Re: BB Street heads for mild 505
[Re: TonyS451]
#2509331
06/16/18 01:54 PM
06/16/18 01:54 PM
|
Joined: May 2008
Posts: 5,399 Aurora, Colorado
451Mopar
master
|
master
Joined: May 2008
Posts: 5,399
Aurora, Colorado
|
I'm not sure how accurate this info is on the stealth head flow numbers out of the box, but I found this Hot Rod article where max flow was only 158.5 @ 0.500" http://www.hotrod.com/articles/mopp-1205-big-block-cylinder-head-testing-flow-charts/This is what my stealth heads flowed with just a bit of hand porting (gasket match, bowl blending, and valve job.) Not a huge improvement like CNC porting, but basically just cost me some time and the money for the valve job (and extra to flow the head just to see where it was at.) Lift Intake Exhaust 0.100" / 82 / 81 0.200" / 157 / 127 0.300" / 221 / 151 0.400" / 260 / 174 0.500" / 278 / 190 0.600" / 283 / 200 0.700" / 289 / 211 0.800" / 289 / 215 I posted this way back in Jan, 2013 when I was putting the engine together. https://board.moparts.org/ubbthreads/ubbt...tml#Post1024402
|
|
|
Re: BB Street heads for mild 505
[Re: 451Mopar]
#2509452
06/16/18 10:33 PM
06/16/18 10:33 PM
|
Joined: Jan 2003
Posts: 4,296 Chicago, IL
TonyS451
OP
master
|
OP
master
Joined: Jan 2003
Posts: 4,296
Chicago, IL
|
I'm not sure how accurate this info is on the stealth head flow numbers out of the box, but I found this Hot Rod article where max flow was only 158.5 @ 0.500" http://www.hotrod.com/articles/mopp-1205-big-block-cylinder-head-testing-flow-charts/This is what my stealth heads flowed with just a bit of hand porting (gasket match, bowl blending, and valve job.) Not a huge improvement like CNC porting, but basically just cost me some time and the money for the valve job (and extra to flow the head just to see where it was at.) Lift Intake Exhaust 0.100" / 82 / 81 0.200" / 157 / 127 0.300" / 221 / 151 0.400" / 260 / 174 0.500" / 278 / 190 0.600" / 283 / 200 0.700" / 289 / 211 0.800" / 289 / 215 I posted this way back in Jan, 2013 when I was putting the engine together. https://board.moparts.org/ubbthreads/ubbt...tml#Post1024402 That's good info. Do the stealths really flow that poorly at .500?? That's really bad, even on the exhaust side.
2 kids and a dog
|
|
|
Re: BB Street heads for mild 505
[Re: TonyS451]
#2509562
06/17/18 11:42 AM
06/17/18 11:42 AM
|
Joined: May 2008
Posts: 5,399 Aurora, Colorado
451Mopar
master
|
master
Joined: May 2008
Posts: 5,399
Aurora, Colorado
|
The flow bench that my heads were flowed on is an older SF-110 model. I think the cylinder bore size was only 4.25". Not sure what entry radius, if any was used? I have had 4 heads flowed on that machine, so I just compare what the different heads flowed, and the last 3 seemed reasonable, if not a bit low. The last head flowed at that shop were the Trick Flow 240's and the results were all messed up, not sure if something was going wrong with the test or machine, but the numbers were way low. Took the heads to another shop with a newer SF-1020 flow bench and the flow results were very close to the advertised ratings from Trick Flow.
|
|
|
Re: BB Street heads for mild 505
[Re: TonyS451]
#2510152
06/18/18 09:09 PM
06/18/18 09:09 PM
|
Joined: Jan 2003
Posts: 14,514 So. Burlington, Vt.
fast68plymouth
I Live Here
|
I Live Here
Joined: Jan 2003
Posts: 14,514
So. Burlington, Vt.
|
Ootb stealth from a few months ago vs valve job, back cut, bowl blend.
28”, 4.375 bore, radius inlet plate, no tube on ex
Ootb: Lift——in/ex .100—65.7/51.8 .200–134.8/101.2 .300–197.2/135.4 .400–241.2/159.0 .450–248.7/167.1 .500–254.3/174.4 .550–256.1/179.8 .600–256.9/184.2
2 mins(or less) in the intake bowl will get it into the 260’s
Cut seats, back cut valves, blend bowls: Lift——in/ex .100—72.1/59.1 .200–147.6/112.2 .300–210.4/144.4 .400–254.3/166.4 .450–267.4/176.1 .500–273.7/185.9 .550–277.5/193.2 .600–280.5/198.1
68 Satellite, 383 with stock 906’s, 3550lbs, 11.18@123 Dealer for Comp Cams/Indy Heads
|
|
|
Re: BB Street heads for mild 505
[Re: fast68plymouth]
#2510170
06/18/18 09:47 PM
06/18/18 09:47 PM
|
Joined: Jan 2003
Posts: 4,296 Chicago, IL
TonyS451
OP
master
|
OP
master
Joined: Jan 2003
Posts: 4,296
Chicago, IL
|
Ootb stealth from a few months ago vs valve job, back cut, bowl blend.
