weber IDA tuning
08-17-06, 08:48 AM
#1
What could possibly go wr
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weber IDA tuning
where should I start?
Right now Ibelive it is factory jetted
37mm chokes
f7 e-tube
70f10 idle jet(120 holder)
120 air corrector
135 main jet
200 needle valve
These are so very wrong for what I need
the IDA 48 is feeding a 1/2 bridge 12a with RB full exhaust and stock ignition (until I get that direct fire mod done)
Any one got something similar?
Should I jet it more like a bridge port or a street port, I was thinking of going half way but I probably wont work right still but may be better
I've heard that I'll need an f11 e-tube for starters
Iwas thinking of trying 39or 40mm chokes, a 205 main jet and a 160 air corrector,
and no idea at all of what to do with the idle jet, and I need to tap in a 3.5mm needle valve right or am I confused again.
this is just a guess at numbers that I made from looking at a street port and a bridgeport jetting guide.
I feel like Im at school with all this reading and stuff I hate school but this is kinda fun.
Right now Ibelive it is factory jetted
37mm chokes
f7 e-tube
70f10 idle jet(120 holder)
120 air corrector
135 main jet
200 needle valve
These are so very wrong for what I need
the IDA 48 is feeding a 1/2 bridge 12a with RB full exhaust and stock ignition (until I get that direct fire mod done)
Any one got something similar?
Should I jet it more like a bridge port or a street port, I was thinking of going half way but I probably wont work right still but may be better
I've heard that I'll need an f11 e-tube for starters
Iwas thinking of trying 39or 40mm chokes, a 205 main jet and a 160 air corrector,
and no idea at all of what to do with the idle jet, and I need to tap in a 3.5mm needle valve right or am I confused again.
this is just a guess at numbers that I made from looking at a street port and a bridgeport jetting guide.
I feel like Im at school with all this reading and stuff I hate school but this is kinda fun.
08-17-06, 08:55 AM
#2
start with
42 venturies
150 or less air jet
f11
70+ idle jet
300 needle/seat or grose jet
Run a 2.25 dual pipes into 1 muffler with no RB presilencers OR 1 2.5 single exhaust.
junk the IDA's inlet fuel filter
42 venturies
150 or less air jet
f11
70+ idle jet
300 needle/seat or grose jet
Run a 2.25 dual pipes into 1 muffler with no RB presilencers OR 1 2.5 single exhaust.
junk the IDA's inlet fuel filter
Last edited by Siraniko; 08-17-06 at 08:58 AM.
08-17-06, 09:14 AM
#3
What could possibly go wr
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I have the dual presilencer and single exhaust "street port exhaust" from RB
So the main jet around 200 will be fine?
300 seat/needle or grose jet which is better/ whats the difference
I"ll get the air jets from where i am up to 150
will the 42mm chokes kill all my low end, or leave me enough to still drive in traffic?
So the main jet around 200 will be fine?
300 seat/needle or grose jet which is better/ whats the difference
I"ll get the air jets from where i am up to 150
will the 42mm chokes kill all my low end, or leave me enough to still drive in traffic?
08-17-06, 09:23 AM
#4
42 is the minimum I would use on a streetport. In fact, I use 44+ so I can get more mid and top end. 200 main is kinda low but dont be afraid to try different jettings.
High revving motor prefers a free-flowing exhaust. I have experienced on the exhaust also as I played with different settings such as RB set up, single exhaust and dual. If you alreay have a RB exhaust, just remove the presilencers but keep the primaflow muffler. Without the RB presilencers, its like night and day.
High revving motor prefers a free-flowing exhaust. I have experienced on the exhaust also as I played with different settings such as RB set up, single exhaust and dual. If you alreay have a RB exhaust, just remove the presilencers but keep the primaflow muffler. Without the RB presilencers, its like night and day.
08-20-08, 06:53 PM
#6
I used a 51 once in my 13-B monster streetport (the multi-colored motor that wont die in my 75 RX-3 
) . A 51 will give you a weaker low-end (over carbed) but very nice on top end. However, smaller venturies will cure it. Just remember that there is a difference between a 48 and 51 venturies.
) . A 51 will give you a weaker low-end (over carbed) but very nice on top end. However, smaller venturies will cure it. Just remember that there is a difference between a 48 and 51 venturies.
08-21-08, 04:35 AM
#7
Sure the carb was running on a 13b street port and it currently set up as follows
4Omm CHOKES, F11 EMULSION TUBES 235 MAIN JETS 120 AIR CORRECTION JETS 65 F 10 idle
i think the 40 chokes should be fine, might lower the fuel but i need to check the other parts once it arrives
also comes with spacers, orgional and large velocity stacks and a extended fuel bowl all work done by racing beat
carn't wait to get this baby on the motor
looking to go bridge port next year so it made sense to get it while it was up for grabs
looking to go premix although im sure i have seen someone use the 2 inlets on the manifold to plump the omp into (last picture) anyone done this mod?
Mark
4Omm CHOKES, F11 EMULSION TUBES 235 MAIN JETS 120 AIR CORRECTION JETS 65 F 10 idle
i think the 40 chokes should be fine, might lower the fuel but i need to check the other parts once it arrives
also comes with spacers, orgional and large velocity stacks and a extended fuel bowl all work done by racing beat
carn't wait to get this baby on the motor
looking to go bridge port next year so it made sense to get it while it was up for grabs
looking to go premix although im sure i have seen someone use the 2 inlets on the manifold to plump the omp into (last picture) anyone done this mod?
Mark
Last edited by mpk490p; 08-21-08 at 04:47 AM.
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08-22-08, 08:30 PM
#12
Medium size? From my looking all I could ever find were stock stacks, Jaycee stacks, and the EMPI stacks. I'm still trying to figure out what type of tuning Wacky's done to get his SP13B's to spin to 9k. My huge street port 13B with 48IDA falls flat on it's face at 7500 RPM. RB header and presilencer with 2.25 after the silencer under axle to a Apex N1.
08-22-08, 09:15 PM
#15
I like an aggressive start too so I always use at least a 70 idle jet (in fact, I cant remember what size I have now since I kept on drilling it to find what Im comfortable with). With the main, I will use 210 and increase your fuel pressure to 5psi. everything else are ok. if that doesnt help, then I will say its not a big streetport
08-23-08, 12:08 AM
#22
I know about weber tuning, tried it all before and know what works, here is a good reliable tune up, 42 chokes, 165 air, 225 fuel, 65 idle jets if want a smooth idle or 70 are fine, make sure float is adjusted right and you have the fuel pressure at 5 psi, this will give you great instant power up to 9,000 rpms
08-23-08, 01:39 AM
#24
Basically a port taken as far as you can go up and in, before dropping corner seals or breaking thru the casting....usually much larger than a standard streetport...especially if you can mix and match irons....like on the old school cars....
Look at a stock 13B-RE Cosmo motor.....a monster SP usually looks like that, so imagine how much porting can be done to those stock housings! A monster-ported RE block is a prime street motor! Largest ports and largest oil pump. With proper intake, exhaust, and tuning, you could easily reach the 210+rwhp mark!
Look at a stock 13B-RE Cosmo motor.....a monster SP usually looks like that, so imagine how much porting can be done to those stock housings! A monster-ported RE block is a prime street motor! Largest ports and largest oil pump. With proper intake, exhaust, and tuning, you could easily reach the 210+rwhp mark!
08-23-08, 01:40 AM
#25