engine mounts and sump- SBC into EK...

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Andrew R
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engine mounts and sump- SBC into EK...

Post by Andrew R »

Hey guys, im taking delivery of a 307 soon for my ute, and i'm wondering where people have located the engine mounts/pedestals on their HR crossmembers. Im going to be using CRS headers with the cutouts through the inner guards, and was seeking some measurements/ ideas. Also, do I need to cut and notch the crossmember for sump clearance at all?

Cheers,
Andrew
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BILLY BLACKARROW
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Re: engine mounts and sump- SBC into EK...

Post by BILLY BLACKARROW »

I am putting a 305 chev in mine. If it's a front mounted rack you need to have a cut out in the cross member so the engine can move in case of an accident I will post photos of my set up tonight along with the cut outs in the guards they also have to be reinforced around the cut out I also had to do some minor alteration to the fire wall on the drivers side "you cant even spot this" but i needed clearance between the head and fire wall. All these are for rego reasons. As for the engine mounts i will take photo of them maybe you will be able to tell from it.

BILLY :arrow:
BILLY BLACKARROW
MY Father always said do the hard part first --because when you are OVER IT you only have the easy part left to do THINGS I HAVE TRIED TO LIVE BY
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Harv
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Re: engine mounts and sump- SBC into EK...

Post by Harv »

Andrew,

I'm not sure how much of the CRS chassis kit you ended up with for the V6, but the following may help. It's a description of the CRS kit as applied to V8s (in this case the 327 in my EK wagon).

The original engine weighed some 374lb (170kg), whilst the replacement SBC engine will weigh approximately 350kg. The increase in weight is some 180kg, representing an increase in mass of approximately 16% distributed primarily on the front axle. The front crossmember and associated suspension and stub axle assembly will however be replaced with that originating from a General Motors Holden HR. The HR Holden model front cross member and associated suspension and stub axle assembly was designed for a maximum weight of 1280kg (Premier Station Sedan), representing an increase of 100kg over the heaviest EK Holden (the Special Station Sedan at 1182kg). Additionally, the front crossmember and subframe assembly has been strengthened by the Castlemaine Rod Shop (part numbers FE02 and CHASS 10 KIT) in the following manner:
a) addition of steel plate along the bottom face of the crossmember. The crossmember has been fitted with a depression to allow clearance of the V8 sump and a notch to allow the steering rod to clear,
b) addition of steel rod along the leading and trailing edges of the control arms,
c) addition of steel plate along the underside of the front subframe K-arms,
d) addition of braces between the front subframe and gearbox crossmember,
e) addition of ¾ chassis rails from the gearbox crossmember to the rear spring hangers, and
f) addition of a tailshaft safety loop.
Documentation supplied with the above chassis kits indicate that the front axle load is suitable for a maximum of 850kg.

I note from your other posts that your rack conversion was done by your Dad (cool job... way beyond my ability to build a rack conversion from scratch). For the curious, the CRS rack conversion also has the following limitations:
a) The maximum static fully laden load on the front axle assembly must not exceed 850kg, with a maximum track of 1455mm with a maximum rolling radius of the tyre of 350mm.
b) The location of the rack housing on the front crossmember, the front wheel diameter, and the location of the compression and rebound bump stops must be located in order that the tie rod ball end in the rack still retains some movement after maximum suspension oscillation.
c) The front wheel scrub radii do not exceed the original manufactures specification by more than 6mm. The use of large outward offset on wheels are not permitted, as this will unduly overload the front stub axles and create a high steering load which could result in steering component failure. All of the manufacturers castor settings for the front suspension are to be maintained.

Billy's right, you will need to massage the drivers side firewall with a BFH to allow for clearance of the cylinder head... it only just clashes. Sorry for the lack of phtos/measurements - I'm on the road for work.

Cheers,
Harv
327 Chev EK wagon, original EK ute for Number 1 Daughter, an FB sedan meth monster project and a BB/MD grey motored FED.
Andrew R
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Re: engine mounts and sump- SBC into EK...

Post by Andrew R »

Thanks for the replies guys! The HR front end was all built by Dad (mechanic with over 35 years experience), however there was (as far as I can tell) no strengthening modifications done to it, as it was only going to be a V6 or straight six. I will liaise with an engineer as to what is needed, but if I need an entirely new front end built I'm gonna be just a tad upset... or maybe CRS can modify mine for me? The only other CRS part/modification on the EK is the trans tunnel we put in.

I have the CRS chassis kit, which from what I can tell from the pics, is the same as the strengthening kit as used for the V8s- I honestly cant see how its not suitable- my ute is so insanely rigid now, makes my dad's chev look all floppy in comparison.

Any crossmember pics anyone has would be most appreciated.
Mick
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Re: engine mounts and sump- SBC into EK...

Post by Mick »

i've done 2 V8 conversions and know of a few of others done all not useing kits and never has an engineer asked for any of the srtengthening of the front end or the cut out, not saying it's a waste of time just that we've never been asked for it
sometimes yor just better off shitting in yor hands and clapping

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Andrew R
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Re: engine mounts and sump to EK...

Post by Andrew R »

Mick- yeah I reckon most of the FE-HR's here in Canberra with V8s in them would be running standard HR crossmembers with no other mods other than engine mounts... maybe i'll have a chat with an engineer firstly.
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BILLY BLACKARROW
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Re: engine mounts and sump- SBC into EK...

Post by BILLY BLACKARROW »

Andrew this is the 3rd time I have tried to post pic ########Bloody Photo bucket

Crossmember

Image

Image

Extractor hole

Image

Image

Image

Image

You will have to compare this to your fire wall as I didn't do it but looks as though it is meant to be like that

Image

I also had to alter it here for the uni

Image

Hope this helps

BILLY :arrow:
BILLY BLACKARROW
MY Father always said do the hard part first --because when you are OVER IT you only have the easy part left to do THINGS I HAVE TRIED TO LIVE BY
Andrew R
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Re: engine mounts and sump- SBC into EK...

Post by Andrew R »

Billy- those pics are awesome mate, jsut what I needed. Thanks heaps!!
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