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Officially Bored with 347
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3,584 Posts
Discussion Starter #1
Since i have my car apart again!!!, Im contemplating getting a Hi volume oil pump but have a few Queeries
Do i really need to fit a restrictor kit?
Or should i just hammer the little relief spring plug in abit (have been told to drive it in until it bottoms out to get more kpa)?????
I already have a High Energy sump + mod'd pickup & FMS Needle Roller Cam bearings/Adj Roller rockers..
Is it too much hassle to tap the oil supply holes & fit restrictor plugs?? Someone please give me a few ideas
Cheers
Brett
 

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Two SC 61's = trouble
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6,360 Posts
Hi Brett
I "think" the restrictor kit is mainly for clevelands were they feed there oil differently to most other engines,through their valve gear first which can be a big problem if you have a slight fo-par in the lifters etc..I allso don't think it's advisable with hydaulic lifters.Be carefull with too high pressure and volume it can induce oil surge real bad and can stay up in rocker covers on hard cornering etc.Pumps it out so quick that it doesn't get time to settle back to sump. Do you have a problem with the bottom end or are you trying to be safe?Volume is the way to go,with correct clearences,balancing.You have a 340 crank?Do you have a mains stud girdle?You need some bypass when cold other wise you'll blow oil filters etc, Mellings H.V pump is o/k On interst what crank,rods,pistons do you have?We are keen on that over here in the east.. Thanks..my2c..
 

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Officially Bored with 347
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3,584 Posts
Discussion Starter #3
347 Internals

G'Day Mate......
I bought this 347 kit way back in nov97 & had it fitted in feb this year from Coast High Performance in the US.
The scatt crank was a new unit not one of those offset ground cranks inwhich was nitrided & has 3.4" stroke i think?
The rods are 4340c/moly "crower" units with Probe forged pistons 30 over,Childs+Albert rings etc,ARP rod/main studs + Steel Girdle.
As ya might have seen in the pics Trickflow heads,Edelbrock manifold etc.
The reason i pulled the motor out was for some reason i lost oil pressure not all of it but enuff to make the gauge sit in the red.Ripped it apart today to find 1 bolt from oil pump sitting in the sump & the other worked its way 2mm out & the the oil pump swinging in the breeze.
The eng. was fully balanced,blue printed & properly clearanced by a REPUTABLE ENGINE BUILDER in West Oz (Perth, Morley to be exact)
Ive had 2 oil pickups break within 1yr & thought this was it but to find the pump loose didnt make me a happy camper to say the least & they will be getting a nice visit tomorrow to c if they will come to the party & re-enburse me for the hire & parts so ill c how it goes in the morning...... Cheers :mmmmm:
:fmad: :fmad: :fmad: :fmad: :fmad: :fmad:
 

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Two SC 61's = trouble
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6,360 Posts
Sounds like they were done up finger tight ha?
Hope you can proof it that way.How do you like the t/wedge
heads?I have the same, trouble is the Cobra inlet is quite abit smaller by about 10mm,thinking of getting trick flow inlet?The Cobra seems restrictive near the gasget [bottom].I'v heard to port them to that size they need welding,too expensive.Other good inlets on market today,imported from U.S tho.Wish $ was up 70+c again...Good luck!
 

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Officially Bored with 347
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3,584 Posts
Discussion Starter #5
Yes mate heads are pretty powerful & costly, i went the option of xtra porting/polishing stronger springs/locks/retainers...
I have a set of std heads ported/polished but bare if anyone wants em for $150 for both (cost $900 for porting alone)
Also std crower rods & crank
 

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Two SC 61's = trouble
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6,360 Posts
Yea I bought the one's designed for bracket raceing,better springs,porting.I think the earlier t/flo with the cast iron valve guides had a few problems,but they stopped doing that a few years back.I think they flo better than the Ford inlets by far.Another thing too,mine had BIG chambers like over 68cc way too low compression for a 303 cam.Though I did pull 158 kw at the back wheels.Machined heads down to 58cc what a difference,much more throttle responce now.Had to fly cut the pistons though,the valves are in a different location to std heads.
 
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