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#1 |
P!$$ on Ford
Join Date: Jun 2003
Location: Federal Way, WA
Posts: 334
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When does your truck red line?
When i floor it it shifts from second to thrid at about 4000-4100 rpm, and i have never had it higher then that.
it just seems like a low rpm for a red line (well what i consider red line) what can your guys' engine do?
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[FONT="Impact"][COLOR="Navy"] ![]() ![]() Lowered 1972 C-20 Longbed with 350 and TH350 ![]() 1995 Tahoe LS - Custom intake, k&n, TBI spacer, sweet tail lights, clear front lights... 2009 Nissan Versa I am 26, married, and we had our first baby in July of 2009 |
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#2 |
Senior Member
![]() ![]() Join Date: Jan 2005
Location: CA
Posts: 5,525
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You can get an adjustable vacuum modulator for your transmission which will allow you to adjust the shift point.
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#3 |
Woof?
Join Date: Jun 2005
Location: Raleigh, NC
Posts: 276
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Depends. 4100 isn't very steep for a stock engine designed for torque over horsepower. I had an old 350 of some sort in my '79 Monte Carlo. Early 70's engine, I found out it came out of a *bus.* 300+ on torque, but only 165hp. I could tow a truck with that car, but the engine wouldn't make any power beyond 4000 RPM at all.
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#4 |
its all about the +6 inches
Join Date: Jan 2001
Location: Hilliard Ohio
Posts: 2,693
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Actually, the vacume modulator isn't going to do anything in this instance. When you floor it, vacume drops to near 0 and the shifting is controlled by the kick down cable and the gonenor weights.
Is your kickdown cable hooked up to the carb? |
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#5 |
Special Order
![]() ![]() Join Date: Nov 2004
Location: Mt Airy, MD
Posts: 85,859
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So,where`s the redline on a stock 350?
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"BUILDING A BETTER WAY TO SERVE THE USA"......67/72......"The New Breed" GMC '67 C1500 Wideside Super Custom SWB: 327/M22/3.42 posi.........."The '67" (project) GMC '72 K2500 Wideside Sierra Custom Camper: 350/TH350/4.10 Power-Lok..."The '72" (rolling) Tim "Don't call me a redneck. I'm a rough cut country gentleman" R.I.P. ~ East Side Low Life ~ El Jay ~ 72BLUZ ~ Fasteddie69 ~ Ron586 ~ 67ChevyRedneck ~ Grumpy Old Man ~ |
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#6 |
Senior Member
![]() ![]() Join Date: Jan 2005
Location: CA
Posts: 5,525
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Oops, sorry.
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#7 |
Cantankerous Geezer
Join Date: Aug 2002
Location: Bel Aire, KS
Posts: 6,264
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A bone stock 350 is usually limited by the ignition. HEI module usually drops out by 5,000 rpm. That's also around where the valve springs start to "float", they don't have the ability to reseat the valves between strokes fast enough. You also run into airflow problems with the heads around 5,000 rpm. If you fix these areas the bottom end is usually good for around 6,000 rpm.
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Fred There is no such thing as too much cam...just not enough engine. ![]() |
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#8 |
#16876
Join Date: Apr 2005
Location: Auburn WA
Posts: 12,266
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Seldome. Used to do it when my wife was'nt with me.
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Posted via Stationary Device '71 Custom Deluxe C-20 402. '67 Buick Special 455. '49 Plymouth Special Deluxe. "I love that old car smell" ![]() Some people are like Slinkies... not really good for anything, but they still bring a smile to your face when you push them down a flight of stairs. |
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#9 |
P!$$ on Ford
Join Date: Jun 2003
Location: Federal Way, WA
Posts: 334
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the kick down is hooked up and works, I have HEI. the engine was out to a late 60's muscle car, rebuilt put in a sprint car, rebiult again and put in the truck, then i bought the truck put on performer intake and edelbrock 650 (i think, maybe 550) carb... so i really dont know what is inside the engine, but is a c-20 and it was a custom camper truck, till i got a hold of it...
