will this get me in the 12s?
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Car: 1991 Z-28
Engine: 383 TPI
Transmission: 700R4
Axle/Gears: 2.73
will this get me in the 12s?
Car is a 91 Z28. auto. 2.73 rear. I like the 2.73 (I take the car on a lot of road trips)
383 with AFR 195cc heads . Compression should be about 10:1. I am ordering the cam now. Looks like it will be a TPiS zz-9 with comp pro magnum roller rockers. Unless I can find a TPiS big mouth intake and runners I will have the stock intake extrude honed and polished. Car will likely have Dyno Don headers and a single 3" cat back. No stall on the converter. Think it will get in the 12's?
383 with AFR 195cc heads . Compression should be about 10:1. I am ordering the cam now. Looks like it will be a TPiS zz-9 with comp pro magnum roller rockers. Unless I can find a TPiS big mouth intake and runners I will have the stock intake extrude honed and polished. Car will likely have Dyno Don headers and a single 3" cat back. No stall on the converter. Think it will get in the 12's?
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Car: 1991 Z-28
Engine: 383 TPI
Transmission: 700R4
Axle/Gears: 2.73
Re: will this get me in the 12s?
ok. is there another cam that would get me there or is a stall conv
the only way?
the only way?
#5
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Re: will this get me in the 12s?
12's is hard if naturally aspirated. It takes cam,heads and different intake, converter and gears. Unless you use a sc or nitrous
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Re: will this get me in the 12s?
Originally Posted by 91 zeee
ok. is there another cam that would get me there or is a stall conv the only way?
Try though, see what happens...
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Car: 1991 Z-28
Engine: 383 TPI
Transmission: 700R4
Axle/Gears: 2.73
Re: will this get me in the 12s?
ok, we will see and if its a no go... then onto a stall conv and gears if needed.....
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Car: '86 Bird, 96 ImpalaSS, 98 C1500XCab
Engine: LG4, LT1, L31
Transmission: 700R4, 4L60E, 4L60E
Axle/Gears: 3.73 Tors, 4.88 spool, 3.73 Eaton
Re: will this get me in the 12s?
If you're intent on sticking with those gears, I wouldn't even be thinking about the 12's or any ET goal. That engine/heads with something like a Comp XE 218/224 on a 110 or 112 LSA would be a strong cruiser with that stock TC and gears.
Sure you could step up the TC and get a 12-sec timeslip, but without a gearing change to go with it, it will be annoying at every takeoff where you don't feel like blasting it.
The most I would do with those 2.73 gears is something like an S-10 TC. It would flash to 2500+ behind that 383 and still drive very near stock.
If you really want to take advantage of those heads, valvetrain, and exhaust that you're investing in, and still keep it mild, then consider a Yank SS3200 TC, 3.42 gears, and an XE 230/236 cam (that is, IF you get the different intake; for stockish intake, stick to the 218/224 cam).
StreetLethal, think about that comment above. For the equivalent of better gear reduction, he would want a shorter tire, not taller
Sure you could step up the TC and get a 12-sec timeslip, but without a gearing change to go with it, it will be annoying at every takeoff where you don't feel like blasting it.
The most I would do with those 2.73 gears is something like an S-10 TC. It would flash to 2500+ behind that 383 and still drive very near stock.
If you really want to take advantage of those heads, valvetrain, and exhaust that you're investing in, and still keep it mild, then consider a Yank SS3200 TC, 3.42 gears, and an XE 230/236 cam (that is, IF you get the different intake; for stockish intake, stick to the 218/224 cam).
StreetLethal, think about that comment above. For the equivalent of better gear reduction, he would want a shorter tire, not taller
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Car: 1982 Chevy Camaro Z28
Engine: LG4 (Carbed 305)
Transmission: T10 (4-speed stick)
Axle/Gears: Salvage yard rear
Re: will this get me in the 12s?
I see snapped rods, blown trans or shredded U-joint in the future if engine is beefed up and those 273 gears are kept. Too much strain on everything
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Car: 1991 Z-28
Engine: 383 TPI
Transmission: 700R4
Axle/Gears: 2.73
Re: will this get me in the 12s?
I agree with pretty much everything that's been said. I guess in the end, I would need a different cam for a 2.73 rear v. a 3.42?
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Car: 92 camaro/99 gmc Z71
Engine: 357/5.3
Transmission: built 700r4 4500 stall/4l60
Axle/Gears: 4.56/?
Re: will this get me in the 12s?
3.42 is better but your still gonna need a 3000+ stall to take full advantage of that cam.
#13
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Re: will this get me in the 12s?
12's in any "stock" car is hard especially with gears in the 2's. Gears & the converter will get you there the easiest. If it were me, I would find a 3:45 or 3:42 9 bolt that you could pick up for $300 and just swap it in - keep your 2 series rear for all around driving. Like others have said a 3000 stall will help too - I would do those & see where you are before I opened up the engine and started buying expensive head/cam & other parts. Practice makes perfect too - work on your launch - small gains in your 60 will be big gains at the end of the track!
#14
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Re: will this get me in the 12s?
When I was still running my long-runner TPI I found that it made gobs and gobs of torque at the line. Hooking up might be your biggest problem. You're going to want some good tires if you want to take advantage of that torque. I'd look at some drag radials if you plan to also drive it on the street. If you're still spinning look at suspension mods, and the gear/converter change. I'd also suggest looking at the DIY PROM board for help with the tuning aspect.
If the weather is just right, I think you'll dip into the high 12's.
If the weather is just right, I think you'll dip into the high 12's.
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