How fast can I go!! - Page 2 - The 1947 - Present Chevrolet & GMC Truck Message Board Network

71swb4x4 · 07-04-2010, 12:28 AM

If you have just gotten it running it's probably a tuning issue.

beebster · 07-04-2010, 02:44 AM

the fastest i've had my longhorn is 85, only cause i'm scared to go faster in that big thing. LOL

Lippyp · 07-04-2010, 05:03 AM

I bottled it at 80, the thought of stopping from anything faster with manual drums had part of my anatomy going 1 pence 10 pence 1 pence 10 pence.

toddtheodd · 07-04-2010, 08:25 AM

I've hit 100+ on the on ramp, but let off to merge with traffic.

Granted, mine isn't no stock 350 anymore.

1969C10shortbed · 07-04-2010, 01:21 PM

Quote:

Originally Posted by Longhorn Man

even an inline 6 with a 3 speed (manual or automatic) should be able to hit 100.

I'm afraid to rev my 250 past 3k rpm, so I mine won't go past 60 easily.

I don't think my little 250 could even rev past 4k, I've never tried it. And I don't want to break anything either, so I'm not going to try it.

GASoline71 · 07-04-2010, 01:30 PM

I had a worn out old 292 inline in a 1967 C10 waaayyyy back when. I rapped that thing out to 100 MPH a few times... had a 4.10 rear end in it... I know I was well past 4,000 RPM's. That engine held together just fine.

Gary

caminokid · 07-04-2010, 01:46 PM

Just had mine out on the highway 250 with a granny 4 speed. Topped out about 102. The motor was screaming. Didnt hurt it...but wont ever do that again. Glad i just put tires on it and rebuilt the front end. I wouldnt tried it before.

turner15 · 07-04-2010, 06:16 PM

I'm a teacher, ya not to upset about 81 just want to get it right. My timing plate stops at 8 degrees.

Boy there sure are some comedians on this site!!!

71c10bbsuper · 07-04-2010, 07:04 PM

my ol'e truck wiil hit 100 mph 2 gear at 5000 rpm really don't need to see what it will do in drive . your sounds like it need s some more tuning for sure good luck

71tahoe · 07-04-2010, 08:37 PM

Quote:

Originally Posted by GASoline71

I can bury mine until it points to the "H" in MPH at the bottom of the speedo...

Gary

I've done that once. I figured about 130 because the speedo was off about 10%. Scared the crap out of me. No sway bar and it was bouncing from ditch to ditch. Exactly once was enough for me.

tim21391 · 07-04-2010, 08:58 PM

[QUOTE=caminokid;4071225]If you listen to the motor...and it sounds like it is being stressed, that is when you let off. Most of my vehicles dont have tachs. Never blew one cause of no tach. Just listen to your motor.

well it was loud and i didnt wanna push it no more and thought i was goin quick enough

garyed08 · 07-04-2010, 11:51 PM

Quote:

Originally Posted by 1969C10shortbed

I'm afraid to rev my 250 past 3k rpm, so I mine won't go past 60 easily.

I don't think my little 250 could even rev past 4k, I've never tried it. And I don't want to break anything either, so I'm not going to try it.

i had a 250 in my 68 and ran it way past 3k. i had that baby screamin up to 4200. still had the 3 speed on the column and 410 gears. i ran it along side my brother with is Bonneville SSEI and we turned out 107 MPH. wasnt very easy to stop.

caminokid · 07-05-2010, 12:44 PM

[quote=tim21391;4073563]

Quote:

Originally Posted by caminokid

If you listen to the motor...and it sounds like it is being stressed, that is when you let off. Most of my vehicles dont have tachs. Never blew one cause of no tach. Just listen to your motor.

well it was loud and i didnt wanna push it no more and thought i was goin quick enough

I know the feeling. When I was out yesterday before I loaded it with tree branches and the ol lady wrecked our car....at 102 I had 50/50 thing going on in my head...50% said I was safe cause I rebuilt the front end...50% said I was going to die if I didnt get my foot out of the radiator.

hoppa · 07-05-2010, 01:22 PM

Well I have had my 'off the subject of helping him fix his truck' doing over a hundred and it has the original hampster..I did replace his wheel tho.

