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Author Topic:   Alky jetting
Dirt Maniac

Total posts: 196
posted March 27, 2005 06:10 PM  
Switched from gas to alky last year and i barrowed a holley that .130 jets in it.
I just got my Barry Grant back from being switched and it has .180 jets in it.
Does this seem HUGE????

Dirt Forum Champ
Total posts: 1261
posted March 27, 2005 06:17 PM  
It all depends on how they do the metering blocks.. I have seen em with like 86 jets....130 and 175ish it all depends on who and how they do the metering!

Fastride 38
Dirt Maniac

Total posts: 125
posted March 27, 2005 06:45 PM  
When you go to tune the carb for your car...just remember that the temp of the motor is the key...if the motor is running cold the carb is jetted to much....if the carb is lean the motor will run hot...Also the temp that alky burns the best is around 210 to 220....Hope this helps...

Dirt Newbie

Total posts: 1
posted March 27, 2005 10:10 PM  
You really need someone that knows what they are doing to look @ the plugs, that's the only way to know for sure what is going on (short of putting it on a dyno). Water temp can vary with ambient temp & how big the radiater is, I've seen motors burn a piston @ 150* on the water. Alcohol motors don't mind being a little on the fat side, If it doesn't blubber & the plugs look good your probably close, better to be safe than sorry.
Hope this helps.

Dirt Forum Champ
Total posts: 755
posted March 28, 2005 07:31 AM  
I've ran 192's in my old demon before. Dirtmodd33 offered some good insight.

Dirt Freak

Total posts: 334
posted March 28, 2005 08:39 AM  
I agree with dirtracer14...

We used the plugs to tune and finally got to 98s in the front and 104s in the rear on our Holley. It just all depends on how the metering blocks are drilled.

Dirt Forum Champ
Total posts: 570
posted March 28, 2005 03:24 PM  
I used a Barry Grant carb for 3 years, I never needed to do anything to that carb, it worked great right out of the box. provided you supplied them with all the info they need.

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