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Question for the 9 second small-block NA guys #1580269 02/17/14 01:01 PM 02/17/14 01:01 PM
Joined: Feb 2005 Posts: 20,181 PA. pittsburghracer OP "Little"John
pittsburghracer OP "Little"John Joined: Feb 2005 Posts: 20,181 PA.	I ran some 10.00's in my 408 Duster last year and my combo was running out of steam at about the 1000 ft line. Several issues going on as I was under cammed (550 lift solid), under carbed (750), the heads were only flowing about 270cfm, and I was running pump gas. There is a 4:88 gear in the car now and a 14-32 Micky Thompson slick. This years engine will a roller cam and app 670 lift, 850 alcohol or 1050 dominator, 40 plus more cfm, 2 points higher compression, and either race gas or alcohol. Now for the question aimed for guys running in the 9's NA. Do you think a 4:30 gear would work better with this combo. If and when I go big block in this car I will probably install 4:30's in the dana but would like keep costs down a little right now. What gear are you guys running and if possible what are you shifting at and what is your trap RPM. Only other thing to add is the car weights 2850 and has a powerglide in it. 1970 Duster Edelbrock headed 408 5.984@112.52 422 Indy headed small block 5.982@112.56 mph 9.42@138.27 Livin and lovin life one day at a time

Re: Question for the 9 second small-block NA guys [Re: pittsburghracer] #1580270 02/17/14 01:26 PM 02/17/14 01:26 PM
Joined: Jan 2004 Posts: 13,247 Mt. Vernon, Ohio dartman366 I Live Here
dartman366 I Live Here Joined: Jan 2004 Posts: 13,247 Mt. Vernon, Ohio	I run a dana with 4.56 gears and I shift at 6800 and trap at 7200 my slick size is 14X31X15 and my car weight is similar to yours, I do run a 904 behind my 408. Light travels faster than the speed of sound,,,this is why some people seem bright untill you hear them speak.

Re: Question for the 9 second small-block NA guys [Re: dartman366] #1580271 02/17/14 01:34 PM 02/17/14 01:34 PM
Joined: Feb 2005 Posts: 20,181 PA. pittsburghracer OP "Little"John
pittsburghracer OP "Little"John Joined: Feb 2005 Posts: 20,181 PA.	Quote: I run a dana with 4.56 gears and I shift at 6800 and trap at 7200 my slick size is 14X31X15 and my car weight is similar to yours, I do run a 904 behind my 408. So we are probably geared pretty close with the tire size difference. I try not to beat the heck out of stuff but 7200-7500 shouldn't be a real issue. Powerglide may help to keep the RPM's down a little too. Thanks for the info. 1970 Duster Edelbrock headed 408 5.984@112.52 422 Indy headed small block 5.982@112.56 mph 9.42@138.27 Livin and lovin life one day at a time

Re: Question for the 9 second small-block NA guys [Re: dartman366] #1580272 02/17/14 01:43 PM 02/17/14 01:43 PM
Joined: Jan 2003 Posts: 4,002 Joplin, Mo R rt66jim master
rt66jim master R Joined: Jan 2003 Posts: 4,002 Joplin, Mo	Quote: I run a dana with 4.56 gears and I shift at 6800 and trap at 7200 my slick size is 14X31X15 and my car weight is similar to yours, I do run a 904 behind my 408. John I don't mean to hijack your post. I was just wondering what width rim you and Bill are running those tires on? Jim

Re: Question for the 9 second small-block NA guys [Re: rt66jim] #1580273 02/17/14 01:48 PM 02/17/14 01:48 PM
Joined: Feb 2005 Posts: 20,181 PA. pittsburghracer OP "Little"John
pittsburghracer OP "Little"John Joined: Feb 2005 Posts: 20,181 PA.	Quote: Quote: I run a dana with 4.56 gears and I shift at 6800 and trap at 7200 my slick size is 14X31X15 and my car weight is similar to yours, I do run a 904 behind my 408. John I don't mean to hijack your post. I was just wondering what width rim you and Bill are running those tires on? Jim Jim I bought new rims last year and I talked to the guy from Micky Thompson before ordering them as I had 12 inch wheels and 14-32 slicks on the car when I bought it. He said go 14 inch wide to improve the foot-print contact so I went with the 14 inch wide wheels. 1970 Duster Edelbrock headed 408 5.984@112.52 422 Indy headed small block 5.982@112.56 mph 9.42@138.27 Livin and lovin life one day at a time