Have a student mash the pedal to the floor (motor NOT running) and you get the ol flash light and look down the carb to make sure the throttle is opening all the way..or if ya look on the side of carb you can watch the linkage for the secondaries..it should turn about 90 degrees when floored. Let us know what you find out.
Does the truck have a tach???
If you answer the questions we ask it really helps us help you.

turner15 · 07-09-2010, 08:06 AM

No tack, auto tranny.
I'll try your advice on the linkage when I get my son around to hold down the pedal.
Would the linkage also be turned all the way? Like does it stop at 90 degrees? (when fully opened?) I had my carb professionally rebuilt.

turner15 · 07-12-2010, 08:06 AM

success, I still have a 1/4 turn after my pedal is pushed to the floor. I was relieved to see this as this is likely the easy fix, not sure how to fix it just yet, any suggestions?

'72customdeluxe · 07-12-2010, 01:07 PM

about only having 8* in your timing plate, get a timing light that has an advance knob. 8* is not ideal

turner15 · 07-12-2010, 01:32 PM

What does the knob do? Once i'm off the plate is that not it?

turner15 · 07-12-2010, 01:33 PM

I set the timing with the vac advance disconnected and plugged

'72customdeluxe · 07-12-2010, 02:49 PM

Quote:

Originally Posted by turner15

What does the knob do? Once i'm off the plate is that not it?

the knob delays the indicated timing by the amount you want. Say you need 12* timing but your dampener only shows up to 8*. Set the knob on the light to 4* and it will light up when the dampener is at 8*

turner15 · 07-12-2010, 03:25 PM

cool

big_al_71 · 07-12-2010, 06:09 PM

like it has been mentioned you need to check because 81 is very slow..when I had the 307 in my truck with a three speed on the tree I buried the needle to where it would not go any more for at least two miles while driving to my shop to rebuild the whole truck I wanted to see if I could blow the motor but she ran and ran....I am sure I was over 95mph because I had one of my guys following me on a new truck in case she blew up and he said we were way over 95...

1969C10shortbed · 07-12-2010, 09:48 PM

Quote:

Originally Posted by GASoline71

I had a worn out old 292 inline in a 1967 C10 waaayyyy back when. I rapped that thing out to 100 MPH a few times... had a 4.10 rear end in it... I know I was well past 4,000 RPM's. That engine held together just fine.

Gary

Well, as soon as I get the SBC and the rebuilt suspension and new tires, I'll try it again. I'm not doing anything to this poor 6 cylinder except maybe selling it.

72MARIO · 07-12-2010, 10:34 PM

ARE YOU TRYING TO GET A TOW HOME AND 7 DAY LIC SUSPENSION ? Any faster than 150km on the hwy and you truck gets inpounded. If your truck is a 72 you need to get a custom hrottle cable. one you can cut to length lokar makes one and performance improvements carrys them.

turner15 · 07-13-2010, 07:49 PM

Mario I have a NOS cable from Bills trucks. I'm sure it is correct however not sure about the carb bracket. I didn't think it mattered as long as it held the cable. Not sure about the pedal itself.

07-04-2010, 12:28 AM	#26
71swb4x4 Senior Member Join Date: Nov 2003 Location: Brookings, SD Posts: 10,497	Re: How fast can I go!! If you have just gotten it running it's probably a tuning issue. __________________ Some people are like slinkies, they aren't good for anything, but you can't help but smile when you see one tumble down the stairs.

