after installing my indys on my 440 with the outside oiling for the heads i notice my oil pressure is down a lot was 65+/- @ idle, now about 28 +/- @ idle..is it necessary to install a reducer in the oil line to restrict the flow to the heads??? i don't want to empty the oil pan @ 6500 rpm!! or is this normal..when i up the rpm in neutral the pressure comes up to around 60lbs@ 2500 rpm..its all new, i don't need to lose it..thanks in advance

yes

I have a #70 jet size in mine

where would you install a jet??

the two oil line fittings that are on the heads

drill and tap them on the back side

there is room for them in the heads

I do not remeber the drill and tap size but get a holly jet and you need to tap it at that size


someone else should know it too

everyone has their own cure to fix this problem. mine is a very low $$ cure. i sandwiched a 1/4"copper flare cap between the flare fitting on the head & the flexi hose connection. i drilled a hole in these caps to 7/64" & my low press while hot @ idle has gone. these caps are used in the refrigeration industry & cost me 10 cents. you can try a smaller hole if you desire as it doesn't cost anything to enlarge them.

so you pull the fitting out and tap the rear of the fitting and reinstall??!! sounds pretty simple, just like me!! will give it a go....thanks a bunch!!

Anything with a hole size roughly 0.062" or so.

Remember that Holley jet is an extra-fine thread 1/4-32 (fine is 1/4-28, and coarse is 1/4-20. So get the right tap.

You can also use a nitrous fitting and a nitrous jet.

Are all Indy's like this?
My SRs never gave me any low oil pressure at idle or low speeds. SR's have external oiling lines also.

If I wasn't experiencing any low oil pressure problems, than was I over looking another problem with good strong pressure and or flow at the heads?
Cold starts would be at 70-80 pounds, warmed up and at highway speeds 40-60 pounds. 25-30 at curb Idle.

my sr,s on my street car never give me a prob and my ez 325,s on my race car work great too with no ristrictors.

Indy has new ownership?

eddie? as in elvis eddie? 1fastmopar? really? maybe there will be hope for indy products yet!

Thanks for the info and pictures on this guys! This is why I love Moparts. I was just putting together my motor yesterday and while pre-oiling I realized I had too much oil going to the head so I posted a question on Moparts and within minutes I had good useful info and a link to this thread. (First set of Indy -1s so I didn't know this was necessary)

Using the Holley jet was what I was thinking about and you guys confirmed it and 440Jim had pictures (of course...) Problem solved, motor installed, fired up, Cam broken in and ready for the '09 season!

I didn't have any spare #70s so I used a #74,it's close to .080 but that's still way better than an unrestricted #4 fitting.

I didn't have a 1/4-32 tap and couldn't find one on Saturday but I had an extra fitting and tried a 1/4-28 tap and it worked just fine as well. The jet started and made about 1 1/2 turns and then got a little snug, but since it won't be coming out and getting stuck is a good thing I just put it in the vise and used a good sized slot screw driver and it went right in (used lock tight too).

Thought I'd share that because most of us will have 1/4-28 taps but 1/4-32 taps can be hard to find.

Great Info Guys!