Need Help With More Hp From 434 SBC

[automotivebreath]

Originally Posted by MaxRaceSoftware

i've made myself a few Custom metal thickness checkers about 30+ years ago,
and they work great as you never breakout thru pushrod sides
and if your careful you can maintain wall thickness in that area to around
.040" ...then you attack the Port's Center divider wall for the rest of the CSA.

After cutting through my own heads I decided to take action before I cut through
someone else's heads. I found this neat caliper designed to measure disc brake
rotors. It works great for probing ports, I haven't cut through since.

[MaxRaceSoftware]

Originally Posted by automotivebreath

After cutting through my own heads I decided to take action before I cut through
someone else's heads. I found this neat caliper designed to measure disc brake
rotors. It works great for probing ports, I haven't cut through since.

Great Tool !!!

where can i get one ?


Everybody said it wouldn't run because of the heads but surprisingly it's been
9.4's, it says a lot for the little darts.


Yes...those Dart Pro-1's 215 or 230CC versions are awesome !,
at least to my own way of Porting !
They compliment my Style of Porting !

i'd Lump together the Brodix Track 1's and the AFR 227's into
the same similar style Port Shape and Theory

and 'd Lump the Dart Pro-1's and the ProAction/ProTopLine/-RHS Heads
together as another Style or Port Shape and Theory.

and the Dyno tests i've done so far with my style of Porting
if you were to have all 4 of these Heads all Flowing the same CFM
on a FlowBench like for example-> 310 CFM,

i've seen the Dart Pro 1-s make 40+ more Peak HP and much more after
Peak HP than the same exact Flow Numbers in the AFR 227's

i guess the Darts suite my Porting style ??
others might find exactly opposite results ?
but i prefer the
Dart Pro 1s and ProAction/ProTopLine/RHS
then the Track 1's as you have more metal you can work with
then the AFR's

[automotivebreath]

where can i get one ?

It's called a Digital Brake Gauge made be "Storm"


Yes...those Dart Pro-1's 215 or 230CC versions are awesome !

I find it very easy to make the darts work, with out major reshaping just removing
a minimal amount of metal in the right places. Even with the RHS/TopLine heads I
end up spending more time with the shape to get them to work .

Got any pictures of those those ported Dart Pro-1's?

[killacamaro]

Originally Posted by MaxRaceSoftware

i'm a Compression Ratio "Freak"

either i misunderstood KillaCamaro's CR question
or he misunderstood my answer ?

i definetly don't remember advising him
that there would be no more HP and TQ to gain
from increasing CR !!!

i would advise him to run at least 14:1 CR and upwards

we've tried as high as 16.7 to 16.8:1 on Craigs A/ND
and we currently run 16.2:1 CR on Jeff Colletta's NPS BBC632 1322HP / 1640's on Legal NOS jet

Video of Jeff_Colletta_BC632_1316-HP - Photobucket - Video and Image Hosting


---------------------------------------------

both our SBC434's are'nt too far away from each other in Part's Specs,
but i'm wondering why Killa's 434 is Peaking so low in RPM ??
with the same Dart Pro-1's ?


it seems there's a severe CSA speed problem !

the Dart Pro-1's on Danny's 434 are the best i can do
without welding pushrod areas up + widening the pushrod pinch.
We're making Peak HP @ 7500 and Peak TQ @ 6300 RPM

there's more HP there welding those Heads
and on Dany's 434 it really need a pair of larger Headers,
but we used what he already had.

Danny's Pro-1's are 215 CC correct?Mines r 230cc!I wonder why on the spray he isn't running to much faster Meaux?It seems like he should have been good for about a 8.50!How better flow or should I say HP would I get for welding up different
areas on head?R u a fan of the 4/7 cam swap,aluminum rods,and coating everything?Thanks Mr. Larry

[killacamaro]

Originally Posted by automotivebreath

where can i get one ?

It's called a Digital Brake Gauge made be "Storm"


Yes...those Dart Pro-1's 215 or 230CC versions are awesome !

I find it very easy to make the darts work, with out major reshaping just removing
a minimal amount of metal in the right places. Even with the RHS/TopLine heads I
end up spending more time with the shape to get them to work .

Got any pictures of those those ported Dart Pro-1's?

Thanks for helping on my engine automotivebreath!What kind of flow have u been able to obtain on the Dart Heads!

[MaxRaceSoftware]

Danny's Pro-1's are 215 CC correct?Mines r 230cc!I wonder why on the spray he isn't running to much faster Meaux?It seems like he should have been good for about a 8.50!How better flow or should I say HP would I get for welding up different
areas on head?R u a fan of the 4/7 cam swap,aluminum rods,and coating everything?Thanks Mr. Larry

Danny's Blazer is 320 Lbs. heavier than your Camaro,
and has much more Frontal Area and worse Aerodynamics.
Danyy's only spraying 200 HP NOS on the 8.830 ET 154 MPH (as high as 156 best)
to your 250 NOS..... 50 HP less.

i ran another ETA Simulation to see how much a 200 HP NOS should
make Danny run ...and it correlated almost exactly like it should !

here's the Simulation

Danny's 756 Dyno HP + 200 HP NOS= 956 potential



in order to run 8.50's in Danny's Blazer,
he would need to spray 360 HP of NOS or better at his Weight/Aerodynamics

Danny's Heads are the older style Dart Pro-1 215 CC's
(not the new Platniums)
i installed 2.125/1.600 Manley Valves

Danny's Cam Motion solid roller is not a 4/7 Swap,
its just a regular OEM Firing Order

------------

You don't need to do any Welding to get your Heads to make more HP,
just Porting/reshaping, of course if you wanted...Welding would add another
+20 HP potential.

