[Scott Roberts]

Kinslers old Heads flow better numbers then that on the exhaust.... besides ports that size must be lazy...

[Region Warrior]

TO LATE!

[Jeff Kinsler]

Originally Posted by Scott Roberts

Kinslers old Heads flow better numbers then that on the exhaust.... besides ports that size must be lazy...

you drinking today?

[BruceWilkie]

Originally Posted by cgeise

Where are the push rod tubes ?? and better not show that to anyone - the plug is to close to the exh. --- hehehe - Also - -I keep hearing Tony dont care about no stinking flow bench and CFM -- whats the deal.

Real funny Curt... are you from Rhode Island?

I think that the plug location shown looks a heck of a lot better than the PP head. Havent seen a cut away or raw casting to say with 100% certainty. The plug boss doesnt seem to be hugging the exhaust port wall as tightly and appears to be somewhat better retracted from the exhaust valve.

The plug shell's job isnt just a place to put threads... it has to be able to pull heat away. The tip itself is exposed to pretty much the same temp during combustion, its the ability to pull heat(heat range) that counts.

The exhaust side of the chamber itself is hotter than the intake side. It sees both combustion heat and exhaust heat. The intake side sees more or less same combustion temp at plug tip but is cooler there, due to intake charge being cooler. The closer the plug boss hugs the exhaust port the harder it becomes to cool the plug.

Would this head be better if the plug was on the colder side of the chamber? Probably, if you got the room to do so and not wash the tip with fuel. The tip certainly can face the exhaust valve area.

We wouldnt have heat ranges if all this stuff didnt matter.
FWIW In identical spark plug types, the difference from one full heat range to the next is the ability to remove 70°C to 100°C from the combustion chamber. (Thats 158 - 212 F for those that want to know)

Plenty of plug info here... http://www.ngk.com/search_char.asp?s...nufacturerID=1

When coldest plug isnt cold enough you have to reduce temperature.(lower compression or richen mixture or reduce advance or additional cooling capacity or any combination of those) That costs you horsepower. Ignoring it can cost you a motor.

[J.C.you]

Originally Posted by cgeise

From the looks of your picture --you should be the last one talking about busting things up --- hell I was prob going faster doing a burn out than you do down the back strech!

take the hairdryers off that inverted fiberglass kiddie pool and i think i could take you in my Goat street car. I bet it would only run a high 8 on motor.

[Sirrotica]

OTRTTF works fine.

Curt, I don't think you've attended many oval track races if you think that.
Granted JCs car isn't a sprintcar, it's a modified, however Sprintcars top 150 on a half mile track on dirt. 1375# with driver and close to 900 HP, 1.527 lbs per horsepower is a pretty good power to weight ratio.

1/2 mile on dirt, 4 corners, 2 straightaways, 12.707 track record at Eldora speedway, 141.6 MPH average speed. Fastest 1/4 mile dirt record I could find is 9.269 seconds, 97.11 MPH average. There are many variants in between and of course more banking along with longer straightaways will fall in between these 2 figures, If you think it's easy, try it.........................

Oh yeah, no breakout and every race has no handicap, heads up all the time, fastest guy wins.

[R 70 Judge]

How big is this engine to utilize a 5 square inch intake port? Wouldn't you need to turn a 505" engine 11,000 rpm to use it properly?

[Tom Vaught]

Very Nice Work on the Head, Lynn and Tony!

Tom Vaught

[bryansMtngto]

Really like what your doing Lynn. Nice work.

[David Holmberg]

Originally Posted by Jeff Kinsler

j.c you just dont steal my EHTTFMF and put RA5TTFMF!

Donald said you stole it too...

Nice numbers Lynn!

[twinturrbo406]

Originally Posted by GTO Dan

JC, Curt...Bravo...finally some trash talking that doesn't involve the CV1.

Carry on.

... tell me about it ...