Re: Question for the 9 second small-block NA guys [Re: pittsburghracer] #1580274 02/17/14 01:56 PM 02/17/14 01:56 PM
Joined: Jan 2004 Posts: 13,247 Mt. Vernon, Ohio dartman366 I Live Here
dartman366 I Live Here Joined: Jan 2004 Posts: 13,247 Mt. Vernon, Ohio	Quote: Quote: Quote: I run a dana with 4.56 gears and I shift at 6800 and trap at 7200 my slick size is 14X31X15 and my car weight is similar to yours, I do run a 904 behind my 408. John I don't mean to hijack your post. I was just wondering what width rim you and Bill are running those tires on? Jim Jim I bought new rims last year and I talked to the guy from Micky Thompson before ordering them as I had 12 inch wheels and 14-32 slicks on the car when I bought it. He said go 14 inch wide to improve the foot-print contact so I went with the 14 inch wide wheels. I went 14" also as I intend to go to a 14X32 later, and yes it seems to give a better footprint. Light travels faster than the speed of sound,,,this is why some people seem bright untill you hear them speak.

Re: Question for the 9 second small-block NA guys [Re: pittsburghracer] #1580275 02/17/14 08:08 PM 02/17/14 08:08 PM
Joined: Mar 2006 Posts: 9,847 MI, usa dvw master
dvw master Joined: Mar 2006 Posts: 9,847 MI, usa	Quote: I ran some 10.00's in my 408 Duster last year and my combo was running out of steam at about the 1000 ft line. Several issues going on as I was under cammed (550 lift solid), under carbed (750), the heads were only flowing about 270cfm, and I was running pump gas. There is a 4:88 gear in the car now and a 14-32 Micky Thompson slick. This years engine will a roller cam and app 670 lift, 850 alcohol or 1050 dominator, 40 plus more cfm, 2 points higher compression, and either race gas or alcohol. Now for the question aimed for guys running in the 9's NA. Do you think a 4:30 gear would work better with this combo. If and when I go big block in this car I will probably install 4:30's in the dana but would like keep costs down a little right now. What gear are you guys running and if possible what are you shifting at and what is your trap RPM. Only other thing to add is the car weights 2850 and has a powerglide in it. I have to believe 32" tire, a glide, and a 4.30 would be weak down low. How fast do you anticipate? 140? less? How many rpm do want to run it in the traps? My bet is 4.56 Doug

Re: Question for the 9 second small-block NA guys [Re: dvw] #1580276 02/17/14 08:23 PM 02/17/14 08:23 PM
Joined: Jan 2003 Posts: 4,002 Joplin, Mo R rt66jim master
rt66jim master R Joined: Jan 2003 Posts: 4,002 Joplin, Mo	John I put my combo thru the Wallace calculators. It tells me with a 4.30 gear and wanting to turn the motor 7000. I need a 31" tire.

Re: Question for the 9 second small-block NA guys [Re: dvw] #1580277 02/17/14 08:29 PM 02/17/14 08:29 PM
Joined: Feb 2005 Posts: 20,181 PA. pittsburghracer OP "Little"John
pittsburghracer OP "Little"John Joined: Feb 2005 Posts: 20,181 PA.	I have to believe 32" tire, a glide, and a 4.30 would be weak down low. How fast do you anticipate? 140? less? How many rpm do want to run it in the traps? My bet is 4.56 Doug Doug its only trapping at 130mph now but like I said its running out of get up and go. I was only shifting this combo at 6400 and really slowed up even at 6800. I know more cam, more head, and the bigger carb will help but how much I don't know. This car only weighed 2550 when my son was driving it. Between my lard azz, removing the fiberglass doors, alternator, racepak, and a few other goodies we fattened her up some. 140 mph would really make me happy with this combo but I don't see it happening but time will tell. I won't install 4:56 because I really like a 4:30 gear with a big block and its coming sooner or later. If it was a Ford 9 inch I could use my spare 4:30 carrier from the Daytona. 1970 Duster Edelbrock headed 408 5.984@112.52 422 Indy headed small block 5.982@112.56 mph 9.42@138.27 Livin and lovin life one day at a time

Re: Question for the 9 second small-block NA guys [Re: rt66jim] #1580278 02/17/14 08:32 PM 02/17/14 08:32 PM
Joined: Jul 2007 Posts: 251 bonney lake washington W w2stroker enthusiast
w2stroker enthusiast W Joined: Jul 2007 Posts: 251 bonney lake washington	i run a 29" tall tire with a 4.30 gear. i shift at 7500 and cross the line at 7800. best et thus far 9.79 @ 138.71 with A 60' of 1.42. my best 60' ever was a 1.34 its kinda my weak area that i'm still working on

