Anybody using DTA ECU
#16
Nordschleife Master
ITBs would be fit near the cylinder head with some type of common airbox for each side. I have done work with a variety of ITBs on turbocharged 911s. It takes a lot of time to properly tune and you need to have a system that has a secondary fuel table. The ITBs need to be mapped with TPS as the load and a second table for manifold pressure. Or you can use a MoTeC ECU which has 4 dimensional mapping. The 3006 ITBs from TWM induction have been a source of problems and they are high butterfly which I've found not to work well in a turbocharged environment. If you want to use ITBs there are other alternatives that are better. My opinion is that unless you are racing the car, your most easy solution is a 3.2 or 964 aluminum or plastic manifold.
#17
Mitch,
Come on down any time. I'm using a Carrera manifold and a 70 mm Edelbrock throttle body. Injectors are Siemens/Deka/Mototron high impedence 60 lb/hr (630 cc) injectors, running at about 3.2 bar. There's been lots of discussion on this board and others about ITBs on turbo engines; I would agree with Geoffrey that (from what I've heard) they're more trouble than they're worth for turbocharged applications.
Rob
Come on down any time. I'm using a Carrera manifold and a 70 mm Edelbrock throttle body. Injectors are Siemens/Deka/Mototron high impedence 60 lb/hr (630 cc) injectors, running at about 3.2 bar. There's been lots of discussion on this board and others about ITBs on turbo engines; I would agree with Geoffrey that (from what I've heard) they're more trouble than they're worth for turbocharged applications.
Rob
#18
Formula One Spin Doctor
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Originally Posted by Rob S
Mitch,
Come on down any time. I'm using a Carrera manifold and a 70 mm Edelbrock throttle body. Injectors are Siemens/Deka/Mototron high impedence 60 lb/hr (630 cc) injectors, running at about 3.2 bar. There's been lots of discussion on this board and others about ITBs on turbo engines; I would agree with Geoffrey that (from what I've heard) they're more trouble than they're worth for turbocharged applications.
Rob
Come on down any time. I'm using a Carrera manifold and a 70 mm Edelbrock throttle body. Injectors are Siemens/Deka/Mototron high impedence 60 lb/hr (630 cc) injectors, running at about 3.2 bar. There's been lots of discussion on this board and others about ITBs on turbo engines; I would agree with Geoffrey that (from what I've heard) they're more trouble than they're worth for turbocharged applications.
Rob
#19
Nordschleife Master
Rob, Please don't misuderstand my comments, I never said that they were more trouble than they are worth.
Contrary to what Wayne says, the ITBs to make more power than a single throttle body/common plenum setup with noticably better throttle response.
Contrary to what Wayne says, the ITBs to make more power than a single throttle body/common plenum setup with noticably better throttle response.
Last edited by Geoffrey; 11-07-2006 at 02:01 PM.
#20
Geoffrey,
I didn't mean to mischaracterize your opinion. What you said above is "If you want to use ITBs there are other alternatives that are better." Which I agree with. I'll go one step further to say, in *my* opinion, they're more trouble than they're worth...
Rob
I didn't mean to mischaracterize your opinion. What you said above is "If you want to use ITBs there are other alternatives that are better." Which I agree with. I'll go one step further to say, in *my* opinion, they're more trouble than they're worth...
Rob
#21
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I have used the DTA with great success. For my own 930 EFI conversion I'm still undecided on which system to use. The 3.2L Motronic (I reprogram it for semi-sequential, MAF & Wasted Spark) or the DTA system. I'm a Motronic guy (I convert it to work same as a stand alone), however I do like the DTA.
#22
Formula One Spin Doctor
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Geoffrey,
I did say the ITB's have better throttle respone , but dis-agree that they make more power. you will see better torque curves with the ITB , but for all out power they are no match to a plenum type system with single or dual TB.
This i have seen to be consistent regardless of engine size or type. Now if a TB system flows better than a particlular single /plenum TB system , that might be so , but it is more a design problem or too small a TB than the topology..
I did say the ITB's have better throttle respone , but dis-agree that they make more power. you will see better torque curves with the ITB , but for all out power they are no match to a plenum type system with single or dual TB.
This i have seen to be consistent regardless of engine size or type. Now if a TB system flows better than a particlular single /plenum TB system , that might be so , but it is more a design problem or too small a TB than the topology..
#23
Nordschleife Master
"Now if a TB system flows better than a particlular single /plenum TB system , that might be so , but it is more a design problem or too small a TB than the topology.."
Would you consider the 3.2 Carrera intake and throttle body to fit in that category?
Would you consider the 3.2 Carrera intake and throttle body to fit in that category?
#24
Formula One Spin Doctor
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Originally Posted by Geoffrey
"Now if a TB system flows better than a particlular single /plenum TB system , that might be so , but it is more a design problem or too small a TB than the topology.."
Would you consider the 3.2 Carrera intake and throttle body to fit in that category?
Would you consider the 3.2 Carrera intake and throttle body to fit in that category?
Also ITB's are selected and sized for length /bore size etc based on what is needed /application , bore and stroke , peak rpm etc. as distance from the intake port will also be based on this ..
#25
Nordschleife Master
I think that is the issue, I've never seen an ITB setup produce less HP or Torque than a 3.2 Carrera or 964 system, particularly at the lower RPMs as you mentioned, but also at the higher RPMs.
#26
Formula One Spin Doctor
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I was commenting on the topology Geoffrey, not a specific a/b/ model.
an ITB system is a custom system , compare it to a custom plenum TB System and the differences will be pronounced..
A ITB system over a stock 3.2 is as you say there is no comparision.
an ITB system is a custom system , compare it to a custom plenum TB System and the differences will be pronounced..
A ITB system over a stock 3.2 is as you say there is no comparision.
#29
There are other dealers too, including Dave Capurro, at C&C Automotive in Reno, who I bought mine from and who did my tuning. I suggest you buy from whoever you plan to have do the tuning.
#30
Formula One Spin Doctor
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Originally Posted by Geoffrey
A.Wayne
Marco Manzie @ billett design.com is a dealer and i see that vitesse has also .
i have dealt with billet design in the past..