07-04-2010, 02:44 AM	#27
beebster Registered User Join Date: Jan 2009 Location: Aurora,Il ..born,raised and still live in the same house Posts: 286	Re: How fast can I go!! the fastest i've had my longhorn is 85, only cause i'm scared to go faster in that big thing. LOL __________________ I love stock! Not really into the whole bagged, squished,chopped, drooped,cut, bent,lifted,twisted,split,decked,massaged,tubbed,jacked trend. (o.k. slightly lowered is fine) For the love of god, just drive it before you forget what the truck is supposed to look like !....LOL

07-04-2010, 05:03 AM	#28
Lippyp English Chevy Owner Join Date: May 2002 Location: Shropshire, UK/ Lot, France Posts: 1,848	Re: How fast can I go!! I bottled it at 80, the thought of stopping from anything faster with manual drums had part of my anatomy going 1 pence 10 pence 1 pence 10 pence. __________________ Phil '67 C10 long fleet. 350/TH350, 4 bbl Carter, K&N, Dual exhaust, loads of stuff coming soon 2001 S10 Blazer Daily Driver, bone stock 4 door 4x4 with manual transmission

07-04-2010, 08:25 AM	#29
toddtheodd The oddest Todd around Join Date: May 2004 Location: Miami, Florida Posts: 1,418	Re: How fast can I go!! I've hit 100+ on the on ramp, but let off to merge with traffic. Granted, mine isn't no stock 350 anymore. __________________ "The greatest pleasure is to vanquish your enemies and chase them before you, to rob them of their wealth and see those dear to them bathed in tears, to ride their horses and clasp to your bosom their wives and daughters." Ghengis Khan IIOY???

07-04-2010, 01:46 PM	#32
caminokid Chevy nut Join Date: Jun 2007 Location: Springfield, Illinois Posts: 2,265	Re: How fast can I go!! Just had mine out on the highway 250 with a granny 4 speed. Topped out about 102. The motor was screaming. Didnt hurt it...but wont ever do that again. Glad i just put tires on it and rebuilt the front end. I wouldnt tried it before. __________________ 84 Chevy Custom Deluxe 1/2 Ton Named Fade To Black II "Remember kids there is NO replacement for displacement!"

07-04-2010, 06:16 PM	#33
turner15 Registered User Join Date: Jan 2007 Location: Toronto Canada Posts: 265	Re: How fast can I go!! I'm a teacher, ya not to upset about 81 just want to get it right. My timing plate stops at 8 degrees. Boy there sure are some comedians on this site!!!

07-04-2010, 07:04 PM	#34
71c10bbsuper Registered User Join Date: Jan 2007 Location: wyo Posts: 61	Re: How fast can I go!! my ol'e truck wiil hit 100 mph 2 gear at 5000 rpm really don't need to see what it will do in drive . your sounds like it need s some more tuning for sure good luck

07-04-2010, 08:58 PM	#36
tim21391 Registered User Join Date: Jul 2007 Location: Salina, Kansas Posts: 1,998	Re: How fast can I go!! [QUOTE=caminokid;4071225]If you listen to the motor...and it sounds like it is being stressed, that is when you let off. Most of my vehicles dont have tachs. Never blew one cause of no tach. Just listen to your motor. well it was loud and i didnt wanna push it no more and thought i was goin quick enough __________________ 1972 C-10...402/400..flowmaster 40 series 1967 Mustang 347 stroker/C-4 1966 Mustang 289/3-speed 2013 Mustang V6/6speed w/300 ponies I may be 23, but i sure do knows 67-72s are sexy! Its not MPG its smiles per gallon! build started 11/25/08 build thread: http://67-72chevytrucks.com/vboard/s....php?p=2993796

07-05-2010, 01:22 PM	#39
hoppa Registered User Join Date: Jun 2010 Location: Midlothian TX Posts: 56	Re: How fast can I go!! Well I have had my 'off the subject of helping him fix his truck' doing over a hundred and it has the original hampster..I did replace his wheel tho. Have a student mash the pedal to the floor (motor NOT running) and you get the ol flash light and look down the carb to make sure the throttle is opening all the way..or if ya look on the side of carb you can watch the linkage for the secondaries..it should turn about 90 degrees when floored. Let us know what you find out. Does the truck have a tach??? If you answer the questions we ask it really helps us help you. __________________ 69 SWB 505 bbc 86 GMC SWB 406 sbc 86 G20 camper cruiser van 1984 Chevy C30 Ramp truck Last edited by hoppa; 07-05-2010 at 01:23 PM.

