i'm planning on building a 350 for my 84Z28 and was wondering what you guys have done and what results you got. thx

 

in the sig...

here's the dyno chart as well-

 

See sig, very tame motor. Next step will be to replace
World heads with 180cc Pro Toplines.....

 

most in the sig, a 383 is a 350

 

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See sig for engine details. Desktop dyno ran it for 435 HP and 440 TQ, and i'm running it on an ENGINE (not car) dyno either friday, or mon-tues of next week, so i'll post up the results.

 

Stock. For now.

 

Impressive numbers.

May I ask...

Why did the dyno test start at 4000 RPM? I would have liked to see the low torque of that motor. I'll bet it would would be great with that Victor Jr.

 

nice engines.

84305HO, thats the same cam i'm planning on using but i'l be using 041 heads. it should get me in the 13s or close to it once i get some suspention and rear end work done for traction. what horsepower do you think you'l be at with the pro toplines?

 

we didn't want to bog it down too hard on the dyno... just was the rpm we started at... we probably made about 20 pulls?

on one of the first pulls we started it at about 2000, and it was pulling about 280ftlbs... around 3200, it jumps righ tup to 350...... and goes up from there...
and that was untuned... not too shabby

i'm right now investigating a cam change... not sure where to go with it tho...

Steve

 

Viper, calculating from trap speed and weight I should be 340-
350 hp with the present setup. With the Pro Toplines I would
like to make 370 - 380 hp.

 

1968 1 pc rear seal 4 bolt 5.7 liter block.
stock crank and rods. Cast pistons .040" overbore
cam is 282/292 with .465/.488" lift
305 heads, Corvette L98 intake
SLP Runners all siamese port polished
No timeslips to date

 

Specs in sig. 517 hp pulls 500+hp 6000-7200rpm over 450lbs of torque on 91 octane pump gas and no gas additive or external boost of any kind. Have'nt raced it YET! :lala: :lala: :lala:

 

Here is a friends 350 combo that uses the 041 heads.
ran strong 12 sec times in a heavier 2 gen Camaro.

350+.030 2bolt block
350+.030" cast flat top pistons, GM 350cast crank
0 decked block
chevy "041" heads moderately street ported with 2.02 x1.60 valves
10:1 finished compression ratio.
Edelbrock Victor Jr.
Edelbrock Performer 750cfm carb out of the box jetting.
Gm HEI with MSD 6AL 22 inital.....34 total @3200 + vac advance.
Crower 250F258 solid cam #00285

INTAKE: Duration: 276º Lift: 0.548 Clearence Hot: 0.012
EXHAUST: Duration: 280º Lift: 0.551 Clearence Hot: 0.14
The specifications listed above are based on a rockerarm ratio of 1.5 IN
1.5 EX
Duration @.050" 250in / 258ex 104 LSA installed @100 intake C/L

Hedman 1-5/8" long tube headers.

Ran 12.75@105/107MPH with a 10" 3500stall converter
and 4.10's with no tuning.

A fun, low buck street racer combo.

 

Here is another one that worked well for me.

350+.060" 2 bolt block
FM HP345+.060" flat top pistons
decked to .015" deck clearance
DG .015" shim head gaskets
Heavily ported "416" 305HO heads with 1.94X1.60" valves.
Heads max milled to 52cc's
Final compression ratio 12.65:1
Accelerated Motion solid cam
287/296 .537/.557"
256/264@.050 105LSA installed @99 in C/L
Crane 1.5:1 stamped steel roller tip rockers
Holley Strip Dominator single plane intake manifold
Edelbrock Performer 750 cfm carb, stock jetting.
Hedman 1-5/8" long tube headers 2.5" dual exhaust.
GM HEI W/MSD coil, w/locked out advance 36deg.

No time slips but easy 12's at 105 with 3500stall
and 4.10's and ET streets
*needs hi octane fuel

a little faster than the combo above. Could easily use more rear gear and a higher stall as it loved to rev 7000+rpm

 

In the sig....

Shooting for 430+ HP (Flywheel which will only be able to be estimated) should be around 380 (?) RWHP...

One additional thing to ask is an estimated price. I probably have more in mine than it is worth , therefore, I'm not gonna be the first! LOL