BB Street heads for mild 505
#2508638
06/15/18 12:15 AM
06/15/18 12:15 AM
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Joined: Jan 2003
Posts: 4,296 Chicago, IL
TonyS451
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Chicago, IL
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Current combo is a 10-1 505 with box stock stealth heads and comp xe hydraulic flat tappet 240/246 507/510 110 and 850 carb. Assuming I wanted to keep this cam but open to the idea of changing heads to gain more power (provided the gains would be fairly substantial)....Which heads would you recommend? It's a street car with a 4 speed 3.55's. Just in the idea phase and no ideas are bad ones right now Thanks!
2 kids and a dog
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Re: BB Street heads for mild 505
[Re: TonyS451]
#2508649
06/15/18 12:27 AM
06/15/18 12:27 AM
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Joined: Feb 2005
Posts: 20,197 PA.
pittsburghracer
"Little"John
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"Little"John
Joined: Feb 2005
Posts: 20,197
PA.
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Sell the Stealths and look into buying a set of Trickflow heads.
1970 Duster Edelbrock headed 408 5.984@112.52 422 Indy headed small block 5.982@112.56 mph 9.42@138.27
Livin and lovin life one day at a time
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Re: BB Street heads for mild 505
[Re: pittsburghracer]
#2508665
06/15/18 12:54 AM
06/15/18 12:54 AM
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Joined: Dec 2013
Posts: 4,700 Wichita
GY3
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master
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Wichita
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Send the Stealths to Modern Cylinder head for CNC porting.
'63 Dodge 330 11.19 @ 121 mph Pump gas, n/a, through the mufflers on street tires with 3.54's. 3,600 lbs. 10.01 @ 133mph with a 250 shot of nitrous an a splash of race gas. 1.36 60 ft. 3,700 lbs.
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Re: BB Street heads for mild 505
[Re: TonyS451]
#2508725
06/15/18 07:35 AM
06/15/18 07:35 AM
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Joined: Jan 2003
Posts: 10,016 Frostbitefalls MN (Rocky&Bullw...
gregsdart
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I Live Here
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Assuming you want to keep the same cam, what is the usable rpm range of that cam and valvetrain ? If the motor would be limited to say 6,000 rpm, a smaller port head MIGHT be a wise choice, especially with a 3.55 and 4 speed. A comparison of dyno sheets would be nice to see between small and large port heads on a +500 inch motor
8..603 156 mph best, 2905 lbs 549, indy 572-13, alky
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Re: BB Street heads for mild 505
[Re: gregsdart]
#2508748
06/15/18 09:39 AM
06/15/18 09:39 AM
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Joined: Feb 2003
Posts: 1,942 Metro Detroit
OUTLAWD
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top fuel
Joined: Feb 2003
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Metro Detroit
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Assuming you want to keep the same cam, what is the usable rpm range of that cam and valvetrain ? ......... A comparison of dyno sheets would be nice to see between small and large port heads on a +500 inch motor I am torn between STD and MW ports for my 493 re-fresh
Faster, Faster until the thrill of speed overcomes the fear of death...
71 Swinger - slowly collecting dust/parts 66 Belv. II - just a streetcar 88 Mustang - turbo LS beater
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Re: BB Street heads for mild 505
[Re: TonyS451]
#2508779
06/15/18 10:48 AM
06/15/18 10:48 AM
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Joined: May 2008
Posts: 5,399 Aurora, Colorado
451Mopar
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Aurora, Colorado
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Current combo is a 10-1 505 with box stock stealth heads and comp xe hydraulic flat tappet 240/246 507/510 110 and 850 carb. Assuming I wanted to keep this cam but open to the idea of changing heads to gain more power (provided the gains would be fairly substantial)....Which heads would you recommend? It's a street car with a 4 speed 3.55's. Just in the idea phase and no ideas are bad ones right now Thanks! That's close to the 505 combination in my Coronet. 440 source kit with 17cc dished pistons. My stealth heads have been slightly ported, cleaned-up, and multi-angle valve job and now flow a true 290+ cfm with pretty good lower lift flow numbers. They can be ported even more, but I'm running a mild Hydraulic roller cam, Comp XR286HR-10, with HS 1.6:1 rocker arms. I bought the Trick Flow 240s (TFS-6161T784-C00) for another 505 engine. They are pretty nice, and flowed as advertised out of the box. They recommend a slightly different version of the Harlan Sharpe rocker arms S70016KE, but I haven't compared the two sets to see what the difference is? The smaller chamber would raise your compression ratio also. For this new 505, I am using the 27cc dish pistons to keep compression down for junk gas, but using a slightly larger solid roller cam, Lunati Voodoo 40230732LK, 243/249 @ 0.050". If your looking to build a wilder, higher HP engine, then start with the larger Max Wedge sized port heads (Trick Flow 270) and intake, and get a larger cam.
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Re: BB Street heads for mild 505
[Re: TonyS451]
#2508787
06/15/18 11:02 AM
06/15/18 11:02 AM
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Joined: Jan 2003
Posts: 4,296 Chicago, IL
TonyS451
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I don't expect to spin this past 6 grand.
Great ideas. I'm also curious to know if Max wedge ports would be beneficial in a lower rpm set up like this? So if I wanted to run trick flows, I would need special 1000 dollar rockers? Makes them not such a great bargain. I guess if you need rockers anyway...
