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AcampoDave · 11-14-2022, 07:34 PM

I am using an Edelbrock 1403 atop an Performer EPS manifold. The 1403 comes out of the box jetted quite rich. According to Edelbrock, It's for "perfomace applications on 305 and smaller engines or dual quad applications." You may have noticed in this thread http://67-72chevytrucks.com/vboard/s...d.php?t=838553 that I have it leaned out 8 percent on the primaries (a jet change) and currently 4 percent on the secondaries. Like the thread says, I need to blast it full bore up a steep hill and depending on my AFR at that point I may try another 4 percent leaner yet on the secondaries.

Edit:I do have a stock 283 as well and it still runs its original type Rochester 2 jet on the original intake and it is a joy to drive too. Is it "fast? Not in a brute power sense of course, but it is peppy and it will hustle with its 3 on the tree tranny and 3.08 rear gears. It still has the light duty 3 piece drive shaft and drum brakes so those limitations make it plenty powerful enough.

BTW if you look in that thread, you can see my old pitted ramhorns wearing a nice coat of Jet-Hot in the "Silver Polish" finish.

11-14-2022, 07:34 PM	#30
AcampoDave Registered User Join Date: Feb 2013 Location: central California Posts: 2,733	Re: Engine Removal Prep Questions/Advice I am using an Edelbrock 1403 atop an Performer EPS manifold. The 1403 comes out of the box jetted quite rich. According to Edelbrock, It's for "perfomace applications on 305 and smaller engines or dual quad applications." You may have noticed in this thread http://67-72chevytrucks.com/vboard/s...d.php?t=838553 that I have it leaned out 8 percent on the primaries (a jet change) and currently 4 percent on the secondaries. Like the thread says, I need to blast it full bore up a steep hill and depending on my AFR at that point I may try another 4 percent leaner yet on the secondaries. Edit:I do have a stock 283 as well and it still runs its original type Rochester 2 jet on the original intake and it is a joy to drive too. Is it "fast? Not in a brute power sense of course, but it is peppy and it will hustle with its 3 on the tree tranny and 3.08 rear gears. It still has the light duty 3 piece drive shaft and drum brakes so those limitations make it plenty powerful enough. BTW if you look in that thread, you can see my old pitted ramhorns wearing a nice coat of Jet-Hot in the "Silver Polish" finish. Last edited by AcampoDave; 11-14-2022 at 08:02 PM.