Mondello Tiger Head CNC Upgrade
 

We just completed port development on the "Race Ready" package standard port Tiger head. For discussion purposes and the variations in flow bench data, the following information is the actual increase in CFM from the baseline head. The port CSA is about 2% larger, the goal was to improve mid lift airflow.

Intake lift / CFM Gain
.100 +5
.200 +12
.300 +11
.400 +11
.500 +21
.600 +21
.700 +26
.750 +33
.800 +19
.900 +15

Exhaust lift / CFM
.100 +22
.200 +20
.300 +22
.400 +28
.500 +29
.600 +18
.700 +19
.800 +21
.900 +22

The package uses the standard 2.250" intake valve, 1.800" exhaust valve in the standard valve location. Port velocity is increased to achieve strong low to mid lift numbers while keeping the port size to a minimum. I've attached port mold pictures below, the new port is the one on the right.

The cost for this upgrade is $1,485.00.

Calvin Hill
Hill Performance / Mondello Tech Center
708-250-7420 / 931-459-2760

How much did you raise the floor? Looks like its raised a decent amount

those looklike good improvement, do you have a cnc program for any iron heads ?

It is nice to see actual numbers as well as port shapes.

Looks like you and your crew have settled in nicely at Mondello. I can only wait to see what other developments come out of your shop in regards to the Pontiac market.

I paid a visit yesterday. All I can say is if you are a Pontiac enthusiast or any brand for that matter this shop has a lot to offer! There will be some nice stuff showing up in the future. A bunch of things already developed to meet and exceed anyones needs. It appears new products may also show up that will benefit us as well.

A big thumbs up to Calvin and his staff.

Intake development
 

Any one working on an Intake for the Pro Port Heads??? I think Wade at BOP had mentioned something maybe coming in the new year. We will definately need some development on Intake choices for all the new port designs that are coming out. Nice port moulds on the Tiger head.

Calvin,
Nice shaping...those should work out great. If you raised the floor did you weld it up or? What is the cross section area at the pushrod on your port? What is the actual flow volume (cfm) at .700 lift on your intake port?
Thanks

Jim,

We raised the floor about .125 with epoxy, moved the port over about the same. I don't have the CSA data with me, peak air flow was just under 450CFM on a 4.375" bore.

If you look at the short turn, you can see how smooth the transition is as compared to the as cast port.

Thanks.

Calvin Hill
Hill Performance / Mondello Tech Center
708-250-7420

Calvin - -Did you find the numbers that you got prior to your work - -your baseline -- similar to the advertised numbers for these heads ??

Very nice work Calvin..
IIR the CFM on my Tigers I got from AllPontiac/Cerelli with same valve size/location flowed like 412 @ .750..so +33 is right there..Glad to hear velocity mentioned...
If I ever go to a 535 CI I might be in the market..

Would love to visit your new shop sometime..
See ya at Norwalk

Very nice work Calvin! Will these heads require more offset on the intake rockers since you widened the port? Any idea how much $$$$ to modify the Tiger intake manifold to match?

These heads came with flow data, the numbers were close to what we evaluated on our bench, also inline with what Troy said, within 2%.

Calvin Hill
Hill Performance / Mondello Tech Center
708-250-7420

I've always liked the Tiger heads and felt that they are the ultimate all out classic inline race head but even though I've entertained the thought of putting a set on a serious street car I also realized it wouldn't make any sense unless you run .800 inches of lift or more to maximize the heads potential. ( which kinda throws the street part out the window.....) Thanks to Calvin Hill and Bill Anderson's port modifications we now have a "streetable" Tiger that flows over 440 CFM at around .750''-800" with strong mid flow numbers to boot. I've been told by a reliable source that the CSA went from 3.55" to only 3.61"!! So here is my dilemma....... do I buy a pair to put on a 535 inch Pro Tour/ Texas Mile 72 Firebird and then use my ported CV-1 heads on a future drag build or should I hold out and see how the new Edelbrock Pro ports turn out. :confused:

440cfm @ .750 is moving some air. Wish my heads did that.

