The Oldsmobile Connection

Brando · Joined: 06 Jun 2003 Posts: 3051 Location: Michigan, USA

c_creations wrote: BigBlockOlds wrote: As long as your 307 is a non-roller you can do a few performance modifications. If it was the roller 307 with 7A heads your pretty much stuck because no aftermarket intakes will work unless you do a head swap.

Don't bother with performance computer chips. Been there done that and they don't do anything for the CCC 307. I used a Hypertech Thermomaster chip in my old 307 and I think it actually slowed the thing down.
Since the computer doesn't control the carb at WOT there's not much for the chip to do other than adjust your timing a bit.

Some basics I would do is make sure its in good basic tune.

Check your initial timing with a timing light. I found that on my 307 it had been off by 12*! When I set the timing to 20* I found a lot more power (for a 307) than I had before. It felt like a totally different engine.
The timing could also help get rid of the dieseling.

You can play with the secondary rods on the Q-jet also. They are usually very lean and by swapping in another set you can help richen things up. You can also modify the secondary air doors on the CCC Q-jet so they open up further. From the factory they limit the 750/800cfm Q-jet to just 595cfm or so. By modifying them for full operation you'll gain more airflow.

Headers and dual exhaust will help but just don't go too big. 2.25" exhaust should be plenty for a 307.

Of course steeper rear gears would help also if you wanted to go that far too. 3.42's or 3.73's would really help get the big car moving.

The above information is mostly gained from the G-body 307's and I am unfamiliar with whether or not the same exact 307's were used in the B-body's. I would assume so but you never know.

c_creations wrote: how do i modify the ccc q-jet to its full operation and another thing what is a q-jet sorry for being so dumb but i dont know much about engines yet but im learning.

A Q-jet is your carburetor.....Quadra Jet Carburetor....

TOC Admin
Brando

BigBlockOlds · Joined: 04 Jan 2004 Posts: 171 Location: Ohio

Here is a good website that will help get you familiar with the computer system and a description of how to modify the air doors: http://www.robertpowersmotorsports.com/CCC.html

BigBlockOlds · Joined: 04 Jan 2004 Posts: 171 Location: Ohio

Also flipping the air cleaner lid is only going to get you a louder sounding engine (you'll be able to hear the secondary's kick in more) but its not necesarrily going to give you any more power.

Look at it this way, you just went from getting fresh, cool air from the stock air cleaner snorkel, to getting hot, dirty underhood air. The hot air will not make it run any better.

You also may have hood clearance problems (not sure on the underhood room of a B-body). On my '87 Cutlass I tried flipping the air cleaner lid (in my younger days) and couldn't get the hood to close. I ended up fabbing my own air cleaner top but I will tell you that all it netted me was a louder more aggressive sounding engine, which I "thought" was faster because it sounded faster. It wasn't.

86Delta · Joined: 06 Nov 2003 Posts: 281 Location: NJ, USA

yeah, hood clearance might be an issue, i tried flipping the lid on my fathers 82 caprice sedan back when i was driving that before i got the delta, didn't work. although, that car did have a Edelbrock manifold which might have been an inch or so taller than the stock intake.

88delta88 · Joined: 09 Jun 2003 Posts: 2401 Location: Canada

Yeah, I would guess that every bit of heat the engine puts out rises to the top , just to be sucked in by the mexican supercharger, so performance wise that doesnt make sense. But theoretically, the engine can breathe easier when you tromp on it, and it just sounds so cool :-) So, performance gains :thumbdown: , but loud and growly 4 barrels :thumbup:

Just for a start. If the hood dont close on top of it, forget it then... Definately not worth redesigning filter pans just to get an exposed element. But for the 10 seconds it takes you to flip it over, may as well give it a shot!!! (my opinion, especially since you're learning about engines)

I'm sure someone must know how to get massive amounts of cold, clean air into a quadrajet carb!!!

73Delta88 · Posted: Thu Jan 22, 2004 7:57 pm Post subject:

88delta88 wrote: I'm sure someone must know how to get massive amounts of cold, clean air into a quadrajet carb!!!
the best way?.... HOOD SCOOP. although I dont think that would look so good on your car, unless you put some cool wheels and raised white letter tires on it... and jacked up the back of course. :D

TheDarkShadow · Joined: 18 Jan 2004 Posts: 113 Location: Virginia Beach, VA

ok heres my .035 cents... from what i've figured out the 307 aint the best performance engine made :P but anyways.

To whomever made the comment about the 5A heads, they came on alot more then just cutlasses, basicly they came on every 307 made for certain years, until the switched to rollers *7a, blah* example: 83 delta 88, my car :)

Aftermarket intakes will fit as far as i know, since all sbo intakes are the same, just gotta worry about emissions, get a new carb also, like and edelbrock :) *like mine, although will require a 1" adapter plate + 1" spacer for throttle to clear egr valve*

As far as underhood clearance with the 'flipping the lid' it will fit just fine, myself have done that at one time, does sound cool. and you can see the hood clearance asd mine has 2" of spacers and hood kinda of closed fine, but i then went ahead and got one of them lower profile ones.

Hood scoop option, actually a w30 styyle scoops doesn't look that bad on a delta, i've seen one b4, forgot website, although they don't make them and you gotta custom fabricate your own basicly.

well, as i said, thats my .035 cents :P

Brianritchie21787 · Joined: 08 Feb 2004 Posts: 266 Location: Tolland, CT, USA

i had my air cleaner lid flipped for awhile, sounded nice... but yeah it definatly just pulls hot air off the top of the motor, especially in traffic when your at idle in the summer months... made my car feel like a slug when i romped on it... did nothing but cause my car to diesle due to the high carb temperatures and i think could be related to the failiure of my air cleaner temp sensor.
Correct me if im wrong, but flipping the air cleaner lid also throws off the egr (Exhaust Gas Recirculation) and can reduce gas milage by a noticable amount. GM designed the intake the way it is for a reason. :wink: I'e tried a making a few air cleaner mods in the past myself and the only valid one i could come up with was a good air filter and running some flexible hose to a spot where it could grab the coldest air.

-Brian-