Half resin filled

Ian Anderson · Post by **Ian Anderson** » Tue Mar 14, 2017 7:45 pm

Hi

A while back I bought a 302 block that I was going to put into the GT40

It was recently sent to an engine shop which advised the block was half filled with resin

Does anyone have any idea what this is done for as no doubt it will seriously effect the cooling of the block.

The engine builder says it is not usable in a road car.

Ian

Post by **katanaman** » Tue Mar 14, 2017 7:52 pm

short running drag race engine maybe http://www.enginebuildermag.com/2014/07 ... k-fillers/

Ian Anderson · Post by **Ian Anderson** » Tue Mar 14, 2017 8:50 pm

Cheers Marki
So a boat anchor it is!

Or a dodgy wine rack

Ian

Post by **katanaman** » Tue Mar 14, 2017 8:56 pm

Paint it silver add a bit glass and you have a coffee table. If your married then yes it's a boat anchor.

unstable load · Post by **unstable load** » Wed Mar 15, 2017 3:28 am

Sling it on FleaBay as an ex-drag bock awaiting it's resurrection and subsequent glory at the Pod.
Someone's bound to bite and get your money back for you.

Post by **Rossco** » Thu Mar 16, 2017 8:25 pm

If its been done correctly it'll have no effect on cooling.

90% of the heat generated is in the top 20% of the cylinder.

Do run an oil cooler though

unstable load · Post by **unstable load** » Fri Mar 17, 2017 1:06 am

Rossco wrote:If its been done correctly it'll have no effect on cooling.

Rossco, does that apply to a road going engine?

Ian Anderson · Post by **Ian Anderson** » Fri Mar 17, 2017 6:28 am

Cooling in a GT40 can be marginal at best of time.
Mainly to do with th 7 foot pipes to and from the radiator with the additional drag etc on moving the coolant and when slow you get no air movement around the block (good when it is batting down a track though)

So if anyone fancies a 302 block half filled there will be one hitting e bay soon
I think I may just stick with the bend over unit I have!

Ian

stevieturbo · Post by **stevieturbo** » Fri Mar 17, 2017 10:51 am

They do it to try and strengthen the block. But often as you say it's drag cars where cooling systems only need to run for short periods, or cars running on methanol etc, which by nature also run much cooler, so a loss of water in the cooling system is no big deal.

For a UK driven road car running at normal operating temperatures, I wouldnt be wanting a block like that. But it really does depend how much has been filled.

DaveEFI · Post by **DaveEFI** » Fri Mar 17, 2017 11:10 am

stevieturbo wrote:They do it to try and strengthen the block. But often as you say it's drag cars where cooling systems only need to run for short periods, or cars running on methanol etc, which by nature also run much cooler, so a loss of water in the cooling system is no big deal.

For a UK driven road car running at normal operating temperatures, I wouldnt be wanting a block like that. But it really does depend how much has been filled.

Are there any chemicals which could dissolve the resin without doing damage to the metal?

Post by **Rossco** » Sat Mar 18, 2017 8:32 am

There are plenty of filled blocks being used for road cars and in ambient temps well above what we get in the UK. It's cetainly not uncommon in the 455 fraternity.

It may as is being said be marginal in a GT40 but with a good oil cooler I'd still give it a go.

JP. · Post by **JP.** » Sat Mar 18, 2017 4:28 pm

Just sell that GT40 to me

I am happy with a RV8 in it.

In real, I am in for a GT40 for a reasonable price. Must be pre '87 registration.
Without registration or post '87 I am not interrested as its pain in the as and wallet to get that registrated in Holland.
No problem with a project, but don't want to invent the wheel again.
If you know one please contact me.

stevieturbo · Post by **stevieturbo** » Mon Mar 20, 2017 12:24 am

DaveEFI wrote:
stevieturbo wrote:They do it to try and strengthen the block. But often as you say it's drag cars where cooling systems only need to run for short periods, or cars running on methanol etc, which by nature also run much cooler, so a loss of water in the cooling system is no big deal.

For a UK driven road car running at normal operating temperatures, I wouldnt be wanting a block like that. But it really does depend how much has been filled.
Are there any chemicals which could dissolve the resin without doing damage to the metal?

Not actually sure what the makeup of the fill is...but it is often refereed to as concrete lol
So it sounds like it would be fairly permanent.

unstable load · Post by **unstable load** » Mon Mar 20, 2017 8:18 am

Lots of 2-pack resins are susceptible to weakening with heat, but it will probably take enough to cook the block and anneal it, so it looks like it's a sharpened screwdriver and a half-brick to chip it out....

SimpleSimon · Post by **SimpleSimon** » Mon Mar 20, 2017 5:29 pm

unstable load wrote:Lots of 2-pack resins are susceptible to weakening with heat, but it will probably take enough to cook the block and anneal it, so it looks like it's a sharpened screwdriver and a half-brick to chip it out....

So thats a NO then?