Re: Question for the 9 second small-block NA guys [Re: rt66jim] #1580279 02/17/14 08:40 PM 02/17/14 08:40 PM
Joined: Feb 2005 Posts: 20,181 PA. pittsburghracer OP "Little"John
pittsburghracer OP "Little"John Joined: Feb 2005 Posts: 20,181 PA.	Quote: John I put my combo thru the Wallace calculators. It tells me with a 4.30 gear and wanting to turn the motor 7000. I need a 31" tire. Ya but your talking big block right? I went down that road before in my 74 Duster (4.56 gear 14-31 tire) and a 4.88 gear 14-32 tire in my old 69 Dart. Both big block cars, higher torque, relatively lite cars. (2600 and 2800). My fear was what Doug was saying about smallblock powerglide combos and the lack of big block torque. I really didn't want to buy gears for this years combo and SLOW UP. I hate that. 1970 Duster Edelbrock headed 408 5.984@112.52 422 Indy headed small block 5.982@112.56 mph 9.42@138.27 Livin and lovin life one day at a time

Re: Question for the 9 second small-block NA guys [Re: w2stroker] #1580280 02/17/14 08:44 PM 02/17/14 08:44 PM
Joined: Feb 2005 Posts: 20,181 PA. pittsburghracer OP "Little"John
pittsburghracer OP "Little"John Joined: Feb 2005 Posts: 20,181 PA.	Quote: i run a 29" tall tire with a 4.30 gear. i shift at 7500 and cross the line at 7800. best et thus far 9.79 @ 138.71 with A 60' of 1.42. my best 60' ever was a 1.34 its kinda my weak area that i'm still working on My average 60 foot last year with the glide was 1.37 and usually around 6.36@106mph in the 1/8. 1970 Duster Edelbrock headed 408 5.984@112.52 422 Indy headed small block 5.982@112.56 mph 9.42@138.27 Livin and lovin life one day at a time

Re: Question for the 9 second small-block NA guys [Re: pittsburghracer] #1580281 02/17/14 09:28 PM 02/17/14 09:28 PM
Joined: Dec 2012 Posts: 41 PA R R5P7 Bantam member
R5P7 Bantam member R Joined: Dec 2012 Posts: 41 PA	We're running 9.20's in the heat of the summer (90's w/50+ RH) in eastern PA and 9.0's in the spring and fall months. 410 sb with a 1.80 first gear in the glide and 60' is 1.22-1.25 all year long. Dana with 5.14 or 4.88 (no gain or loss in et either way, just rpm) and a 14-32 tire on a 12" rim. This is waaaaaay tooooooooo much tire, but it hooks on ice and we're bracket racing so AOK for me. The narrow rim allows the tire to grow to roughly 35.5" at the finish line, thus giving me the numeric gear ratio on the hit and lower numeric gear on the top end. Oh, and I shift at 7000-7500 (depending on the look of the race) and cross under 7500 (w/4.88). Now, the other year we had great air and it was going 8500 w/ the 5.14 at 150 mph. My motto, let them eat and run them HOT!!!! I twist all my motors up and still get hundreds of runs before freshening. Mike

Re: Question for the 9 second small-block NA guys [Re: R5P7 Bantam] #1580282 02/17/14 11:12 PM 02/17/14 11:12 PM
Joined: May 2003 Posts: 13,198 aZLiViN J J_BODY I Live Here
J_BODY I Live Here J Joined: May 2003 Posts: 13,198 aZLiViN	D-60 with 4.30 gears and 29.5 tire is what's in our Duster. Worked great with our 4" W5 mill that was 9.8 capable. Believe it trapped around 6800. Unfortunately that same combo didn't work well this weekend with our 440hp iron head 360! We're leaving it be as we believe it will adapt well in/when the W8 mill finally gets fitted.

