what gears for prostreet truck - The 1947 - Present Chevrolet & GMC Truck Message Board Network

69trk · 09-29-2007, 08:52 AM

69 chevy shortbed with 431 big block, turbo 400 with 3800 stall, new 28/14.5/16 hoosier qtp tires. Has 373 gears and was wondering if 410 would pick up my et. ran a best 11.96 at 110 with 1.76 60 ft on worn out 10 in slicks spinning off the line. I can't remember what rpm i was going through the traps it seamed to be around 5800. Redlines at 7000 rpm.

69trk · 09-29-2007, 08:56 AM

wish i had some up to date pictures. truck looks a lot better now, all the wiring is gone under the hood, have all new chrome on outside of truck with new centerline 16 in. rims, disk brakes on front, won best custom truck at two car shows this year.

djracer · 09-29-2007, 09:16 AM

sweet truck! if you don't run allot on the highway the 4.10's probably would be a little quicker at the track!

69trk · 09-29-2007, 10:07 AM

here's a few more pictures

**67 cst swb** · 09-29-2007, 05:08 PM

you want to be going thru the traps at peak HP rpm. So if it redlines at 7000, your going thru at 5800 or so, you might wanna stay were your at. Might slow down if you increase to much. too bad they don't make a 3.90 gear for our 12 bolt truck rearends

69trk · 09-30-2007, 04:03 PM

looked at my dyno sheets and its peak hp 684 at 6900 rpm and i'm making 614 at 5800 and peak torq of 579 at 5000 rpm. That's telling me that maybe my converter is to tight at 3800. I just think that with this much power it ought to be quicker than what it ran. Hopefully the new slicks will help. Any advice on converter selection?

djracer · 09-30-2007, 04:19 PM

that's a stout motor! What does the truck weigh? What size slick you going with?

69trk · 09-30-2007, 05:36 PM

it's the hoosier qtp 28/14.5/16, the other slicks that i had on it before were a set of used 28x10.5/16, a friend of mine watched me leave the line and he said that i was spinning pretty good off the line and i did a real good burn out. If anything my reaction time was a .000 using the trans brake. Not sure what truck weighs, was told around 4800lbs. Saved a little weight by removing all ac stuff, aluminum driveshaft etc. Like to put a fiberglass cowl hood and fiberglass chrome plated bumpers, but would like the truck to look kind of stock. Don't care to drive it on street very much, so i bought a 18ft car hauler.

djracer · 09-30-2007, 06:25 PM

Mine is kind of backwards! I have a glass nose and glass doors but I have a chrome steel bumper on the front. It doesn't have all the brackets though. I have a fatman frontend that swaps you to a mustang II front suspension. It will drop probably 150lbs.

69trk · 09-30-2007, 06:31 PM

you're truck looks great, i thought about doing the fatbar for the rear from no limit but they said that my trailering arms with coil springs and some drag shocks would be just fine. Plus if i had 1000 to spend on that and only pick up a 10th or so i would just go with nitrous. I'm close to having to put a roll bar in the truck anyway.

djracer · 09-30-2007, 06:47 PM

If you check ebay you can get a plate system cheap you just may have to buy it in pieces! I have a plate now but I have a fogger that I need to add.

09-29-2007, 08:52 AM	#1
69trk Registered User Join Date: Oct 2006 Location: bridgecreek ok. Posts: 1,214	what gears for prostreet truck 69 chevy shortbed with 431 big block, turbo 400 with 3800 stall, new 28/14.5/16 hoosier qtp tires. Has 373 gears and was wondering if 410 would pick up my et. ran a best 11.96 at 110 with 1.76 60 ft on worn out 10 in slicks spinning off the line. I can't remember what rpm i was going through the traps it seamed to be around 5800. Redlines at 7000 rpm. Attached Images

09-29-2007, 08:56 AM	#2
69trk Registered User Join Date: Oct 2006 Location: bridgecreek ok. Posts: 1,214	Re: what gears for prostreet truck wish i had some up to date pictures. truck looks a lot better now, all the wiring is gone under the hood, have all new chrome on outside of truck with new centerline 16 in. rims, disk brakes on front, won best custom truck at two car shows this year.

09-29-2007, 09:16 AM	#3
djracer Registered User Join Date: Feb 2001 Location: Wetumpka, Al, U.S. Posts: 8,892	Re: what gears for prostreet truck sweet truck! if you don't run allot on the highway the 4.10's probably would be a little quicker at the track! __________________ Kevin Special Thanks to All who have helped on the TRUCK! My Pass Time Show http://s129.photobucket.com/albums/p...Chapter1-0.mp4 So Far my best Times are: Motor only: 6.44 1/8 @ 104.13 10.39 1/4 @ 125.83 Nitrous Times: 5.785 1/8 @ 118.65 with a 1.336 60ft 9.168 1/4 @ 142.58 with a 250 shot dead out of the hole!

