Best Injection for 305 Sprint Car

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fastvette
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Best Injection for 305 Sprint Car

Post by fastvette »

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

Post by KRYPTINITE RACE ENGINES »

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

Post by fastvette »

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

Post by mbmotorspt »

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

Post by ProPower engines »

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

Post by fastvette »

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

Post by ProPower engines »

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.
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Re: Best Injection for 305 Sprint Car

Post by Dave Koehler »

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

Post by BlitzA64 »

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

Post by nitro27 »

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

Post by fastvette »

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

Post by nitro27 »

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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