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Blower surge

29K views 44 replies 29 participants last post by  Some Kind Of Monster 
#1 ·
How do you get blower surge with carburetors. I've tried what people told me, richen up the fuel mixture and set the idle screw lower and it doesn't sound very good.
 
#2 ·
Why?????????????????????????????????

Besides, a properly set up blower system won't "surge".
 
#21 ·
It is a rich lean rich lean rich lean condition.
Thats part of it right there. Shut down the idle to one carb and force it to idle off one carb. The idle circuit in one carb will play hell trying to keep up. Empty-fill, empty-fill..... Get rid of that wimpy ass cam and get some thing with about 290 @ .050 on about 106 LSA, and install it at about 112 IC. Put the lightest springs you can in the dizzy along with the heaviest weights. Guarantee it surges. Won't run worth a damn, but who cares, it will sound bitchin and all the non blown guys will think your cool.:)LegHumpl):ameReality:)sphss



 
#19 · (Edited)
Because I like it.
when you have surge every body looks at you with the bitchen factor,when you dont nobody cares,you dont here of any race boat with out surge,its a bitchen factor and you just have to have it
hil:) Kids:)sphssOnly people not running blowers think it bithcin. People who do run blowers just think "dumb shit doesn't have a clue how to setup a carb for a blower"
 
#23 ·
I am in total agreement with GN7.

I am one of the dumb sh--s that don't have a clue (the way I feel sometimes). I worked with it, changed air bleeds several time, both ways.

I was told told three circuit carbs would not work with a blower. That didn't make sense to me, so I kept working to get rid of the surge I didn't like.

I can tune another one now a lot quicker for no surge.

Mine is a 540 BBC, Dart Pro 1 heads, 9.3 compression with 14-71 blower on gas and carbs.

It is in a Cole tr-4

No surge, leaves hard and no hesitation.

It is the only way to go. Remember, if it don't go -- Chrome it.

I like it that way.
 
#27 ·
The motors in my boat have a pretty big surge to them. From about 600-1200 RPM's. One thing a lot of guys here are forgetting is, some drive lines do not like to be shifted above a certain rpm. I run Bravo's, and they do not like to be shifted above 7-800 rpm. Trying to get a blower motor, with a decent cam, to idle below that is pretty damn hard. With the surge, I simply wait for each motor to drop down in the rpm's, and I click it right into gear. If it wasn't for the surge, I wouldn't be able to get it into gear at all.



Darrell.
 
#30 · (Edited)
With those 660's on my old motor and springs in my dizzy it would make my motor have a slow surge. It even did this when i was a kid and it had a 396 in it. Both these setups were NA (not blown). As soon as i locked out the timming though that surge went away. I could hear it trying when blipin the gas but locking out the timming definitly put a end to it. I used to like the surge on my deal when i was a kid, not so much these days. But i love the blown alky surge! :D Come on, who doesnt!

This video was the first firing of my old 468 mill, you can hear the surge after the blip http://unix-scripts.com/hb/uploads/shaunboat1.wmv

I love the way my new 498 mill sounds though locked out :)devil No surge but sounds mean to me.
 
#38 ·
Hey Steel.....


LOL...why dazzle them with brilliance when you can baffle them with bull$hit, eh?

You have been talking to 71Hallett WAY too much!!!!!! :)hand er, eh?

Jim
 
#44 ·
surging

my boat does it and the weights are locked out on the dist. carbs are set up good, 1150 annular 3 circuit (c&j engineering blueprinted them) at least they the egt's on the dyno were constant (1480), the back of the boat does not need to be cleaned when I take the boat out. I am running 30% overdrive on the blowers, large soild roller cams and stalling while shifting is a problem, the #6 drives and trans have not had a problem. but I don't think badly tuned engines are the cause of blower surging.
 
#45 ·
my boat does it and the weights are locked out on the dist. carbs are set up good, 1150 annular 3 circuit (c&j engineering blueprinted them) at least they the egt's on the dyno were constant (1480), the back of the boat does not need to be cleaned when I take the boat out. I am running 30% overdrive on the blowers, large soild roller cams and stalling while shifting is a problem, the #6 drives and trans have not had a problem. but I don't think badly tuned engines are the cause of blower surging.
Not necessarily a badly tuned engined, just not optimal ;) As stated on an outdrive it is necessary to get the boat in gear though.
 
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