E85 blow through carburetor

E85 blow through carburetor DEFAULT

Watch CSU Build a 1,000-plus Horsepower Blow-Through Carb

It was not even 10 years ago that the concept of a 1,000 horsepower street car was a mind boggling proposition. Now, anything less than quadruple-digit power barely makes news. While EFI is more user friendly and certainly more accessible than ever before, there is no disputing the simplicity and functionality of a carburetor.

But, when that carburetor is going to be tasked to handle a blow-through application exceeding 1,300 horsepower well, that's what Kevin Van Noy at CSU carbs in Fontana has been specializing in for over 15 years. Big power and alternative fuels, such as E85 and methanol, require significantly higher fuel flow than your run-of-the-mill carb can handle and Van Noy has a few tricks to make them possible.

The base carburetor for this project is Holley's 950 CFM Ultra XP (PN 0-80805BKX) that will be treated to a performance makeover by CSU. A mechanical secondary carburetor is a requirement for any blow through build as you want to set the linkage to open at almost a 1:1 rate. Van Noy is mainly a one-man band working out of his garage in Fontana and his shop is surprisingly devoid of the special gadgetry one might've expected a carburetor magician to have. Drill bits in 1/64th increments along with a mill and a few jigs are the only tools Kevin needs to complete virtually any carburetor build.

The key to a proper blow through setup comes down to three aspects the power valve, the boosters, and a strong understanding of how to set everything up. The most important part of the build is Van Noy's unique power valve design, which he calls a, "Simple one-way valve." "The more pressure you put on them, the further they get pushed open and they are easily adjusted. The progressive power valve allows the fuel curve to better reference boost pressure. "For this build we will set the primaries at five psi of boost and the secondaries at seven."

The next area needing attention is the needle and seats. Van Noy says around 900 horsepower at the crank on E85, or about 1,200 horsepower on gasoline, is when the factory single needle and seat cannot flow enough fuel. His solution is to upgrade to dual needle and seat bowls. This configuration can flow twice as much fuel to the bowls and holds around 50 percent more fuel than the XP's already expanded bowl size. The jets can be removed from the access holes on the front for quick tuning changes. A pair of 50cc accelerator pumps provide adequate pump shots for boost, and are bolstered with thicker pump arms to keep from bending against pressure in the bowls.

What's the most common question Van Noy gets? "How do they drive on the street?" "I always respond with 'beautifully,'" he says. "It really comes down to calibrating everything right and having the proper jetting in the idle circuit. Between that and the transfer slot, that's most of your drivability."

Assembly First Starts at Disassembly

Source:

Carburetor Solutions Unlimited
909-851-6955
csucarbs.com

Sours: https://www.motortrend.com/how-to/watch-csu-build-1000-plus-horsepower-blow-carb/
E85 blow through carb tuning#2147082
09/03/1611:56 PM09/03/1611:56 PM
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Oakland, MI

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dizusterOfflineOP
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There is always debate on EFI vs blow thru going on. I think the EFI guys always want to boast about how great it is.

There is no doubt EFI has great tuning features that carbs can't compete with. Being able to change fuel curves with the touch of a button is a very nice feature.

But just because EFI works great, doesn't mean carbs can't work good either. I have spent much of the past 5 years trying to make more power. For the carb this required more jet as I turned the boost up. Literally one fuel line, 4 bowl screws, and 2 primary jets.

Easy as pie to dial in WOT. Whike the drivability has stayed good, I spent today trying to make it even better.

Literally it was one phone call to my carb guy. Eric at www.horsepowerinnovations.com. I've gone from 550hp to almost 800hp now, so I can't complain that the carb needed a little work.

He told me spot on what jet size to change, and made a simple change to open up the power valve circuit. Car runs and drives like a dream now.

Who needs EFI? Lol...

Literally will cold start on E85 and idle at 500rpm...gotta love that.

https://youtu.be/7JhcgP87FrA


Re: E85 blow through carb tuning [Re: dizuster] #2147199
09/04/1610:39 AM09/04/1610:39 AM
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nielsville, minn.

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quickd100Offline
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Hard to beat a carb,they are CHEAP and easy for us old guys to work with. As with anything there is a learning curve when you go with a turbo.Dave


Re: E85 blow through carb tuning [Re: dizuster] #2147221
09/04/1611:36 AM09/04/1611:36 AM
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Charlotte, North Carolina
sgcudaOffline
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Anything is easy once you know how to work on it. EFI is great, until that old rule "Garbage in, garbage out" kicks in. If you don't understand 3D fuel maps, or fat finger the keyboard on a fuel curve adjustment, you could be in for a really bad day. Carbs don't have issues with viruses, or laptop batteries going dead, either. On the other hand, you don't stink like gasoline after changing the fuel curve on an EFI setup. My point is that both work really well. What are you comfortable with?



[image][/image]

Re: E85 blow through carb tuning [Re: dizuster] #2147322
09/04/1602:45 PM09/04/1602:45 PM
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Dirty Dena, Maryland
dodge turboOffline
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Love carbs sooo easy but a pain tuning. Ive been blow thru for years now

That new FITECH for $1500 1200hp looks like a pretty nice piece and has to s of features



78 Adventurer 150small block turbo'd 360w/Borg S475....smoke'em

Re: E85 blow through carb tuning [Re: dizuster] #2147355
09/04/1603:33 PM09/04/1603:33 PM
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Milwaukee WI

