Well I'm out of ideas. I have a 83GSL with a S3 13b. 45dcoe short velocity stacks, 40mm chokes, gr8 jetting. RB upper intake manifold. RB Header and presilencer & custome exhaust, Rotary Performance underdrive pulley, MSD-DIS, br8eix plugs, msd plugwires, K&N air filter, Holley blue & regulator. Recently got a lower manifold to port. Well What else can I do besides engine porting, Nitros, and forced induction to achieve more power. I want to have everything done before I port and forced induction.

 

Damn you are running out of options like me....

These won't give you hp but will help... Lightweight flywheel, gears, weight redux, suspension.

 

Sounds like you have most bolt on/external mods covered. your only option now is lots of stickers...........

 

Yea suspension is sitting in a box waiting to go in the car, weight reduction has started, and my tranny is going so a second gen one is in the worx.

 

Would it be worth swapping the 45 dcoe to a 48? I don't have any experience with a 45 so I don't know the difference.

 

Well from my understanding they are both the same case. The 48 is just a bored out 45 with bigger butterflys. Most people run 38mm chokes in a 48 and the same in a 45, but I run 40's to hopefully make up for the difference. This is just my estimation, but I don't know exactly. I'd like to know for sure. And as far as I know there is noone running a weber stock port running as fast as I am. 14.6@91 w/ 2.0 60ft. and 140rwhp. And thats with a slipping stock clutch.

 

I know this is off topic, but about how quick is your car. I have a similar setup, and I think it has way less power than it should. I have a 76-78 13b with a 45dcoe and RB manifold. K&N filter. RB header and 2.5" custom exhaust. NGK plugs wires, holley red and regulator. I'm only hitting like 84-86mph in the quarter and top speed kind of dies off at about 110.

What is gr8 jetting? or are you just abbreviating great? If not can you tell me what jets you're using.

 

Well the post before me didn't show up when I did my original reply. Disregard everything in it except for the jetting part.

 

You will need to port the engine. Ater that comes turbo, etc. On a stock engine, w/ man sec, a RB header & exaust is only the 1st step for 20 hp gain max.

 

Well find out in spring time!!! Ive tweaked the weber and it runs like a bat ouf of hell now! Way way way faster then when I ran the 15.6. My god what a difference tuning makes!!

 

60f9 idel jets, 45 acellerator jets, f11 etubes, 180 mains, and 170 air correctors and 40mm chokes. I want to up to 65 f9 idel jets, 50 or 55 accellerator jets and 185 main jets... Then again for your set up it will be different. I have a 6 port 13band you have a 4 port. Our timing is way different and has different fuel requirements. And for Hornbm when I ran the 14.6 i was 135rwhp, last time i dynoed it it was 140rwhp, and its faster with more parts now, and much lighter So I'll be faster too...

 

hey just so ya know, I used to have 65F9 idle jets and it runs WAY WAY better with the 60F9's. But yeah mine is a 48mm, and yours is a 45

 

You're running 38mm chokes right? I need the added fuel to compinsate for the loss of velocity with the 40's. Plus after finishing my ignition the thing started running really lean down low I had to turn the screwes way out. It idel its really rich and durring cruize it really leans out. lol. Thats what was happening when I first put the carb on and was running 55f8. HA! They were turened out like 8 turns then and now they're out likr 5.5-6 turns and should onl be 2-3 turns out. Lol. What jets do ou have that you're not running I might be interested in snagging them from you if they're up for grabs... I want to sart a huge collection of jets. For all crazy set ups.

 

Also my sleves are pulled as oposed to yours just being wired open. I couldn't get those darn rods out though. DOH!

 

I got some 65F9 idle jets and some 165 mains. Both worthless!

Man mine is like 2 turns out, and sounds perfect. I found a little trick today that made it WAY WAY torqier, and I'll tell you it after we have our dyno face off!

Honestly I still havent check what size chokes I have. Im running 180 main jets, F11 emulsion tubes, 160 air correctors 60F9 idle jets. I belive robert at rotary shack modiefies the something in the acceleratopr pump, im not sure what it is, but I havent even checked what jets are in there. No boggin problems so I dont see a need ot screw with the pump jets yet.

Im considering taking my air correctors up to 170s. THis would be way easier with an air fuel gauge.

 

Well I want the 65f9's if you'll part with them! And the gague makes it alot easier!! I chumped out and got one!

 

i dunno, the old assometer has been pretty acurate so far LOL

 

Well what ever works!!