main cap bolt tensions

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main cap bolt tensions

Post  werneil on October 5th 2012, 7:04 am

have started to put our eliminator604 together, as we obtained this block 2nd hand , still unused, with no touque/tension specs. any advice on crank cap tensions would be a great help, we have replaced the No1/No5 cap outer bolts with studs, we are running 6thou main bearing clearance and planed 80psi with 25w/50 . any advice is more than welcome

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Re: main cap bolt tensions

Post  cooter on October 5th 2012, 8:41 am

Cant help with the torque but 6 thou clearance, i assume thats a misprint?

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Re: main cap bolt tensions

Post  Paul Kane on October 5th 2012, 11:06 am

werneil wrote:have started to put our eliminator604 together, as we obtained this block 2nd hand , still unused, with no touque/tension specs. any advice on crank cap tensions would be a great help, we have replaced the No1/No5 cap outer bolts with studs, we are running 6thou main bearing clearance and planed 80psi with 25w/50 . any advice is more than welcome
It's likely that someone here will have the torque specifications. If not, you can always contact Eliminator Products via telephone or through their website.

Assuming your rod clearances are also along the lines of your posted main bearing clearances: 20W-50 won't be adequate and most people running such high horsepower engine programs with similar bearing clearances are using engine oil coctails that historically have been single-viscosity 60-wt or 70-wt.

Paul
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Re: main cap bolt tensions

Post  Frank Kramer on October 5th 2012, 3:06 pm

main studs 1 to 5 125 lb/ft
side bolts 2 3 4 105 lb/ft
side bolts 1 & 5 90 lb/ft

Max clearance that I've been running is .0045 to .005 with a 70 weight oil

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Re: main cap bolt tensions

Post  Wheelie58 on October 6th 2012, 2:44 pm

I just scoped out the Tech sheet that Eliminator supplies with the blocks.

They call for 110 on the 1/2" studs - inner......80 on the 1/2" outer bolts and 60 for the 7/16" outer bolts on the front and rear. This is with oil.....

The 6 thousanths seems a little on the loose side. We typically like them closer .004"

If you need a scanned copy of the sheet, send me a PM
Thanks,
Keith
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main cap bolt tensions

Post  werneil on October 7th 2012, 9:19 am

thank you very much for your replies, any and all advice is appreciated , and yes i stuffed up on the oil. not 25w/50 but 40w/70 !

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Re: main cap bolt tensions

Post  dfree383 on October 7th 2012, 10:29 am

Whats the use for this engine?
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main cap bolt tensions

Post  werneil on October 7th 2012, 10:48 am

this new engine is for my younger brothers low 10sec 68 f100, he pays the bills i'm the mechanic

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Re: main cap bolt tensions

Post  dfree383 on October 7th 2012, 10:51 am

werneil wrote:this new engine is for my younger brothers low 10sec 68 f100, he pays the bills i'm the mechanic

You need to reconsider your clearances on that kind of application.
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