[Chris Uratchko]

LOL... yeah pretty much.

[Stan Weiss]

If the air foil (push rod) in the middle of the intake port works out, then how much help does the lift, push rod, rock arm dynamic need on a short deck block?

Stan

[twinturrbo406]

Originally Posted by Stan Weiss

If the air foil (push rod) in the middle of the intake port works out, then how much help does the lift, push rod, rock arm dynamic need on a short deck block?

Stan

... well from a reverse-engineering perspective, it appears that's what led to the Tunnel Port/RAV layout because the pushrods are virtually straight up and down, so less deck height wouldn't be a problem, and during the era' this layout was developed the focus was short deck, small c.i. TransAm road racing, so it's easy to see what the factories were after then, large csa ports with straight valvetrains ...

[Ken Criss]

Call KRE they are the only ones that I know that have done it with Picketts 428 and track results back it up with 8.0"s in quarter mile.
Ken

Originally Posted by dci

I seen here were Scott asked if anyone has made 2.3 HP per cube. My question is. What does it take to make 2.3 or more HP per cube? I want to clarify first I have not made 2.3 HP per cu. in. So I am not asking this to offend anyone.I just want to see what others have done or might think it takes. I think to make 2.0 HP per cube takes way more than the average guy is willing to spend or to make the effort to achieve. I have been fortunate enough to have seen some of what it takes to make 2.8-2.9 HP per cube in pro stock, and let me tell you. I do not have the funds or time to dedicate to such an endeavor. It gets way more involved at this level than I think most realize. Let's see what everyone's thoughts are. Let's use a 500 cubic inch limit with our current deck height of 10.240" and the cylinder heads that we have available right now. There are no limitations except the two I just mentioned. If the engine is capable of making a minimum of 2.3 HP per cube. Then this theoretical engine will make 1150+ HP. Let's not turn this into a cylinder head pissing match. I don't care what heads are used to achieve this goal. I just want to get people together to brain storm. We have some really smart guy's here and I think this will be of interest to everyone from the amateur racer all the way up to the professional level engine builder


Don Johnston
DCI MOTORSPORTS INC.
330-850-5050 shop
330-628-3354 cell
Designer of the DCI Tiger Heads and the NEW DCI Ram Air 5 Heads !!!!!

[mjm421]

Originally Posted by Ken Criss

Call KRE they are the only ones that I know that have done it with Picketts 428 and track results back it up with 8.0"s in quarter mile.
Ken

Weight and MPH needed.

[tom s]

I believe he went 8.30s at Norwalk at 6.5 per CI last year.Dont know what he weighed at the 8.0.Tom

[slowbird]

He qualified with a 8.31 at 163.45 weighing around 2780lbs. Which shows 950hp 2.2hp/ci

[mjm421]

Originally Posted by slowbird

He qualified with a 8.31 at 163.45 weighing around 2780lbs. Which shows 950hp 2.2hp/ci

Thank you sir!

[LiL Jack]

Originally Posted by slowbird

He qualified with a 8.31 at 163.45 weighing around 2780lbs. Which shows 950hp 2.2hp/ci

Stop it with the facts, this is the internet damn it everything posted is the truth!

[johnta1]

At least one can't go 'dark' with that fact.

[mike leech]

Originally Posted by johnta1

At least one can't go 'dark' with that fact.

unlike you.....Who can go "dumb" with any set of facts.

There is not enough light that can be shown that would be bright enough for you to see it.

[johnta1]

unlike you.....Who can go "dumb" with any set of facts.

There is not enough light that can be shown that would be bright enough for you to see it.

No, unlike you, when you can't sway anyone with your 'facts' you deflect or resort to childish antics.

[taff2]

I'm hoping to be somewhere close to 2 HP per cube @9000 rpm on the 400 I'm building for my sons car,but it's going to have a factory block and factory iron heads with a 'special' port job. Don't want to make it too easy with all this fancy aftermarket stuff!

[LiL Jack]

Originally Posted by taff2

I'm hoping to be somewhere close to 2 HP per cube @9000 rpm on the 400 I'm building for my sons car,but it's going to have a factory block and factory iron heads with a 'special' port job. Don't want to make it too easy with all this fancy aftermarket stuff!

9,000 RPM with a cast iron head?

[BruceWilkie]

Originally Posted by LiL Jack

9,000 RPM with a cast iron head?

Why not? HO was doing around that rpm in the 70's! Today's parts and porting techniques applied to old iron 2 per seems a doable goal..

Sounds like a plan to me Taff!

[LiL Jack]

Originally Posted by BruceWilkie

Why not? HO was doing around that rpm in the 70's! Today's parts and porting techniques applied to old iron 2 per seems a doable goal..

Sounds like a plan to me Taff!

Sure, you can shift it that high, but it probably stop making power under 7,000.

[taff2]

Or as close to 9000 as we can get. Obviously the heads will be seriously modified,I'm going to mill out the head port divider wall right back to the head bolt boss's to make one large 'siamesed' port that will tune at up around 10,000 rpm,then they will have a max port job, and then the intake manifold will have the same treatment. (similar to what I've done on my turbo combo,which works pretty good as far as fuel distribution goes). Compression will be up around 16-1 with all titanium parts up top and a super light rotating assembly. No it won't be on pump fuel, and yes it is going to be a challenge!

[Dragncar]

Jack, HO was doing that with a 326. But it was not a normal 326. It was a 50s block with a very short stroke and those real small mains. Factory modified forged crank. RAIV heads.
They modified a sbs Edelbrock two four tunnel ram.
You can bet it pulled well past 7000 RPM.

[slowbird]

Did they dyno it? Where someone chooses to shift at and where an engine makes peak power at are two completely different thing.

[cfmcnc]

Working on the AP 541Tiger Development engine we have got to 2.105 HP-CU with valve seat leakage,broken valve springs and rods to close to oil pan,Hate to do the shudda-cudda-woudda thing but we think when we get a solid engine it will be at 2.2+.Dont think 2.3 will happen with this combo .Engine has 2.350-1.670 valve size,1.040 net lift on int.15.2 cr.Peak HP at 8200rpms,This engine does not have all the Max Effort stuff available ,Just a development tool to evaluate Tiger heads and other AP products.Bill C.