09-29-2007, 10:07 AM	#4
69trk Registered User Join Date: Oct 2006 Location: bridgecreek ok. Posts: 1,214	Re: what gears for prostreet truck here's a few more pictures Attached Images

09-29-2007, 05:08 PM	#5
67 cst swb Senior Member Join Date: Nov 2001 Location: Rapid City, SD Posts: 2,281	Re: what gears for prostreet truck you want to be going thru the traps at peak HP rpm. So if it redlines at 7000, your going thru at 5800 or so, you might wanna stay were your at. Might slow down if you increase to much. too bad they don't make a 3.90 gear for our 12 bolt truck rearends __________________ My Trucks: 1967 Chevrolet Short Wide Box 327 TH350 9" w/3.90 gears paint will be White - Current Project 1967 Chevrolet Custom LWB 283 TH400 3.73 Posi, no-AC, no-PS, no-PB, bench-seat, small-window - mostly orig driver 1967 Chevrolet CST LWB originally a 327 TH400 3.73 Posi AC PS PB, had Buddy Buckets, Small Window - parts truck 1967 Chevrolet CST LWB, 283 MT 3.73 had Buddy Buckets, Panoramic Window - parts truck 2001 Chevrolet 3500 2WD Crew Cab Dually 8.1L Allison White

09-30-2007, 04:03 PM	#6
69trk Registered User Join Date: Oct 2006 Location: bridgecreek ok. Posts: 1,214	Re: what gears for prostreet truck looked at my dyno sheets and its peak hp 684 at 6900 rpm and i'm making 614 at 5800 and peak torq of 579 at 5000 rpm. That's telling me that maybe my converter is to tight at 3800. I just think that with this much power it ought to be quicker than what it ran. Hopefully the new slicks will help. Any advice on converter selection?

09-30-2007, 04:19 PM	#7
djracer Registered User Join Date: Feb 2001 Location: Wetumpka, Al, U.S. Posts: 8,892	Re: what gears for prostreet truck that's a stout motor! What does the truck weigh? What size slick you going with? __________________ Kevin Special Thanks to All who have helped on the TRUCK! My Pass Time Show http://s129.photobucket.com/albums/p...Chapter1-0.mp4 So Far my best Times are: Motor only: 6.44 1/8 @ 104.13 10.39 1/4 @ 125.83 Nitrous Times: 5.785 1/8 @ 118.65 with a 1.336 60ft 9.168 1/4 @ 142.58 with a 250 shot dead out of the hole!

09-30-2007, 05:36 PM	#8
69trk Registered User Join Date: Oct 2006 Location: bridgecreek ok. Posts: 1,214	Re: what gears for prostreet truck it's the hoosier qtp 28/14.5/16, the other slicks that i had on it before were a set of used 28x10.5/16, a friend of mine watched me leave the line and he said that i was spinning pretty good off the line and i did a real good burn out. If anything my reaction time was a .000 using the trans brake. Not sure what truck weighs, was told around 4800lbs. Saved a little weight by removing all ac stuff, aluminum driveshaft etc. Like to put a fiberglass cowl hood and fiberglass chrome plated bumpers, but would like the truck to look kind of stock. Don't care to drive it on street very much, so i bought a 18ft car hauler. Last edited by 69trk; 09-30-2007 at 05:41 PM.

09-30-2007, 06:25 PM	#9
djracer Registered User Join Date: Feb 2001 Location: Wetumpka, Al, U.S. Posts: 8,892	Re: what gears for prostreet truck Mine is kind of backwards! I have a glass nose and glass doors but I have a chrome steel bumper on the front. It doesn't have all the brackets though. I have a fatman frontend that swaps you to a mustang II front suspension. It will drop probably 150lbs. __________________ Kevin Special Thanks to All who have helped on the TRUCK! My Pass Time Show http://s129.photobucket.com/albums/p...Chapter1-0.mp4 So Far my best Times are: Motor only: 6.44 1/8 @ 104.13 10.39 1/4 @ 125.83 Nitrous Times: 5.785 1/8 @ 118.65 with a 1.336 60ft 9.168 1/4 @ 142.58 with a 250 shot dead out of the hole!

09-30-2007, 06:31 PM	#10
69trk Registered User Join Date: Oct 2006 Location: bridgecreek ok. Posts: 1,214	Re: what gears for prostreet truck you're truck looks great, i thought about doing the fatbar for the rear from no limit but they said that my trailering arms with coil springs and some drag shocks would be just fine. Plus if i had 1000 to spend on that and only pick up a 10th or so i would just go with nitrous. I'm close to having to put a roll bar in the truck anyway.

09-30-2007, 06:47 PM	#11
djracer Registered User Join Date: Feb 2001 Location: Wetumpka, Al, U.S. Posts: 8,892	Re: what gears for prostreet truck If you check ebay you can get a plate system cheap you just may have to buy it in pieces! I have a plate now but I have a fogger that I need to add. __________________ Kevin Special Thanks to All who have helped on the TRUCK! My Pass Time Show http://s129.photobucket.com/albums/p...Chapter1-0.mp4 So Far my best Times are: Motor only: 6.44 1/8 @ 104.13 10.39 1/4 @ 125.83 Nitrous Times: 5.785 1/8 @ 118.65 with a 1.336 60ft 9.168 1/4 @ 142.58 with a 250 shot dead out of the hole!



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