Gear Selection

furr980 · 10-04-2007, 01:13 PM

this winter i plan to build a pure stock elinimator nova. i was woundering what gear ratios i should go with in the trans and rear? heres some info on my car. if you need more please ask.

engine-350 2 or 4 barrel; 390/410 195/202@050 800-4800
trans-350 turbo
rear-8.5 10-bolt
weight-3214 (thats shipping weight)
tires-28-29.5x9x15 bias ply or radial i dont know yet which is the best for my combination.

Daran Summerton · 10-04-2007, 01:20 PM

Is this a 69 or 70? It matters on the 2 Barrel combo - which is a good combo.
Gear as tight as you can unless your driving it in - then 4.11 is about max on the freeway.

Joe Marcinowski · 10-04-2007, 05:34 PM

You may want to check with IHRA on your cam specs. You may be pleasantly surprised by the duration numbers. I would also get the valve spring pressure from them as this was my limiting factor when I ran Pure Stock. When you get these figures, it will be easier to choose a convertor and gearing.
Good Luck,
Joe

furr980 · 10-10-2007, 06:04 PM

its a 73. i will ask for the spring numbers. im trying to find tranny gears and rear gears to run. i know they are out there, im just not sure as to which one. thanks for the help so far.

Michael Beard · 10-11-2007, 09:20 AM

I'm putting new 'shoes' on the car at Rockingham. Might not be a lot left on them, but you can try my 9x29.5 M/T radials then. Radials must certainly be the ticket for a Pure Stocker!

Joe Marcinowski · 10-13-2007, 12:01 PM

furr980,
Join this group, http://sports.groups.yahoo.com/group...OCKdragracing/. You'll get plenty of help from these guys. The 29.5 Mickey T radials were a .10 faster on my Pure Stocker in a back to back.
Later, Joe

Mark Lewis · 10-13-2007, 03:17 PM

I would put a 2.75 gear in the trans and a 4.88 in the rear running radials. You might want to check cam specs on the 73 and 74 . One had a optional calif cam with more duration,401/401 lift, if available I would use the 4bbl.

G Schenck · 10-13-2007, 03:31 PM

8.5 10 bolt >>>>>>>>>> you will be limited to a 4.11 I believe.

Greg

furr980 · 10-24-2007, 06:18 PM

thanks guys for all the great info. thnaks michael for the radials, ill defineatelt be testing with them. mark, where can i find that optional cam you were refering to.

greg fulk · 10-24-2007, 07:15 PM

the 74 is the one that has the 401 cam....also an 8.5 rearend will be fine in a pure stocker...you can get up to a 5.38 ring & pinion.....my cutlass has an 8.5 with a 5.13 gear & i've turned as good as 1.61 60's with it.

10-04-2007, 01:13 PM	#1
furr980 Junior Member Join Date: Dec 2006 Location: concord, nc Posts: 4 Likes: 0 Liked 0 Times in 0 Posts	Gear Selection this winter i plan to build a pure stock elinimator nova. i was woundering what gear ratios i should go with in the trans and rear? heres some info on my car. if you need more please ask. engine-350 2 or 4 barrel; 390/410 195/202@050 800-4800 trans-350 turbo rear-8.5 10-bolt weight-3214 (thats shipping weight) tires-28-29.5x9x15 bias ply or radial i dont know yet which is the best for my combination.

10-04-2007, 01:20 PM	#2
Daran Summerton Senior Member Join Date: Jun 2003 Location: Las Vegas nv Posts: 600 Likes: 18 Liked 66 Times in 37 Posts	Re: Gear Selection Is this a 69 or 70? It matters on the 2 Barrel combo - which is a good combo. Gear as tight as you can unless your driving it in - then 4.11 is about max on the freeway.

10-04-2007, 05:34 PM	#3
Joe Marcinowski Member Join Date: Nov 2005 Location: Northern Ohio Posts: 203 Likes: 852 Liked 33 Times in 15 Posts	Re: Gear Selection You may want to check with IHRA on your cam specs. You may be pleasantly surprised by the duration numbers. I would also get the valve spring pressure from them as this was my limiting factor when I ran Pure Stock. When you get these figures, it will be easier to choose a convertor and gearing. Good Luck, Joe __________________ Joe Marcinowski 3377 STK

10-10-2007, 06:04 PM	#4
furr980 Junior Member Join Date: Dec 2006 Location: concord, nc Posts: 4 Likes: 0 Liked 0 Times in 0 Posts	Re: Gear Selection its a 73. i will ask for the spring numbers. im trying to find tranny gears and rear gears to run. i know they are out there, im just not sure as to which one. thanks for the help so far.

10-11-2007, 09:20 AM	#5
Michael Beard VIP Member Join Date: Sep 2002 Location: Columbus, OH Posts: 4,060 Likes: 0 Liked 13 Times in 9 Posts	Re: Gear Selection I'm putting new 'shoes' on the car at Rockingham. Might not be a lot left on them, but you can try my 9x29.5 M/T radials then. Radials must certainly be the ticket for a Pure Stocker! __________________ Michael Beard - NHRA/IHRA 3216 S/SS

10-13-2007, 12:01 PM	#6
Joe Marcinowski Member Join Date: Nov 2005 Location: Northern Ohio Posts: 203 Likes: 852 Liked 33 Times in 15 Posts	Re: Gear Selection furr980, Join this group, http://sports.groups.yahoo.com/group...OCKdragracing/. You'll get plenty of help from these guys. The 29.5 Mickey T radials were a .10 faster on my Pure Stocker in a back to back. Later, Joe __________________ Joe Marcinowski 3377 STK

10-13-2007, 03:17 PM	#7
Mark Lewis Member Join Date: Apr 2006 Posts: 346 Likes: 63 Liked 207 Times in 44 Posts	Re: Gear Selection I would put a 2.75 gear in the trans and a 4.88 in the rear running radials. You might want to check cam specs on the 73 and 74 . One had a optional calif cam with more duration,401/401 lift, if available I would use the 4bbl.

10-13-2007, 03:31 PM	#8
G Schenck Senior Member Join Date: Mar 2007 Location: Harahan, La. Posts: 521 Likes: 41 Liked 81 Times in 35 Posts	Re: Gear Selection 8.5 10 bolt >>>>>>>>>> you will be limited to a 4.11 I believe. Greg

10-24-2007, 06:18 PM	#9
furr980 Junior Member Join Date: Dec 2006 Location: concord, nc Posts: 4 Likes: 0 Liked 0 Times in 0 Posts	Re: Gear Selection thanks guys for all the great info. thnaks michael for the radials, ill defineatelt be testing with them. mark, where can i find that optional cam you were refering to.

10-24-2007, 07:15 PM	#10
greg fulk VIP Member Join Date: Jan 2003 Location: jackson Posts: 1,165 Likes: 0 Liked 5 Times in 3 Posts	Re: Gear Selection the 74 is the one that has the 401 cam....also an 8.5 rearend will be fine in a pure stocker...you can get up to a 5.38 ring & pinion.....my cutlass has an 8.5 with a 5.13 gear & i've turned as good as 1.61 60's with it. __________________ Greg Fulk 308 308X P/SA "ALL AMERICAN"