[twinturrbo406]

Originally Posted by Jeff Kinsler

see it aint just the cv1 guys that get all uptight!!!!



AND WERE OFF!!!!!!!!

j.c you just dont steal my EHTTFMF and put RA5TTFMF!

nice numbers!

... on one hand, that makes me laugh my butt off, on the other it makes me want to smack you ...

[twinturrbo406]

Originally Posted by R 70 Judge

How big is this engine to utilize a 5 square inch intake port? Wouldn't you need to turn a 505" engine 11,000 rpm to use it properly?

... JC said it was the 620c.i. engine earlier in the thread ...

[Jim Robertson]

Holy Cow! 5 sq in is a big number...a whole QJet will fit in that port. :-)

Hopefully I did the math right - 470 cfm through a 5 sq in opening comes out to an average of 225 ft /sec.

and if we use Darin Morgan's port limiting velocity of 665 fps as the choke point, a popular 541 cid combo could turn to 10,800 RPM before choke. D*mn!!

Lynn What is your target engine size/application?

[65nss4spdGTO]

But it doesn't look like the factory V head anymore.

Calvin Hill
Hill Performance
708-250-7420

[S/st 54]

Great work Lynn!!! And thank you for being the only person to start laying down the ground work to start offering some real world cubic inches!600-700cubic inches sounds like more of what the competition in the nhra is running.I know that is off subject but I wanted to say thanks.

[NHRASuperStock455SD]

Originally Posted by cgeise

Where are the push rod tubes ?? and better not show that to anyone - the plug is to close to the exh. --- hehehe - Also - -I keep hearing Tony dont care about no stinking flow bench and CFM -- whats the deal.

This is very true. He doesnt even give out flow sheets! I understand his position as people live and die with this, but do most people know that most competition engine builders go for port shape first and flow second?

Tony says that they get heads in his shop all the time that actually flow big numbers, but they dont make any power. He redoes the heads.....the flow drops and the power comes back up to what he normally gets.

It is like making beautiful pasty that tastes like S*&).

[RAIV-Z]

Originally Posted by NHRASuperStock455SD

This is very true. He doesnt even give out flow sheets! I understand his position as people live and die with this, but do most people know that most competition engine builders go for port shape first and flow second?

Tony says that they get heads in his shop all the time that actually flow big numbers, but they dont make any power. He redoes the heads.....the flow drops and the power comes back up to what he normally gets.

It is like making beautiful pasty that tastes like S*&).

Tony absolutely does provide customers with flow sheets. I have one for my RA-V heads.

[NHRASuperStock455SD]

Originally Posted by J.C.you

i had Tony move the pushrods out of the port. Any more D***A** questions besides the ones you asked?

I really left this up to Tony. He was on the fence either to move it or not. When we put the push rod in the center, we can gain flow on the sides by increasing the port width. We also can make the port bigger with the push rod in the middle. He was happy in the beginning, but at the end he wasnt as sure.

I fundamentally disagree with moving the pushrod out of the way. Cross Sectional area on those engines are way more important than flow. We could only achieve the additional CSA by squaring off the port.

CSA(min) = bore x bore x stroke x rpm x 0.0035/620
= 4.5 x 4.5 x 4.785 x 8000 x .0035/620
= 4.46 sq inches minimum.

This limits this engine to low 8000 RPM with a minimum port. Our next engine is the 406 RAV engine @ 11,000 RPM. Valve train lined up straight I believe is a very good thing. A 5.750 length valve and pushrods in the 8.200 length range advantage RAV.

[roadrage david]

Originally Posted by cgeise

corners are only for people that dont know where there going - or where they been from --------

i pretty sure the bordem of a straightline run can be fixst bij taking highspeeds corners with a pontiac and beating up several brands in the prosses including a 250.000 usd 1000hp Kremer K3 lemans porshe http://youtu.be/pv4qouMwhj8 and on ahil climb http://youtu.be/-Me_eLrG0ro he knows aczackly where he is going hahhahah