New (to me) 7.90 Rhino question

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New (to me) 7.90 Rhino question

Postby csracing » Wed Aug 08, 2018 10:58 am

I've got a 3.5x3 Rhino engine due tomorrow. Has a 42mm carb on it. Couple questions for you guys as this is the first time I'll be running this carb.

1) Jets the same as a 33?
2) Will a throttle cable from a 33 work in the 42 or do I need a new cable?
3) We have a 2008 Bos car with no weight and a 85# driver. I expect I'll need to add weight. I have a behind the seat weight tank. Not sure how much it will hold, but any ideas on roughly where I should start?
4) Any tips and tricks to tuning the carb that you'd like to share would be appreciated.

Thanks
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Re: New (to me) 7.90 Rhino question

Postby WILD BILL » Wed Aug 08, 2018 7:19 pm

Cable will fit providing it's long enough to reach the new carb.

As for jets, I would skip the mikuni jets and get the adapter for the Holley jets and use there Max jets.

Kinda hard to say where to start weight wise without knowing what this motor is replacing.
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Re: New (to me) 7.90 Rhino question

Postby csracing » Wed Aug 08, 2018 10:34 pm

Current engine runs 8.90ish with no weight. It's Animal-based (LO206) so probably not a lot of help to you there.
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Re: New (to me) 7.90 Rhino question

Postby vance61 » Mon Sep 10, 2018 8:33 pm

Run .59 pilot 90 holly or 102 max jet will get you close.
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Re: New (to me) 7.90 Rhino question

Postby blossomracing » Wed Oct 17, 2018 10:05 am

about 430 to 450 lbs to run 7.90 with 3.5 x 3 with 42mm carb. watch head temps, 150 to 160 at the starting line and about 100 to 130 head temp rise at finish line. Make sure to get you idle circuit set up first then work on top end circuit if you need to do any adjustments.
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