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Stroker engines - modifications of the cooling / gas supply

praesi

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Hi,

I am driving a 68 Road Runner with 4-speed and 489 rear end, engine is a 440 from 1978 without any modifications. I am planning for a mild stroker (440->505 or 400->470), street use only. Looking at the stroker engines build in this forum, did you also modify the cooling, the gas supply, the rear end?

Thanks,
Thorsten
 
I have a 440 based 493 and all I did is use a 3/8" fuel sender and line and a good 2 row aluminum radiator.
 
400 stroker to 512 here. No changes to cooling or fuel runs fine. Not a 440 though. Others here may have more info on that setup! Good luck!
 
My Satellite had an aftermarket aluminum radiator(2 row 1" wide passages), with a 500", 10.5 CR, EDE RPM heads. It ran below 180 in 95* and didn't get above 205 in 2 hours of crawl & roll in 95*, the back to 180 when moving. With my 512" 12.4 CR & Indy heads still has a hard time getting past 180. The fuel system is now 2- #8 out of the cell, wye to a #10 into 10" inline filter, #10 into the Mallory 140 pump, #8 and 1/2" line to the firewall into the regulator, #8 to each float bowl, with 1/2" return to the cell.
 
I run a 500" 440 based stroker 10.6:1 compression with aluminum Eddy RPM heads with a 3/8 fuel line and a stock carter fuel pump. I have the 26" radiator factory style from Glen Ray and it runs 185 all day long with a 180 stat in it. No issues whatsover.
 
I have 2 400 based strokers, 451 and a 496. Running 3/8" fuel lines, no return, and Carter 9603 pumps. Both radiators are the factory 22" models redone by Glen Ray with his max cooling setup. They both run 190 with 180 Stant Super Stats.
 
Many thanks for your feedback! During the restoration the radiator got a new core with four rows, fuel line is 3/8" and I am already using the 180 Stant Super Stat - good to see that there are no issues with different conditions in your bigger engines with more horsepower.

Do you still use the fan shroud or did you move to some electrical fans?
 
I have a 440 base 500 strkr I upped the fuel line added a regulator ,cooling is a standard 62 300 rad I had a 4 core conversion using the stock 4 blade fan and 180 thermostat never over heated ran 160 all day on the freeway
 
My Satellite has the 26" alum radiator, but the small opening, and a viscous clutch drive 5 blade fan. Also use an aluminum WP housing & pump, no stat.
 
A 180 stat should keep the temp above 180. If it runs cooler than stat temp the stat is not working properly.
 
The '71 Charger 500" stroker uses the stock 26" radiator, and the old Mopar performance water pump housing and pump, along with the Mopar Viscous fan package.
It has worked for years, but it really could use a better radiator.
Fuel supply depends on power level, fuel type, and fuel pressure.
When I was running a carb with E-85, I used -8 AN (1/2") fuel lines with about 12psi at the rear mounted pump and 6-psi at the by-pass regulator.
When I put EFI on, the pump and most of the lines are -6 AN (3/8"). The internal fuel pump in the fuel cell normally supplies 3-bar pressure (58-psi) to the EFI regulator when there is no manifold vacuum. The pump is capable of higher pressure if you run boost on the engine. I don't, the main change is the pump will require more power current as the pressure increases.
I do a few common mods to the oiling system. Enlarging (reaming) the main oil supply holes larger, cleaning up matching the oil pump suction side of the pump and block. Reaming the supply to pump passages to 9/16", and rounding the 90-degree intersection going to the pump.
I usually enlarge the oil pump pickup boss to accept a 1/2" oil pickup tube. If doing a mild lower reving engine, might not need it. The 500" engine will rev 7,000 RPM. It also has the Milodon low-profile oil pan (I think 7-quart capacity).
Many modifications depend on the power level and RPM more than just the stroke size of the crank.
 
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