Milepost, that's the exact engine in my stock looking 69 firebird street car. 535, ported tiger heads, and custom intake manifold low enough to close the super 400 hood. yes, it has .800 lift with 264-270 duration on the comp cam. 11.1 comp. I just took it for its first ride, and untuned, it feels as fast as my procharged 80 formula. The 80 formula puts down over 600 HP and torque to the ground, so I'm using it as a gauge. Will hit the chassis dyno in a month or two to tune it.

Thanks to Dave Wilcox for the beautiful port work and CVMS for assembly.

Steve

65 NSS, thanks for the time and effort you guys put into these projects. We ( Pontiac people)now have no excuse not to kick Bowtie Butt, at least on the street classes and lower level racing. Now the rest of us have to get off the computer and start stroking checks to all you guys and buy the real good stuff and keep you in business.

Steve

IMO There is a lot going for the Tiger heads over the Edelbrock Pro-ports. They are a proven power maker. They are AVAILABLE right now! The head is rolled over to 12 degrees which keeps them legal for sanctioned racing classes that require no more than a 2 degree change in valve angle. The 11 degree Proport won't fit within those rules. There are 460 + CFM programs already developed for the Tigers and Allpontiac has a great intake manifold developed for them. No way the old Victor manifold will be able to match the the capabilities of a 460 CFM head. Sheetmetal manifolds.... $$$$$..... aren't legal in many classes and if they are you get hit with a weight penalty if you do run one. I can't see how the 11 degree Proport head with its shorter valves can come close to outflowing the Tigers. The 12.6 degree head won't even come close.... It may sound like I'm slamming the E heads, but I'm not. I'm sure the casting quality will be great and I really like how Edelbrock have addressed the cooling and oil drain back issues. I just can't see how they can compete with the likes of the Kauffman High ports or the Tiger heads at a competitive price. Many thanks to Calvin and his crew at Mondello Performance for giving us a what may be the ultimate hardcore Pontiac "Classic style" street head.:usa2:

Awesome build Steve! I'm curious how you addressed the manifold height/ hood clearance issues. BTW How do you like the super 400 hood? Any chance we can get you to post some pics of your beast?

Correction...my .750 lift CFM is only approx. 392 not 412.....My memory sux..Sorry ...found flow sheet.:rolleyes: My heads are also a set of "early" heads. They were flowed in '07....Not sure what a set of newer Tiger's flow...
Don't want to mislead anyone...
Keep up the good work...

When I compared our numbers to what was provided, ours were a bit lower (2%).

Troy,

Hope all is well, glad to know the year turned out well for you, see you at Norwak and lets hope we can line up our barges and have some fun!

Calvin

Thanks Calvin....my old body endured a lot last year but I am told I am on the mend now..Been working on car some to help the spirits..:D I would love to line up with your Dad's 59 . Hopefully I won't get spanked too bad !!:) No matter...it's fun.
CYA @ Norwalk ....

I'm sure Calvin will correct me if I'm wrong... I got a chance to see these the other night, it didnt look like it would require geometry changes.

I agree with your "classic inline" evaluation. Edelbrock including the Pro Port may end up better suited for "classic inline" applications that arent biggest bore maximum rpm combos. I see best advantage of the Pro Port is custom tailoring to an application. Time will tell though. Its not inconceivable that someone meets or beats the Tiger with a Pro port... just seems less likely. Keep in mind a few years ago it seemed quite a stretch to think a std Edelbrock could hit 350 let alone to where it is now.

There are some very talented people amongst us always looking to raise the bar. Put politics and loyalties to the side and reflect on just how far we've come from a strictly technical viewpoint.... truly amazing.

And... thanks for making a very overlooked distinction... "classic inline" vs the other options we have available.

Milepost, Here are the pictures of the Super 400 hood, the sheet metal
metal intake manifold and the water crossover. I built the manifold out of .100 aluminum and 1/2" plate stock for the flanges and made the crossover to kinda match the sheetmetal manifold. I have not tested the manifold yet so I don't know how well it will work but it does all fit under the hood. I have alot of money in the hood so I was not going to cut it up.

Steve

Nice work Steve! You definitely have some fab skills. BTW That super 400 hood looks awesome. I wouldn't want to cut it up either! Too bad there isn't something similar for 68-70 GTO's!

