Johnv

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 ?

87silverbullet

iTrader: (11)

Get the blower cam from EPP and don't look back.

Johnv

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.

TurboAv

iTrader: (6)

I like either one. I'm running a 242/248 .624/.624 on a 115 in mine.

Johnv

Thats a desent size stick !!
what is idle and drivability like ?

DrTurbo

iTrader: (3)

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.

TurboAv

iTrader: (6)

Don't know yet, lol. My motor is still at the machine shop.

XPerformance

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.

98Z28CobraKiller

iTrader: (17)

I like the look of that 230/238 cam for your setup. Maybe one step smaller. Like a 226/232.

engineermike

I like the 230/238. I suspect the bigger one would push the rpm range above what the T78 would support.

perdieu

iTrader: (1)

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

Johnv

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.

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.

Johnv

Wow great result !

MiaSSmaro98

iTrader: (9)

how would you measure back pressure?

Johnv

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.

MiaSSmaro98

iTrader: (9)

so im guessing that if it reads boost then it has to much back pressure?or im i wrong

Johnv

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

stock48

iTrader: (17)

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.

Johnv

another top result !! thats haulin for a heavy truck..