07-09-2010, 08:06 AM	#40
turner15 Registered User Join Date: Jan 2007 Location: Toronto Canada Posts: 265	Re: How fast can I go!! No tack, auto tranny. I'll try your advice on the linkage when I get my son around to hold down the pedal. Would the linkage also be turned all the way? Like does it stop at 90 degrees? (when fully opened?) I had my carb professionally rebuilt.

07-12-2010, 08:06 AM	#41
turner15 Registered User Join Date: Jan 2007 Location: Toronto Canada Posts: 265	Re: How fast can I go!! success, I still have a 1/4 turn after my pedal is pushed to the floor. I was relieved to see this as this is likely the easy fix, not sure how to fix it just yet, any suggestions?

07-12-2010, 01:07 PM	#42
'72customdeluxe Registered User Join Date: Jan 2008 Location: Tejas Posts: 691	Re: How fast can I go!! about only having 8* in your timing plate, get a timing light that has an advance knob. 8* is not ideal __________________ '72 cheyenne super step, '05 long bed gmc

07-12-2010, 01:32 PM	#43
turner15 Registered User Join Date: Jan 2007 Location: Toronto Canada Posts: 265	Re: How fast can I go!! What does the knob do? Once i'm off the plate is that not it?

07-12-2010, 01:33 PM	#44
turner15 Registered User Join Date: Jan 2007 Location: Toronto Canada Posts: 265	Re: How fast can I go!! I set the timing with the vac advance disconnected and plugged

07-12-2010, 03:25 PM	#46
turner15 Registered User Join Date: Jan 2007 Location: Toronto Canada Posts: 265	Re: How fast can I go!! cool



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07-12-2010, 06:09 PM	#47
big_al_71 Registered User Join Date: Jun 2008 Location: South Florida Posts: 11,375	Re: How fast can I go!! like it has been mentioned you need to check because 81 is very slow..when I had the 307 in my truck with a three speed on the tree I buried the needle to where it would not go any more for at least two miles while driving to my shop to rebuild the whole truck I wanted to see if I could blow the motor but she ran and ran....I am sure I was over 95mph because I had one of my guys following me on a new truck in case she blew up and he said we were way over 95... __________________ Get your facts first, and then you can distort them as much as you please!!!!!. Sylvester's build thread >>>http://67-72chevytrucks.com/vboard/s...ht=big+rebuild

07-12-2010, 10:34 PM	#49
72MARIO Registered User Join Date: Nov 2000 Location: Huntsville Ontario Canada Posts: 4,052	Re: How fast can I go!! ARE YOU TRYING TO GET A TOW HOME AND 7 DAY LIC SUSPENSION ? Any faster than 150km on the hwy and you truck gets inpounded. If your truck is a 72 you need to get a custom hrottle cable. one you can cut to length lokar makes one and performance improvements carrys them. __________________ 1968 Suburban numbers matching all original truck now equipped with 6.0/4L80 on Accuair http://67-72chevytrucks.com/vboard/s...d.php?t=625017 1967 C/20 6.0/4L80 Roofing Truck 1990 V2500 Suburban "Plow Truck" 2005 TAHOE DD

07-13-2010, 07:49 PM	#50
turner15 Registered User Join Date: Jan 2007 Location: Toronto Canada Posts: 265	Re: How fast can I go!! Mario I have a NOS cable from Bills trucks. I'm sure it is correct however not sure about the carb bracket. I didn't think it mattered as long as it held the cable. Not sure about the pedal itself.

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