LT1 Carb Setup
Launching!
Joined: Mar 2004
Posts: 299
Likes: 0
From: Elwood, IL
I had a hard time reading this thread for some reason.
I went to a carb 3 years ago. I org. had a 355 with a GM dual plane intake. which is the only bolt on (with no mods) intake. The car picked up 1.5 tenths. I was running a 850 Holley done by the Carb Shop.
I did get a Vic Jr. done for the motor. Picked up another 2 tenths.
I now am running a 385 with the same 850 carb. this motor made 612 at the crank on a dyno. A 750 would probably be big enough for your setup. If you can try both sizes you might see an improvement with the 850. This car flows 926cfm. I did try a 950 on the dyno. It did make more power and torque. I also tried it on the track. the car actually slowed down with the larger carb.
I run a MSD crank trigger and a MSD billet crank trigger distr.
I did cut the cowl back to the firewall where the carb goes. I can pull the distr. out of the motor without lowering it.
Hope it helps
ken
I went to a carb 3 years ago. I org. had a 355 with a GM dual plane intake. which is the only bolt on (with no mods) intake. The car picked up 1.5 tenths. I was running a 850 Holley done by the Carb Shop.
I did get a Vic Jr. done for the motor. Picked up another 2 tenths.
I now am running a 385 with the same 850 carb. this motor made 612 at the crank on a dyno. A 750 would probably be big enough for your setup. If you can try both sizes you might see an improvement with the 850. This car flows 926cfm. I did try a 950 on the dyno. It did make more power and torque. I also tried it on the track. the car actually slowed down with the larger carb.
I run a MSD crank trigger and a MSD billet crank trigger distr.
I did cut the cowl back to the firewall where the carb goes. I can pull the distr. out of the motor without lowering it.
Hope it helps
ken
I had a hard time reading this thread for some reason.
I went to a carb 3 years ago. I org. had a 355 with a GM dual plane intake. which is the only bolt on (with no mods) intake. The car picked up 1.5 tenths. I was running a 850 Holley done by the Carb Shop.
I did get a Vic Jr. done for the motor. Picked up another 2 tenths.
I now am running a 385 with the same 850 carb. this motor made 612 at the crank on a dyno. A 750 would probably be big enough for your setup. If you can try both sizes you might see an improvement with the 850. This car flows 926cfm. I did try a 950 on the dyno. It did make more power and torque. I also tried it on the track. the car actually slowed down with the larger carb.
I run a MSD crank trigger and a MSD billet crank trigger distr.
I did cut the cowl back to the firewall where the carb goes. I can pull the distr. out of the motor without lowering it.
Hope it helps
ken
I went to a carb 3 years ago. I org. had a 355 with a GM dual plane intake. which is the only bolt on (with no mods) intake. The car picked up 1.5 tenths. I was running a 850 Holley done by the Carb Shop.
I did get a Vic Jr. done for the motor. Picked up another 2 tenths.
I now am running a 385 with the same 850 carb. this motor made 612 at the crank on a dyno. A 750 would probably be big enough for your setup. If you can try both sizes you might see an improvement with the 850. This car flows 926cfm. I did try a 950 on the dyno. It did make more power and torque. I also tried it on the track. the car actually slowed down with the larger carb.
I run a MSD crank trigger and a MSD billet crank trigger distr.
I did cut the cowl back to the firewall where the carb goes. I can pull the distr. out of the motor without lowering it.
Hope it helps
ken
TECH Apprentice
Joined: Apr 2006
Posts: 326
Likes: 0
i have a 383 LT1, but im boosted.
im running a holley based 750 cfm blow thru
i converted a gen 1 SBC intake myself. i re-drilled the holes, and i made angle washers.
depending on your air cleaner, you could probably do a stock hood
im running a holley based 750 cfm blow thru
i converted a gen 1 SBC intake myself. i re-drilled the holes, and i made angle washers.
depending on your air cleaner, you could probably do a stock hood
Launching!
Joined: Mar 2004
Posts: 299
Likes: 0
From: Elwood, IL
They are custom 1 3/4 to 1 7/8 step headers. I don't believe they would work with the stock motor mounts. I am running a mid plate also. I had the headers built after I did the motor and mid plates.
Ken
TECH Apprentice
Joined: Apr 2006
Posts: 326
Likes: 0
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