Moparts
7.50's in the 1/8 with a 360
Posted By: MoparJoe
7.50's in the 1/8 with a 360 - 01/14/09 02:50 AM
I would like to get some input to see how far off this combo is. I want to run in the 7.50 class at my track, it's the slowest class I can get into where I don't have to wait in line for 2hrs with Rangers and civics to make a run.
The car is a 68 Dart, weight is around 3225# with me in it, it has 340 T bars and BBP discs up front,I'm planning on Cal Tracks & mono's out back with 235/60/15 M/T radials.
The motor I'm planning right now is a 360 with 308 heads, stock crank & rods KB 191 hypers with 11.2cc domes, Comp XE295 hyd 251/257@.050 .564/.564, crane 1.5 gold rockers, 308 heads cut for 2.02/1.60's bowls cleaned up and lightly ported, victor 340 manifold & 750 holley DP, 1 5/8" street headers & full 2 1/2" exhaust.
For a Trans I have a 904 & 998, I'll rebuild which one would work best for me and use a MVB and either a 9 1/2" or tight 8" converter. One thing I think will hurt it is that I want to run 3.55's, I live 60 miles from the track and had 3.91s with the same size tire in my last car and it was a bit much.
Thanks for any input - Joe
Posted By: Anonymous
Post deleted by Defbob - 01/14/09 03:02 AM
Posted By: tjmarcus1
Re: 7.50's in the 1/8 with a 360 - 01/14/09 03:08 AM
well.... let me see. that's impossible! it's gonna take a lot more gear. with a 3.55 it will still be in 2nd going thru. i know. that's the gear in my sons 72 dart that weighs 3426 with him in it.{you always have to include the driver's weight unless you can get the car to drive itself
} his car will run 7.40's with a 125 shot. high 8's on motor. you might want to use a 440 if you are determined to keep the 3.55.
Posted By: S/ST 3040
Re: 7.50's in the 1/8 with a 360 - 01/14/09 03:08 AM
The Victor is a good intake but, the RPM is a better choice for
you......and you can get by with a point less compression.
Posted By: MoparJoe
Re: 7.50's in the 1/8 with a 360 - 01/14/09 03:26 AM
If I have to run more gear I will, I'm just shooting to make enough torque in the 4-6,500 range to overcome the lack of gear.
My last car was a Duster that weighed 3300# with me in it and was running 8.60's@82 with a 318, KB 167s, XE 268 cam, stock 360 heads, M1, 600 holley, 998 with 175k converter, 3.91's & 26's, I'm trying to pick up 1.1 sec and 10mph over that combo.
Posted By: goldmember
Re: 7.50's in the 1/8 with a 360 - 01/14/09 03:41 AM
I've built several combos with less compression and camshaft that would do this easily. PM me if you'd like.
Posted By: Triple Threat
Re: 7.50's in the 1/8 with a 360 - 01/14/09 04:51 AM
My combo is
346 cid
9.5:1
230/230 480/480 hydraulic
box stock Eddies
stock rockers
Air gap
750 holley
1 5/8-1 3/4 TTI's
904
9.5" PTC 4600 flash
3.91's
235/60/15 ET street radial
My car has been 7.82 in the 1/8th
I have more head, gear and converter than you, but my car is overweight. You have more cam, more cubes and probably some other things I am too lazy to look back at. If you want to run a 7.50 index class the car needs to go 40's in the heat.
Posted By: 70AARcuda
Re: 7.50's in the 1/8 with a 360 - 01/14/09 05:47 AM
you might wanted run the low gear set with either trans...
2.74 and 1.54...and keep your 3.55
Posted By: 67valiant
Re: 7.50's in the 1/8 with a 360 - 01/14/09 05:56 AM
easy with what you got i have a 360 509 cam stock j heads small valves 750 carb 727 big stall 3800 lauch and 410 in the rear in a 67 valiant 3000 ish with me in it and i sun 7.45-7.5 all day long i think your there but i also run at sea level so that might help me too
Posted By: dart_73_br
Re: 7.50's in the 1/8 with a 360 - 01/14/09 05:38 PM
I´m finishing my setup...
318, xe284h, 11.5 CR on ethanol, fuel injected, 2.02 1.60 ported heads, roller rockers, forged pistons and rods, 3300lbs Dart, 3.73 gears, ladder bars, ceramic clutch, 11.5x26 street tires.
What could be improved in this combo? Gears?
How much should I expect on 1/8 time ?
Posted By: roadrunnerreds
Re: 7.50's in the 1/8 with a 360 - 01/15/09 02:53 AM
i am hoping for about the same ET or quicker for my 65 dart.It Is a 360 .040 over flat top probe pistons h beam rods 10.17-1 compression with eddy heads 63 cc.Crower solid lift cam 545 in lift 558 ex lift.air gap intake with holley 750 hp street carb.904 trany with 8 inch 4500 converter and dana 60 with 3.73 gears and 27 inch tall MT ET street tires.Has applied racing technology 32 inch ladder bars and QA-1 adjustable shocks on all four corners.it weighs 3255lbs with me in it. Brad
Posted By: dizuster
Re: 7.50's in the 1/8 with a 360 - 01/15/09 03:31 PM
I'd be very very impressed if you could get that combo to go 7.50's on a 355 gear.