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[FONT="Impact"][COLOR="Navy"] ![]() ![]() Lowered 1972 C-20 Longbed with 350 and TH350 ![]() 1995 Tahoe LS - Custom intake, k&n, TBI spacer, sweet tail lights, clear front lights... 2009 Nissan Versa I am 26, married, and we had our first baby in July of 2009 |
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#10 |
Hittin E-Z Street on Mud Tires
![]() Join Date: Nov 2004
Location: Greenville, SC
Posts: 23,090
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If I slam and floor my 67 it will shift around 4500 RPM, but my 00 Z71 will go all the way to about 5000 if I floor it before it shifts.
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Jesse James 1967 C10 SWB Stepside: 350/700R4/3.73 1965 Ford Mustang: 289/T5-5spd/3.25 Trac-Loc 1968 Pontiac Firebird: Project Fire Chicken! 2015 Silverado Double Cab 5.3L Z71 2001 Jeep Wrangler Sport 4.0L 5spd 2020 Chevrolet Equinox Premium 2.0L Turbo 2011 Mustang V6 ~ Wife's ride ![]() American Born, Country by the Grace of God ![]() 1967 CST Shop Truck Rebuild! My 1967 C-10 Build Thread My Vintage Air A/C Install Project "On a Dime" Trying my hand at Home Renovation! 1965 Mustang Modifications! |
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#11 |
Registered User
Join Date: Jul 2005
Location: va
Posts: 2
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I usually shift mine manually at around 5500, but i have a small cam, performer rpm intake, and vortec heads.
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#12 |
Blank
Join Date: May 2005
Location: Southington, CT
Posts: 221
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check out my user title that's all I have to say!
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![]() 1969 lwb 4/6 drop 17x8-18x10 torque thrust II's 327-420hp 2004R 3.73 posi. 1977 Corvette 350-375hp 4speed, silver show car. 2002 S10 xtreme, work truck 2004.5 VW jetta GLI 1.8T 6speed, weekend warrior. 2013 Audi A3 TDI, the wife's car |
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#13 |
Registered User
![]() Join Date: Nov 2002
Location: Charlottesville, VA
Posts: 404
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350 Chevy V8, 4-bolt mains, with the following mods:
Machining work done by Terry Walters precision engines, Roanoke, VA. Bored .030 over = 355 cubic inch Align bored Parallel top of block New cam bearings New freeze plugs New hypereutectic pistons, flat top Reconditioned connecting rods Crankshaft main and rod journals ground .010 under Rotating assembly balanced Double roller timing chain Melling high volume, high pressure oil pump (Melling M55-HV oil pump?) Speed Pro cam: Intake 224 deg dur, .450â lift; Exhaust 224 deg dur, .460â lift New hydraulic lifters and push rods World Industries part #012250-1 Sportsman II cylinder heads with 72cc chambers (9.5 to 1 compression), stainless steel valves 2.02 intake, 1.6 exhaust, heavy-duty valve springs, screw-in studs, guide plates Crane part #11744-16 roller rocker arms (Rollers on both fulcrum and tip) EdelbrockÂ* # 1470 750 CFM 4-barrel carburetor Edelbrock performer RPM aluminum intake manifold HEI distributor (Late-70âs style) Dyna-max Headers Â* Note: For correct tune-up parts, such as spark plugs, cap, rotor, coil, plug wires, use parts made for a 1979 Chevy C10 pickup 350 Cu in. engine. This also applies to accessories such as the alternator, water pump, thermostat, radiator, clutch disk, pressure plate, throwout bearing, and transmission. The power steering pump and gearbox are from a 1985 Chevy truck. Previous Owner rebuilt it and set it up. He said with the work done on it and the balanced rotating parts it has a 6500 red line. I've had it there maybe twice. I use 6000 as the red line and usually shift at 5500 or so. It pulls very strong all the way to 6500. I just don't want to over rev it and have the engine eat itself.
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"Truck" '67 small window '79 350 .030 over, LT1 "clone" |
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#14 |
Account Suspended
Join Date: Mar 2003
Location: ** THE FALL GUY **CHICAGO IL
Posts: 5,883
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638 Dart
Got It Set At 7200 Rpm......
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#15 |
Just Don't Stop!
![]() Join Date: Feb 2004
Location: Dallas
Posts: 1,239
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Dyno flattened at 6800 but I shift at 6500 ish. Hard on the syncros much higher than that...
