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Need help rebuilding 241 heads plz

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Old 07-09-2017, 07:21 AM
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Default Need help rebuilding 241 heads plz

Hi guys sorry for the noob question

but just had my 241 heads
faced/decked hand ported but they are bare (was exchange) my mate said he could do it all for an extra $660 aud..


Need new parts to rebuild them was curious what the orignal part numbers are for exhaust & intake valves etc or aftermarket parts standard specs going on a boosted LS1
Never done heads before but keen to learn and give it ago


cheers.

what i got so far?


Last edited by LazyR8; 07-09-2017 at 08:43 AM.
Old 07-09-2017, 09:25 AM
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Default BBB Valves

Hi, I fit Bosa Brothers Valves (BBB), they are made in Argentina. (SuperTech)

I use their Inconel EX and the intake a Blank Nitrate OR ??? for lower weight.

I would get the Springs, CHE's, and ???

I SHIP USPS International POR. (one shipment with low Duty costs)

What country ?

Lance
Old 07-09-2017, 09:31 AM
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Originally Posted by Pantera EFI
Hi, I fit Bosa Brothers Valves (BBB), they are made in Argentina. (SuperTech)

I use their Inconel EX and the intake a Blank Nitrate OR ??? for lower weight.

I would get the Springs, CHE's, and ???

I SHIP USPS International POR. (one shipment with low Duty costs)

Lance

I'm in Australia mate.

wants something thats proven to be good... do it once do it right ☺
Old 07-09-2017, 09:44 AM
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Default Valve Springs, Valves, etc.

Hi, check around most EFI guys (AUS) know that I provide the IGN-1A Ignition Coil.
They should give you a report about PanteraEFI.com

I would use a Flat Rate Box (Marine Diesel) items for NO duty.

I would fit PSI-1511 ML Valve Springs.

You need to state "Boost", RPM, expected HP, Valve Lift, AND MORE ?


Thus fill the shipment box to MAX Weight.

LANCE
Old 07-09-2017, 09:55 AM
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Originally Posted by Pantera EFI
Hi, check around most EFI guys (AUS) know that I provide the IGN-1A Ignition Coil.
They should give you a report about PanteraEFI.com

I would use a Flat Rate Box (Marine Diesel) items for NO duty.

I would fit PSI-1511 ML Valve Springs.

You need to state "Boost", RPM, expected HP, Valve Lift, AND MORE ?


Thus fill the shipment box to MAX Weight.

LANCE

14psi
lil john camTURBO STAGE II CAM
Cam specs are 226/231 .605"/.598" 113+4
.660" LIFT PLATINUM SPRING KIT WITH TITANIUM RETAINERS
BTR CHROMOLY ONE PIECE PUSHRODS; 7.400" LONG, 5/16" DIAMETER, .080" WALL,

hoping to get around 620 atw.
Old 07-09-2017, 10:27 AM
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Default CHE + Valves + Timing Set

Hi R8, OK, the valve box could be "weighted" with the CHE Rocker Trunion kit.

I would Time-Sert "rose bud" the head rocker bolt locations.
I would fit top quality rocker arm bolts.
I would include a valve seal request.

Remember the cylinder pressure is great with a Turbo AND your chosen EX cam lobe opening timing event will cause greater pressure on the rocker arm than a N/A EX rocker.

Do you have a Timing Chain set ?

Lance
Old 07-09-2017, 10:54 AM
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Originally Posted by Pantera EFI
Hi R8, OK, the valve box could be "weighted" with the CHE Rocker Trunion kit.

I would Time-Sert "rose bud" the head rocker bolt locations.
I would fit top quality rocker arm bolts.
I would include a valve seal request.

Remember the cylinder pressure is great with a Turbo AND your chosen EX cam lobe opening timing event will cause greater pressure on the rocker arm than a N/A EX rocker.

Do you have a Timing Chain set ?

Lance
have a crow cams trunion kit
and using a rollmaster double row timing chain gear set.
Old 07-09-2017, 11:10 AM
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Default Time Sert Rocker Bolt Locations

Hi R8, understood.

Will you Time Sert the rocker bolt locations ?

Lance
Old 07-09-2017, 12:17 PM
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Originally Posted by Pantera EFI
Hi R8, understood.

Will you Time Sert the rocker bolt locations ?

Lance
heard you only need to do that when the ali threads becomes weak..

These were standard heads that had never had rockers removed so i would have thought they would be ok.
Old 07-09-2017, 03:38 PM
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Default GM LS engine = ONE TIME ONLY

Hi R8, the GM LS engine was designed to be assembled ONCE.

DO your self some good.

When you lose a rocker, you lose the Cam and Lifter unless you fit the OEM Tray.

Lance



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