Edelbrock LD4B
- Thread starter MOPARJ
- Start date
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LXguy
Well-Known Member
That doesn't surprise me. The performer has some narrow twisty runners compared to the 4B. From the carb height, I would guess they are shorter as well. Not sure why Edelbrock went to an inferior design intake, other than maybe it fits more cars easier?
Well the distributor vacuum horn is really really close to the runner. makes timing difficult. when I upgraded to an MSD distributor i couldnt get the timing right. Removed the vacuum horn and was able to dial in the timing ( i must confess, I am not the best at doing the timing - I did get professional help - who couldn't get it done either before removing the horn)
Maybe that is part of the reason
Maybe that is part of the reason
Have to move the oil pump drive gear...
ir3333
Well-Known Member
Wow. 2010 post revived!
For the original post i'm gonna' say the LD4B won't make a noticable differance!
For the original post i'm gonna' say the LD4B won't make a noticable differance!
Good info! Curious to try ld48 and ld340 in a side by side comparison on a build I'm doing.
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ChargerKG
Active Member
No mention of these? Any Good? Early 1980's 318 Streetmaster from Edelbrock. Looks like a short torker. Gotta be better than stock 273 cast.
"As I understand the LD4B manifold was designed for use on the 273 back in the 60's. Port sizes on the 273 heads are smaller than your 318. Just like everything else, manifold technology has advanced in the last 40 yrs. IMHO you'd be stepping backwards switching manifolds."
Absolutely incorrect. 273 and 318 heads have the same port size.
Absolutely incorrect. 273 and 318 heads have the same port size.
rigger3006
Well-Known Member
did it on my 318 with 302 heads , ld340 was noticeably better, my experience anyway
David Chan
Active Member
I have managed to get an LD4B intake. Right now I'm using a 500 cfm Edelbrock. Do you think that's enough carb? Seems like a lot of people are using 600's. Haven't been able to try any engine work as It's getting some paint.
who did u last race? 'cause they blew your doors off .....
sorry... i guess i have cabin fever
Looks good. A 500 should work good on a 273 build. I have a 600 Edelbrock on mine and it works well too. If you are going for more horsepower and like to mess with tuning, you could tune what you have or try a different carb. But saying that, you may only gain a little horsepower. May-be not enough to justify the time and money.
And it might. The LD340 has bigger ports and a different port configuration.
Big Block Kris
Active Member
Does anyone know at what the power and flow range is of the LD4B intake? I am looking at cam specs and convertor stall speeds for a 273hp and Eldenbrock tech says they don' have them.
Actually 273 ports are the same size or larger than 318 heads. They are actually the same heads, but the older heads are a little cleaner and flow a little better. LD4B is better, new is not always better.
Yes they do work and for the haters, there are better manifolds out there I bet, but day in and day out, The LD4B is a great manifold. (as you well know) A friend built a fairly mild .030 over 440 with a custom grind Comp cam, warmed over stock heads, headers and a CH4B intake (like the LD4B) It made 497 horse and 520+ torque. And it fit under his fresh air hood without mods and pulls like a freight train.
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