how much Hp?

greg fulk · 02-03-2010, 02:27 AM

Hello guys...I have a buddy @ work that has a 69 Fairlane 500 with a 428Cj his ? is how much Hp dose he need to run S/ST? We are redoing the engine this winter & it's now time to buy a cam. Here's what he has 428Cj flat-top engine good set of heads Victor intake 850 Holley C6 with a pro-tree brake 8" TCI converter 5.14 (or 4.56) gear 31x10.5 W slicks with a ladder bar set-up. The car is around 3200-3300 with him in it (he's 140lbs). Thanks for any input

SCOTT SST2871 · 02-03-2010, 08:04 AM

I would think with a 3300 lb car you would need 500 hp minimum,which should be fairly easy with that combo
scott fifield

Bob Verwold · 02-03-2010, 08:43 AM

I'm running 600 hp and one of the slowest in the field (carrying 3020lbs). if that helps ?

greg fulk · 02-03-2010, 01:26 PM

Thanks guys! He's not worried about a lot of mph right now just wanting to get it to run like 10.70's so he can try this & see if he likes it.

Floyd Staggs · 02-03-2010, 03:45 PM

I've got 700+ and all I get is 10.70 @ 122 @ 4000 lbs.

Bob Verwold · 02-03-2010, 04:12 PM

Quote:

Originally Posted by greg fulk

Thanks guys! He's not worried about a lot of mph right now just wanting to get it to run like 10.70's so he can try this & see if he likes it.

This he wouldn't be you getting tired of all the stock BS would it ?.....

greg fulk · 02-05-2010, 02:23 AM

No I do have a buddy @ work with a 69 Fairlane 500 that wants (or thinks he wants) to go S/ST racing....That being said if I sell the Cutlass I think I just my start building a S/ST car...that Super Series @ Trails looks REAL good to me!

Bill Baer · 02-05-2010, 01:42 PM

Well here' the math:
ET from HP (1/4 mile) = (WEIGHT / HP)^.333 * 5.825
(note the little ^ symbol indicate an exponet i.e you need to take the value to that power)
Keep in mind that this is rear wheel HP not flywheel HP as measured on a Dyno. if your running a torque converter you will lose ~ 8-10%
So if you calculate (3300# /563HP)^.333 X 5.825= 10.50ET but thats rear wheel HP
so you need another 8% to at the flywheel or 563(HP) x 1.08 =~608HP to run 10.50
10.90 calcs out to 544HP but that would leave you no room to account for bad air,bad tracks etc.

Try this web site for more racer math
www.freewebs.com/soslo/formulas.htm#hp_from_et
Hope this helps!

SSTRACER323 · 02-05-2010, 05:40 PM

?????????

Baer,

When we dyno'd my motor at Troys it showed 496 on the dyno.

My car weighted 3020 with me and i went 10.25 @ 131.00 on good day
very bad day i would go 10.42 @129.00.

600 hp in my car and it would fly, even with my big *** in it.....

astikhossw · 02-06-2010, 09:43 AM

How about finding yourself one of the ford svo v-6 engines and run s/st at 2000 lbs. and 550 hp easy with a really conservative camshaft,should run deep in the nine's at over 135,thats how i an doing it.

02-03-2010, 02:27 AM	#1
greg fulk VIP Member Join Date: Jan 2003 Location: jackson Posts: 1,165 Likes: 0 Liked 5 Times in 3 Posts	how much Hp? Hello guys...I have a buddy @ work that has a 69 Fairlane 500 with a 428Cj his ? is how much Hp dose he need to run S/ST? We are redoing the engine this winter & it's now time to buy a cam. Here's what he has 428Cj flat-top engine good set of heads Victor intake 850 Holley C6 with a pro-tree brake 8" TCI converter 5.14 (or 4.56) gear 31x10.5 W slicks with a ladder bar set-up. The car is around 3200-3300 with him in it (he's 140lbs). Thanks for any input __________________ Greg Fulk 308 308X P/SA "ALL AMERICAN"

