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  #16 (permalink)  
Old 10-13-2012, 10:48 PM
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they do the lt1 cam swap all the time in thes motors which is
DURATION 211 220
LIFT (1.5)492 .492
LIFT (1.6)525 .525

and the zz4 cam is
Duration 208/221
Lift .474 .510"

which means the zz4 cam is smaller thin the lt1 cam that is done all the time on tbi cars with none of the mods you keep saying.

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  #17 (permalink)  
Old 10-13-2012, 11:11 PM
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Quote:
Originally Posted by mafiacustomz View Post
they do the lt1 cam swap all the time in thes motors which is
DURATION 211 220
LIFT (1.5)492 .492
LIFT (1.6)525 .525

and the zz4 cam is
Duration 208/221
Lift .474 .510"

which means the zz4 cam is smaller thin the lt1 cam that is done all the time on tbi cars with none of the mods you keep saying.
The LT1 cam has much wider LSA and less valve overlap.

This is the LT4 cam
Camshaft Specs (12551705): 205/207 duration @ 50*, .447/.459″ lift, 117 Lobe Seperation Angle

Here are the Lt1 cams specs
Factory Camshaft Specifications:
1992 Y-body: 205/207 0.451/0.450 lift 117 LSA
1993-1995 Y-body, F-body: 202/207 0.450/0.460 lift 116 LSA
1994-1996 B-bodies (including L99 4.3L): 191/196 0.418/0.430 lift 111 LSA
1996 Y-body, 1996-1997 F-body: 200/207 0.447/0.459 lift 117 LSA
1996 Y-body, F-body LT4: 203/210 0.476/0.479 lift 115 LSA

here are a few more and some popular swap cams
Camshaft Article - ThirdGen.org

I think you are confusing with the LT4 hot cam
218-228 112 .492" lift with 1.5 rockers and .525" lift with 1.6's
Definalty needs a converter and gears and compression in a 305.
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Old 10-13-2012, 11:27 PM
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The special 305HO th2004r converter bolts right in a th700r4 (late 30spline)
Its a bolt in. If you can find it.
None of these cams work with a low stall and no gears on a 305.
The Lt1 and Lt4 had 10:1 and 10.4:1 compression

Find the cam from a 96 -2000 L31 5-7l vortec motor
96 to 2000 5.7liter truck motor and bolt it in.
Also used in the 383HT and 350 Ramjet crate motors.
High lift fast rate of lift short duration a improvement on the cam you got.
good torque in a 305.

factory cam specs
Part Number Type DUR @ .050" Lift C/R LSA Usage
14093643 Hyd. Roller 202/206 .403"/.415" 8.5:1 115 '87 350 Corvette and IROC Camaro
10134334 Hyd. Roller 235/235 .480"/.480" 9.0:1 114 350 ZZZ through ZZ2 crate motors
10185071 Hyd. Roller 208/221 .474"/.474" 9.8:1 112 350/345 ZZ3 & ZZ4 crate motor
10224241 Hyd. Roller - - - - '92 to'94 Gen. 11 LT1 350
10243779 Hyd. Roller - - - - '94 to '96 Gen. II L99 265 V-8
12370845 Hyd. Roller 214/224 .488"/.509" - 112 Off-road use, lobe for mech. fuel pump
12370846 Hyd. Roller 222/230 .509"/.528" - 112 Off-road use, lobe for mech. fuel pump
12370847 Hyd. Roller 232/242 .539"/.558" - 112 Off-road use, lobe for mech. fuel pump
125517051 Hyd. Roller 201/208 .447"/.459" 10.4:1 112 '95 to '96 Gen. 11 LT1 350, w/center dowel pin
12551142 Hyd. Roller 203/210 .476"/.480" 10.8:1 115.5 '96 350 LT4 w/1.6:1 roller rockers
24502586 Hyd. Roller 218/228 .525"/.525" 10.8:1 - '96 LT4 H.O.T crate motor cam, use
- - - - - - w/1.6:1 roller rockers.
N/A Hyd. Roller 202/210 .472"/.478" 10.0:1 11 '97 Gen. III LS1 Corvette 350, uses 1.7
- - - - - - roller rockers and Gen. III
- - - - - - tapered valve spring
24502476 Hyd. 212/220 .435"/.460" 9.1:1 112.5 350/300 CC crate motor
14088843 Hyd. 202/206 .403"/.415" 8.5:1 115 '83 to'86 305HO
12364050
3863151 Hyd. 221/221 .447"/.447" 11.0:1 114 327/350HP L-79
12364051
3896929 Hyd. 195/202 .390"/.410" 8.0:1 112 327/300HP
3896962 Hyd. 222/222 .450"/.460" 8.5:1 114 350 L-46, L-82
12353915 Hyd. 194/204 .401"/.423" 8.0:1 104 GM/Crane street
12353914 Hyd. 180/194 .378"/.401" 8.0:1 - GM/Crane very high, low-speed torque
12353923 Hyd. 224/234 .465"/.448" 9.5:1 114 GM/Crane off-road
12353918 Hyd. 214/224 .442"/.465" 8.75:1 112 GM/Crane marine & off-road
12353917 Hyd. 204/214 .420"/.442" 9.0:1 112 GM/Crane non-emissions vehicles & off-road
12353916 Hyd. 204/214 .423"/.446" 8.5:1 110 GM/Crane 50 state legal 305-350
12364052
3849346 Mech. 254/254 .485"/.485" 11.0:1 114 327/365HP & Z-28 302
12364053
3927140 Mech. 257/269 .493"/.512" 12.0:1 112 Off-road
12364054
3972178
3972182 Mech. 242/254 .459"/.485" 11.0:1 116 '70 LT1 360 to 370HP
" " " " 9.0:1 116 71 LT1 330HP
3965724 Mech. 262/273 .488"/.509" 12.5:1 112 2nd design, short track, road race

Key to table:
DUR = Duration, C/R = Compression ratio of engine used in (stock), LSA = Lobe Separation Angle.
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Old 10-13-2012, 11:53 PM
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Lt1 cam
Camshaft Specs (12551705): 205/207 duration @ 50*, .447/.459" lift, 117 Lobe Seperation Angle
This is the LT1 cam from the corvette with manual transmission.
The Camaro LT1 and impala/caprice LT1 got a different milder cam
3 different cams in the LT-1 motor depending on the car and trans used.
These 5.7 liter 10:1cr+++ high perf corvette Lt1 motors got a special high stall 2200stall converter.
and gears
That converter stalls about 1600 behind a lil 305.
not enough stall .

