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Author Topic:   Adjust-a-jet?
65_289
Gearhead

Posts: 761
From:
Registered: Jul 2001

posted 12-18-2001 02:23 PM     Click Here to See the Profile for 65_289   Click Here to Email 65_289     Edit/Delete Message   Reply w/Quote
Has anyone ever used this thing? The idea of turning a screw to mke jetting adjustments is great, especially since my car is a dual-duty machine. I could jet for mileage on the street, and power on the strip. But for $80 per side, I want to get some opinions before I consider dropping $160 on it. Thanks.

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1965 Coupe, Tremec 3550, Steeda Tri-Ax, Cable Clutch conversion, 3.25 gears, Ford XB3 longblock, x303 heads, B-Cam, 9:1 comp., Tri-y headers, cut-outs, Ford Racing high-torque mini-starter, Pertronix Ignitor & Flamethrower coil, 650 double pumper, Edelbrock RPM intake, K&N air, Holley electric fuel pump & AFPR, dual 2-chamber Flowmasters, Summit 3-way fronts, Rancho 5-way rears, 5-leaf springs, Chrome Export Brace, Griffen Radiator, Comp. Eng. subs.

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Just Strokin
Gearhead

Posts: 754
From: Tuscaloosa, Alabama
Registered: Dec 2001

posted 12-18-2001 02:47 PM     Click Here to See the Profile for Just Strokin   Click Here to Email Just Strokin     Edit/Delete Message   Reply w/Quote
why not tyr putting in some different power vavles in the carb? you might suffer a tad on the street when you floor it, but under hard acceleration like at a drag strip, they would boost the fuel under low manifold vacuum conditions. You might try getting a primary metering block for the rear side and add a power valve there also. Probably a lot cheaper than $160.

Just my 2 cents is all.

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clevelandstyle
Gearhead

Posts: 1035
From: Connersville, IN
Registered: Jul 2001

posted 12-18-2001 10:25 PM     Click Here to See the Profile for clevelandstyle     Edit/Delete Message   Reply w/Quote
I don't trust those adjust-a-jet things. It's hard enough to understand real jets and how it effects the car. I wouldn't use them.

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Dr. Who
Gearhead

Posts: 164
From: Redwood City, Ca.
Registered: Sep 2001

posted 12-18-2001 11:00 PM     Click Here to See the Profile for Dr. Who   Click Here to Email Dr. Who     Edit/Delete Message   Reply w/Quote
I'm a dealer for "Dial A Jet" adjustable jet systems so I'm rather partial to them. If you race and drive the car they're real handy, a half turn out is a number richer and vice versa, so you can change jets in seconds (takes longer to open and close the hood than it does to adjust the jet ) in the lanes between runs in time trials.
I hope this aint too commercial Steve .

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ZEATER
Gearhead

Posts: 173
From: Mount Pleasant,IA,USA
Registered: Aug 2001

posted 12-20-2001 11:40 AM     Click Here to See the Profile for ZEATER   Click Here to Email ZEATER     Edit/Delete Message   Reply w/Quote
I've never seen a direct comparison between running the adjust a jet system compared to running with the usual jet set up. I would be interested to know if the adjust a jet negatively affects performance at all. I just assumed if they worked that well more people would be running them. They sure would save money in chassis dyno time.

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steve'66
Gearhead

Posts: 8826
From: Sonoma,CA,USA
Registered: Mar 2000

posted 12-20-2001 12:41 PM     Click Here to See the Profile for steve'66   Click Here to Email steve'66     Edit/Delete Message   Reply w/Quote
I got a pair of these from Butch, but haven't tried them yet.
They look fine, but for bracket racing I don't like to change anything during the rounds. It's hard enough reading the air and predicting the car's performance without wondering what that 1/2 turn adjustment of the jets did to the et.
They would make test and tune runs or dyno pulls a lot easier though.

SteveW

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Dr. Who
Gearhead

Posts: 164
From: Redwood City, Ca.
Registered: Sep 2001

posted 12-20-2001 04:05 PM     Click Here to See the Profile for Dr. Who   Click Here to Email Dr. Who     Edit/Delete Message   Reply w/Quote
I heard once that when toilets got put inside houses, some people were afraid to use them!
On that same note, one night at Sears Point we were pitted next to a Mopar team that had dropped a jet somewhere in the engine area (in the dark) and were franticly looking for the little devil so they could make next round.
I offered to let them use a set of our adjustables "free" so they could see how well they work and this would never happen again, but the team leader said he'd never use them cause since they're adjustable they'd change all by themselves as the car runs.
I told him we've had them on many cars both street and race for many years and they don't do that but I might as well have told the fender on his trialer .
I think it sounds too good to be true. Butcher and I have run Needles Edge back to back with genuine Holley jets and they run true size for size.
Ours have a 10 jet range and they overlap 5 sizes so we can set a car up with a range that'll work and if the combination changes we just have to change the internal jet up or down, just like a regular jet change. There's still guys out there runnin points cause they don't trust electronics!

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Moneymaker
Administrator

Posts: 25883
From: Lyons, IL, USA
Registered: May 99

posted 12-20-2001 04:25 PM     Click Here to See the Profile for Moneymaker   Click Here to Email Moneymaker     Edit/Delete Message   Reply w/Quote
I would really love to try some of those. Unfortunatly they don't fit an Autolite 4100.

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ZEATER
Gearhead

Posts: 173
From: Mount Pleasant,IA,USA
Registered: Aug 2001

posted 12-20-2001 06:07 PM     Click Here to See the Profile for ZEATER   Click Here to Email ZEATER     Edit/Delete Message   Reply w/Quote
Dr Who if you Email me where to get in touch with you I'd like to try the adjustable.
[email protected]
I have a 428 and am switching from a 750 to 850. I would like to use the sdjustable jetting on the 850.
Thanks,

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SteveLaRiviere
Administrator

Posts: 43151
From: Saco, Maine
Registered: May 99

posted 12-20-2001 06:54 PM     Click Here to See the Profile for SteveLaRiviere   Click Here to Email SteveLaRiviere     Edit/Delete Message   Reply w/Quote
quote:
Originally posted by Dr. Who:
I'm a dealer for "Dial A Jet" adjustable jet systems so I'm rather partial to them. If you race and drive the car they're real handy, a half turn out is a number richer and vice versa, so you can change jets in seconds (takes longer to open and close the hood than it does to adjust the jet ) in the lanes between runs in time trials.
I hope this aint too commercial Steve .

Nope! Sounds interesting.

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Bluegras
Journeyman

Posts: 64
From: Easton,Pa.
Registered: Nov 2001

posted 12-22-2001 11:56 PM     Click Here to See the Profile for Bluegras   Click Here to Email Bluegras     Edit/Delete Message   Reply w/Quote
Question for Dr.Who.
Would there be any different recomendation trying to run the adjustable set up on a 358 cu in sprint car engine using alcohol?
Thanks.

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Dr. Who
Gearhead

Posts: 164
From: Redwood City, Ca.
Registered: Sep 2001

posted 12-23-2001 12:43 AM     Click Here to See the Profile for Dr. Who   Click Here to Email Dr. Who     Edit/Delete Message   Reply w/Quote
The Needles Edge is made by Pat at Neal Bros Racing in Az. and he can make a set of custom flowed jets for an application like that. It's too much he said you said for me to be involved in the middle when you can have direct contact and support with the maker on a special thing. My e mail works if you want his number.

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