I used to have a duster
346"
Fully ported 2.02 smog heads (flow 245~250cfm)
Solid roller 248/252@.050 .604/.613"
12.2:1 compression
1 3/4" headers
Ported Mopar M1 intake with worked 750DP
4500 9 1/2" converter
904 with low gear set
4.56 with 28 x 10.5 slicks
3300~3350lbs with driver.
The best that car ever went was 7.70's in the 1/8 and 11.85@ 116mph in the 1/4
Granted it was a 340 not a 360, but I had a lot more cam and gear to make that up with.
I agree a 4" crank would be your best bet to try and get there...
Posted By: aarcuda
Re: 7.50's in the 1/8 with a 360 - 01/15/09 04:14 PM
Quote:
I'd be very very impressed if you could get that combo to go 7.50's on a 355 gear.
I used to have a duster
346"
Fully ported 2.02 smog heads (flow 245~250cfm)
Solid roller 248/252@.050 .604/.613"
12.2:1 compression
1 3/4" headers
Ported Mopar M1 intake with worked 750DP
4500 9 1/2" converter
904 with low gear set
4.56 with 28 x 10.5 slicks
3300~3350lbs with driver.
The best that car ever went was 7.70's in the 1/8 and 11.85@ 116mph in the 1/4
Granted it was a 340 not a 360, but I had a lot more cam and gear to make that up with.
I agree a 4" crank would be your best bet to try and get there...
I agree.
My 416 has 9.7:1, with ported TA heads and six pack manifold, headers, cheetah VB, 3200 stall, 4.30s and stock weight and the best I could pull off was 8.01 in the 1/8th.
But I just started playing with it. it might have more but that we'll find out in the spring
Posted By: moparmanjames
Re: 7.50's in the 1/8 with a 360 - 01/15/09 04:25 PM
Throw some W2s or Indy's on it and you might be able to do it.
Posted By: aarcuda
Re: 7.50's in the 1/8 with a 360 - 01/15/09 06:12 PM
Quote:
Throw some W2s or Indy's on it and you might be able to do it.
the indys are on my list but at $3500 a set (for the offest TA style), they are on the waiting listing
Posted By: Dragula
Re: 7.50's in the 1/8 with a 360 - 01/15/09 07:22 PM
I ran 7.50's (1.60 60ft) in the 1/8th with a 9:1 340 and about the same combo except my heads were untouched.
'72 Cuda
340 +0.030" with Mopar purple 484 cam
TM5 Intake with 2" spacer
850DP carb deleted choke horn
1-5/8 Headers, open
904 low gear setted trans ( A must have)
8" super tight 4700 stall convertor
4.30:1 rear gears with standard posi
28x10 slicks
SS leaf springs (Would highly recomend caltracs & monos)
Things I would change on that combo:
-Caltracs & Monos
-QF 850 Annular DP carb
-Ported Air Gap as I run now with 1" open spacer
-4.10 gear & spool
-Eddy heads & stainless 1.6 rockers
Vid.....(the bug had a SBC with a super charger in it & my car mufflers on it)
http://s427.photobucket.com/albums/pp357/cudahalr/72Cuda340/?action=view¤t=72Cuda_1997.flv
Posted By: Jacob Pitt
Re: 7.50's in the 1/8 with a 360 - 01/15/09 07:27 PM
Man I don't know what I did right.
I built a .020 over 360 that runs on 93 octane pump gas in a full interior all steel Duster that my Mom races with me and it has run a 7.44 @ 91mph. It usually runs high 7.40's to low 7.50's. It's pretty simple combo.
Ported J heads, Airgap, 10.4to1, 4.30's, 904 low gear set, ATI 3000 stall, TTi headers, Lunati Voodoo flat tappet hydraulic, H/S 1.5's, 750 Holley, no belt driven accesseries. The secret is getting it to 60' and the rest is gravy. Good luck with your goals.
Posted By: Quicktree
Re: 7.50's in the 1/8 with a 360 - 01/15/09 08:06 PM
Quote:
I ran 7.50's (1.60 60ft) in the 1/8th with a 9:1 340 and about the same combo except my heads were untouched.
'72 Cuda
340 +0.030" with Mopar purple 484 cam
TM5 Intake with 2" spacer
850DP carb deleted choke horn
1-5/8 Headers, open
904 low gear setted trans ( A must have)
8" super tight 4700 stall convertor
4.30:1 rear gears with standard posi
28x10 slicks
SS leaf springs (Would highly recomend caltracs & monos)
Things I would change on that combo:
-Caltracs & Monos
-QF 850 Annular DP carb
-Ported Air Gap as I run now with 1" open spacer
-4.10 gear & spool
-Eddy heads & stainless 1.6 rockers
Vid.....(the bug had a SBC with a super charger in it & my car mufflers on it)
http://s427.photobucket.com/albums/pp357/cudahalr/72Cuda340/?action=view¤t=72Cuda_1997.flv
we did the same with a very mild 340. with a good converter a 360 should be a breeze.