Go out in the driveway and stall test your converter against the brake.
I bet it cannot get past 1500rpm.
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Old 10-14-2012, 12:02 AM
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well i dont have a rpm gauge but it will spin all day long but here is what i want to know will this cam work in my car run and drive with the computer.

Yes or No
Buy or Dont buy
better thin stock/wont do anything to the 305

Dont give me a parts list.
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  #21 (permalink)  
Old 10-14-2012, 12:47 AM
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For $40 , a bunch of time/work and gaskets you can find out for yourself.

They say you learn best from your mistakes.

Too much overlap. likely idle and drivability problems without tuning modifications
etc which you won;t do even if you knew how to.
a real dog with stock converter a stock gears (2.561 and a heavy car and a stock 305.
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Old 10-14-2012, 12:01 PM
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So what will it do to my car no gains in hp or sound and no power at the wheels.

On the other hand i will get alot better sound some power and more hp.

Its not making any sence to me how a bigger cam with 3 different seperation angle is going to make that much of a difference.

Yes i will need to add more fuel which a 350 chip will give easy but it will run and sound better thin befor.
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  #23 (permalink)  
Old 10-14-2012, 12:13 PM
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For $40 you can find out for yourself.
Stick it in and come back and tell me I'm all wrong.

Can work real well with then right combo and tuning changes.
if you want a rough racey thumpr idle It won;t happen with this cam.
But probabily will need tuning changes timing fuel curve and a looser converter stall
and definaly will want gears.

This cam is not the same or close to a factory LT1 or even th LT4 cam.
These cams had shorter duration and less valve overlap.
Even these used a high stall gears 10;1+cr and or a manual transmission.
This has a big effect on the idle and low end engine torque.
Idle stability in gear with low stall (stock) converter.
especially critical with TBI EFI. Cams really mess with the TBI.

wider 116+LSA ='s less valve open overlap nicer idle
narrower 112LSA ='s more valve open overlap degraded idle quality and low rpm performance.

the ZZ4 with narrower LSA combined withe more intake and exhaust duration has a lot more valve overlap than
any of the LT-1 LT4 cams shorter duration and wider LSA's ='s less valve open overlap.

some people learn best by mistakes.

The 305 TBI motor is optimized for low rpm runing. with small cam and swirl port heads low compression.
low gears 2.56:1 low rpm running in OD for fuel efficiently.

Last edited by F-BIRD'88; 10-14-2012 at 12:21 PM.
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Old 10-14-2012, 12:41 PM
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You can build a very good high perf 305 HO around this ZZ4 cam.
Look at the ZZ4 350 crate motors specs for inspiration.
10:1 compression high flow aluminum heads with unrestricted ports , high flow intake 750carb
high flow exhaust (headers)
2500+stall 3.73+gears. 2500-5700rpm. 355HP lots of torque in the mid range.

The smaller cid 305 will want even more stall and gears as rpm range will be higher than on the 350.
engine compression ratio is critical. rougher idle with less idle manifold vacuum than in a 350.

shaved down L-31 "062" vortec heads work real good on 305's (10:1+cr) with that ZZ4 cam 3000 stall (monte carlo SS converter) and 4.10's. th700r4
large BBC TBI throttle body on a rpm style vortec intake, headers custom EFI tune.
or with the Chevy Ramjet EFI system.
That would be cool , go like hell and be something to look at under the hood at a car show.

Good luck to you.

Last edited by F-BIRD'88; 10-14-2012 at 12:50 PM.
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Old 10-14-2012, 02:59 PM
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ok so is the zz4 cam worth $40 should i buy it and resell it and get a lt1 or lt4 camshaft.
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Old 10-14-2012, 04:41 PM
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i would also like to add the guy said the cam came out of a 80's camaro with the tpi 350 that is a zz4 right?
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Old 10-14-2012, 05:08 PM
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F-BIRD'88, you have way more patience than I do.
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Old 10-14-2012, 06:21 PM
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Quote:
Originally Posted by mafiacustomz View Post
i would also like to add the guy said the cam came out of a 80's camaro with the tpi 350 that is a zz4 right?
No its not at all.

There are two or three different cams that were used in those L98 TPI motors.
The manual trans cars corvette Iroc camaro got a bigger cam than the autos.
The bigger version TPI cams came in car with stiff rear gears. 3.73 and a special converter.
There was a baby TPI cam used in auto 305 TPI motors too.

They are not all the same.

Your 2.56:1 geared car with low stall converter is going to hate these cams
without mods and tuning.

You;d best keep your $40 until you figure out exactly what is being offered.
ThirdGen.org
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Old 10-14-2012, 06:23 PM
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The ZZ4 cam only came in the 350 ZZ4 crate motor.
or bought as a GMPP performance cam.
Never used OEM in any car.
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Old 10-14-2012, 06:28 PM
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ok ill get the numbers off the cam and find what it is and get back to you.
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