2 kids and a dog
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Re: BB Street heads for mild 505
[Re: Cab_Burge]
#2508793
06/15/18 11:10 AM
06/15/18 11:10 AM
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Joined: Jan 2003
Posts: 4,296 Chicago, IL
TonyS451
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Sell the Stealths and step up to a max wedge port size or bigger My old pump gas Duster ran high 10.60s with ported big valve 906, ran 10.30 with CNC ported eddy RPM and ran 9.993 with a set of Indy SR M.W. size intake ports non CNC ported I did dyno test a set of CNC ported 440-1 on that motor and they where 50 HP better than the SR M.W. heads, I put the ported 440-1 on my bracket race 526 C.I. high deck 440 motor to sell it Bottom line is more air, more fuel, more power Good info, Cab. The 906 to CNC eddys is probably the type of switch I'd be looking at. That picked up quite a bit. Just head swap and no other changes?
2 kids and a dog
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Re: BB Street heads for mild 505
[Re: TonyS451]
#2508795
06/15/18 11:14 AM
06/15/18 11:14 AM
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Joined: Feb 2005
Posts: 20,197 PA.
pittsburghracer
"Little"John
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"Little"John
Joined: Feb 2005
Posts: 20,197
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I would hate to see you dump 1000.00 more into a set of Stealth heads having them ported and then crack like another member recently posted. The Stealths have their place for many and can easily flow 300 cfm but and I’ll leave it at but.
1970 Duster Edelbrock headed 408 5.984@112.52 422 Indy headed small block 5.982@112.56 mph 9.42@138.27
Livin and lovin life one day at a time
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Re: BB Street heads for mild 505
[Re: pittsburghracer]
#2508802
06/15/18 11:23 AM
06/15/18 11:23 AM
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Joined: Jan 2003
Posts: 4,296 Chicago, IL
TonyS451
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I would hate to see you dump 1000.00 more into a set of Stealth heads having them ported and then crack like another member recently posted. The Stealths have their place for many and can easily flow 300 cfm but and I’ll leave it at but. I agree!
2 kids and a dog
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Re: BB Street heads for mild 505
[Re: TonyS451]
#2508824
06/15/18 12:01 PM
06/15/18 12:01 PM
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Joined: Jan 2003
Posts: 14,514 So. Burlington, Vt.
fast68plymouth
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I Live Here
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Change the cam when the new or updated heads go on.
68 Satellite, 383 with stock 906’s, 3550lbs, 11.18@123 Dealer for Comp Cams/Indy Heads
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Re: BB Street heads for mild 505
[Re: pittsburghracer]
#2508828
06/15/18 12:08 PM
06/15/18 12:08 PM
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Joined: Jan 2005
Posts: 1,776 Keymar, MD
DusterKid
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I would hate to see you dump 1000.00 more into a set of Stealth heads having them ported and then crack like another member recently posted. The Stealths have their place for many and can easily flow 300 cfm but and I’ll leave it at but. I had my stealth mildly ported 2 years ago. Gains were minimal. (Maybe 1/2 tenth in the 1/4). Last fall I bought a set of TF 240s and picked up 3 1/2 tenths. (Not a total apples to apples comparison as I did go to a smaller cam, smaller tube headers and up my compression by about 1/2 pt). If I had to do over again, I would never had the stealths ported, I would have just bought the TF 240..
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Re: BB Street heads for mild 505
[Re: fast68plymouth]
#2508829
06/15/18 12:08 PM
06/15/18 12:08 PM
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Joined: Feb 2005
Posts: 20,197 PA.
pittsburghracer
"Little"John
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"Little"John
Joined: Feb 2005
Posts: 20,197
PA.
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Change the cam when the new or updated heads go on. I agree. My 500 loved my old 690 lift cam and the springs lasted forever. May not be what you are looking for but hey, we are good at spending others guys money. Lol.
1970 Duster Edelbrock headed 408 5.984@112.52 422 Indy headed small block 5.982@112.56 mph 9.42@138.27
Livin and lovin life one day at a time
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Re: BB Street heads for mild 505
[Re: TonyS451]
#2508842
06/15/18 12:35 PM
06/15/18 12:35 PM
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Joined: Jan 2003
Posts: 14,514 So. Burlington, Vt.
fast68plymouth
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I Live Here
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So. Burlington, Vt.
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The ootb stealth vs RPM vs ported vs ootb TF 240 on a pretty hot street 505 type build would be an interesting and fun dyno thrash.
68 Satellite, 383 with stock 906’s, 3550lbs, 11.18@123 Dealer for Comp Cams/Indy Heads
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Re: BB Street heads for mild 505
[Re: fast68plymouth]
#2508843
06/15/18 12:37 PM
06/15/18 12:37 PM
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Joined: Jan 2003
Posts: 4,296 Chicago, IL
TonyS451
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Chicago, IL
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Change the cam when the new or updated heads go on. Oh sure, next thing you know it's a race car!
2 kids and a dog
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Re: BB Street heads for mild 505
[Re: TonyS451]
#2508851
06/15/18 12:48 PM
06/15/18 12:48 PM
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Joined: Feb 2005
Posts: 20,197 PA.
pittsburghracer
"Little"John
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"Little"John
Joined: Feb 2005
Posts: 20,197
PA.
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Change the cam when the new or updated heads go on. Oh sure, next thing you know it's a race car! Is there anything else.
1970 Duster Edelbrock headed 408 5.984@112.52 422 Indy headed small block 5.982@112.56 mph 9.42@138.27
Livin and lovin life one day at a time
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