Here's a good question

Michael Kilduff · 11-14-2010, 11:38 AM

Rayfin,

You may get better economy with a 305. 25 years ago GM went to that engine for emissions and economy-the school of thought, at least back then, was a longer stroke and smaller bore produced better economy. I don't know what the school of thought is today in regards to economy.

A quadrajet or spreadbore carb utilizing small primaries will probably be a more economical carb than would a 2 barrell. The 2 barrell will probably have bigger jets than will the primary side of a spreadbore carb set up for everyday driving/economy.

Also the bigger the tires the more economy will suffer.

Hope some of this helps!

rayfin · 11-15-2010, 04:05 AM

I appreciate that. Like I said I never worried about mileage before. I was wondering what mods I should do if any. I wonder if a beefed up 305 would get better mileage than a stock 350. I decided on a performer intake and either a quadrajet or edelbrock 600. I have both. I suppose small tube headers would help a lot. Compression would help. I wonder about valve and port size also...I guess I'll experiment. THANKS for the advice. I know this isn't the best place to ask but you guys know your stuff.

Found an aluminum water pump today for $40. This should be a fun project.

trikbag406 · 11-20-2010, 09:39 PM

Hey Rayfin,another thing,if you use an EGR valve,with the proper thermal vacuum switch (usually in the waterneck,usually broken/disconnected on most 'beaters),it will save you a little gas.The truck will run partially on unburnt exhaust gas during coast/decelleration.An Edelbrock Performer w/EGR would be good,or an old Edelbrock SP/2P (I mean OLD) w/EGR would be even better.If I think of anything else I'll post it.-Lew.

rayfin · 11-21-2010, 03:04 AM

"usually in the waterneck,usually broken/disconnected on most 'beaters"

I wondered what all that bull**** on the water neck was...cool.

trikbag406 · 11-21-2010, 10:30 PM

Quote:

Originally Posted by rayfin

"usually in the waterneck,usually broken/disconnected on most 'beaters"

I wondered what all that bull**** on the water neck was...cool.

LMAO!!!

rayfin · 11-25-2010, 01:38 AM

Can we move this thread to the "nobody gives a ****" section?

11-14-2010, 11:38 AM	#1
Michael Kilduff Member Join Date: Sep 2008 Location: Carolina Beach, NC Posts: 281 Likes: 0 Liked 0 Times in 0 Posts	Re: Here's a good question Rayfin, You may get better economy with a 305. 25 years ago GM went to that engine for emissions and economy-the school of thought, at least back then, was a longer stroke and smaller bore produced better economy. I don't know what the school of thought is today in regards to economy. A quadrajet or spreadbore carb utilizing small primaries will probably be a more economical carb than would a 2 barrell. The 2 barrell will probably have bigger jets than will the primary side of a spreadbore carb set up for everyday driving/economy. Also the bigger the tires the more economy will suffer. Hope some of this helps! __________________ IHRA STK 932 O/SA

11-15-2010, 04:05 AM	#2
rayfin Member Join Date: Mar 2009 Location: sioux city Posts: 134 Likes: 1 Liked 0 Times in 0 Posts	Re: Here's a good question I appreciate that. Like I said I never worried about mileage before. I was wondering what mods I should do if any. I wonder if a beefed up 305 would get better mileage than a stock 350. I decided on a performer intake and either a quadrajet or edelbrock 600. I have both. I suppose small tube headers would help a lot. Compression would help. I wonder about valve and port size also...I guess I'll experiment. THANKS for the advice. I know this isn't the best place to ask but you guys know your stuff. Found an aluminum water pump today for $40. This should be a fun project. Last edited by rayfin; 06-25-2011 at 10:22 PM.

11-20-2010, 09:39 PM	#3
trikbag406 Junior Member Join Date: Oct 2010 Location: Newport,Delaware Posts: 16 Likes: 0 Liked 1 Time in 1 Post	Re: Here's a good question Hey Rayfin,another thing,if you use an EGR valve,with the proper thermal vacuum switch (usually in the waterneck,usually broken/disconnected on most 'beaters),it will save you a little gas.The truck will run partially on unburnt exhaust gas during coast/decelleration.An Edelbrock Performer w/EGR would be good,or an old Edelbrock SP/2P (I mean OLD) w/EGR would be even better.If I think of anything else I'll post it.-Lew. __________________ Tranquility base,the Vega has landed...

11-21-2010, 03:04 AM	#4
rayfin Member Join Date: Mar 2009 Location: sioux city Posts: 134 Likes: 1 Liked 0 Times in 0 Posts	Re: Here's a good question "usually in the waterneck,usually broken/disconnected on most 'beaters" I wondered what all that bull**** on the water neck was...cool.

11-25-2010, 01:38 AM	#6
rayfin Member Join Date: Mar 2009 Location: sioux city Posts: 134 Likes: 1 Liked 0 Times in 0 Posts	Re: Here's a good question Can we move this thread to the "nobody gives a ***" section? Last edited by rayfin; 11-25-2010 at 01:40 AM.*

Thread Tools
Show Printable Version Email this Page
Display Modes
Switch to Linear Mode Hybrid Mode Switch to Threaded Mode