What kind of gas mileage are y'all getting. Reason is I'm going to be buying a daily driver here real soon and I'm trying to decide between the V6 and 305 TBI. If the gas mileage in the 305 TBI isn't any better than the TPI's then I'm gonna go with the V6. I don't think it will be any better but i'm just checkin.
bsa

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"If they do not run, Then they will die." - Stonewall Jackson
#3
'87 IROC, 355 TPI, Converted to SD, 700R4, B&M Megashifter, 3.42, Trick Flow Twisted Wedge Heads, Edelbrock Intake, Accel Runners, Comp Cam, Crane Gold rockers, Lucas 24# injectors, Edelbrock headers, Flowmaster 3'' exhaust, Mallory Ignition, Transgo Performance Shift Kit, Corvette Servo, 2,000 Stall Torque Converter

 

I'm getting around 25mpg with my 100,000+ miles completely stock 305 TBI. I think TPI will probably get a little better.

 

Yeah.. I'm getting mid-20's as far as miles per gallon goes.

That's not stock, but.. that only includes an open-element air filter.

Proper maintenence will keep mileage up.

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89 iroc-z 305 tbi
k&n filtercharger, open element air filter. nuffin' else

 

With a hollow cat and 132K miles I was getting mid 20's and almost 30 on the freeway on long trips with the old 305TBI.

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Rob P
89RSconvtZZ4TPI
Edelbrock Hi-Flow Intake
SLP Dual Cold Air Intake
1 5/8" Headers
Semi-Siamesed Runners
MSD6AL/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!

 

17 mpg. mostly 4 mile trips to town
I ordered a cat back and am going to hollow out the cat.

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late model 91 rs
fully loaded t-tops
red leather
paint- gm red and yellow blend (light red)
custom pink rims
305 tbi 14"x3" O.E,
computer chip, accel super stock plug wires
MTX sub and amp (very loud)
vic_v8@yahoo.com

 

27+ on the freeway, about 18-20 around town. Bet it won't be that good when the 3.73's go in

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'92 firebird t-tops
305tbi,670cfm tbi, 2 1/2" Dynomax catback, 9x3 K&N open element

 

Not bad. So I'm looking at bascially between 17 and 25 around town and 25-30 freeway. OK, so at least I have a base line. Not as much as I had hoped for but a major improvement over my 8-10 mpg around town and 22-26 on the highway.
bsa

 

18 ~ 20 MPG on my 92 RS with T-5 and TBI, you won't get as good as a 6 unfortunately, close but no cigar. Funny thing I get almost as good mileage on my GTA!!

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89 GTA 350 - stock all the way. But came with goodies, 3.27, dual cats, alum shaft. Mods and Website coming soon!!!

 

Get the 5.0 TBI engine, I have had both, I bought a 89 Camaro RS with the 2.8 MPI 5-speed and it preformed pretty good for a six, but then in 92 I traded it in for a 92 RS Camaro with the 5.0 TBI 5-speed and the V-8 was a lot faster and got better gas mileage, the six clyinder cars have different gears in them and they turn more RPM all the time. I can get 29 to 31 MPG on the Hwy. @ 75 MPH with the TBI and the most the six would ever get is about 27 to 28 at the same speed, but both averaged abot 20 MPG. The V-8 will outlast the V-6 also because it does not work as hard.

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92 Camaro RS 5.0 5-Speed
14" Open Air Cleaner
3.08 Posi-trac
Edelbrock TBI Intake
Crane cam
Ported & polished stock heads 3 angle valve job
HyperTech Chip
SLP Headers (Ceramic Coated)
UltraFlo cat-back exhaust

74 Dodge Dart Sport 360 (11.2 1/4 mile)

2000 Dodge 1500 Ram Sport

[This message has been edited by DartByU (edited June 08, 2001).]

 

hmmmmmmm.........very interesting. This could lead to another V8 purchase. I was kinda apprehensive about the six.......
bsa

 

My automatic Firebird has almost 200,000 miles and Im averaging about 16-18 mpg residential. Havent checked the highway mileage for a while but last time i've checked it was about 25-26mpg.

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Shouldn't bother putting this but hey what the heck:
1988 Maui Blue Firebird 305 TBI stock (w/ 190,000+ miles and still running strong )