... yes, the velocity was a very important part of what we were looking for with the new shape, the port has a very nice speed and even port map now, you can really hear the difference, we cant wait to get this top end on something ...

Bill: I also noticed you picked up the exhaust flow quite a bit too. Have you considered something similar to the raised and shortened exhaust port that is offered as an option by All Pontiac to squeeze a little more flow out of the exhaust side? As an added bonus, I understand, it makes porting the exhaust that much easier to accomplish & decreases mill time on the CNC machine?

... as of right now, we dont have a set of those heads in the shop, but i'm sure as soon as a set shows up Calvin would love to see what could be had from that type of exhaust port, myself included ... Calvin's original plan of my work on the Tiger heads was to see how much improvement we could get for the most economical price ...

We know there is more gain in changing the valve location as we spent some time in development. The goal here was to increase the port speeds at mid lift and design an upgrade that can be used by other racers without "reinventing the wheel". Our goal for this engine is a 75HP to 100HP upgrade while maintaining the same cubic inch.

Calvin Hill
Hill Performance / Mondello Tech Center
708-250-7420

My Tiger head design still has allot left un discovered, and guy's like Calvin are just starting to bring it out. This head was designed with allot of room for diversity and I'm glad to see that some are tapping it. I have a prototype from way back in 2003 that I used for R&D that has several different port configurations. Some of you might remember seeing it at Norwalk or in the article HPP wrote when I first started showing it to the public. One port is the as cast that was tested for the article that flowed 422. Another port is a max effort port that flows 480 cfm with a 2.350 valve. Another is a port very similar to what Calvin has done (not as wide) that flows 440 with a 2.250 intake valve.

Nice work Calvin, glad to see you playing with some Tiger's.

Happy Holiday's to everyone!!!!

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

Has anyone outdone a set of Tigers done by BES yet?

Nope.

What does that have to do with this post?

Calvin Hill
Hill Performance / Mondello Tech Center
708-250-7420

... wow, that's a big pair of shoes to fill ... :eek: hummm ... i wonder what $1500.00 will do for porting vs $20,000 ?? yeah, that's fair ...

dunno

Its not 20k.

"that guy" in Floriduh can get well above 450 CFM pretty easily and cost effectively.

But then again I never raced a flow bench.

... hold on Jack, did BES move to Floriduh ?? ... make up your mind ...

I thought the heads you just bought from Langer cost over $20k to duplicate????

Calvin Hill
Hill Performance / Mondello Tech Center
708-250-7420

Now you have claimed that Kinsler and Lil Jack have both purchased Langers Tiger heads... interesting theory.

I know the person who bought them and it is neither I or Mr. Kinsler.

Nah, either one could do a great set of heads proven by there track record.

But I'm sure we all agree, they cost over $20K to duplicate. Thought that maybe you and Jeff went halfs on the set, would each run one...

Calvin Hill
Hill Performance / Mondello Tech Center
708-250-7420

langer told me they were less then half of that.

There is a guy in southern Texas that did a nice pair of Tigers as well. His stuff seems to run good at the track as well :)

... alright, me and EC agree'd on something, finally, but yes, Darin Morgan's Tigers ran very well ...

http://forums.maxperformanceinc.com/...d.php?t=684440

:eek:

Calvin Hill
Hill Performance / Mondello Tech Center
708-250-7420

Well, long before all of this internet BS started, I was working with a guy that was in charge of R&D at Profiler and he happened to tell me a story about doing some work on a set of Tiger heads.

Calvin Hill
Hill Performance / Mondello Tech Center
708-250-7420

Thread now open for discussion.

Have actual first-hand experience or information about this head?

If so then please post away, otherwise just read and enjoy the tech info presented here.

Thanks for opening this thread.

Our goal is to further the development on any cylinder head we are involved with. We are looking forward to the horsepower gains we can make with this combination. We will keep everyone posted.
:focus:


Calvin Hill
Hill Performance / Mondello Tech Center
708-250-7420

Can we ask questions that pertain to this head?

What does the head flow at .500?

Rather than locking down a thread and treating us all like children -- why not send the offenders to the corner and block them for a while -- just asking