Posted By: Triple Threat
Re: 7.50's in the 1/8 with a 360 - 01/15/09 08:39 PM
Seems like all the stock stroke small blocks that run well have low gear set 904's. Interesting.
Posted By: moparmanjames
Re: 7.50's in the 1/8 with a 360 - 01/15/09 10:10 PM
Quote:
Quote:
I ran 7.50's (1.60 60ft) in the 1/8th with a 9:1 340 and about the same combo except my heads were untouched.
'72 Cuda
340 +0.030" with Mopar purple 484 cam
TM5 Intake with 2" spacer
850DP carb deleted choke horn
1-5/8 Headers, open
904 low gear setted trans ( A must have)
8" super tight 4700 stall convertor
4.30:1 rear gears with standard posi
28x10 slicks
SS leaf springs (Would highly recomend caltracs & monos)
Things I would change on that combo:
-Caltracs & Monos
-QF 850 Annular DP carb
-Ported Air Gap as I run now with 1" open spacer
-4.10 gear & spool
-Eddy heads & stainless 1.6 rockers
Vid.....(the bug had a SBC with a super charger in it & my car mufflers on it)
http://s427.photobucket.com/albums/pp357/cudahalr/72Cuda340/?action=view¤t=72Cuda_1997.flv
we did the same with a very mild 340. with a good converter a 360 should be a breeze.
Yeah but he wants to use 3.55 gears and drive it to the track. I would think an overdrive tranny and a lockup converter and a great set of heads would be the ticket. It's a little tougher to do in a 3300# car with a smallblock.
Posted By: justinp61
Re: 7.50's in the 1/8 with a 360 - 01/16/09 01:47 AM
My street/strip Dart is 3300#, pump 93, stock stroke .030 340, 11.2-1, ported Edelbrocks, Hughes 237/242 @ .050 .584/.592 hydraulic flat tappet, 1.6 rockers, Quick Fuel Q-750, Weiand X-Cellerator, 727 with a 9.5" 4400 converter, 8 3/4 with 4.30 gears, Cal-Tracs and monos. It has ran 7.24 @ 95.04 in the 1/8 with a 1.533 60' and will run 7.30s in the heat. The car has full interior (Kirkey seats) heater, wipers, it even still has the map and trunk lights.
Posted By: Dragula
Re: 7.50's in the 1/8 with a 360 - 01/16/09 04:11 AM
I drive on 4.56's right now to the track.....But I did put OD in it. In fact, I drive it when ever, and where ever possible. I just don't have an ET on it yet. Popped a freeze plug on the way to the track the last time...You really don't want to race a vehicle with 4.56's, all you'll get to see are the tail lights....
Posted By: DusterKrazy
Re: 7.50's in the 1/8 with a 360 - 01/16/09 04:30 AM
Quote:
you have almost same set up as i do but i'm running a 318 in a 67 dart post. same heads but i have no port work. you have a larger cam and better intake. i'm running a RPM and flat tops i run pump 93. i do run 4.10s and a spool with SS spring's but i got 29.5 M/Ts. so the RPMs aren't that bad. i'm running 7.70s. your's should be quite a bit quicker.
Can you tell me more about this 318? Like what carb and pistons and compression? Any other details?Camshaft?
Posted By: DJVCuda
Re: 7.50's in the 1/8 with a 360 - 01/16/09 02:48 PM
I've ran a 7.95 @ 85 with 3.23 gears
stock 360
small valve heads
mopar .474 cam
eddy street ram
2 holley 390 cfm carbs
dynamic 3800 9.5" converter
low gear 904
24.5x8.5 MT slick
I dont see the need for expensive parts, even with 3.55's to attain your goal.
Posted By: Valiant_Showoff
Re: 7.50's in the 1/8 with a 360 - 01/16/09 03:53 PM
Quote:
Man I don't know what I did right.
I built a .020 over 360 that runs on 93 octane pump gas in a full interior all steel Duster that my Mom races with me and it has run a 7.44 @ 91mph. It usually runs high 7.40's to low 7.50's. It's pretty simple combo.
Ported J heads, Airgap, 10.4to1, 4.30's, 904 low gear set, ATI 3000 stall, TTi headers, Lunati Voodoo flat tappet hydraulic, H/S 1.5's, 750 Holley, no belt driven accesseries. The secret is getting it to 60' and the rest is gravy. Good luck with your goals.
Where you race has a lot to do with it too. I assume you're running near sea level based on your Texas location. Climb a couple thousand feet and head inland where the air sucks and your time could drop by a 1/2 second.
Posted By: Evil Spirit
Re: 7.50's in the 1/8 with a 360 - 01/16/09 05:33 PM
IMO, the Eddy Air Gap would be a better intake for you, and I would use a low gearset in the trans if you have the choice. With that short tire, the 3.55 should be plenty of gear. Again IMO I'd try to get more tire (taller) for more bite, then see if you need more gear.