Your Induction system, heads, CIs, Cam, Compression, Trans, rear gear, exhaust- MPG.

OK, me first:
Offy single plane dual quad intake with 500 Edelbocks.
401 ci
China Aluminum Heads - 195cc intake--TSCH Racing Heads- ported by me
ported Rams 2 1/2"exhaust with Pypes race pro mufflers
30 30 Fuelie cam
True static 11 to 1
Munice Wide Ratio
3.55 posi
14 to 17 mpg.

This should get interesting. Lets find out what combos get good Gas milage or bad Gas mileage.:drink:

Please try and get all the info requested in. If you don't know your MPG--guess-- you will have a good idea just by driving the car.:noworry:

The more engines I have here, the better the info it will supply. It does not matter what the your gas mileage is- all info will lead to good reference for future builds. At the end of this I will put all the info together. :goodevil:

Engine Name: Ram Jet 502
Engine type: Chevy big-block V-8
Block Part Number: 10237292
Block Type: Cast iron with 4-bolt main caps
Bore x stroke (in): 4.47 x 4.00
Camshaft duration (@.050 in): 224 degree intake / 234 degree exhaust
Camshaft lift (in): .527 intake / .544 exhaust
Camshaft Part Number: 12366543
Camshaft type: Hydraulic roller
Compression ratio: 9.6:1
Connecting Rod Part Number: 10198922
Connecting rods Type: Forged steel, shot peened
Crankshaft Part Number: 10183723
Crankshaft Type: Forged steel
Cylinder head Part Number:12363390
Cylinder head Type: Aluminum oval port; 110cc chambers
Displacement (cu in): 502
Distributor Part Number: 1104060
Distributor Type: HEI
Ignition timing: 8 degree BTDC @ 800 rpm; 36 degree total @
Maximum rpm: 5800
Piston Part Number: 12533507
Pistons Type: Forged aluminum
Recommended fuel: 92 octane
Rocker arm ratio: 1.7:1
Rocker arms Part Number: 12368082
Rocker arms Type: Stamped steel
Valve size (in): 2.25 intake / 1.88 exhaust; stainless steel
Water Pump Part Number: 14058915
Water pump Type: Aluminum, short-style
Fuel Injection: Ram Jet MEFI 4 Injection 38#/hr Injectors
Throttle Body Part Number: 17113524
Flywheel: GM Nodular Iron 15#
Flywheel Part Number: 14095987
Clutch: Center Force Dual Friction
Transmission: 7021626AK, GM 1 1/8”-26 Spline Special Heavy Duty 9 DP Road Race 6th Gear Sets, 450 Ft. Lbs.
Transmission Ratios: 3.28, 2.14, 1.57, 1.24, 1.00, 0.80
Final Drive Ratio 3.08:1
Car Wt with driver and full fuel: 3250 Lbs.

Estimated MPG Street 15, Race <10

Hi

427 CI 4 bolt main BB .030 " over
L71 solid lifter square port heads
compression a touch over 11:1
original L71 solid lifter cam shaft
435 HP tripower induction
GM t56 Viper 6 speed tranny
center force double friction clutch
4.11 rear posi
min 18 Liter/100 KM , max around 35 Liter ( about 13 Miles/Gal min, max up to 7 Mil/Gal. )
alu radiator with double electric cooling fan
engine oil cooler temp controlled
ignition timing max 36 , with vacuum up to 52
red line RPM 6500
drivetrain still on original rear 7 leaf Gymkana steel leaf spring ( to keep some weight on the aft axle for acceleration )

Günther

All pertinent information is listed below.

I've seen 20mpg on the highway, and as good as 14mpg in town, but she usually gets around 9-11 in town because I can't keep my foot out of the carb.

glenn64vette said:

This should get interesting. Lets find out what combos get good Gas mileage or bad Gas mileage.:drink:

Click to expand...

:bounce:
I'm very interested in seeing the results to this thread.............want a performance engine
in the son's Vette but don't want the mileage to go to crap in the process either.

four dcoe 45mm webers on a moon ir crossram feeding afr's ,,,,,,,,,,,,, no comment on the mileage due to lack of self control .

GEE said:

four dcoe 45mm webers on a moon ir crossram feeding afr's ,,,,,,,,,,,,, no comment on the mileage due to lack of self control .

Click to expand...

Can you give us a guesstement? This is about gas miliage. I just paid 4 dollars a gallon tonight.:amazed:

I,m pulling a 3:7 gear with a tremec 3550 so a guesstimate based on behaviour would give about 14/15 mpg .

GEE

Daily driver, ZZ4, 4spd., 3.54 rear, stock exhaust w/o cats, stock 255-60-15's.

Every tank full, I get 12 to 14 MPG. I can see a Shell gas staion from here, today it's $4.18 Premium.

Modified ZZ4:
Dynomax headers, duals, and Borla mufflers
Richmond 5 speed
3.08 rear gears
17x8" wheels with 235/50/17 tires

Gas milage: 16-19 mpg

Motown 427 Small Block
Dart PRO1 227 CNS heads
Edelbrock Victor Jr. (ported)
Crane solid roller 256° - 264° @ 0.050" - 108° LSA
Crane Shaft roller rockers
Mighty Demon 850 CFM annular discharge
MSD Pro Billet distributor
MSD 6AL
Moroso Vacuum Pump

You guys says 4$ per gallon is a lot???
Here in Italy we pay 1.4 Euros per liter !!!! (more than 2.2 $ per iter):banghead:

...so.... I realy don't care mileage...... I only care to drive as fast as possible between the gas stations!

I paid 1.575 Euros a liter today :bomb::sweat::twitch::suicide: That's what, right around $9.60 a gallon?

That's with the euro costing 1.56? dollars roughly. When the dollar goes up we're REALLY screwed. I'm now going for smiles per gallon instead of miles per gallon.

Nice combo you have there Pier Paolo.

I have trick flow G1 heads, custom crossram w/ 4 dellorto DHLA45M Tri Jet Pressure carbs.

Thanks Marc..... in the next days I will tell you how it is!

....I have completed the engine today, now I need to put it in the bay!

pics please

OK.... tomorrow I will take some pics!

Guys, don't forget to put your Compression Ratio in.

As this goes on, I think this will be very enlightening.:drink:

388 ci
Brodix IK200 heads,ported & polished
Brodix Bracket HV1015 intake,ported & polished
725 Demon carb
6al ign box,msd pro billet diz,blaster HVCII coil
Howards roller cam,230in/230ex,lift 510in/510ex, 108lc
11:1 cr
VP110 fuel
BW M21 trans,3:70 rear gears
2 1/2" true duals,flowmaster flo-pro 40 series,dynomax headers
MPG, somewhere around 10-12 mpg

kwplot34 said:

388 ci
Brodix IK200 heads,ported & polished
Brodix Bracket HV1015 intake,ported & polished
725 Demon carb
6al ign box,msd pro billet diz,blaster HVCII coil
Howards roller cam,230in/230ex,lift 510in/510ex, 108lc
11:1 cr
VP110 fuel
BW M21 trans,3:70 rear gears
2 1/2" true duals,flowmaster flo-pro 40 series,dynomax headers
MPG, somewhere around 10-12 mpg

Click to expand...

This is for me, what is your bore and stroke combo? Thanks.:beer:

Pictures

As I promise, some pics of my new engine!

.... compression ratio?

12.5 : 1 :thumbs:

glenn64vette said:

This is for me, what is your bore and stroke combo? Thanks.:beer:

Click to expand...

You are going to make me put on my thinking cap now.
but i believe this is what i have.
4.060" bore
3.75" stroke