Technical > Spud Miller's Cave

Hilborn Help Needed

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dusterdave173:
Thanks so much!!
Part of my problems was just "not knowing"
I have raced for 30 years and had a lifetime of engines and cars I have built but this deal is all new to me--I am just so glad the car acts right and seems AOK and my little engine has run great and taken some abuse from all this "tuning" and is a strong little unit--I LOVE the throttle response--feel like I will always have a Hilborn from now on.
I just got a little spun out last week--again--Thanks for the great tips!

dreracecar:
If you really want to get anal about it Kinsler sells a shaft spliter that takes your 2 throttle shafts and splits them into 4 so you now can compensate for shaft twist. 99.9 % of the time with what/how we do things, its not really needed, but I will confess that I did set up my injection so that the blades went oppisite directions so the air would flow over the blades  to the same spot in each of the ports. This was only theory for I did no dyno/track testing to measure any difference. It just sounded like a good idea at the time.

Spud Miller:

--- Quote from: dreracecar on August 27, 2014, 09:39:08 AM ---If you really want to get anal about it Kinsler sells a shaft spliter that takes your 2 throttle shafts and splits them into 4 so you now can compensate for shaft twist. 99.9 % of the time with what/how we do things, its not really needed, but I will confess that I did set up my injection so that the blades went oppisite directions so the air would flow over the blades  to the same spot in each of the ports. This was only theory for I did no dyno/track testing to measure any difference. It just sounded like a good idea at the time.

--- End quote ---

 Sprint car racers all get set up that way (opening opposite) because they spend more time at partial throttle coming off corners and such. It does make a difference in that case but I doubt it is huge. As you know, to do it requires an over/under arm situation somewhere or a bell crank and those aren't very much fun sometimes.

 Spud

dreracecar:
Over-under was not a problem since I have the ability to make my own parts. You should have seen the complex system I did in recreating IVO's "SHOWBOAT" hooking up 4 engines. Granted this is a showpiece that does not run but I did get 8 injector bodies and 32 throttle blades working smoothly

BK:
Another thing to watch. Have your return spring at the same location as your cable or linkage. That way it cant twist the shaft.

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