External jet adjustment blocks

[COLOFIREMAN]

Hey there all,

Saw this on "Trucks" today, think it would work for us off-road??

LINKY (http://www.summitracing.com/parts/PHP-15002/)

http://static.summitracing.com/global/images/prod/large/php-15001.jpg

[Wayne]

good idea :thumbsup: should do the trick.

[bigun]

They have been used in drag racing for years

[Chevelleguy]

I don't think you would need it for off roading.

In the drag racing world, you have to tune for altitude and climate changes for the different tracks around the country during the racing season to squeeze every last horse power.

For normal use you get the carb adjusted out and forget about it.

[bushwood44]

Looked like it worked good.I thought it was on Horsepower TV

[aallison]

I looks trick. But unless you spend a lot of time going up and down mountains, dont see a need for it.......

[COLOFIREMAN]

Looked like it worked good.I thought it was on Horsepower TV


Your right....:o I should've said, Hey I say this on Powerblock!! Then you could've got me....;) :D

I looks trick. But unless you spend a lot of time going up and down mountains, dont see a need for it.......

I do and live at 7000 ASL, which is why I thought it would work well for that. Kinda a poor-mans fuel injection....:D

[PlasticBoob]

I considered that when I had my Truck Avenger, but was afraid they would vibrate loose at speed off-road and change the mixture.

I do and live at 7000 ASL, which is why I thought it would work well for that. Kinda a poor-mans fuel injection....:D
It would work great for that if you don't mind hooking up a vacuum gauge and fiddling. Maybe leave one permanently hooked up near the carb?

I noticed a difference when I first took my well-tuned Jeep from sea-level to Big Bear. It was one of the last nails in the carburetor's coffin, totally unacceptable. Glad I switched to TBI, but I'm thinking of adding another MAP sensor for real-time barometric correction.

[bigun]

I don't think you would need it for off roading.

In the drag racing world, you have to tune for altitude and climate changes for the different tracks around the country during the racing season to squeeze every last horse power.

For normal use you get the carb adjusted out and forget about it.
Bring your near sea level tuned carbed rig to Ouray next year and say the same LOL

[will e]

Bring your near sea level tuned carbed rig to Ouray next year and say the same LOL

I did and it sucked!

Thanks to Ralph for giving me some more appropriate jets. Power was restored. And I saved at least $28 in gas...


Swapping out the Jets on a holley is pretty easy. If you only go high once a year I would just stick with that.

[fulsizjeep]

I dunno Jason, I would be looking to spend that $100 on something more useful IMHO. If you get 60 or 62 jets for mains and the blue reusable gaskets (also carry a spare set), you can change jets pretty quick on a Holley. Since you are already at 7K, you may never need to change them unless you go to lower elevation. I have seen folks run 62s in Holleys up over Imogene almost every summer since I have been here and they run pretty good to 13K.

[aallison]

A vacuum gauge, once you learn how to properly read it, is a very valuable tool to have in the cab.

Would that not work for making carb adjsutments in the field?

[Ristow]

not for main jets.

one of these would be of little use in a 4x4.

[Chevelleguy]

Bring your near sea level tuned carbed rig to Ouray next year and say the same LOL

I did in '03, the only thing I had to change was the timing. The stock 2150 works great. Now I have TBI so it shouldn't be a problem either.