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1968 C10 build in process TT LSA/6L90e/9" |
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#16 |
Got Light Emitting Diode?
Join Date: Apr 2004
Location: Newberg, OR
Posts: 2,485
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mine sees 5500 atleast once every time i drive it
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1968 1/2 ton 2wd lwb 6 lug disc and bags up front. Next c notch and rear bags '02 Chevy Silverado LT ext cab short bed 2WD 5/7 drop on 22's ![]() 1993 Cherokee work ride/weekend wheeler |
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#17 |
Registered User
Join Date: Jun 2004
Location: Saskatchewan, Canada
Posts: 1,368
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BBC shifting at 6800, rev limiter set at 7200, but I do have a couple of aftermarket parts.
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#18 |
blood type; Retumbo
Join Date: Jan 2004
Location: next to my reloading bench
Posts: 10,269
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406 I built in a 77 Impala back in HS. redline unknown, I hit just over 8K MANY times. add in the 2.28:1 gears & all the open interstate one could ask for. I guess I was trying to duplicate Allinson's Talledega scenario (dumba$$ me). I just cant figure out why the TH350 trannys kept spitting parts. huh?!
but your problem sounds like you need to tune the trans governor.
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Man rule #77...if you own a 67 stepside with a caddy 472 you will never be in danger of loosing you man card |
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#19 |
Senior Member
Join Date: Dec 1999
Location: Saskatchewan
Posts: 1,050
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396 shifts @ 6200 rpms.
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~70 GMCprostreet swb 396/700r NOS 575 hp "the Brick" ~72 chev swb w/68 front clip "GM Millenium corvette yellow" I use and accept Paypal |
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#20 |
Registered User
Join Date: Jun 2004
Location: Beeville, Texas
Posts: 1,943
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Mine redlines after 70.
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RJD 1984 Chevrolet C30 welding truck 454/SM465 1977 GMC C15 pickup 350/TH350 1970 Chevrolet C20 pickup 350/TH400 1970 Chevrolet K20 Suburban 454/TH350 1969 GMC 8500 478M V6/5 spd winch truck |
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#21 |
Seņor Member
Join Date: May 2002
Location: Edge of the world
Posts: 5,367
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Red line? What's that?
/250 & 1-bbl //calc shows 2539 RPM at 55mph... need a tach to verify
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#22 | |
I'm watching you!
Join Date: Feb 2005
Location: Levittown, PA
Posts: 1,822
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Quote:
Mike
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2012 Chevrolet Silverado 1500 Z71 4WD 1993 Chevrolet C-1500 W/T - Blue - 4.3L V-6, 4 speed auto - Dad's (RIP) 1992 Chevrolet S10 - LS swap project 1968 Chevrolet C-10 longbed fleetside - sold ![]() |
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#23 | |
blood type; Retumbo
Join Date: Jan 2004
Location: next to my reloading bench
Posts: 10,269
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Quote:
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Man rule #77...if you own a 67 stepside with a caddy 472 you will never be in danger of loosing you man card |
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#24 |
needin' money
Join Date: May 2005
Location: Chickasha, Oklahoma
Posts: 1,106
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my 96 would shift itself at 5500 rpm's, my stock 305 would shift itself around 3500 at the most, but when i manually shifted it i would go about 4200 rpms, i haven't had my 357 that long , i rebuilt it , and then last weekend i put another carb on it, most i have had it to is 5000, but it only has around 40 miles on it, my friends 96 has been reprogrammed and his 96 shifts at 6000
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SWB Stands for Short Wide Bed Last edited by 82c10; 07-27-2005 at 11:58 PM. |
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#25 | |
Blank
Join Date: May 2005
Location: Southington, CT
Posts: 221
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Quote:
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![]() 1969 lwb 4/6 drop 17x8-18x10 torque thrust II's 327-420hp 2004R 3.73 posi. 1977 Corvette 350-375hp 4speed, silver show car. 2002 S10 xtreme, work truck 2004.5 VW jetta GLI 1.8T 6speed, weekend warrior. 2013 Audi A3 TDI, the wife's car Last edited by speedracer; 07-28-2005 at 01:38 PM. |
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