You need more Valve Lift after i would reshape Ports/Valve Job
and your Engine would then love and respond to a HP-1250 or larger Carb
than a 1050

-------------------


Here's another SBC 420.4 CID 4.155x3.875 Combination
i just Dyno tested on July 13, 2008

this is my best Pump Gas 10.5:1 CR SBC 420 cid Combination
it was Dynoed on Chevron Prem Pump Gas
Moroso 4-Vane enhanced Vac-Pump
same Cam Motion solid roller as 434
ProSystems 1300 CFM Carb
Edelbrock Super Victor maxed-out w/65000 Moroso Dominator adapter spacer
Hamburger oil pan
cranking psi on Cyl# 2 after 10 needle pulses= 154 psi
114 Centers and Cam on 110 CL
Jesel 1.80/1.70

made on my SF-901 @ 600 RPM/SEC

712.2 Peak HP @ 7400
537.5 Peak TQ @ 6600

has 215 CC Dart Pro-1's old style with Manley 2.125/1.600 valves
Ported to same specs as Dany's Pro-1's

as soon as the Customer races it down the Dragstrip
i'll post Weather Conditions, Incremental Times, and Dyno Numbers/Graphs

very flat TQ Curve

you can run this 10.5:1 CR Engine on Pump gas all day

[rookie]

Two questions if I may, and they are not loaded ones, I promise.

How much hp if any are you seeing with the Moroso 4-Vane enhanced Vac-Pump?

What valve spring do you run and how long do they live at those lifts?

I know that is one of the keys to good power, but most people are not willing to spend the money.

[killacamaro]

Originally Posted by MaxRaceSoftware

Danny's Blazer is 320 Lbs. heavier than your Camaro,
and has much more Frontal Area and worse Aerodynamics.
Danyy's only spraying 200 HP NOS on the 8.830 ET 154 MPH (as high as 156 best)
to your 250 NOS..... 50 HP less.

i ran another ETA Simulation to see how much a 200 HP NOS should
make Danny run ...and it correlated almost exactly like it should !

here's the Simulation

Danny's 756 Dyno HP + 200 HP NOS= 956 potential



in order to run 8.50's in Danny's Blazer,
he would need to spray 360 HP of NOS or better at his Weight/Aerodynamics

Danny's Heads are the older style Dart Pro-1 215 CC's
(not the new Platniums)
i installed 2.125/1.600 Manley Valves

Danny's Cam Motion solid roller is not a 4/7 Swap,
its just a regular OEM Firing Order

------------

You don't need to do any Welding to get your Heads to make more HP,
just Porting/reshaping, of course if you wanted...Welding would add another
+20 HP potential.

You need more Valve Lift after i would reshape Ports/Valve Job
and your Engine would then love and respond to a HP-1250 or larger Carb
than a 1050

-------------------


Here's another SBC 420.4 CID 4.155x3.875 Combination
i just Dyno tested on July 13, 2008

this is my best Pump Gas 10.5:1 CR SBC 420 cid Combination
it was Dynoed on Chevron Prem Pump Gas
Moroso 4-Vane enhanced Vac-Pump
same Cam Motion solid roller as 434
ProSystems 1300 CFM Carb
Edelbrock Super Victor maxed-out w/65000 Moroso Dominator adapter spacer
Hamburger oil pan
cranking psi on Cyl# 2 after 10 needle pulses= 154 psi
114 Centers and Cam on 110 CL
Jesel 1.80/1.70

made on my SF-901 @ 600 RPM/SEC

712.2 Peak HP @ 7400
537.5 Peak TQ @ 6600

has 215 CC Dart Pro-1's old style with Manley 2.125/1.600 valves
Ported to same specs as Dany's Pro-1's

as soon as the Customer races it down the Dragstrip
i'll post Weather Conditions, Incremental Times, and Dyno Numbers/Graphs

very flat TQ Curve

you can run this 10.5:1 CR Engine on Pump gas all day

I believe when u r calculating Danny's numbers u r not adding enough TQ from the nos .That motor on NOS should make way more than 734 tq on the spray!I made 588tq on motor and with a 150shot 778lbft tq at 5200rpm!With a 325pill it made 916tq at 5200rpm.

[killacamaro]

Originally Posted by rookie

Two questions if I may, and they are not loaded ones, I promise.

How much hp if any are you seeing with the Moroso 4-Vane enhanced Vac-Pump?

What valve spring do you run and how long do they live at those lifts?

I know that is one of the keys to good power, but most people are not willing to spend the money.

I'm not Larry Meaux;however I hang around the dyno all the time!The hp gain with the vacuum pump depends on the size of the motor and how good it is sealed up!On a average I see anywhere from (8-20hp)on a small block and (20-40hp)on a big block!I have had good luck with the isky spring while others like the manley nextel springs!

[Stan Weiss]

Originally Posted by killacamaro

I believe when u r calculating Danny's numbers u r not adding enough TQ from the nos .That motor on NOS should make way more than 734 tq on the spray!I made 588tq on motor and with a 150shot 778lbft tq at 5200rpm!With a 325pill it made 916tq at 5200rpm.

588tq on motor @ 5200
I calculate 740tq @ 5200 with 150 HP shoot
I calculate 916tq @ 5200 with 325 HP shoot