02-03-2010, 08:04 AM	#2
SCOTT SST2871 Member Join Date: Oct 2008 Location: PORT ST JOHN FLORIDA Posts: 226 Likes: 0 Liked 0 Times in 0 Posts	Re: how much Hp? I would think with a 3300 lb car you would need 500 hp minimum,which should be fairly easy with that combo scott fifield

02-03-2010, 08:43 AM	#3
Bob Verwold Senior Member Join Date: Jul 2007 Location: Fayetteville Ohio Posts: 656 Likes: 0 Liked 0 Times in 0 Posts	Re: how much Hp? I'm running 600 hp and one of the slowest in the field (carrying 3020lbs). if that helps ?

02-03-2010, 01:26 PM	#4
greg fulk VIP Member Join Date: Jan 2003 Location: jackson Posts: 1,165 Likes: 0 Liked 5 Times in 3 Posts	Re: how much Hp? Thanks guys! He's not worried about a lot of mph right now just wanting to get it to run like 10.70's so he can try this & see if he likes it. __________________ Greg Fulk 308 308X P/SA "ALL AMERICAN"

02-03-2010, 03:45 PM	#5
Floyd Staggs VIP Member Join Date: Feb 2006 Location: Cucamonga, CA Posts: 1,521 Likes: 138 Liked 223 Times in 98 Posts	Re: how much Hp? I've got 700+ and all I get is 10.70 @ 122 @ 4000 lbs. __________________ Floyd Staggs 787 SST

02-05-2010, 02:23 AM	#7
greg fulk VIP Member Join Date: Jan 2003 Location: jackson Posts: 1,165 Likes: 0 Liked 5 Times in 3 Posts	Re: how much Hp? No I do have a buddy @ work with a 69 Fairlane 500 that wants (or thinks he wants) to go S/ST racing....That being said if I sell the Cutlass I think I just my start building a S/ST car...that Super Series @ Trails looks REAL good to me! __________________ Greg Fulk 308 308X P/SA "ALL AMERICAN"

02-05-2010, 01:42 PM	#8
Bill Baer Senior Member Join Date: Jul 2007 Location: Nothern IL Posts: 596 Likes: 1 Liked 1 Time in 1 Post	Re: how much Hp? Well here' the math: ET from HP (1/4 mile) = (WEIGHT / HP)^.333 * 5.825 (note the little ^ symbol indicate an exponet i.e you need to take the value to that power) Keep in mind that this is rear wheel HP not flywheel HP as measured on a Dyno. if your running a torque converter you will lose ~ 8-10% So if you calculate (3300# /563HP)^.333 X 5.825= 10.50ET but thats rear wheel HP so you need another 8% to at the flywheel or 563(HP) x 1.08 =~608HP to run 10.50 10.90 calcs out to 544HP but that would leave you no room to account for bad air,bad tracks etc. Try this web site for more racer math www.freewebs.com/soslo/formulas.htm#hp_from_et Hope this helps! __________________ Bill Baer 3391 SC, 339B SC, QR Last edited by Bill Baer; 02-05-2010 at 01:55 PM.

02-05-2010, 05:40 PM	#9
SSTRACER323 Senior Member Join Date: Jul 2006 Location: Coal City, IL. Posts: 775 Likes: 3 Liked 1 Time in 1 Post	Re: how much Hp? ????????? Baer, When we dyno'd my motor at Troys it showed 496 on the dyno. My car weighted 3020 with me and i went 10.25 @ 131.00 on good day very bad day i would go 10.42 @129.00. 600 hp in my car and it would fly, even with my big * in it..... __________________ The Doughboy** Lee Lones S/ST 323L

02-06-2010, 09:43 AM	#10
astikhossw Member Join Date: Jul 2008 Location: moreno valley Ca Posts: 266 Likes: 2 Liked 20 Times in 9 Posts	Re: how much Hp? How about finding yourself one of the ford svo v-6 engines and run s/st at 2000 lbs. and 550 hp easy with a really conservative camshaft,should run deep in the nine's at over 135,thats how i an doing it.