ITB's for racingbeat manifolds
ITB's for racingbeat manifolds
So i have been looking for a easy and affordable tb to mount on a RB manifold.
And i just found this:
48mm Universal ITB Throttle body D shaft : RHD Engineering
How much power can 48mm support on an NA ?
And i just found this:
48mm Universal ITB Throttle body D shaft : RHD Engineering
How much power can 48mm support on an NA ?
Senior Member
Joined: Feb 2003
Posts: 331
Likes: 0
From: SoCal
TWM/Borla Throttle Bodies are nice
Here are some really nice throttle bodies that bolt up to the Racing Beat manifolds, but they are not cheap. Nice quality products.
Here is the link.
3002 Series
Here is the link.
3002 Series
Those are IDA style, the borla induction for DCOE (side draft) is 2900 series.
I like the idea of australian one better because I do not need staged injection with modern injectors/simple fuel only standalone EMS.
I like the idea of australian one better because I do not need staged injection with modern injectors/simple fuel only standalone EMS.
Joined: Sep 2004
Posts: 3,258
Likes: 9
From: South Florida
Throttle Bodies, EFI Fuel Pumps, EFI Regulators, Wolf 3D Engine Management Systems, EFI Hardware
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Senior Member
Joined: Apr 2004
Posts: 453
Likes: 0
From: South Jordan UT
It may be a little on the ghetto side of things, but I was going to initially mod my Weber 50 DCO/SP to accept a TPS and use it as an EFI TB, and then as per my normal methods I started to look at other vehicles for parts that could be adapted. Long story short, I found a decent throttle setup on my dads 1991 for E-250 w/ a 5.0 (same style as the 5.8 and 7.5L) The 89-97 Ford truck V8's had a 50mm dual runner throttlebody, with an IAC plumbed directly on the unit, and when comparing the flanges of the DCO and Ford TB, the Fords spread of the bore in only slightly narrower than the DCO and the mounting bolt patterns dont interfere with eachother. Looks to me like with minimal work and a small adapter plate, the Ford TB's could be a good/cheap EFI ready solution to those who have limited cash flow. Ive seen them go for ~$50 on ebay with both the IAC motor and TPS, and for those who want a little bigger, BBK makes aftermarket 56mm and 61mm units as well
It may be a little on the ghetto side of things, but I was going to initially mod my Weber 50 DCO/SP to accept a TPS and use it as an EFI TB, and then as per my normal methods I started to look at other vehicles for parts that could be adapted. Long story short, I found a decent throttle setup on my dads 1991 for E-250 w/ a 5.0 (same style as the 5.8 and 7.5L) The 89-97 Ford truck V8's had a 50mm dual runner throttlebody, with an IAC plumbed directly on the unit, and when comparing the flanges of the DCO and Ford TB, the Fords spread of the bore in only slightly narrower than the DCO and the mounting bolt patterns dont interfere with each other. Looks to me like with minimal work and a small adapter plate, the Ford TB's could be a good/cheap EFI ready solution to those who have limited cash flow. Ive seen them go for ~$50 on ebay with both the IAC motor and TPS, and for those who want a little bigger, BBK makes aftermarket 56mm and 61mm units as well
as for your findings with the Ford throttles, that's a great find! please take some photos if you get a chance.
that is GREAT stuff Sgt. Stinkfist! truly a good find for those of us that go for this sort of thing. i'd like to nominate you for office. how does Senator Stinkfist sound? hmmm ... yes. yes, i like it. 
this thread is interesting cause i'm also building my setup using a mustang dual 54mm throttle body. i haven't welded it together yet but i will put up pics as soon as its done
Nice TB's for the 20b that thing is going to be sick. i have been looking for a well priced set for my bridged 13b. although the 48mm option is cheaper i dont thing 48mm of airflow could support a 6 port half bridge. correct me if iam wrong.
Joined: Mar 2001
Posts: 31,837
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From: https://www2.mazda.com/en/100th/
they ran 48mm carbs on the P port engines in the 80's… and 48mm EFI in the 90's, it should be fine.
I read on the same page that sells the tb i linked to, that tb's need to be bigger the further away from the ports they are, if that is true then it should explain why it works with dual 48mm on a ported engine while the stock intake doesn't deliver enough with it's 3*45mm tb.
Mostly because the factory manifolds, in comparison, have extremely long runners vs a weber doc manifold, and even more so than an IDA or a lake city style manifold. I've actually tossed around the idea of using a stock FC. or FD throttle body and fabing up a short runner virticle mount manifold like an IDA so as to keep the primary and secondary ports/runners independent from each other (could be helpful in allowing interesting port combinations and retain better deliverability manners and a progressive throttle setup)