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Best Injection for 305 Sprint Car

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Best Injection for 305 Sprint Car

Postby fastvette » Fri Oct 29, 2010 1:09 pm

What would be the best mechanical injection set up to use on a 305 Sprint car engine? I have not been around this type of racing so I don't know what is being used or works the best. Does any one use a carb?

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Re: Best Injection for 305 Sprint Car

Postby KRYPTINITE RACE ENGINES » Fri Oct 29, 2010 4:17 pm

Is this a Race Safe deal? or open 305 class
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Re: Best Injection for 305 Sprint Car

Postby fastvette » Fri Oct 29, 2010 5:01 pm

Yes it is the Racesaver class.
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Re: Best Injection for 305 Sprint Car

Postby mbmotorspt » Fri Oct 29, 2010 7:28 pm

Engler. Look on Hoseheads classifieds, http://www.englermachine.com or call Tim Engler at 812-386-3254
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Re: Best Injection for 305 Sprint Car

Postby ProPower engines » Fri Oct 29, 2010 7:45 pm

A smaller size like 2 3/16" is real common for small displacement class's.There is a crap load of Hilborne stuff available and easy to setup.Best thing is cheap too.Depending on what head you can use and intake gasket you are limited to the hilborne stuff is the way to go
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Re: Best Injection for 305 Sprint Car

Postby fastvette » Fri Oct 29, 2010 10:04 pm

You have to use the Racesaver head that is a 23 degree std port Brodix made just for the 305. You can not modify it at all. How would a Ron's toilet bowl work compared to the Hilborn style?

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Re: Best Injection for 305 Sprint Car

Postby ProPower engines » Sat Oct 30, 2010 12:48 am

I would think the Hilborne would be better with individual runners all the same as apposed to a plenum. Tuning stack length is easier then filling the plenum. I have never used a toilet set up so I have no accurate details to compare to. But most sprint cars use this style of injection. I have seen the other type used in more unlimited class's like the oswego style super mods and the outlaw offset super's as well but they had simple engine rules like " only 1 engine allowed" run what ya brung.
Enough time and money will almost make any set up work.
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Re: Best Injection for 305 Sprint Car

Postby Dave Koehler » Sat Oct 30, 2010 12:34 pm

I think the single 4 barrel deal would be problematic with the manifold being the cork. Stacks are most common on sprint cars partially due to heritage. I just read the rules looking for "stack only". There isn't so there is no reason that a tunnel ram/hat system couldn't be used. Add a tractor puller type air cleaner to it and rock on.
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Re: Best Injection for 305 Sprint Car

Postby BlitzA64 » Sun Oct 31, 2010 8:40 am

I built a V/4 Chevy some years ago using 1/2 an Edelbrock Victor Ram with a Toilet. We cut the throttle plate size down to 2.75" and it ran like a champ. We tried 2.25" Hilborn stacks on it with no gain, in fact the Toilet set up was better up top and was much simpler to deal with.
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Re: Best Injection for 305 Sprint Car

Postby nitro27 » Mon Nov 01, 2010 1:11 pm

we have 5 racesaver 305s with hilborn 2 3/16 units work great
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Re: Best Injection for 305 Sprint Car

Postby fastvette » Mon Nov 01, 2010 4:41 pm

nitro27 wrote:we have 5 racesaver 305s with hilborn 2 3/16 units work great


What size tracks do you run on?

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Re: Best Injection for 305 Sprint Car

Postby nitro27 » Tue Nov 02, 2010 6:30 am

CRSA tour runs on tight 1/4 to fast 1/2s . all about getting fuel system right . we had ours done by waterman we have run very good with the 360s when tracks slick up.
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