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TRENDZOffline
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I gave up on blowthrough carbs along time ago, because I couldn't get the carb to work in the wide range of operation that I wanted.
I'd get it working great up to say 7psi, get everthing dialed perfect. Then, as always, I would want more. Turn up the boost to say 10, and get that right. Now the transition from "no boost" to 10 was getting ragged. Straighten that out. Go to 14psi. Now getting very difficult to get the transition correct, but love the power. Go to 20. Total nightmare with transition. I literally cant get it right, plus ignition controls at that time would not let me do what I felt needed to be done.
Enter EFI.... All issues eliminated.
I DO truly get where you are coming from. There is a huge sense of accomplishment with good carb tuning. You guys go the extra mile and really get neat stuff done. All part of the experience of the hobby.
There are many more resources now that can get a carb where it needs to be, through years of trial and error on other experience.
My question is, if you want to run 25 psi, but regulate boost for traction, are you able to maintain good a/f ratios across a wide range? I've been disconnected from carbs for so long I really have no idea. If that can be done, that's awesome. What are you guys doing for ignition? Ignition control is the key to longevity. I really don't see how you can push a lot of boost through something without load sensing ignition.
Cud-dos to those that get those confounded carbs to work!



"use it 'till it breaks, replace as needed"

Re: E85 blow through carb tuning [Re: dizuster] #2147362
09/04/1603:48 PM09/04/1603:48 PM
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michigan
turbo toadOffline
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upFor Eric at horsepower invitations he did my carb for my slant and out of the box it worked flawless it wasnt till i got over 15psi did i have to make any changes and one phone call to Eric and a jet change later and my lean spot went away.
Im using his metering blocks on my new carb should be a treat dailing it in.


Check out my build on Facebook Ttoad Hurley its updated regularly

Re: E85 blow through carb tuning [Re: dizuster] #2148770
09/06/1601:38 PM09/06/1601:38 PM
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Michigan

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KiddartOnline content
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I cant get video to work??



Thank you
Kiddart

Re: E85 blow through carb tuning [Re: dizuster] #2148779
09/06/1601:52 PM09/06/1601:52 PM
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Marion, South Carolina [><]
an8sec70cudaOffline
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One of the fastest street cars around these parts is a carbed blow through deal. Twin turbo SBF fox body, stock suspension, 275 radials, etc etc. Runs 4s in the 1/8. Dude doesn't have a trailer...he drives it 2 hours to some of these shootouts.
Granted he's the only one...the other fast guys are EFI and turbo.



CHIP
'70 hemicuda...8 sec street car
'69 road runner 440 w/ Indy SRs
'69 road runner 440-6, 4 speed...Dad's ride
'71 Demon 340 resto project
'06 GMC 2500HD LBZ Duramax...toy hauler
'16 Grand Caravan SXT...baby hauler

Re: E85 blow through carb tuning [Re: dizuster] #2149249
09/06/1611:29 PM09/06/1611:29 PM
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Oakland, MI

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dizusterOfflineOP
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Sorry didn't realize the video was private!

Should work now



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Sours: https://board.moparts.org/ubbthreads/ubbthreads.php/topics/2147082/e85-blow-through-carb-tuning.html
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Q-Series 750CFM Drag Race Blow-Thru Annular Booster E85

Ideally suited for bracket racers and weekend warriors alike, Q-Series carburetors are purpose-built for the dragstrip. To combat the g's experienced during hard launches, Q-Series carbs are equipped with notched floats and secondary jet extensions. The high-flow aluminum main body isn't just lightweight, but it also features recessed air bleed cavities for improved air flow. Die-cast venturi are machined to exacting tolerances for outstanding throttle response. Billet metering blocks ensure a uniform fuel curve, while throttle-bodies enhance durability. For those days when track conditions vary from one pass to the next, QFT's QuickLink system makes adjusting the secondaries easy on models equipped with mechanical secondaries. The Q-Series is our most comprehensive line of carburetors, with applications available for use with gasoline, methanol, and E85 fuels, forced induction, drag race, circle track, and comes in both vacuum and mechanical secondary models. •Lightweight aluminum main body •Vacuum and mechanical secondary models available •Aluminum fuel bowls with dual sight glass windows •Billet metering blocks with 4-corner idle system •Changeable idle feed and power valve channel restrictions •Billet aluminum throttle body provides exceptional precision and strength •PTFE coated and sealed shafts

About Quick Fuel

“Innovators in fuel systems” is more than just a by-line. Since 1998, Quick Fuel Technology has grown exponentially culminating in the benchmark by which performance carburetors are measured. At QFT, our product innovation is only matched by our customer service.

Sours: https://www.holley.com/products/fuel_systems/carburetors/street_strip/parts/Q-750-E85BAN


e85E85 is getting to be more and more popular in Blow thru applications.   Theres more to an E85 carb than just increasing fuel passages to flow more fuel.  E85 is a trickier fuel than gasoline and requires even more precise calibrations and air bleed controlled metering programs to operate properly.

We've spent several years perfecting our E85 design before releasing it and its now available.


e85E85 is getting to be more and more popular in Blow thru applications.   Theres more to an E85 carb than just increasing fuel passages to flow more fuel.  E85 is a trickier fuel than gasoline and requires even more precise calibrations and air bleed controlled metering programs to operate properly.

We've spent several years perfecting our E85 design before releasing it and its now available.

Our E85 Blow thru carburetor design works similar to our gasoline version.  It does not rely on sensitive boost pressured adjustable power valves to provide its metering.  Our design uses properly sized and tapered metering passages to calibrate the fuel and this also allows it to self compensate for varying boost levels.  A proper metering design increases the carburetors reliability, its repeatability as well as improves the users ability to rely on the design to perform every pass down the track.

Prices starting at $1290.00 (as shown)

For more information, visit www.prosystemsracing.com

 

 

 

Sours: http://www.competitionplus.com/drag-racing/new-products/25521-e85-blow-through-carburetors-from-pro-systems

Carburetor through e85 blow

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Cold start on a warm day e85 blow through CSU carb!

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