just a little curious as to what i can expect...

 

It takes more fuel to fill more CID but it also depends on gearing and tire size. My daily driver 454SS gets 10-12 mpg but so did my old 4x4 with a 350. I really notice poor milage if it idles for any length of time like when warming it up in the morning when it's cold. With the OD tranny I've also gotten close to 17 mpg on the highway.

We don't want to talk about milage with the race car. If I'm lucky it might be as high as 4 mpg.

------------------
Follow my racing progress on Stephen's racing page
and check out the race car

87 IROC-Z Pro ET Bracket Race Car
383 stroker (carbed) with double hump cast iron heads and pump gas
461 Big Block installed and ready for the 2001 racing season

Best results before the 383 blew up
Best ET on a time slip: 11.857 altitude corrected to 11.163
Best MPH on a time slip: 117.87 altitude corrected to 126.10
Altitude corrected rear wheel HP based on power to weight ratio: 476.5
Best 60 foot: 1.662

Racing at 3500 feet elevation but most race days it's over 5000 feet density altitude!
Member of the Calgary Drag Racing Association

87 IROC bracket car, 91 454SS daily driver, 95 Homebuilt Harley

 

ok, i have 3.42 gears and a th400 in a 83z... fiberglass hood and all... so am i crazy to think that i might get maybe close to 15mpg on the highway? i could settle for 12 or 13... but 15 would be nice...

 

I haven't driven my combo yet except for down the backlane, but I would be extremely lucky if I could get 10 mpg. I did this swap without regard to fuel economy. 454/ 4.10/ gas pedal always on the floor. Sometimes you just have to pay to play!

On another note, I just picked up an S10 manual steering box for cheap. I guess that solves my p/s pump mounting problems! HEHE

------------------
85 Berlinetta Iroc exterior Lg4 305 best e.t 14.4 street tires naturally aspirated....installing/ rebuilding 450-475 HP 454....YAHOOO!!!

 

big block camaros must be big in canada... seems like everyone with a bbc thirdgen is in canada... do yall have emissions over there?

 

No emissions in Winnipeg.....just crappy vehicle safeties!

 

Do shoebox Chevy's count?

In May '98, I took a 900 mile round-trip to a highschool reunion in the '57. Had 3.36 gears at the time but the stock convertor. Averaged right at 14 mpg.

It drops down to about 11 commuting. But, that's hard to tell for sure because of those darn 1320's on Friday nights...

------------------
82 Berlinetta, orig V-6 car, now w/86 LG4/TH700R. 2.93 limited slip. Cat-back from '91 GTA, Accel HEI SuperCoil. AMSOIL syn lubes bumper-to-bumper. Daily driver, work-in-progress (LG4 w/LB9 block, ZZ3 cam and intake, WP 305 heads ported & polished, Hooker headers & y-pipe, hi-flow cat).
57 Bel Air, my 1st car. 0.030 over 396, Weiand Action+, Edelbrock 1901 Q-Jet, Jacobs Omnipack, 1-3/4" headers, TH400 w/TCI Sat Night Special conv & shift kit, 3.08 10-bolt, AMSOIL syn lubes bumper-to-bumper. Best 15.1 @ 5800' Bandimere. Daily driver while Camaro was being put together.

 

what i would do to my car if there were no emissions tests where i live. can you say zz502?

 

Before I changed gears from 3.08, I was getting 13-14mpg. Withe 4.11's I am doing good for 10. And thats a 355.

Later
John

------------------
82 Firebird,355,Cam 224/234, .466/.488,TH350 Tranny,650 HolleyDP,Hooker Headers(I.E. POS) Manual steering
Best 8th et 8.62@80mph.
NEW for 01
A 408,dart iron eagle heads,street dominator intake, 750 SD,cam 229/239, .497/.520, Also a big hole in the hood.
Shooting for 12's.

 

There is only two places where they have emission testing in Canada. 1) The Lower Mainland of BC which uses the dyno and has levels lower than even California and 2) I believe in the lower part of Ontario around Toronto. This was suppose to be put in a few years ago and I am no sure if it was ever brought in and if so what their standards are or method of testing.

There is increasing pressure for Canada to do more emission testing from the US EPA, but given the remoteness of some areas and limited population it doesn't make sense for someone in the Yukon to emission test his truck when he uses his snowmobile just as much, if not more. Also, regulations regarding automobiles are currently a provincial jurisdiction, not federal.

