | 06:20 AM

panic

Team Owner

Joined: Nov 2004

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From: Sorrento Italy

I'd prefer to use my car half of the time at full throttle then twice the time saving money on gas....

Nov 11, 2007 | 06:46 AM

dadyztoy

Intermediate

Joined: Oct 2007

Posts: 26

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From: Zanesville Oh

the work car is for saving gas, the vette is for fun, gas is not a consideration

Nov 11, 2007 | 07:06 AM

Matt Gruber

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From: central FL, near the beach.

no need for uninformed bubbas to chime in bragging on how they waste gas by using jets that are way too big.
this topic is about
NO COMPROMISE POWER and MORE POWER by using less gas.

Nov 11, 2007 | 07:13 AM

andylmusic76

Burning Brakes

Joined: Sep 2005

Posts: 832

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From: Sarasota Florida

Quote:

Originally Posted by Matt Gruber

no need for uninformed bubbas to chime in bragging on how they waste gas by using jets that are way too big.
this topic is about
NO COMPROMISE POWER and MORE POWER by using less gas.

that $2 carb idea sound great. so did it sacrifice ANY performance at all? how long did it take until everything was ready to install on your car again? do you have any pics of what you did?

Nov 11, 2007 | 07:41 AM

C3 4ME

Le Mans Master

Joined: Oct 2005

Posts: 6,247

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From: Glen Allen, VA

I'd save gas by not driving the Vette if it were really a consideration, but gas mileage has never figured into my consideration on whether to drive the Vette or not.

Nov 11, 2007 | 08:43 AM

Matt Gruber

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From: central FL, near the beach.

Quote:

Originally Posted by andylmusic76

that $2 carb idea sound great. so did it sacrifice ANY performance at all? how long did it take until everything was ready to install on your car again? do you have any pics of what you did?

It makes MORE tire squealing torque. I am after MORE fun, not less. Actually i did the mod to improve idle so i could use a bigger cam. The +mpg was just a bonus, a HUGE one at that. The idle was only slightly better

, but i'm happy to get the huge mpg increase

.
It took 3 hours to baby sit the epoxy to shave it level(carb up-side down) for a good seal without gaskets. I let the JBWeld cure overnight.
TIG weld would be faster and worth it! But it was an experiment, so i wanted it to be removable.

Thanks for reading my report

Last edited by Matt Gruber; Nov 11, 2007 at 08:58 AM.

Nov 11, 2007 | 09:08 AM

schmegeggie

Melting Slicks

Joined: Jan 2007

Posts: 2,589

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From: Salisbury Maryland

Just by keeping the car properly tuned, air filter clean and the tires properly inflated, you save several MPG. I know most or all of us in here keep our Vette's running this well, it's the general public that need's to heed.

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Nov 11, 2007 | 09:14 AM

...Roger...

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From: Dayton, Ohio

Your Quote Matt-Once I realized a 4 hole plate would seal it easier, I made my own out of 2/10" plywood, extending it 2" under the Holley bowls, to act as a heat shield. Hot soak dropped 10F. So I made 2 improvements for the same effort.

I'm confused about this statement.Does this mean you dont use the epoxy or weld?How would this seal the cross passages?

Nov 11, 2007 | 09:14 AM

#10

andylmusic76

Burning Brakes

Joined: Sep 2005

Posts: 832

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From: Sarasota Florida

i took a look at my setup, and it won't work. the only gaps i have supply vacuum for the brake boost and the line that goes to the valve cover.

Nov 11, 2007 | 09:17 AM

#11

...Roger...

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From: Dayton, Ohio

Quote:

Originally Posted by andylmusic76

i took a look at my setup, and it won't work. the only gaps i have supply vacuum for the brake boost and the line that goes to the valve cover.

So your saying you would only have brake booster vac on 4 cylinders?

Nov 11, 2007 | 09:38 AM

#12

Matt Gruber

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From: central FL, near the beach.

Quote:

Originally Posted by DWncchs

So your saying you would only have brake booster vac on 4 cylinders?

How did 4cyl cars get PB to work?
I do share your concern somewhat, and suggest u run the PB off 1 side and the PCV & vac. acc. off the other. There is still 2.5 intake strokes per second at 600rpm, so it is hard to make a case that a 4cyl car wouldn't have good brake vacuum. I certainly believe there are cars with barely working brakes that might be unable to use this mod. Hooking the front and rear vacuum ports(now made left & right with epoxy or weld) with a T would reconnect it for comparison testing.

Last edited by Matt Gruber; Nov 11, 2007 at 09:53 AM.

Nov 11, 2007 | 10:02 AM

#13

Matt Gruber

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From: central FL, near the beach.

Quote:

Originally Posted by DWncchs

there is a big screw in the middle. If u epoxy/weld to the screw, how do u get the carb apart? with a plate the screw is unimportant(to get a good seal) and can be removed at rebuild time.

...
another thought on the brakes,
a solenoid valve ($10) could be triggered by the brake light switch, reconnecting the L&R every time u brake....if necessary

Last edited by Matt Gruber; Nov 11, 2007 at 10:07 AM.

Nov 11, 2007 | 10:07 AM

#14

...Roger...

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From: Dayton, Ohio

Quote:

Originally Posted by Matt Gruber

there is a big screw in the middle. If u epoxy/weld to the screw, how do u get the carb apart? with a plate the screw is unimportant and can be ignored.

I still dont get how the plate is going to seal the passage from the open manifold?

Nov 11, 2007 | 10:19 AM

#15

Matt Gruber

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From: central FL, near the beach.

Quote:

Originally Posted by DWncchs

I still dont get how the plate is going to seal the passage from the open manifold?

mod is for a dual plane like the 2101 or 8004 weiand or a stock intake.

either u have a "cut down" dual
or a single plane.
both would require more work

Nov 11, 2007 | 10:30 AM

#16

...Roger...

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From: Dayton, Ohio

Quote:

Originally Posted by DWncchs

I still dont get how the plate is going to seal the passage from the open manifold?

I still dont get how the plate is going to seal the cross passage in the CARB from the manifold?The passage is still going to be exiting from both sides above the plate.correct?

Nov 11, 2007 | 10:37 AM

#17

Matt Gruber

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From: central FL, near the beach.

Quote:

Originally Posted by DWncchs

I still dont get how the plate is going to seal the cross passage in the CARB from the manifold?The passage is still going to be exiting from both sides above the plate.correct?

of course it doesn't. the epoxy/weld is what finishes the job. the plate allows the seal to be moved away from that center screw.

it really helps to have a spare manifold/carb to see it. While this is a cheap mod, i see it could easily be botched

Nov 11, 2007 | 10:43 AM

#18

...Roger...

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Joined: May 2006

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From: Dayton, Ohio

Quote:

Originally Posted by Matt Gruber

I gotcha now.Maybe I'll try filling on both sides of screw or just filling the whole thing with out the screw and then redrilling for the screw to be accessed.But anyway I got the idea,I just got off track for a second.