holley 3310 issue
Thread Starter
Burning Brakes
Joined: Feb 2003
Posts: 1,246
Likes: 1
From: SouthBend IN
holley 3310 issue
i bought a 3310 for my carbed 355 . I have had a stumble of even slight popping when trying to slowly accelerate. Meaning if i'm going 50 and want to speed up to 52 it stumbles and even slightly noses over first then goes. To cure this i've had to go from the 70 stock jets in the primary to 75's. Is this normal or do you think something else could be wrong with the carb ?
Race Director
Joined: Sep 2000
Posts: 17,298
Likes: 33
From: The Top of Utah
Re: holley 3310 issue (mike 1985)
The jet change was in the primaries, only, right? If that solved the problem, you're probably fine. Otherwise, you could fine tune the accelerator pump, and maybe be able to jet back down. The hesitation IS a lack of fuel in the transition.
RACE ON!!!
RACE ON!!!
Safety Car
Joined: Feb 1999
Posts: 3,631
Likes: 14
From: Fountain Hills AZ
Re: holley 3310 issue (mike 1985)
Make sure that the shot from the accellerater pump occurs as soon as the throttle moves. Even a slight delay can cause the problem you described. If needed, the adjustment is a simple twist of a screw.
Race Director
Joined: Sep 2000
Posts: 17,298
Likes: 33
From: The Top of Utah
Re: holley 3310 issue (Vetterodder)
Make sure that the shot from the accellerater pump occurs as soon as the throttle moves.
I hope that is a pretty highly modified engine. The 3310 is a vacuum secondary, 750 cfm, isn't it? That is pretty big for 355 cid. If it has high gears (numerically low) the idle circuit may still be in play at 50 mph.
RACE ON!!!
Thread Starter
Burning Brakes
Joined: Feb 2003
Posts: 1,246
Likes: 1
From: SouthBend IN
Re: holley 3310 issue (CFI-EFI)
i have played and played with the cams, squirters, even have gone as high as a #37 tube type and preloaded the acc pump 1/2 turn. I have found the blue cam in the #2 position to be the best with the stock #31 squirter. Your probably right about the idle circuit, 1/4 turn out or in makes a difference as to how the car runs. It prefers out.
The issue i'm working through right now is at 4200-4300 RPM when at WOT it just sort of hesitates. This seems to only happen when accelerating hard from a dead stop. I have a 0-60 timer on the speedo. So i'm trying toi tune through that with the secondary springs and jetting ( i have bought the secondary metering block) Right now i have 75 primary and 78 secondary.
The combo is
355
9.3-1
180CC Dart iron eagles
224-235 @ .050 112 LSA 495-510 lift
weiand staelth dual plane
750 VS carb...choke horn milled off
turbo 350
10" 2800 stall
3.07 geras
26" tall tire.
1-3/4 " long tubes with 2.5" ex.
The big ex. is because i plan to spray 200 to it when i get the motor right.
My friend has a 650 DP i might try too, i'm thinking the 750 might be too big.
The issue i'm working through right now is at 4200-4300 RPM when at WOT it just sort of hesitates. This seems to only happen when accelerating hard from a dead stop. I have a 0-60 timer on the speedo. So i'm trying toi tune through that with the secondary springs and jetting ( i have bought the secondary metering block) Right now i have 75 primary and 78 secondary.
The combo is
355
9.3-1
180CC Dart iron eagles
224-235 @ .050 112 LSA 495-510 lift
weiand staelth dual plane
750 VS carb...choke horn milled off
turbo 350
10" 2800 stall
3.07 geras
26" tall tire.
1-3/4 " long tubes with 2.5" ex.
The big ex. is because i plan to spray 200 to it when i get the motor right.
My friend has a 650 DP i might try too, i'm thinking the 750 might be too big.
Race Director
Joined: Sep 2000
Posts: 17,298
Likes: 33
From: The Top of Utah
Re: holley 3310 issue (mike 1985)
The combo is
1.) 355
2.) 9.3-1
3.) 180CC Dart iron eagles
4.) 224-235 @ .050 112 LSA 495-510 lift
5.) weiand staelth dual plane
6.) 750 VS carb...choke horn milled off
7.) turbo 350
8.) 10" 2800 stall
9.) 3.07 geras
10.) 26" tall tire.
11.) 1-3/4 " long tubes with 2.5" ex.
The big ex. is because i plan to spray 200 to it when i get the motor right.
My friend has a 650 DP i might try too, i'm thinking the 750 might be too big.
1.) 355
2.) 9.3-1
3.) 180CC Dart iron eagles
4.) 224-235 @ .050 112 LSA 495-510 lift
5.) weiand staelth dual plane
6.) 750 VS carb...choke horn milled off
7.) turbo 350
8.) 10" 2800 stall
9.) 3.07 geras
10.) 26" tall tire.
11.) 1-3/4 " long tubes with 2.5" ex.
The big ex. is because i plan to spray 200 to it when i get the motor right.
My friend has a 650 DP i might try too, i'm thinking the 750 might be too big.
RACE ON!!!
Thread Starter
Burning Brakes
Joined: Feb 2003
Posts: 1,246
Likes: 1
From: SouthBend IN
Re: holley 3310 issue (CFI-EFI)
ok thanks.
actually the cam power range is 2500-5500, the intake idle -6800 and one of the few that fitr under the stock hood. and a that's why i went with the 750 VS carb, opens the secondaries as needed. I plan to try the 650 this weekend and i'll get back with the results.
the headers most likley are too big, but what if the car has a 406 in it 3-5 yrs from now ? Or i may just trade them on the board for smaller ones.
The comp had to be 9.3-1 due to pump gas and iron heads, in retrospect i should have bought a smaller cam
Thanks for your time
actually the cam power range is 2500-5500, the intake idle -6800 and one of the few that fitr under the stock hood. and a that's why i went with the 750 VS carb, opens the secondaries as needed. I plan to try the 650 this weekend and i'll get back with the results.
the headers most likley are too big, but what if the car has a 406 in it 3-5 yrs from now ? Or i may just trade them on the board for smaller ones.
The comp had to be 9.3-1 due to pump gas and iron heads, in retrospect i should have bought a smaller cam
Thanks for your time
Corvette Stories
The Best of Corvette for Corvette Enthusiasts
Top 10 Most Expensive Corvettes Ever Sold on Bring A Trailer
Brett Foote
10 Things Every Corvette Owner Needs (2026 Edition)
Michael S. Palmer
8 Most "Only Corvette Owners Understand" Quirks and Problems
Pouria Savadkouei
10 Reasons the C6 Z06 is Still A Performance Benchmark After 20 Years
Joe Kucinski
How Much Horsepower Every Corvette Engine "LOST" in 1972
Joe Kucinski
Top 10 DOs and DON'Ts for Protecting Your Convertible Top!
Michael S. Palmer
Top 10 Most Explosive Corvettes Ever Made: Power-to-Weight Ratio Ranked!
Joe Kucinski
150 hp to 1,250 hp: Every Corvette Generation Compared by the Specs That Matter
Joe Kucinski
