Help Big Jon pick a Carb :D

[steddy]

Absolutely nothing wrong with Quadrajets...they are the most precise of any mass produced carb out there.

And probably the most misunderstood of any carb out there.

A good introductory article...

http://www.carcraft.com/howto/57178/index.html

You're right Jeff, in the regard that the Q-jet is running good, but if there is a problem with one of the 20 something circuits, then you have a problem. Jon, don't go with the vac sec, and honestly, I'd stay away from spread bore altogether. Mech sec is a great way to go to more readily enrichen when you're wanting to get up and go quick. I've run Holleys for years and can't say any problems have come up. If it was lean, I'd throw in bigger jets, if I needed a little more lift, I'd throw in the 75cc power pump. Couldn't be more straight forward. I was never a big fan of needles, but then there are those out there that like those (ie: Edelbrock).

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Vacuum signal Vs. load......Think of a fuel map for an injection set-up. It just makes for a more "smart" carb for a street cruizer. MPG will slightly suffer on a mechanical set-up on the street. Mechanical is the way to go though for all out performance....unless of coarse you get the real deal by going to fuel injection

I believe Weiand has that SFI setup that would make it so that you just tune it from inside the car. You'll have to run O2s with it though. On the other hand, you get the PCM, intake, injectors, sensors and everything to get together.

[Phantom409]

Since its a hydraulic roller right?

No, he is running a solid Hyd. lifter.

Here is his Advertised duration 294/306.

[steddy]

No, he is running a solid Hyd. lifter.

Here is his Advertised duration 294/306.

Only thing. Lifter tick will be a way of life.

[9T8W66]

No, he is running a solid Hyd. lifter.

Here is his Advertised duration 294/306.

I think you mean Flat Tappet Hydraulic
And Advertised Duration means very little.

[bri2203]

No, he is running a solid Hyd. lifter.

Here is his Advertised duration 294/306.

Make sure you use an off Road oil like Brad Penn, Deisel Rotella T, or an oil with a ZDDP additive.


Worrry about the Carb after the engine gets assembled. Just Kidding, Glad to see you making progress Jon!

[bigjon88]

Dear lord **** it fuel injection

[Phantom409]

I think you mean Flat Tappet Hydraulic
And Advertised Duration means very little.

Yes!

[meissen]

Dear lord **** it fuel injection

Too many cooks in the kitchen yet?

[bigjon88]

nah lol gonna shoot my self and sell my motor and car and get me a bike....

[OIF1VET]

nah lol gonna shoot my self and sell my motor and car and get me a bike....

Call Holley or pro systems, tell em your setup.. They'll tell ya a carb..

[prorac1]

There are many differant ways to build a motor. I still cant figure out why hes wasting his time with a small block when swaping a big block into a third gen is easy as pie? big cubic inch, big heads, big power. But Jon has parts now, so I guess its to late to step it up, lol. Go big cubic inch, or big technoligy, or go home. Eric L

[bigjon88]

ya i am going to call tomorrow once i find out a number to call

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i dont want a big block ... i want my sbc i dont want a lot of HP

[kammi10]

so if you dont want a lot of horsepower why are you going with a solid lifter and such a big cam?

[bigjon88]

Cuz I asked creght to come up with a cam that had the meanest idle and I am doing hydr lifters

[prorac1]

I would think a 230/236 duration cam like the comp 306 we use in the lt1s would suffice, but its your car, and you have to be happy with it. Just remember this. It dosent matter how much horsepower you make at 7500 rpm, if you never go over 5500.....................and trust me, you spend a LOT more time below 3000 rpm than you do over. A nice broad torque curve is a must on a street motor. Ive said my peace, Eric L