What will it make?
 

Time to play what will it make (im putting the thread in street section because it will see quite a bit of street use)
4.250 stroke 4.380 bore
11:1 pump gas
Wide port e-heads ported by Butler touched up by SD flow [email protected] 2.250in 1.74ex (bought used).
Used ported Victor (somewhat matches heads)
1150 carb setup for pump gas
269-276 .750 112l/s cam
2 1/8 headers.
Hope to have it on dyno soon'ish

750 Hp with similar torque numbers at least.

Hmmm. Seems most to all would have missed on that 350 the other day. ;)

I venture a guess of 789 HP and 725 torque

I'll go 738 HP and 760 torque.

865 if I fix the heads

If? You need to get on it, time is running out.

512 cubic engine. 810 hp 750 torque.

Five years later and now all of the sudden you are in a hurry. Funny!

I'll have them done before you can get pushrods!

Correct because i need the heads to measure for pushrods length :cool:

What size or Diameter push rod are you going with? Thanks

Biggest that'll fit. Won't know until we get everything bolted together. But absolute minimum will be 3/8 thick wall which due to supply chain issues are really hard to get right now.

904 HP @ 6500 rpm


:)

810 hp

855 with a small splash of Q16.....lol

What do you mean by saying that the intake somewhat matches the heads?
I could deal with the interface at the flange being somewhat smaller since that is a straight run and it does not even take the area of a wide port to flow 370 cfm, but you for sure need a good amount of added port area from the point in the manifold where the runners turn hard and from that point on up to the intersect of the runner and plenum.
I going to go with a what I think is a generous 770 hp , especially in light of only having 11 to 1 compression.

There is power to be had by deliberately mismatching the intake runners at the gasket flange on certain combinations.

Are you talking about having the bottom of the intake port a bit higher than the start of the heads so the air/fuel has a little ramp to jump off of.

No Sir

I have heard that works too.

Is this the old HO Racing thing with the manifold hanging over the port by the pushrod bulge and moving the other side by the same amount in an attempt to shoot past it ?

I have everything to assemble this engine except pistons. Still waiting on those. This hobby sure has gotten hit hard over the last 2 years. Just can't seem to get anything any more

Did you get your Jesel lifters?

Yes, thank you

Ordered pistons Jan 17th, got them yesterday. Just crazy. Now just need to balance it and assemble it.

Taking way longer than I expected. But short block is going together. Heads are just need assembled and they'll be ready. There is a light at the end of the tunnel finally.
Once this one gets done then we'll start on the big Tiger2 headed engine for Drag Week competition

My pistons took 16 weeks

Do you already have the Tiger heads?

When I talked to Frank a couple months ago at the last Pontiac race we attended, he was telling me he's having a hard time finding someone that will cast the heads the way he wants. Or worded something to that affect. In other words they are either in short supply or not available right now, like pretty much everything else these days.

Yes I have the heads. Kind of crazy just how bad things have gotten. Everything seems to take forever to get.

look great any new flow numbers?

I'll guess
 

Looks like a great combination, should be very responsive and will make excellent power. I guess 815 HP @ 6800 and 705 TQ @ 5000-5200 tested with 91 octane on a day that has decent air.

It better make 850 lol

Pretty much same as when you sold them to me. Just touched things up some.

I'm not holding my breath for that, but would be nice.

Been a while but getting pretty close now. Waiting on pushrods and then top-end will go on. Compression is right at 11.1:1 so should cruise nicely on 92 octane. Then dyno time.

Looks Good!

Dynoing sometime in next 2 weeks.

Good luck

Oil and water don't mix :(

Head gasket?


:confused:

Sux Brian. What kind of head gaskets did you use ?

Well that's a bummer!

Leak is where we drilled an oil return. Why on earth water is there is beyond me.

That is kinda weird. I have the same holes on a set of E heads Dave did for us and there ok. Hmmm. There would almost have to be a crack in the casting in that area. Sorry to see this happen to you. Did you actually get any dyno pulls?

Maybe pushed it a little to far placing the hole low enough to get every drop of oil out. Threads go all the way to spring pad.
What is the fix ? Welding that hole up and placing the return further forward between the springs ?

Just tapped the hole deeper and ran the fitting in further to cover the hole.

Sadly we only got about 1min of idling in before we found the issue (which good, saved the bearings).

run couple of the AC Delco radiator pellets thru the engine.We do it on EVERY engine will build on the startups.Tom

Sounds like a good repair. Does seem awfully close to hit water though. Figure Chevy head bolts go into water and the sealant works on them. If you take a 409 head for screw in rocker studs you had better use it too.

Finally!!

Nice job! Great numbers