OBX ITB and Jenvey Kit comparison
I bought an OBX ITB kit awhile back just to see how they compare to the Jenvey kit I currently have. The OBX kit comes with a TPS, throttle bodies with linkages assembled, and a vacuum block attached. Out of the box, the first thing I noticed is that the OBX kit is quite heavy, much heavier than the Jenvey kit. The springs on the throttle bodies on the obx kit has more tension, while the Jenvey kit, the throttle linkage spins smoother. The obx setup utilizes bigger throttle bodies at least 2-3mm bigger than the jenvey kit. The casting inside the flange of the obx kit has some imperfections, but that can be smoothed out easily. My Jenvey OEM TPS adapter did not fit on the OBX unit. The thread on the water elbow is not the right size for the Engine Coolant Temperature sensor. I had to drill it out and retap it to a 12mm X 1.50. Overall isn't too bad of a unit, there is some work to be done like the Jenvey kit, the price is certainly attractive and it is nice how everything comes fully assembled. I am curious if the bigger throttle body bore will increase performance.
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Good thread idea :thumbup;
In for more :D |
The Jenvey S2000 kit uses the SF51 tapered throttle body which has a 51mm Inlet w/ 4.5 deg taper over 66mm body length. If my math is correct, that is a 10.4mm reduction in diameter, making the Outlet diameter of the throttle body 40.6mm.The OBX unit states it uses a 50mm throttle body. Based on your comments, I wouldn't be surprised if it is a straight bore body. Are you willing to verify this will calipers?
Can you elaborate on where you believe the extra weight is coming from? Additional use of steel parts? Do the OBX throttle bodies have individual idle bleed screws or a single one for all four throttle bodies? Does the TPS bolt pattern match up to the Colvern/Wabash unit despite not fitting the Jenvey OEM TPS adapter? I believe I read in another thread that you considered buying these for the Hayward-style manifold with the angled water neck and bleeder valve. Are you using the manifold with your Jenevy TB's? If you had to do it again, would you purchase the OBX unit instead of the Jenveys? |
Originally Posted by RStoR
(Post 20728789)
The Jenvey S2000 kit uses the SF51 tapered throttle body which has a 51mm Inlet w/ 4.5 deg taper over 66mm body length. If my math is correct, that is a 10.4mm reduction in diameter, making the Outlet diameter of the throttle body 40.6mm.The OBX unit states it uses a 50mm throttle body. Based on your comments, I wouldn't be surprised if it is a straight bore body. Are you willing to verify this will calipers?
Originally Posted by RStoR
(Post 20728789)
Can you elaborate on where you believe the extra weight is coming from? Additional use of steel parts?
Originally Posted by RStoR
(Post 20728789)
Do the OBX throttle bodies have individual idle bleed screws or a single one for all four throttle bodies?
Originally Posted by RStoR
(Post 20728789)
Does the TPS bolt pattern match up to the Colvern/Wabash unit despite not fitting the Jenvey OEM TPS adapter?
Originally Posted by RStoR
(Post 20728789)
I believe I read in another thread that you considered buying these for the Hayward-style manifold with the angled water neck and bleeder valve. Are you using the manifold with your Jenevy TB's?
Originally Posted by RStoR
(Post 20728789)
If you had to do it again, would you purchase the OBX unit instead of the Jenveys?
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Originally Posted by freezingcoffee
(Post 20729065)
If I had another chance, I would of just bought the Toda units. Keep in mind, Toda units are bored 4age throttle bodies with their flange, but they provide everything to just bolt-on.
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Toda also offers their own pre-fabed plenum/manifold that easily attaches to their ITB kit. I would see this expandability as a plus.
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Originally Posted by jbkonis
(Post 20729711)
Toda also offers their own pre-fabed plenum/manifold that easily attaches to their ITB kit. I would see this expandability as a plus.
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Originally Posted by freezingcoffee
(Post 20729065)
No I would not. The smoothness of the throttles, lightweight flange, and good support from jenvey is good enough for me. If I had another chance, I would of just bought the Toda units. Keep in mind, Toda units are bored 4age throttle bodies with their flange, but they provide everything to just bolt-on.
Some of the early Toda ITB's did use the 4age throttles ( B16 and other engines) but the F20C set I have are their own units. |
Are you sure the toda's are bored out 4ag throttles? I thought toda used the 4ag itb's for the b-series applications
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Originally Posted by jbkonis
(Post 20729711)
Toda also offers their own pre-fabed plenum/manifold that easily attaches to their ITB kit. I would see this expandability as a plus.
http://i43.photobucket.com/albums/e3...s/MMRacing.jpg http://i43.photobucket.com/albums/e3...Dimensions.jpg Hayward does offer an aluminum plenum but it must be customed fabbed. http://i43.photobucket.com/albums/e3.../ITBTurbo2.jpg Reverie is a UK carbon specialist that makes numerous ITB plenum configurations. I believe Emerald Performance carries or can acquire these. Since the backing plates are not pre-cut with holes, you could possibly use these on any vendor's ITB set-up. http://www.reverie.ltd.uk/product_de...code=R01SE0459 http://i43.photobucket.com/albums/e3...cs/jenvey9.jpg |
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