28”, 4.375 bore, radius inlet plate, no tube on ex
Ootb: Lift——in/ex .100—65.7/51.8 .200–134.8/101.2 .300–197.2/135.4 .400–241.2/159.0 .450–248.7/167.1 .500–254.3/174.4 .550–256.1/179.8 .600–256.9/184.2
2 mins(or less) in the intake bowl will get it into the 260’s
Cut seats, back cut valves, blend bowls: Lift——in/ex .100—72.1/59.1 .200–147.6/112.2 .300–210.4/144.4 .400–254.3/166.4 .450–267.4/176.1 .500–273.7/185.9 .550–277.5/193.2 .600–280.5/198.1
So, if the theory of 1cfm per 2hp is correct, that small amount of head work may equal a 40hp improvement ?? That's money well spent
2 kids and a dog
|
|
|
Re: BB Street heads for mild 505
[Re: 383man]
#2510172
06/18/18 09:50 PM
06/18/18 09:50 PM
|
Joined: Jan 2003
Posts: 4,296 Chicago, IL
TonyS451
OP
master
|
OP
master
Joined: Jan 2003
Posts: 4,296
Chicago, IL
|
I am curious as since I put my eng in my 63 together in 2011 I have not looked hard at bigblock heads. And I was curious if the Trick Flows use raised exh ports or standard height exh ports ? I really have not looked into them as I have no plans to change anything big on my car. I do know in 2011 when I bought aluminum heads I went with the basic Indy SEZ heads I bought from Dwayne Porter and he sold them to me for a good reasonable price. There was no Trick Flow heads in 2011 when I built my 493. Dwayne opened up the intake ports to max wedge size as I figured why not in case I want to step it up some later. But I liked the fact the SEZ heads have standard exh ports and I did not need to buy offset rockers or did not need to use external oiling to the heads and could use standard headers. I wanted to keep my eng build very basic and simple since I drive it a lot on the street. I am curious as to how the Indy SEZ heads compare to the Trick flows in performance and price today ? I don't seem to here as much about the Indy SEZ and EZ heads since the Trick Flows came out. Ron I am curious as since I put my eng in my 63 together in 2011 I have not looked hard at bigblock heads. And I was curious if the Trick Flows use raised exh ports or standard height exh ports ? I really have not looked into them as I have no plans to change anything big on my car. I do know in 2011 when I bought aluminum heads I went with the basic Indy SEZ heads I bought from Dwayne Porter and he sold them to me for a good reasonable price. There was no Trick Flow heads in 2011 when I built my 493. Dwayne opened up the intake ports to max wedge size as I figured why not in case I want to step it up some later. But I liked the fact the SEZ heads have standard exh ports and I did not need to buy offset rockers or did not need to use external oiling to the heads and could use standard headers. I wanted to keep my eng build very basic and simple since I drive it a lot on the street. I am curious as to how the Indy SEZ heads compare to the Trick flows in performance and price today ? I don't seem to here as much about the Indy SEZ and EZ heads since the Trick Flows came out. Ron Ron - I don't think you could have put together a better working combination for the money. Well done!
2 kids and a dog
|
|
|
Re: BB Street heads for mild 505
[Re: TonyS451]
#2510324
06/19/18 10:57 AM
06/19/18 10:57 AM
|
Joined: Jan 2003
Posts: 14,514 So. Burlington, Vt.
fast68plymouth
I Live Here
|
I Live Here
Joined: Jan 2003
Posts: 14,514
So. Burlington, Vt.
|
Ootb stealth from a few months ago vs valve job, back cut, bowl blend.
28”, 4.375 bore, radius inlet plate, no tube on ex
Ootb: Lift——in/ex .100—65.7/51.8 .200–134.8/101.2 .300–197.2/135.4 .400–241.2/159.0 .450–248.7/167.1 .500–254.3/174.4 .550–256.1/179.8 .600–256.9/184.2
2 mins(or less) in the intake bowl will get it into the 260’s
Cut seats, back cut valves, blend bowls: Lift——in/ex .100—72.1/59.1 .200–147.6/112.2 .300–210.4/144.4 .400–254.3/166.4 .450–267.4/176.1 .500–273.7/185.9 .550–277.5/193.2 .600–280.5/198.1
So, if the theory of 1cfm per 2hp is correct, that small amount of head work may equal a 40hp improvement ?? That's money well spent On a build where the hp/ci is about 1.1, I don’t think you’d see 2hp/cfm gain.
