Match this 500hp/500lb-ft Combo?

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There is a website and a Facebook page.

His website doesn’t like my browser, or I’d add a link.

Just google “KG Engines”

So far I’ve only had some 906’s from him in my hands........ and after seeing/testing them I’ll never bother doing a high effort set of those again.
 
PRH said:
Okay...... let’s explore that option.
Buy a pair of castings without waiting for the Black Friday sale.......(currently $798/Pr at Jegs).
Do them up just like what’s on your truck engine....... finished, all new parts, ready to bolt on for a HR cam that’s suitable for 500hp.
What’s the bottom line?

Then.......how much more if you’re 1/2 way thru the job and the buyer calls and says...... he’s thinking he really wants more like at least 525hp?
Click to expand...
Then use a 2.02 valve...
They were 1.94 intakes flowing the 260.
Buyers do lots of things but ultimately they are responsible for their change of mind or heart. What's theirs goes back to them on their dime if need be. If you don't know what you want or how to ask for it, simple... 'heres your stuff,bye '.
 
If you just matched the specs from the sbc in a mopar, would you get the same results?
230/236 @.050 duration cam
260cfm int heads
10:4:1 CR
Same intake,
Same carb cfm

The big question I have is: does the exhaust flow on the sbc make a big impact on its breathing? BP has it out flowing the RPMs more than I think could be easily ported, especially at low lifts.

CFM Port Flow Average @ 28"
Lift. - BP. - rpm (Hughes)
.100" - 112 - 55
.200" - 155 - 113
.300" - 186 - 150
.400" - 203 - 176
.500" - 208 - 189
.600" - 216 - 196

Hughes max effort cnc on the exhaust port doesn't even catch up
 
JedIEG said:
If you just matched the specs from the sbc in a mopar, would you get the same results?
230/236 @.050 duration cam
260cfm int heads
10:4:1 CR
Same intake,
Same carb cfm

The big question I have is: does the exhaust flow on the sbc make a big impact on its breathing? BP has it out flowing the RPMs more than I think could be easily ported, especially at low lifts.

CFM Port Flow Average @ 28"
Lift. - BP. - rpm (Hughes)
.100" - 112 - 55
.200" - 155 - 113
.300" - 186 - 150
.400" - 203 - 176
.500" - 208 - 189
.600" - 216 - 196

Hughes max effort cnc on the exhaust port doesn't even catch up
Click to expand...
Speaking for the exhaust alone some know but many don't know very little needs to be done to aftermarket..even the Chinese heads, for them to flow 220. The short side and a valve job, the bowl bump can ever stay!.Its kinda funny. They improved the exhaust a great deal but the intake is near stock when both in ported form..no matter how much work it takes.
 
JedIEG said:
If you just matched the specs from the sbc in a mopar, would you get the same results?
230/236 @.050 duration cam
260cfm int heads
10:4:1 CR
Same intake,
Same carb cfm

The big question I have is: does the exhaust flow on the sbc make a big impact on its breathing? BP has it out flowing the RPMs more than I think could be easily ported, especially at low lifts.

CFM Port Flow Average @ 28"
Lift. - BP. - rpm (Hughes)
.100" - 112 - 55
.200" - 155 - 113
.300" - 186 - 150
.400" - 203 - 176
.500" - 208 - 189
.600" - 216 - 196

Hughes max effort cnc on the exhaust port doesn't even catch up
Click to expand...
That's with or without a pipe?
I figure with pipe since its gonna have one. Doing it without leaves you with a mystery result. Stick a header and short pipe. Go crazy
 
JedIEG said:
If you just matched the specs from the sbc in a mopar, would you get the same results?
230/236 @.050 duration cam
260cfm int heads
10:4:1 CR
Same intake,
Same carb cfm

The big question I have is: does the exhaust flow on the sbc make a big impact on its breathing? BP has it out flowing the RPMs more than I think could be easily ported, especially at low lifts.

CFM Port Flow Average @ 28"
Lift. - BP. - rpm (Hughes)
.100" - 112 - 55
.200" - 155 - 113
.300" - 186 - 150
.400" - 203 - 176
.500" - 208 - 189
.600" - 216 - 196

Hughes max effort cnc on the exhaust port doesn't even catch up
Click to expand...


Exhaust port flow means almost nothing. Porting for and looking at exhaust flow numbers is a good way to kill a lot of power. Fast.
 
rumblefish360 said:
Yea? No ****. Someone actually CNC’a iron heads.
Huh, learned something new today.
Does he have a web site?
Click to expand...
It's a brave new world, port mapping and intellectual property theft. It won't be long before you port a head and find your design getting CNC'd into other heads 2 weeks later, for half the price.. It's been going on here for a while..
 
I would not worry too much about the exhaust flow. My ported Edelbrocks (by Ryan Johnson back in the day) look kinda week on the exhaust side (197 @ 0.600), but they flow 293 @ 0.600 on the intake. I remember thinking that my flow numbers didn't look as good as some others, had me a little worried it would be slow. Ryan told me not to worry....long story short, my street/strip car with a stroked small block runs low 10's @ about 3250 #'s, so apparently I had nothing to worry about.
 
PRH said:
Whenever you see the hp is lower than the TQ....... fundamentally it’s an air flow deficiency in the upper rpms.
Click to expand...

With my blueprinted, stock eddy heads I saw this happen. When I had them ported, my HP exceeded the TQ.
 
JedIEG said:
If you just matched the specs from the sbc in a mopar, would you get the same results?
230/236 @.050 duration cam
260cfm int heads
10:4:1 CR
Same intake,
Same carb cfm

The big question I have is: does the exhaust flow on the sbc make a big impact on its breathing? BP has it out flowing the RPMs more than I think could be easily ported, especially at low lifts.

CFM Port Flow Average @ 28"
Lift. - BP. - rpm (Hughes)
.100" - 112 - 55
.200" - 155 - 113
.300" - 186 - 150
.400" - 203 - 176
.500" - 208 - 189
.600" - 216 - 196

Hughes max effort cnc on the exhaust port doesn't even catch up
Click to expand...

The flow data from Ede is that the Magnum RPM’s flow 251/[email protected], and 260/[email protected].

The cam BP uses with those heads on their 408 is already 5-6* longer than the 230/236 cam in the SBC.

As for the ex flow....... you’re comparing data from two different sources........ which in my mind makes it not comparable.

I just prepped & blended a set of LA RPM heads. They flowed 260/[email protected] lift on my bench.

There is no doubt in my mind I could make over 500/500 with them.
But...... it wouldn’t happen with a 230/236 HR cam.
 
Last edited:
You need to have a purpose when porting. You don't just go all out and then throw it on the bench see what you got... that's a sure way too lose power and kill otherwise perfectly good heads. When you're familiar with the head ...it doesnt take much on the exh side.. especially if theres a decent valve job that meet the chamber wall, bowls around. All the aluminum stuff is easy to get the exh working...even over working. You move in small steps with the exhaust.
What's always struck me... is how high a ratio the chevrolames run... they'll have 260 int and 220 on the exh... is the chamber that bad..lol
 
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