ITB Manifolds for LS engines
10-20-2017, 09:20 AM
#1
FormerVendor
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ITB Manifolds for LS engines Hi All, I would like to have an area (sticky) that anyone could post pictures/data of ITB manifolds for LS engines.
This thread could be the start : My work is attached below.
The ITB style intake offers BEST Torque/BEST Throttle Response.
Most will state a "cool" look.
Lance
This thread could be the start : My work is attached below.
The ITB style intake offers BEST Torque/BEST Throttle Response.
Most will state a "cool" look.
Lance
10-20-2017, 12:52 PM
#3
Restricted User
I'm interested in this. I've been wanting to do a set of custom ITBS. I've found several different options for throttle bodies that are affordable. My main concern is runner shape and forming them to the intake flanges for cathedral ports.
10-20-2017, 09:17 PM
#4
10-22-2017, 11:15 AM
#5
FormerVendor
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ITB's for LS-2-C Ports Hi Joe, not sure about your request, my intake will fit LS-1/2 "C" ports.
My intake will fit LS-7 Ports, version #2.
I can sell you the bare machined castings ?
I also have "billet" ITB bases to fit the chosen head. (Weber IDA pattern)
Lance
My intake will fit LS-7 Ports, version #2.
I can sell you the bare machined castings ?
I also have "billet" ITB bases to fit the chosen head. (Weber IDA pattern)
Lance
10-22-2017, 12:45 PM
#6
A dedicated ITB sticky is an excellent idea.
One day I would like to have an ITB set up on my 91 RS's 383 LS1.
Can the stock 99-02 fbody PCM support ITB Speed Density tune that is daily driver friendly?
What are the biggest challenges to tuning an ITB set up? Could a well experienced LS tuner be reasonably expected to do tuning or a specialist with ITB experience required?
I've read 240+/240+ degree Cams can be ran with a well tuned ITB intake, is that really possible?
One day I would like to have an ITB set up on my 91 RS's 383 LS1.
Can the stock 99-02 fbody PCM support ITB Speed Density tune that is daily driver friendly?
What are the biggest challenges to tuning an ITB set up? Could a well experienced LS tuner be reasonably expected to do tuning or a specialist with ITB experience required?
I've read 240+/240+ degree Cams can be ran with a well tuned ITB intake, is that really possible?
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10-23-2017, 10:07 PM
#8
Can the stock 99-02 fbody PCM support ITB Speed Density tune that is daily driver friendly?
What are the biggest challenges to tuning an ITB set up? Could a well experienced LS tuner be reasonably expected to do tuning or a specialist with ITB experience required?
I've read 240+/240+ degree Cams can be ran with a well tuned ITB intake, is that really possible?
10-23-2017, 10:17 PM
#9
Restricted User
I found a place that can supply a set of 60mm throttle bodies for $250. I could also attempt to use motorcycle ITBs in order to save on costs while I do testing.
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DACTARI (12-18-2021)
10-26-2017, 03:51 PM
#12
I was initially and will confirm when its rolling again, but having the SS hood does move some air across the intake. What kind of heat is back there to inhale is still unknown....does breath better than a boxed filter system (Harrop). Venting the cowl (no wipers with mine) is another consideration in heat dissipation.
11-10-2017, 09:05 AM
#13
My other concern was a lack of filters. Some that do ITB's are a weekend warrior/show car.
If I did it, I would drive my car A LOT. My 95 Z is a DD and autocross toy. I always like the idea of being different and custom fabrication.
If I did it, I would drive my car A LOT. My 95 Z is a DD and autocross toy. I always like the idea of being different and custom fabrication.
11-13-2017, 06:38 AM
#15
I'm toying with the idea of making one foe a LT1. I just laid out a intake gasket in which to design a plate for bolting to the head.
Find some throttle bodies, hook them up and done!....right? LOL It's going to be a loooong project.
Find some throttle bodies, hook them up and done!....right? LOL It's going to be a loooong project.