68 Satellite, 383 with stock 906’s, 3550lbs, 11.18@123 Dealer for Comp Cams/Indy Heads
|
|
|
Re: BB Street heads for mild 505
[Re: Jerry]
#2510332
06/19/18 11:43 AM
06/19/18 11:43 AM
|
Joined: Jan 2003
Posts: 14,514 So. Burlington, Vt.
fast68plymouth
I Live Here
|
I Live Here
Joined: Jan 2003
Posts: 14,514
So. Burlington, Vt.
|
whats the cost of back cut, valve job and bowl blend? Starting with new** stealth heads........ -disassemble -measure guides * -machine and finish grind seats -back cut valves -blend bowls -flow test one cylinder -jet wash heads -test springs -reassemble heads —————— $450 *if guides need honing it will be an extra charge **Used heads will need to be jet washed and bead blasted prior to the seats being cut and bowls blended, and the valves will also need to be cleaned, bead blasted, and refaced..... all of which will add $150 to the total.
68 Satellite, 383 with stock 906’s, 3550lbs, 11.18@123 Dealer for Comp Cams/Indy Heads
|
|
|
Re: BB Street heads for mild 505
[Re: TonyS451]
#2510663
06/20/18 03:01 AM
06/20/18 03:01 AM
|
Joined: Jan 2003
Posts: 27,421 Balt. Md
383man
Too Many Posts
|
Too Many Posts
Joined: Jan 2003
Posts: 27,421
Balt. Md
|
I am curious as since I put my eng in my 63 together in 2011 I have not looked hard at bigblock heads. And I was curious if the Trick Flows use raised exh ports or standard height exh ports ? I really have not looked into them as I have no plans to change anything big on my car. I do know in 2011 when I bought aluminum heads I went with the basic Indy SEZ heads I bought from Dwayne Porter and he sold them to me for a good reasonable price. There was no Trick Flow heads in 2011 when I built my 493. Dwayne opened up the intake ports to max wedge size as I figured why not in case I want to step it up some later. But I liked the fact the SEZ heads have standard exh ports and I did not need to buy offset rockers or did not need to use external oiling to the heads and could use standard headers. I wanted to keep my eng build very basic and simple since I drive it a lot on the street. I am curious as to how the Indy SEZ heads compare to the Trick flows in performance and price today ? I don't seem to here as much about the Indy SEZ and EZ heads since the Trick Flows came out. Ron I am curious as since I put my eng in my 63 together in 2011 I have not looked hard at bigblock heads. And I was curious if the Trick Flows use raised exh ports or standard height exh ports ? I really have not looked into them as I have no plans to change anything big on my car. I do know in 2011 when I bought aluminum heads I went with the basic Indy SEZ heads I bought from Dwayne Porter and he sold them to me for a good reasonable price. There was no Trick Flow heads in 2011 when I built my 493. Dwayne opened up the intake ports to max wedge size as I figured why not in case I want to step it up some later. But I liked the fact the SEZ heads have standard exh ports and I did not need to buy offset rockers or did not need to use external oiling to the heads and could use standard headers. I wanted to keep my eng build very basic and simple since I drive it a lot on the street. I am curious as to how the Indy SEZ heads compare to the Trick flows in performance and price today ? I don't seem to here as much about the Indy SEZ and EZ heads since the Trick Flows came out. Ron Ron - I don't think you could have put together a better working combination for the money. Well done! Thank you Tony. Ron
|
|
|
Re: BB Street heads for mild 505
[Re: TonyS451]
#2513417
06/26/18 11:50 AM
06/26/18 11:50 AM
|
Joined: Jan 2003
Posts: 14,514 So. Burlington, Vt.
fast68plymouth
I Live Here
|
I Live Here
Joined: Jan 2003
Posts: 14,514
So. Burlington, Vt.
|
Power potential wise, the E street is the same as the RPM. It’s the same casting.
68 Satellite, 383 with stock 906’s, 3550lbs, 11.18@123 Dealer for Comp Cams/Indy Heads
|
|
|
Re: BB Street heads for mild 505
[Re: fast68plymouth]
#2513537
06/26/18 04:13 PM
06/26/18 04:13 PM
|
Joined: Jan 2003
Posts: 4,296 Chicago, IL
TonyS451
OP
master
|
OP
master
Joined: Jan 2003
Posts: 4,296
Chicago, IL
|
Power potential wise, the E street is the same as the RPM. It’s the same casting. Is it just a smaller chamber ?
2 kids and a dog
|
|
|
Re: BB Street heads for mild 505
[Re: AndyF]
#2563446
10/13/18 04:30 PM
10/13/18 04:30 PM
|
Joined: Jan 2003
Posts: 4,296 Chicago, IL
TonyS451
OP
master
|
OP
master
Joined: Jan 2003
Posts: 4,296
Chicago, IL
|
Even with a mild cam those heads will make the car feel like a race car when you put your foot into it. They really work. Looking forward to getting it going!
Last edited by TonyS451; 10/13/18 04:35 PM.
2 kids and a dog
|
|
|
|
|