ITBs on turbo engine?
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ITBs on turbo engine?
I was reading https://honda-tech.com/zerothread?id=696998 and was wondering if ITBs would benefit a turbocharged car? (seriously now...)
Wouldn't you need some fat piping to flow enough air? Too delicate to tune? OR no real power gains and just a waste?
Wouldn't you need some fat piping to flow enough air? Too delicate to tune? OR no real power gains and just a waste?
Honda-Tech Member
Joined: Mar 2002
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From: Charleston, SC
Re: ITBs on turbo engine? (dap)
The ITB would be the same as on a NA car but the plenum would be connected on the ends of the runners. The IC pipe will then connect straight to the plenum.
Tuning is a real bitch with these.
Tuning is a real bitch with these.
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From: 951 to the 949 so,cal bishes
Re: ITBs on turbo engine? (GudeH23a)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by GudeH23a »</TD></TR><TR><TD CLASS="quote">The ITB would be the same as on a NA car but the plenum would be connected on the ends of the runners. The IC pipe will then connect straight to the plenum.
Tuning is a real bitch with these.</TD></TR></TABLE>
Not a great pic but you get the idea..
Tuning is a real bitch with these.</TD></TR></TABLE>
Not a great pic but you get the idea..
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Joined: Aug 2001
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From: AZ
Re: ITBs on turbo engine? (dap)
some big turbo high hp RB26DETTs have a single tb. they removed the ITBS because at that power level, they become a restriction. the tb plates are 3 mm thick x 6 = 18 mm of restriction vs just 3 with the singe TB manifold.
Joined: Jan 2004
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From: DFW
Re: ITBs on turbo engine? (RR98DX)
Sure they did and a single TB will become a restriction at a certain point as well thats why people go with larger single TBs the size factor is irellevant if you chose the correct size ITB to support your intended HP level from the get go.
The big thing to ask is how do they drive? If its anything like going from a single carb to a dual carb setup its a night and day difference. This will be a subjective opinion however so take it with a grain of salt. I went from a single carb to a dual carb setup with a .500 inch( about 13mm) lift cam and around 280-300 duration at .050 and it was like a night and day difference. Now if you could get a similar response from a ITB engine then I would do it all day long. Every engine and setup will be diff. The single TB may very well pull on the ITB setup on the top end or at just plain WOT. But the overall driveability may be better on the ITB setup.
If you have to go over to TWM and spend $2k to get a setup from them you will prolly not get a very good bang for you buck. If however you can fab your own mani and buy a set of ITBs and linkage seperate you may come in under say $600-700 depending on how good of prices you can get. This wouldnt be bad IMO> Last pair of ITBs I bought from AEM back in like 95 or so and they were about $250 each I think. You will need 2 total. The linkage you can buy a nice center pull from http://www.racetep.com for about $30.
The big thing to ask is how do they drive? If its anything like going from a single carb to a dual carb setup its a night and day difference. This will be a subjective opinion however so take it with a grain of salt. I went from a single carb to a dual carb setup with a .500 inch( about 13mm) lift cam and around 280-300 duration at .050 and it was like a night and day difference. Now if you could get a similar response from a ITB engine then I would do it all day long. Every engine and setup will be diff. The single TB may very well pull on the ITB setup on the top end or at just plain WOT. But the overall driveability may be better on the ITB setup.
If you have to go over to TWM and spend $2k to get a setup from them you will prolly not get a very good bang for you buck. If however you can fab your own mani and buy a set of ITBs and linkage seperate you may come in under say $600-700 depending on how good of prices you can get. This wouldnt be bad IMO> Last pair of ITBs I bought from AEM back in like 95 or so and they were about $250 each I think. You will need 2 total. The linkage you can buy a nice center pull from http://www.racetep.com for about $30.
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From: Long Island, NY, USA
yeah the sr20det from the pulsar GTi-R uses this set up, only one question to ask, is it really worth it, people have made up to 700hp with one throttle bodie. but if money is no option and u do it and tune it right, im sure u can make tremendous amount of power
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From: HOT HOT Phoenix Ouch its HOT
Re: (Dee)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Dee »</TD></TR><TR><TD CLASS="quote">FYI... most of the high horsepower GTR's (1000+whp) change to single (90mm~100mm)TB's.
Nissan GTR and GTiR(SR20DET) have ITB's from the factory. </TD></TR></TABLE>
Again area under the curve, but why do it with ITB's when you could do it better with a better combination aimed at that area.
Nissan GTR and GTiR(SR20DET) have ITB's from the factory. </TD></TR></TABLE>
Again area under the curve, but why do it with ITB's when you could do it better with a better combination aimed at that area.
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From: Japan Dammit Japan
Re: (nd_styles)
ITB's in the Japanese state of mind are the ultimate "race" setup. The stock ITB's on the GTRs actually cause a lot of turbulence on the 10k rpm 1500whp GTR's. The single Godzilla sized TB setups have proven to flatten out the peaky power curves caused by stock ITB's. Infinity Q45 90mm TB is the choice of many single TB GTR owners.
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