Indy Aluminum block restrictor holes

[SUPERSTOCKRACER]

In the back of the block, I was finally able to remove the 2 -NPT 1/8" pipe plugs out of the back of the indy maxx block.
I'm trying to locate these restrictors to see what's back there.
I put a flashlight in there and don't see any restrictors.
My question is how deep are these restrictors in and would I see them right away?
1st time dealing with these Indy blocks.

 

[Hemirunner]

There aren't any in there. That's why you're having issues. With those 1/8 npt plugs, you're probably going to have to make your own. How far in is the intersection of the lifter feed galley to the primary supply galley? Make sure your restrictors go past that.

 

[SUPERSTOCKRACER]

There aren't any in there. That's why you're having issues. With those 1/8 npt plugs, you're probably going to have to make your own. How far in is the intersection of the lifter feed galley to the primary supply galley? Make sure your restrictors go past that.

I put a allen wrench which was about 3" all the way in and it bottomed out. I did feel something at that point.
What size restrictor do you think would help? .040

 

[Hemirunner]

.060 is pretty common, .040 might be a bit too restrictive if you're pushrod oiling. Can you see what's in there 3" in?

 

[SUPERSTOCKRACER]

From what I was told today. There isn't anything drilled or tapped in there from Indy. This is a total clusterphuck! I need bushed lifter bores, opened up valley oil drain backs and now restrictors put in.

 

[dvw]

Chris, are you push rod oiling? If so the standard Indy Max block has no provision for oil feed to the lifter.
Doug

 

[SUPERSTOCKRACER]

Chris, are you push rod oiling? If so the standard Indy Max block has no provision for oil feed to the lifter.
Doug

Yes I'm pushrod oiling and the indy block was drilled for hydraulic oiling right from indy.
My only mistake was NOT getting the lifter bore bushed from them before it was shipped.
I told Vignogna to bush it when he had received the block. He never did it. I pulled the valley inspection cover and he never opened up the drain back holes.

 

[Hemirunner]

What's the plan now? Open up the drain backs, install restrictors and go? Or bush it and forego the restrictors?

 

[SUPERSTOCKRACER]

What's the plan now? Open up the drain backs, install restrictors and go? Or bush it and forego the restrictors?

Not sure till I get it all disassembled. I'm going to put a drill on the oil pump tonight and see actually how much oil the valley is holding and see where the problem is.

 

[dvw]

Mines mega block is bushed. It also push rod oils. It also had low oil pressure when first built. The fix was restricting the oil holes in the push rods themselves. They were .095. I sleeved them down to .040" each. Also Comp 829 lifters have huge oil feed holes to the pushrods if you are using them. Iskys are much smaller.
Doug

 

[SUPERSTOCKRACER]

Mines mega block is bushed. It also push rod oils. It also had low oil pressure when first built. The fix was restricting the oil holes in the push rods themselves. They were .095. I sleeved them down to .040" each. Also Comp 829 lifters have huge oil feed holes to the pushrods if you are using them. Iskys are much smaller.
Doug

I'm running Comp Elites. I also run TREND tapered pushrods. I'm wondering what size hole they are?

 

[SUPERSTOCKRACER]

I'm running Comp Elites. I also run TREND tapered pushrods. I'm wondering what size hole they are?

Called TREND today and they are a great company to deal with. Their pushrods have a .100 hole for pushrod oling.
They might redo mine to .040 or make me up another set. Mine are thick wall .0165
This might be my fix without having to redo everything.

 

[dvw]

Called TREND today and they are a great company to deal with. Their pushrods have a .100 hole for pushrod oling. How about transbrakes? I don't recall any of those, either. Or Racepack computers? Or 4 links?
They might redo mine to .040 or make me up another set. Mine are thick wall .0165
This might be my fix without having to redo everything.

Same issue as me. It wouldn't hold 40 psi@7000. Do the math. Normally w/o push rod oil guys run .040"-.060" on each bank. You have 16 .100" holes. The area of two .040" holes is aprox .0025sq/in. The area of 16 .100" holes is aprox .1257 sq/in. That's more than 50 times the same area. Its like your engine having an aneurysm.
Doug

 

[SUPERSTOCKRACER]

Same issue as me. It wouldn't hold 40 psi@7000. Do the math. Normally w/o push rod oil guys run .040"-.060" on each bank. You have 16 .100" holes. The area of two .040" holes is aprox .0025sq/in. The area of 16 .100" holes is aprox .1257 sq/in. That's more than 50 times the same area. Its like your engine having an aneurysm.
Doug

So when you crossed the stripe at >40 psi how did your rod bearings look? Were your mains ok?
I'm going get mine on the engine stand after I pull the pushrods and check them. I hope none of mine are fried.

 

[dvw]

Mains are still in the motor after 250 passes. The Rods were "shiny" but otherwise undamaged (15 passes). I did replace them. Also still in the motor after 235 passes. Both were checked at 200 passes and looked very good.
Doug

 

[SUPERSTOCKRACER]

Mains are still in the motor after 250 passes. The Rods were "shiny" but otherwise undamaged (15 passes). I did replace them. Also still in the motor after 235 passes. Both were checked at 200 passes and looked very good.
Doug

How many passes did you make with the low oil pressure? I only made 2.

 

[dvw]

Around 15

 

[SUPERSTOCKRACER]

I found a 1/8 NPT pipe plug right if front of the valley going into the distributor drive area and timing cover area.
Someone said to take that plug out to get some extra oiling to that timing chain area and that could help a little drain back too.
Any truth to this?

 

[Hemirunner]

Post a picture. If that has a plug in it, it's more than likely a pressurized oil galley and taking out that plug would be the last thing you'd want to do.

 

[SUPERSTOCKRACER]

Post a picture. If that has a plug in it, it's more than likely a pressurized oil galley and taking out that plug would be the last thing you'd want to do.

Ill get picture tomorrow. Why would they drill a hole in that spot anyway and tap it and put a 1/8". I'm running a vacuum pump also.