11-13-2017, 07:43 AM
#16
TECH Enthusiast
1. Heat soak
2. Filtration - people do not want to run proper filters that flow to meet performance needs, so they run ones that look good (hence the reason they got ITB setup) but kill performance. Those aesthetically pleasing, little individual filters are proven to choke 100+ hp on 427+ ci motors
3. Tuning - in general getting them to work well with the linkages and air/fuel adjustment (in-depth understanding of specific product is needed). Then again, the heat soak and filtration plague them
11-13-2017, 09:53 AM
#17
My approach is less for looks...well it would be cool to see one that works properly. Friend of mine that owns a shop has tuned a couple of ITB setups before and knows the challenges. This will no doubt be a tricky project.
My initial thought will be to make plates that bolt to the heads. Calculate proper runner length then stuff throttle bodies on the runners. Wiper cowl/hood clearance will be a major issue but IMO will be cut to fit a proper runner. Custom cowl hood may be in order as well (which can solve heat soak issues if you cut holes in the hood to allow runners only to protrude). Linkages will be another undertaking plus dealing with MAP/IAT sensors and having proper vacuum ports.
It would be very cool to see, but if the reward is not worth the hassle then I may pass. I don't like doing things that aren't worth it. I'm running SD with a custom fiberglass elbow connected to 4" aluminum pipe with a filter in the driver side fender...if the ITB setup nets zero gains I would not be happy.
My initial thought will be to make plates that bolt to the heads. Calculate proper runner length then stuff throttle bodies on the runners. Wiper cowl/hood clearance will be a major issue but IMO will be cut to fit a proper runner. Custom cowl hood may be in order as well (which can solve heat soak issues if you cut holes in the hood to allow runners only to protrude). Linkages will be another undertaking plus dealing with MAP/IAT sensors and having proper vacuum ports.
It would be very cool to see, but if the reward is not worth the hassle then I may pass. I don't like doing things that aren't worth it. I'm running SD with a custom fiberglass elbow connected to 4" aluminum pipe with a filter in the driver side fender...if the ITB setup nets zero gains I would not be happy.
11-13-2017, 10:21 PM
#18
3 major issues for ITB setups
1. Heat soak
2. Filtration - people do not want to run proper filters that flow to meet performance needs, so they run ones that look good (hence the reason they got ITB setup) but kill performance. Those aesthetically pleasing, little individual filters are proven to choke 100+ hp on 427+ ci motors
3. Tuning - in general getting them to work well with the linkages and air/fuel adjustment (in-depth understanding of specific product is needed). Then again, the heat soak and filtration plague them
1. Heat soak
2. Filtration - people do not want to run proper filters that flow to meet performance needs, so they run ones that look good (hence the reason they got ITB setup) but kill performance. Those aesthetically pleasing, little individual filters are proven to choke 100+ hp on 427+ ci motors
3. Tuning - in general getting them to work well with the linkages and air/fuel adjustment (in-depth understanding of specific product is needed). Then again, the heat soak and filtration plague them
11-13-2017, 10:24 PM
#19
My approach is less for looks...well it would be cool to see one that works properly. Friend of mine that owns a shop has tuned a couple of ITB setups before and knows the challenges. This will no doubt be a tricky project.
My initial thought will be to make plates that bolt to the heads. Calculate proper runner length then stuff throttle bodies on the runners. Wiper cowl/hood clearance will be a major issue but IMO will be cut to fit a proper runner. Custom cowl hood may be in order as well (which can solve heat soak issues if you cut holes in the hood to allow runners only to protrude). Linkages will be another undertaking plus dealing with MAP/IAT sensors and having proper vacuum ports.
It would be very cool to see, but if the reward is not worth the hassle then I may pass. I don't like doing things that aren't worth it. I'm running SD with a custom fiberglass elbow connected to 4" aluminum pipe with a filter in the driver side fender...if the ITB setup nets zero gains I would not be happy.
My initial thought will be to make plates that bolt to the heads. Calculate proper runner length then stuff throttle bodies on the runners. Wiper cowl/hood clearance will be a major issue but IMO will be cut to fit a proper runner. Custom cowl hood may be in order as well (which can solve heat soak issues if you cut holes in the hood to allow runners only to protrude). Linkages will be another undertaking plus dealing with MAP/IAT sensors and having proper vacuum ports.
It would be very cool to see, but if the reward is not worth the hassle then I may pass. I don't like doing things that aren't worth it. I'm running SD with a custom fiberglass elbow connected to 4" aluminum pipe with a filter in the driver side fender...if the ITB setup nets zero gains I would not be happy.