Hi All!
I am looking for a little more power out of my stock 318. I have a 74 Charger with a 318. The only thing I have added is duel exhaust. I am looking to get a little more power WITHOUT changing the cam. Any recommendations for what kind of intake and carb I can swap out? Looking to add a 4 barrel carb.
Been there, done that….
For sure, ether a factory 4bbl intake (CHEAP!) or a Edelbrock Performer. Not the RPM.
(The RPM does work very well on my 5.9 w/headers as the only upgrade but not as great on the smaller 318, IMO, skip the RPM for your application.)
OR if you can find an Edelbrock LD4B. A Weiand Action Plus would be my last choice and intake fitting the job description above. I would not bother with other intakes myself.
On a carb, a factory TQ is the best performer easy, BUT! The tuning rods and jets are ether stupidly expensive in kits found on EBay or just expensive part to purchase by part by part on a new purchase. I also would not run any TQ ether. It would have to be an early one or a truck carb. The lack of vacuum ports is what your after. If you can source a good TQ without an EGR vacuum & purge port found on the base of the carb, those are the ones I would use IN ADDITION TO a small primary @ 1.38.
Enough of the TQ. On to what is currently available and new, along with tuning parts at the ready.
Through testing myself, I have personally mounted (Both 600 cfm carbs) a Holley 1850, a Edelbrock AFB. Both
performed equally on my ‘79 - 318 with only headers and a Crane cam @ 218/226-.454/.480-112.
(The duration @.050 works well with a stock converter FWIW.)
A very mild cam indeed. Besides an orange box ignition, all else was stock in a ‘74 Duster, 904/3.21 gears on stock tires.
Choose the carb your most familiar or comfortable with.
Just use a thick gasket under the carb to keep it cool so the fuel doesn’t percolate. This gasket can be sourced from Edelbrock. There around .333 thickness or so.
What gear ratio and tire size does the car have?
What’s the cars weight?
The next improvement in acceleration would be gears and a higher stall torque converter. A good quality converter can have a stock feeling when driving. Even at a 4500 rating. Not that you would need a 4500 converter! LOL!
Should you ever do headers, only bother with Doug’s headers, best for your application or TTI headers, for a more robust and aggressive engine.