.030 460 with SRP lightweight flat tops .005 out of the bore,Truck rods with arp bolts. Comp mechanical flat tappet 310 B-8 drag race cam(310/[email protected] .656 .641)Ported D20E-AB heads with 2.30in 1.76ex valves milled to 85cc. Crane gold Race Rocker arms. Weiand Hi-Ram Tunnel Ram with 2 Holley 600 carbs. Does this sound like a good combination or would you change something. This is going into an 85 mustang coupe with M/T 28x10.5 tires 4.10 gears Auburn Pro Locker and 31 spline C-Clip elim. Axles. Comp.prepped C-4 with trans-brake with a TCI 3500 Super Street Fighter Converter. Car should weigh @ 3000lbs with driver. Any guesses on 1/4 mile times. By the way kick azz site. Lots of info. from people who truly sound like they know whats going on. :twisted:
What do you think of this combo
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I'm not sure if you have the PI head, or the one year only head that most folks would use for a boat anchor, but everything else sounds pretty good. My engine is a lot like yours except for CJ heads. I picked up a wack of power going from 650 DP Holley's to 750 DP's. Like about 3 tenths and 5 mph. Don't beat on the stock rods too hard - they like to break in the middle if you push them too hard. For the price of H-beams nowadays, I sure would think about putting some in the next time you have it apart. The converter stall might be a little low for a cam that size. My cam is smaller than yours, and I stall at 5200 rpm. That's where the converter guys told me my motor made maximum torque. Except for the heads, it sounds like it should go into the 10's quite easily. And like I said, I'm not sure which heads you have - I can't remember the part # of them. Consider this a bump if nothing else... 
I think you need a lot more carb, at least 850's. 600 is certainly to small, the 750 might get by. I think more stall would be better but I think you will do alright.
Actual duration vs. advertised would help on deciding the power/quarter mile times.
Actual duration vs. advertised would help on deciding the power/quarter mile times.
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D20E-AB are PI heads. N/M
N/M
N/M
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I would'nt use an intake valve any larger than 2.25. Do some exhaust port work and use at least a 1.76 exhaust valve; maybe a 1.8 if it'll fit. Same as everyone else said on converter and carbs.
Sheldon G.
Sheldon G.
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You sure those cam duration numbers are at .050? Sounds like maybe advertised duration to me. And yes those are the Police heads, sounds nice to me.
I should have looked, that cam is in my software. Did you buy the cam yet? If not go for a custom grind instead, way better and little more cost.
Assuming the heads are ported good:
You need an 850 cfm carb minimum with that combo. I would buy a Victor and one 850-950cfm carb. That would give you roughly 609hp and 561 ft/lbs. of torque. (1" spacer on intake) That equals roughly [email protected] in the quarter. Gears should be dead on or near it. You may be a couple of hundred pounds lighter than that.
I suggest that you consider changing to an aftermarket rod, check AD Performance.
Assuming the heads are ported good:
You need an 850 cfm carb minimum with that combo. I would buy a Victor and one 850-950cfm carb. That would give you roughly 609hp and 561 ft/lbs. of torque. (1" spacer on intake) That equals roughly [email protected] in the quarter. Gears should be dead on or near it. You may be a couple of hundred pounds lighter than that.
I suggest that you consider changing to an aftermarket rod, check AD Performance.
I had a similar set-up that we ran in a 688 AMX about 15 years ago. The only differences were 660's on t/ram, 266/276 @ 050 cam, and home-ported DOVE's. Stock truck rods, flattops, C-4 trans w 4800 stall.
It ran 10:60's @ 128, but I had too much gear (4:56) and would trap out around 6900RPM.
So, IMO you should be able to run mid 10's easy with that set-up.
It ran 10:60's @ 128, but I had too much gear (4:56) and would trap out around 6900RPM.
So, IMO you should be able to run mid 10's easy with that set-up.
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I have that cam in my 85 GT. Weighs 3238, 466 TFS CJ heads, Victor, 1250 dominator, 13.0 comp., 28*10.5 ET Streets, 2 speed, 8.8 with 4.3 for N/A, 3.73's for running the fogger. Best times so far are a 6.48 @108.7 N/A (~1600 FT) and 9.60'[email protected] on the fogger on a super easy off idle pass. I have a Dynamic 3600 conv. for the NOS and a 5700 ATI for N/A.
Personally I would get a different convertor and rods (cheap insurance). You should be good with the 4.10's. As for the cam I would go with a custom one instead also. This cam isn't bad, however I think a different profile would work better overall. I would go slightly smaller on the duration for a 460 and favor the Exhaust more with a 110 LS, especially if you stick with the stock rods. I normally shift at 7150 but it is still pulling very strong at 7400 I just don't want to go that high. I have found for every 100 RPM's above 7000 my car is still gaining a hundreth in the eight. Sorry I haven't dynoed my combo but I'm guessing its making 670 to 680 N/A going by my MPH and weight.
Personally I would get a different convertor and rods (cheap insurance). You should be good with the 4.10's. As for the cam I would go with a custom one instead also. This cam isn't bad, however I think a different profile would work better overall. I would go slightly smaller on the duration for a 460 and favor the Exhaust more with a 110 LS, especially if you stick with the stock rods. I normally shift at 7150 but it is still pulling very strong at 7400 I just don't want to go that high. I have found for every 100 RPM's above 7000 my car is still gaining a hundreth in the eight. Sorry I haven't dynoed my combo but I'm guessing its making 670 to 680 N/A going by my MPH and weight.
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