So the 305 blew last week ... - The 1947 - Present Chevrolet & GMC Truck Message Board Network

Yankeelights · 09-22-2007, 08:23 PM

... and the 406 that I was building for it is half way complete. Due to budget constraints, I now have no choice but to drop in my other 406 that I used to run back in the early 90s ... a bitter sweet reunion, but sometimes ya gotta say WTF.

This engine, built by Brustle Competition Engines in Philly (1989) used to propel a station wagon down the quarter at 12s ... until the frame cracked. Out came the engine and to the scrap yard the station wagon went. I've been dragging this ol' beast around with me since 1994 "just in case" I decided to build another bracket car. So much for the bracket car idea.

I'm not looking forward to buying premium gas but at least my truck won't labor to climb these NW PA mountains anymore.

Has anyone tried mixing their own high octane gasoline? I just filled the tank with 87 octane and this 406 will NOT like it. I was going to try about 20% xylene.

Srubydo1986 · 09-23-2007, 05:50 PM

well there always moonshine.

but as for mixing my own i kinda left that to the gas station i dont want to blow up

swb85 · 09-24-2007, 09:42 AM

Quote:

Originally Posted by Yankeelights

Has anyone tried mixing their own high octane gasoline? I just filled the tank with 87 octane and this 406 will NOT like it. I was going to try about 20% xylene.

Never mixed it with 87 octane, but here's the chart the guys around here use for premium fuel:

Formula #2 - Xylene
R+M/2 (octane).........117
Mixtures with 92 Octane Premium
10%...........94.5 Octane
20%...........97.0 Octane
30%...........99.5 Octane

Looks like ~20% xylene should get ya in the ballpark.

Hoods69BadBowTie · 09-24-2007, 04:49 PM

Thats suxs about the motor blowing but sounds like u got a good 1 to go in there now.

Yankeelights · 09-24-2007, 09:34 PM

Quote:

Originally Posted by swb85

Looks like ~20% xylene should get ya in the ballpark.

Kool, thanks for the formula. I'll cut back on timing if I have to until I fill 'er up again with premium.

Yankeelights · 09-24-2007, 09:38 PM

Quote:

Originally Posted by Hoods69BadBowTie

Thats suxs about the motor blowing but sounds like u got a good 1 to go in there now.

Yeahhhhhhhh, It's a drag, but I can't complain. That 305 has 271,000 miles on it and for a 305 that amazes me. The truck never left me stuck either. It's still running, it just sucks going uphill.

The ol' race 406 should get me by for a while until I finish the one in progress.

**Palf70Step** · 09-24-2007, 10:08 PM

WE use to mix our own in Western Pa (70s), but then we had to worry about the revenuers

09-22-2007, 08:23 PM	#1
Yankeelights Registered User Join Date: Jun 2007 Location: NW Pennsylvania Posts: 92	So the 305 blew last week ... ... and the 406 that I was building for it is half way complete. Due to budget constraints, I now have no choice but to drop in my other 406 that I used to run back in the early 90s ... a bitter sweet reunion, but sometimes ya gotta say WTF. This engine, built by Brustle Competition Engines in Philly (1989) used to propel a station wagon down the quarter at 12s ... until the frame cracked. Out came the engine and to the scrap yard the station wagon went. I've been dragging this ol' beast around with me since 1994 "just in case" I decided to build another bracket car. So much for the bracket car idea. I'm not looking forward to buying premium gas but at least my truck won't labor to climb these NW PA mountains anymore. Has anyone tried mixing their own high octane gasoline? I just filled the tank with 87 octane and this 406 will NOT like it. I was going to try about 20% xylene.

09-24-2007, 04:49 PM	#4
Hoods69BadBowTie Chevys Kick A$$ Join Date: Jan 2005 Location: Zootown, MT Posts: 12,699	Re: So the 305 blew last week ... Thats suxs about the motor blowing but sounds like u got a good 1 to go in there now. __________________ HOODS is what I answer too -'79, '77, '88 Pickup Sold, '85 Camaro, '83 T/A, '81,'83,'90 K5 Blazer All Sold -'79 3/4 ton "Big Yellow Bananna" Lifted 4spd. 39.5 TSL Swampers, The money Pit -'86 K5 Blazer Silverado 6.2 4" lift 35"s -'95 Ext. Cab Shorty 4" Tuff Country rolling 35" M/T's -'83 Monte Carlo T-Tops. 126,500 Original Miles -LATER I would rather push a Chevy then drive a ford!!

09-24-2007, 10:08 PM	#7
Palf70Step State of Confusion! Join Date: Jul 2002 Location: Gulfport, MS USA Posts: 47,223	Re: So the 305 blew last week ... WE use to mix our own in Western Pa (70s), but then we had to worry about the revenuers __________________ Bill 1970 Chevy Custom/10 LWB Fleetside 2010 Toyota Tacoma PreRunner SR5 Double Cab - DD Member of Louisiana Classic Truck Club (LCTC) Bill's Gallery Life isn't tied with a bow, but it's still a gift. Live simply. Love generously. Care deeply. Speak kindly. Leave the rest to God!

09-23-2007, 05:50 PM	#2
Srubydo1986 The Crazy Machanic Join Date: Jan 2007 Location: Nokesville Va Posts: 1,437	Re: So the 305 blew last week ... well there always moonshine. but as for mixing my own i kinda left that to the gas station i dont want to blow up __________________ 1986 Sliverado longbed 400 small block mean as hell, 700r4 trans (5 speed coming one day) 1970 chevelle 2dr sedan Latest update June 24 2007. *1957 4 door stationwagon - pink all original needing a good restore (body great, floors bad) newest additions 1965 shortbed fleet great granddads. Been told im nuts to bring it back from the dead (still going to happen) plans-all stock with a turbo 292 inline 3 speed column shift. and thats it big block 427 and 5 speed trans and ford 9 inch theyhave no home yet thinking what to put them in and a 79 c60 trash truck um no idea i have one



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