hey guys, im in the process of building my own turbo kit, but when i get to carbeutator i get mixed, answers....from reading the posts, all you have to do is change the floats, and make mechanical secondaries right? well the shop i am dealing with says my carburator has to be pressurized...or something.....and for a holley 600cfm, he said its going to be 500 bucks.....is this really neccesesary, i mean i not a rich man, and 500 bucks aighnt no easy money...i honestly think this guy is just trying to get money out of me....thanks for any assistance
mike

 

I'm getting my carb, upper intake, and carb hat done by Robert (680rwhp here on the boards) at www.rotaryshack.com

 

you need to get the poly holley floats(center pivots) plug up your power valves (they will pop under boost)but dont forget you have to jet the carb 8-10 times richer when you plug up the power valves, make the secondaries mechanical(vacum operated wont work with boost), make sure your carb has rubber gaskets(the paper ones blow out under boost). this is a good starting point wich wont cost you more than $40.00, i think you carb guy is squeezing you for $$$! tho carb does need to be pressurized , but this will be done when you install the carb hat. dont worry blow through systems are easy to learn about and fun/fast to drive!

p/s thanks ioTus, your car is going to fly!

 

I have been looking into this matter too, and found Corky Bell's Maximum Boost book very intresting. Tells you all about blow-through mods, aswell as suck through.
BTW: anybody knows some links to sites with carburated turbo 12A's? I want to look into it a bit more before actually starting...

 

Is it true that i can plug up my powervalves even without turbo? This one guy at the track said that it would make it accelerate faster.

 

I am running a 13b 4 port with mech secondaries. (using the stock Nikki) How well would it work for me to hook up a blow-through turbo system with this carb? Would you recommend using a different carb? If so, which one?

 

I think webbers work best with blow through.

 

yah that book is really informative! the only website with blowthrough cars on it is my site.

 

yes you can plug your powervalves, all the holley kits from racingbeat already coe plugged up. remember if you plug them up, to jet the carb richer to compensate

 

you need to get the poly holley floats(center pivots) plug up your power valves (they will pop under boost)but dont forget you have to jet the carb 8-10 times richer when you plug up the power valves, make the secondaries mechanical(vacum operated wont work with boost), make sure your carb has rubber gaskets(the paper ones blow out under boost). this is a good starting point wich wont cost you more than $40.00, i think you carb guy is squeezing you for $$$! tho carb does need to be pressurized , but this will be done when you install the carb hat. dont worry blow through systems are easy to learn about and fun/fast to drive!

p/s thanks ioTus, your car is going to fly!

<<<<<<<<<<where can i get these parts??
thanks for all the info
mike

 

any place that sells holley carbs ,,, try jegs or summit