Indy Heads on 413?

Posted By: WV Runner

Indy Heads on 413? - 05/11/14 04:50 AM

I got an 71 413 industrial in a satellite, not the fastest car but runs great. I can get a real good deal on some Indy 440ez heads from a guy locally. will they work? be any benefit?

Posted By: Cab_Burge

Re: Indy Heads on 413? - 05/11/14 05:32 AM

Quote:

I got an 71 413 industrial in a satellite, not the fastest car but runs great. I can get a real good deal on some Indy 440ez heads from a guy locally. will they work? be any benefit?

Is it the 413-3 Industrial with the special heads, water pump and gear driven cam? If it is a passenger type 413 those heads should improve the compression ratio as well as the air flow

Posted By: WV Runner

Re: Indy Heads on 413? - 05/11/14 05:41 AM

its out of a truck, but the everything has been changed over to basic 440 parts, water pump, pullies, ect, it has a comp cam with double timing chain.

Posted By: mike s

Re: Indy Heads on 413? - 05/11/14 06:40 AM

Some of the IND 361 and 413's had steel top ring land inserts and the comp ratio is very low 7.5-8.0.Not sure the inserts would hold up well above 4500 rpm.While the heads would be a great addition,I think at least at set of light duty truck pistons would be in order.There are also issues with shrouding the valves with the small bore.You may need to notch them for extra clearance.

How far down the bores are the pistons?

Posted By: B G Racing

Re: Indy Heads on 413? - 05/11/14 01:12 PM

Check the crank flange for distance and bolt arrangment,some of the industrial engine differ from the automotive.

Posted By: buck440

Re: Indy Heads on 413? - 05/11/14 07:10 PM

don't the larger vales come close to the smaller bore?

Posted By: Cab_Burge

Re: Indy Heads on 413? - 05/12/14 12:08 AM

Quote:

don't the larger vales come close to the smaller bore?

They do on the M.W. heads, maybe so on the Eddy RPM also depending on cam lift

Not to hijack this thread but I just finished checking a 1976 OEM Dodge truck or motor home 440 motor, non 440-3 motor, and it has the pistons down in the cylinders -.263 on one side and -.276 on the other side, that computes to 6.63 to 1 compression ratio with the flat top pistons and 84 CC heads(someone had changed the heads and cam to a set of Eddy RPM and a Comp Cams 268 H cam) and a .039 thick head gasket with the stock bore and stroke

Posted By: JohnRR

Re: Indy Heads on 413? - 05/12/14 01:01 AM

Quote:

don't the larger vales come close to the smaller bore?

they will be very close on a 413 , smaller than a 4.25 bore , I think it's 4.1875

Posted By: cudadoug

Re: Indy Heads on 413? - 05/12/14 02:19 AM

and it has the pistons down in the cylinders -.263 on one side and -.276 on the other side, that computes to 6.63 to 1

YIKES! Surprised that's enough CR to get it started...LOL!

Posted By: Twostick

Re: Indy Heads on 413? - 05/12/14 05:00 AM

It must still have the dump truck pistons in it. I've never had one apart but if they resemble the 4 ring ones GM put in their 366 and 427 tall deck truck motors, I have seen the results of one too many trips to 7500.

Destroyed everything except 1 head and the intake and I think it had a scuff on the bottom from a rod that came up thru the valley.

Funny thing was it didn't come unglued until the drive back home. Just cruising along, a little vibration and BOOOM!!

Kevin