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Another Turbo camsgaft thread !!

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Old Aug 17, 2009 | 05:34 PM
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Default Another Turbo camsgaft thread !!

Hi all just after opinions on these cams, as to wether they would be suitable for my turbo setup

383 strocker
ported heads
Single TC78 @ 16 psi boost

current cam is a mild comp turbo grind
220/208 .554 / .564. 115 lsa


Looking at a couple of Kelford cam grinds

230/238 .600/.600 116 lsa
or
236/248 .610/.610 115 lsa

I'm after something with a reasonably tough sounding idle and great drivability/ street manners and a bit more top end then my current cam.

Have heard the 230/238 it sounded great and drove well on a 5.7 but is sold as a blower cam, will it still work well on my turbo setup ?
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Old Aug 17, 2009 | 06:18 PM
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Get the blower cam from EPP and don't look back.
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Old Aug 17, 2009 | 10:50 PM
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Epp blower cam 232/240 .595 .608 115 lsa

Pretty close to the first kelford cam

yes would be keen, just would work out quite a bit dearer and probably take 3 weeks to get here going by past experience, New Zealand is a long way/echange rate/shipping/import duty, yada yada.
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Old Aug 18, 2009 | 02:15 PM
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I like either one. I'm running a 242/248 .624/.624 on a 115 in mine.
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Old Aug 18, 2009 | 04:16 PM
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Thats a desent size stick !!
what is idle and drivability like ?
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Old Aug 19, 2009 | 11:43 AM
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John have you logged any BP #'s?? If so I would check that before you start going real big on a cam. Too much duration with elevated BP and you will get reversion.
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Old Aug 19, 2009 | 04:08 PM
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Originally Posted by Johnv
Thats a desent size stick !!
what is idle and drivability like ?
Don't know yet, lol. My motor is still at the machine shop.
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Old Aug 19, 2009 | 04:15 PM
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well i would recommend the TU1 camshaft from speedinc ,I used it on 402 with APS TT car made 750rwhp and 790rwtq @12psi,idles like stock and drivability is perfect.
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Old Aug 19, 2009 | 04:17 PM
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I like the look of that 230/238 cam for your setup. Maybe one step smaller. Like a 226/232.
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Old Aug 19, 2009 | 06:59 PM
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I like the 230/238. I suspect the bigger one would push the rpm range above what the T78 would support.
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Old Aug 19, 2009 | 07:20 PM
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I'm running a 232 234 .595/.598 on 112 car just ran a 10.33 at 133 foot braking it at 4300lbs. Wonder what a so call "good" cam would do
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Old Aug 19, 2009 | 07:24 PM
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Originally Posted by DrTurbo
John have you logged any BP #'s?? If so I would check that before you start going real big on a cam. Too much duration with elevated BP and you will get reversion.
Good point ! back pressure is already a problem for sure.
If i can't get a bigger AR housing,I will look at a bigger turbo at some point.
Looking back i think 383 was a bad move for this turbo, much better suited to std cubes.

Don't want to go to big, just my current cam is pretty small, idles like std
and would like a bit more mid range top end.
I have the engine open at the moment to replace an oil pump, so would be easy to do the cam while i'm in there.
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Old Aug 19, 2009 | 08:26 PM
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Originally Posted by Johnv
If i can't get a bigger AR housing,I will look at a bigger turbo at some point.
Looking back i think 383 was a bad move for this turbo, much better suited to std cubes..
Don't kick yourself too hard. My 388/T76 has gone 146 mph in the quarter at 3800 lb and only 17 psi. It will go over 22 psi if I want.
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Old Aug 19, 2009 | 09:36 PM
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Originally Posted by engineermike
Don't kick yourself too hard. My 388/T76 has gone 146 mph in the quarter at 3800 lb and only 17 psi. It will go over 22 psi if I want.
Wow great result !
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Old Aug 19, 2009 | 11:01 PM
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how would you measure back pressure?
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Old Aug 20, 2009 | 07:37 AM
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Originally Posted by MiaSSmaro98
how would you measure back pressure?
drill and tap a hole in the turbo manfold then run a line to a boost gauge, then take it for a blast and moniter gauge reading.
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Old Aug 20, 2009 | 04:37 PM
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so im guessing that if it reads boost then it has to much back pressure?or im i wrong
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Old Aug 21, 2009 | 03:36 AM
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1 to 1 , 1 psi of backpressure to 1 psi of boost would be considered very very good, most setups would be more like 2:1 and 3:1 would be considered high
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Old Aug 21, 2009 | 05:39 AM
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I can't be happier with my little 215/215, .566''/.566'', 114* Isky. Just ran 10.33@129MPH in a 4950LB 4x4 truck. 1.42 60' off the foot break. 370CI, TC76, hand ported 317's.
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Old Aug 21, 2009 | 04:39 PM
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Originally Posted by stock48
I can't be happier with my little 215/215, .566''/.566'', 114* Isky. Just ran 10.33@129MPH in a 4950LB 4x4 truck. 1.42 60' off the foot break. 370CI, TC76, hand ported 317's.
another top result !! thats haulin for a heavy truck..
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