I doubt the government of Alberta is going to risk political defeat bringing in emission testing when the major cities are located on flat regions and any air pollution is quickly blown away. Vancouver and the Lower Mainland of BC is trapped around mountains and is very similar to Los Angelos in how the pollution gets trapped and lingers for days.

 

I get around 8 mpg in town and that's with a 427 & T400 with 3.27 gears and 26in tires. It only gets worse from there

Miles

------------------
88 427 Camaro
12.18 @ 113mph 1.75 60ft

www.koolmeister.com

 

I live 100 km north of Toronto. This will be our first year of emmision testing. Cars that are required to be test are from 3 years old to 20 years. My z28 is an 82. I have to get it tested this year. Since this is the first for our area the first test will cost $39 cdn. If you fail then the testing centre is supposed to give you a list of possible problems. A retest is to cost no more then $15. If you fail this test then you can pay a one time fine/fee of $200 which will give you an emission's pass until the next time.

 

with a street strip 454 i was getting 6 mpg on the highway ( the 850 double pumper didn't help economy) a mild converter and gears will help, but don't expect much over 12 mpg

 

This car gets about 15 on the highway and about 12 around town, with 3.42 gears...




IMHO, if you have a big block car, you have to learn to consider yourself being above trivial things like gas mileage

------------------
"So many Mustangs, so little time..."
ICON Motorsports

 

Check out www.Rancefi.com He custom makes manifolds for all applications and his systems rock! My cousins 351 windsor averaged about 21 mpg in the city. I am putting accell DFI in the car with the new motor.

------------------
1989 GTA TRANS AM
Was a TPI 305 & t-5 car.
Is now 383 stroker w/ the same T-5
World products Sportsman II heads. Lunati pistons and custom ground camshaft. Will dyno after the break in but is estimated at 450 hp and 520 ftlbs. The T-5 is on a suicide mission.

[This message has been edited by GTARob (edited February 25, 2001).]

 

In Toronto, Emissoins testing is highly debated. Some even talk of scrapping the system since most shops are failing people on purpose for more coin. A buddy of mine has an 87 rx7. He failed twice from the same guy and finally brought to a different place. The guy purged the sniffer and used a LOWER gear and the rx7 passed. Apparently, those rottary rx7's run a little more rich in the lower RPM band...

My 89GTA passed with no problems with no AIR, a high flow cat and the mods below. They didn't even open my hood AT ALL.

Steve

------------------
89 GTA G92
305 TPI WC 5spd w/3.45
Accel Cap & 8mm Taylor's
Custom 4" Cold Air Induction
Jet Airfoil
K&N Airfilter
160 deg stat/fan switch TB Bypass - Steel Rad
Cat back 3" Exhaust w/Terminator Muff.
HiGh FlOw Dynomax Cat
Spohn LCA's - KYB GR-2's
Autometer Vac+Oil Temp

 

Stock 71 Impala convt.
402BB 400TH tranny
10mpg baby!

------------------
Rob P
89RSconvtZZ4TPI
Edelbrock Hi-Flow Intake
SLP Dual Cold Air Intake
1 5/8" Headers
Semi-Siamesed Runners
MSD6AL/relocated MAT/ AdjFPR/IROC frnt@rear swaybar/wonderbar/steeringbox/alum drvshaft/ Alston SFC/3:23posi disc rear/MAC LCA/H.Adams Panhard Rod/KYB struts/ shocks/
92Z28convt5spd
71Impala convt 402BB
BETTER DRIVING THRU SUPERIOR HORSEPOWER!

 

OK... a lot of you guys are going to think I failed math... well I did, but i can divide. My 71RS with 460 th400 3.42's and crazy roller cam (688"lift) got about 17 to 18 mpg. Car weighs 3770lbs. 750 Holley.
I used to daily drive this car but still spent 50 a week in gas when it was a buck a gallon. Sucked!
What a lot of people don't realize is that your peak torque should be right at your cruise RPM or real close for optimum mileage. For me that was at 3K RPM'S (also 80 mph) Now that I put a 200 4R trans in it that is probably going to go down a bit.
It seems that everyone is afraid of big blocks and overdrive... don't hook and it should live fine.