Holley sniper as a replacement for type4 dual carbs or stock EFI

[xoo00oox]

[panel]

Here's some info for us to refer to in case it gets lost.

https://www.thesamba.com/vw/forum/viewtopic.php?t=...mp;start=0
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My '65-Subaru EJ20 Turbo conversion

[jlrftype7]

I will be curious to hear how it does with the long runners for good fuel mixture all the way out to the cyls.
Will be interesting.
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'68 Westy- my first VW and vehicle/Bus- long gone.- sold it to a traveling Swiss couple....
'67 Type 3 Fastback, my 2nd car- gone
'69 Semi-Auto Stick Shift Beetle-gone
2017 MINI Coopers, our current DDs
‘84 Tin Top - Hilga....Auto

[skills@eurocarsplus]

don't know why it got moved....but

https://www.thesamba.com/vw/forum/viewtopic.php?p=9712307#9712307

and of course i went and stirred the shit again
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[cmonSTART]

So, obviously I've never done the mod but I'm pretty skeptical about basically mounting a TBI system on a type 4 engine because of the long, cold intake runners. They work OK on V8's but I have to think it would be a lot like a center carb.

I hope I'm wrong and would love to see how it turns out! Best of luck with it!
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'78 Bus 2.0FI
de K1IGS

[danfromsyr]

I've run a center progressive on long runners on my Baja bug for YEeeeeaaars.

it runs fine, it idles fine it's never iced up, though admittedly I don't drive it in the snow and cold. well.. around the yard but that doesn't count.

you can see it peeking out here..


in general it will be better than the OEM 72-74 dual carbs.. well than nearing 50yr old carbs.. even if rebuilt.

proper oem this and that.. blahh blahh blahh.

in 'general' IT WILL BE FINE with a single center mount carb.

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[Wildthings]

[cmonSTART]

Glad you got yours dialed. Many carbed vehicles/machines with long intake runners have inherent problems that need to be overcome. (Condensation, ice, distribution..) I'm curious to see how the mod works out!

Love the Baja bug in the snow! That's great!
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'78 Bus 2.0FI
de K1IGS

[SGKent]

[metahacker]

You should talk to Lowbugget.

The Holley is a nice system. It has a lot of fans. All air cooled engines can benefit greatly from a wideband closed-loop EFI system that's properly tuned.

It would pair nicely with a 123 Bluetooth distributor.

That said, your challenge with this system will be the same as with any set up on a Type 4 that introduces fuel at a central point. There's a reason they fitted dual carbs and Jetronic with the injectors where they are. It's problematic otherwise.

Honestly, finding a solution that re-used the factory manifolds and air plenum... retaining the injector positions... and then running a throttle body with it's own TPS and IAT sensors... would be better. You can just run a MAP off a vacuum line...or a MAF if you're into that sort of thing, but that will just add more complexity. There is an Ahnendorp EFI system that machines the stock throttle body to add a TPS (and perhaps more)... then takes over control of the injectors with a new ECU (that I believe introduces a MAP sensor in the ECU case, as well)... but IMO it's "too" expensive. But it does look almost 100% stock and can support most reasonable custom engine configurations.

I would hate to steer you towards Megasquirt when you're looking at a simple highly "packaged" system like the Holley Sniper... (MS is amazing, however...)

I have also thought about this same conversion you are working through....

I'd like to find something appropriate and simple, as well.

They have dual 4bbl Sniper EFI kits ... wonder if there would be a way to run dual Sniper 1bbls .. that would be cool on a VW. Like EFI Holley Kadron esque.

[raygreenwood]

So.....control wise.....the Holly Sniper TB "seems" to have it all in one sock right?

I mean....map, fuel pressure, throttle position etc.....all in the TB. Those can exist there with few problems on a center mounted TB.

So......why not just just mount the HS throttle body on a central plenum adapter like others use with center mounted carbs.....using the stock runners. Then.... disconect the injector that the Sniper TB has......and run the input to a batch fire set of iniectors in the original ports?

Between the wideband in the exhaust and the tweak ability of the aystem you should be wblr to balance the AFR.

Do we think the system or the TB actually knows where the inkector(s) are mounted?

I would think that the inkector(s) mounted in the TB have enougj volume to feed four cylinders.....do we think the system cares whether it gets that fuel volume from one big one or four small ones?

There may be a series reaistance issue or not.

Ray

[Clatter]

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[SGKent]

I'll bet Holley would play ball with this unit is it works as a center unit and someone presented a what-if to them. The worst case scenario would be to add an additional circuit that is triggered by the current injector pulse. I would wager that there are enough buses that would install it to make it a viable option. If CARB has already approved it for California then it is also possible one might even be able to use it on buses here in lieu of L-jet. I have nothing against L-jet, just see this as a possible option to folks that are tired of dealing with progressive problems.
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“Most people don’t know what they’re doing, and a lot of them are really good at it.” - George Carlin

[Erik G]

https://www.thesamba.com/vw/forum/viewtopic.php?t=751894

[xoo00oox]

I ordered and paid for this thing in the middle of July, after not hearing from them I emailed them and was told it would be in August. That date passes and no word from them I emailed them again, now it will be October 15, then October 18. I have not heard anything from them so I emailed them yesterday and just now am getting this reply....


Hello,



We apologize for the shipping delay. As of today, the next estimated shipping date is 12/24/21.


They had no problem taking my money back in July and they make no effort to update me on things rather they just wait for me to contact them when it does not show up.

[metahacker]

perhaps you should consider the GM Rochester 2GC Holley ... it's available to ship immediately .. may perform better ..

https://www.ebay.com/sch/i.html?_from=R40&_trk...;_osacat=0

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[metahacker]

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