ITB setup opinions?
#1
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ITB setup opinions?
For the past couple of months I have been looking into an ITB setup for my car. I understand I can make way more power on a turbo setup, but to me it's about more than making BOOSTED power. I really like the idea of an engine bay that is pretty basic. If I went ITB, I would have a header, and no more big bulky intake manifold. I would have no intercooler, no intercooler piping, no BOV....just a cleaner, basic engine bay.
There are questions I still have no answers for about a setup like this.
1) How would I tune with with my MS if the intake runners are so short? I mean, how do I get a proper vacuum signal?
I asked that question to Jenvey, and they said that I would need to tune by throttle position and crank position. What???
2) What kind of fuel mileage could I expect with ITB's? I got 26mpg stock, I get about 29mpg turbo'd.
3) How do ITB's behave on a daily driven car? My Ducati 916 didn't like to cruise with the cams and chip I had in it. It liked either full throttle or idle. I'm thinking an ITB setup would be similar.
4) How much whp could I put out without swapping in custom cams or high comp pistons?
This might be a direction I don't want to go towards, but I'm just curious. I'm not expecting a lot of feedback on this, cause not a lot of people run a setup like this.
I found this setup:
http://www.jenvey.co.uk/home/standar...45-kit-ckmmz01
When I emailed them, they told me they have a distributor in Florida, and they only have a kit currently for an NB.
I also found a few videos:
There are questions I still have no answers for about a setup like this.
1) How would I tune with with my MS if the intake runners are so short? I mean, how do I get a proper vacuum signal?
I asked that question to Jenvey, and they said that I would need to tune by throttle position and crank position. What???
2) What kind of fuel mileage could I expect with ITB's? I got 26mpg stock, I get about 29mpg turbo'd.
3) How do ITB's behave on a daily driven car? My Ducati 916 didn't like to cruise with the cams and chip I had in it. It liked either full throttle or idle. I'm thinking an ITB setup would be similar.
4) How much whp could I put out without swapping in custom cams or high comp pistons?
This might be a direction I don't want to go towards, but I'm just curious. I'm not expecting a lot of feedback on this, cause not a lot of people run a setup like this.
I found this setup:
http://www.jenvey.co.uk/home/standar...45-kit-ckmmz01
When I emailed them, they told me they have a distributor in Florida, and they only have a kit currently for an NB.
I also found a few videos:
#3
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I'd love my engine bay to look like this.
I also believe that 14's on a naturally aspirated ITB setup on my car would gain more respect than my car would on a turbo setup running 13's. I mean think about it. If you have a LS-1 camaro and you get beat by a turbo Miata...you'll be like, "that thing weighs 1/2 my car, and I don't have boost...let me boost my car, then we'll see who wins". However, if you beat me, but I still can hang with you, you might say, "that thing is pretty fast, but I didn't hear it blow off. What? It's Not Boosted??? That's pretty mean!"
ITB's change the whole power band. I have read that it's full throttle power from 3000-9000 RPM.
I also believe that 14's on a naturally aspirated ITB setup on my car would gain more respect than my car would on a turbo setup running 13's. I mean think about it. If you have a LS-1 camaro and you get beat by a turbo Miata...you'll be like, "that thing weighs 1/2 my car, and I don't have boost...let me boost my car, then we'll see who wins". However, if you beat me, but I still can hang with you, you might say, "that thing is pretty fast, but I didn't hear it blow off. What? It's Not Boosted??? That's pretty mean!"
ITB's change the whole power band. I have read that it's full throttle power from 3000-9000 RPM.
#5
just throwing out numbers here:
If you have a stock TB thats 60mm, that 60mm hole is feeding 4 cylinders. Your TB is your bottle neck. not to mention having to spread that air across 4 cylinders.
If you have ITBs that are 40mm, thats 160mm feeding the engine divided by 4. so technically you have the ability to feed more air into the engine and with short straight runners you get that supply faster.
EDIT: Not to mention that since you wont be running boost that gives you alot of room to punch those cylinders out and get some nice high comp pistons.
If you have a stock TB thats 60mm, that 60mm hole is feeding 4 cylinders. Your TB is your bottle neck. not to mention having to spread that air across 4 cylinders.
If you have ITBs that are 40mm, thats 160mm feeding the engine divided by 4. so technically you have the ability to feed more air into the engine and with short straight runners you get that supply faster.
EDIT: Not to mention that since you wont be running boost that gives you alot of room to punch those cylinders out and get some nice high comp pistons.
#9
I honestly don't see the appeal. You will make ZERO torque, which is what I enjoy the most with a turbo. However, different strokes.
Good luck, just remember that it takes a lot of money to get where the Fuji car is and the 949 crew is not far behind either.
You won't be "hangin" with any slightly fast cars either.
Good luck, just remember that it takes a lot of money to get where the Fuji car is and the 949 crew is not far behind either.
You won't be "hangin" with any slightly fast cars either.
#13
Thing is, on horsepower freak builds people tend to swap to a bigger TB to get rid of the bottle neck. Same principle as removing the cat to get better flowing exhaust.
The more air and fuel you can get in and exhaust out, the more eficient your setup will be and make some kind of power!
#18
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I am satisfied with my turbo, but I'm like the rest of the community, I always have to be messing around with different setups. I wouldn't even matter if I did an LSX swap...I'd still find something else I'd want to direct my attention towards.