Small Block & Big Block Chevy Specific Mouse & Rat Motor Discussion & Conversions

355sbc w/ Holley 750DP Tuning

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Old 08-29-2015 | 02:17 AM
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68SSJARHEAD's Avatar
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Default 355sbc w/ Holley 750DP Tuning

355ci (440hp @crank) 4 bolt main
10:5:1 CR
Forged Internals
New Style Vortec Heads Ported and Polished
Edelbrock Performer RPM AIR GAP Intake
Comp Cams Magnum 280h
Monster Stage 2 Clutch
Fidanza lightweight flywheel
Borg Warner T5 (remanufactured)
Aftermarket front and rear sway bars
Aftermarket lower control arms w/ all new polyurethrane bushings
New shocks front and rear
Holley 750 DP w/ electric choke
Full MSD Ignintion and distributor and wires
Weiand water pump
Edelbrock Air Gap Intake
Hooker Headers(2 3/4) and full 3in exhaust
3 core Fluidyne radiator w/ electric fan
all emissions removed and a/c
Flowmasters 40 series
17in American Torq Thrusts (powder coated)
Kumho Supra Ectsa Tires
Drilled/slotted rotors and aftermarket discs up front w/ new brake booster
Aftermarket Polyurethrane race motor mounts
10 bolt rear end.....
3.73 gears Posi Trac
2000 miles on engine....running full synthetic
ZZDDP oil additive for protection of flat tappet cam

I know my powerband with this motor is about 2500rpm - 6500....Car pulls extremely hard and I have no issues with it...jus seems like sometimes when in neutral and I give a quick rev its a slight hesitation like one millisecond and then it shoots all the way to redline really quick...could this be fixed w/ a little tweaking of the carb...like stated its not a BOG or a STALL jus a slight and I mean really slight stutter.....MINIMAL....I have not pulled the plugs yet the motor is really strong jus wanted to get the max outta this sb before I put the NITROUS to it....any help would be greatly appreciated, and any tips on tuning the carb...never done it before.....also forgot to mention that the car did sit for months at a time like 3 or so before being started being I was on deployments or what not...car stayed garaged and does not see weather....if this makes any difference or not...

Last edited by 68SSJARHEAD; 08-29-2015 at 06:50 AM.
Old 08-30-2015 | 02:14 PM
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Could be the accelerator pump not shooting enough fuel. Try adjusting it.
Old 10-30-2015 | 09:56 AM
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x2 holley has a vid on youtube how to adjust it just right
If it still does it (have a feeling that will fix it) then try one step larger on the primary squirter. Make sure on both nozzles it shoots out the same I had a bum squirter brand new one drizzled one shot. Replaced it with same size all was good.



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