Re: Question for the 9 second small-block NA guys [Re: pittsburghracer] #1580283 02/17/14 11:19 PM 02/17/14 11:19 PM
Joined: Mar 2008 Posts: 883 Affton MO Q qwkmopardan super stock
qwkmopardan super stock Q Joined: Mar 2008 Posts: 883 Affton MO	My demon runs the same with 4.88 or 4.56 gears. With the 4.56 gear finish line RPM is 7200 +/- and with 4.88 its getting close to 7800RPM in good air. The quickest pass ever was with the 4.56 gears, but in mine shaft air. 13"x31" Goodyears

Re: Question for the 9 second small-block NA guys [Re: qwkmopardan] #1580284 02/17/14 11:32 PM 02/17/14 11:32 PM
Joined: Sep 2004 Posts: 1,499 San Antonio,TX 4 440W8 Duster pro stock
440W8 Duster pro stock 4 Joined: Sep 2004 Posts: 1,499 San Antonio,TX	I have a 440 W8 motor with a 1.80 glide 4.56 gear 29.5 11.5W tire I shift at 7800rpm. best 60ft is 1.29 with an avg 1.32 with a tight converter.going to a 4.88 gear this year. Best 1/8 mile is 5.79@ 120 at 3085 lbs. http://youtu.be/RTDkU8WCjLo Last edited by 440W8 Duster; 02/17/14 11:33 PM. 70 Duster W8 motor. 1.29 60ft 5.79 1/8 at 120 mph glide with 1.80 gear @3170 lbs.

Re: Question for the 9 second small-block NA guys [Re: pittsburghracer] #1580285 02/17/14 11:35 PM 02/17/14 11:35 PM
Joined: Jun 2003 Posts: 52,972 Romeo MI MR_P_BODY Master
MR_P_BODY Master Joined: Jun 2003 Posts: 52,972 Romeo MI	With my 395" and 14 X 31 and a 4.88 I was running a 9.56 with a 1.27 60'... rpm through was 7600... that was on a 12" rim... I wouldnt drop to the 4.30 unless you cant turn the revs.. due to cam

Re: Question for the 9 second small-block NA guys [Re: MR_P_BODY] #1580286 02/17/14 11:41 PM 02/17/14 11:41 PM
Joined: Feb 2005 Posts: 20,181 PA. pittsburghracer OP "Little"John
pittsburghracer OP "Little"John Joined: Feb 2005 Posts: 20,181 PA.	Well I placed my Summit order today for my new wheels and some roller lifter for the new higher compression build and I passed on the 4.30 gears for now. Had a 10% off coupon I had to use up. I know it will still be head and cam limited but back to big blocks soon so no sense in buying a good after market block. Thanks guys for sharing some info. 1970 Duster Edelbrock headed 408 5.984@112.52 422 Indy headed small block 5.982@112.56 mph 9.42@138.27 Livin and lovin life one day at a time

Re: Question for the 9 second small-block NA guys [Re: 440W8 Duster] #1580287 02/18/14 02:03 AM 02/18/14 02:03 AM
Joined: Mar 2008 Posts: 883 Affton MO Q qwkmopardan super stock
qwkmopardan super stock Q Joined: Mar 2008 Posts: 883 Affton MO	Quote: I have a 440 W8 motor with a 1.80 glide 4.56 gear 29.5 11.5W tire I shift at 7800rpm. best 60ft is 1.29 with an avg 1.32 with a tight converter.going to a 4.88 gear this year. Best 1/8 mile is 5.79@ 120 at 3085 lbs. http://youtu.be/RTDkU8WCjLo This example shows how my engine in the Demon is head limited. The cars weigh within 5lbs of each other and mine only went 6.09 at 111mph versus 5.79 at 120 mph, however my 60 ft has been as quick as 1.261 and avg 1.29/1.30 if it don't trip the beams with the rear wheels. 3 speed trans in mine helps the 60ft a lot though. I watched the video also and nice job munching the chevy.

Re: Question for the 9 second small-block NA guys [Re: qwkmopardan] #1580288 02/18/14 10:29 AM 02/18/14 10:29 AM
Joined: Dec 2009 Posts: 20,640 in a cattle trailer down by th... G Guitar Jones Paddle faster! I hear banjo music!
Guitar Jones Paddle faster! I hear banjo music! G Joined: Dec 2009 Posts: 20,640 in a cattle trailer down by th...	I have an 8.75 rear and the only pro gear available is the 4.86 so that is what I run with a 14.5/32 tire on a 15" rim, traps about 7200. 2750 with me in it, 4 link rear the car would hook in a mud slide. "Follow me the wise man said, but he walked behind" '92 D250 Club Cab CTD, 47RH conversion, pump tweaks, injectors, rear disc and hydroboost conversion. '74 W200 Crew Cab 360, NV4500, D44, D60 and NP205 divorced transfer case. Rear disc and hydroboost conversion. 2019 1500 Long Horn Crew Cab 4WD, 5.7 Hemi.

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