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[skyhook]

I'm the Al Taylor that built heads for Cale Yarbrough, Bill Elliot and Ray Evernham. Never heard of TK enginering...there's a T&L(?) engine development in Stanfield N.C., Loydd Mcleary is the owner  and KT engine development in Concord N.C...Kenney Trouhtmen is the owner, both of whom I have worked for. I have also worked for Keith Dorton, David Vasselnuck  and have done contract work for half a dozen cup teams. I have been building and racing cars and motorcycles for 40 years. Have set national records, won championships with cars, motorcycles, dirt, asphalt, snowmobiles, motocross, roadrace etc.

Why does he want to build a undersquare motor then want to spin it to 7000 rpm? All the head work on the planet won't help that. 4500 feet/minute is a good number for safe piston speed...at 7000 rpm piston speed is 4958 fpm...a cup motor will run at 4700 fpm at 9000 rpm and all the parts are thrown out after the race. They have a much shorter rod, better alloy pistons, and a plain bearing crank! The roller crank gets real pissed off at 7000 and up. Ok for short bursts, but cylinder fill is so poor at that fpm you're junking your parts for nothing. Let's talk about piston speed and cylinder fill. Long stroke = fast piston speed and poor cylinder fill...short stroke = slow piston speed and better fill. I would custom-build pistons for this deal...Wiseco uses 4032 alloy aluminum in their shelf pistons...with this kinda speed alloy #2618 is a must!! 

I have a baseline cnc program.

For this deal I would want to weld the ports and raise the intake. This of course requires a lot of other work!

11 to 1 is about the maximum practical compression on pump gas, unless you can run higher octane.

I would suggest titanium valves depending on the amount of street miles the motor will see. I use Del West when people have the money. Ferrea and Kibblewhite for stainless or cheaper titanium. The titanium would require beryllium seats. I use C.H.E. guides and use an intramike and a sunnen hone to size them. Mostly comp and psi valve springs with P.E.P. titanium upper retainers. If not titanium valves then I suggest 7 mm, depending on lifters...with stock lifters and 5/16 stem stainless valves I do not go over 160 to 170 psi on the seat, much more and you overcome the hydraulic lifter pressure. Depending on the spring  260 to 320 at full lift. With solids we would bump that up. 7 mm  and titanium would be different. For street motors I have had good luck using a lower pressure on the exhaust side...it is a lighter valve and needs less pressure to control it. As a result we see fewer problems with noisy lifters   

 

[skreminegul07]

Am the Al Taylor that Built heads for Cale Yarbourgh,Bill Elliot and Ray Everham. Never herd of Tk enginering. T+l engine development in Stanfield N.C. Loydd Mcleary is the owner  and KT engine development in Concord N.C. Kenney Trouhtmen is the owner Both of whom I have worked for. I have also worked for Keith Dorton, David Vasselnuck  and have done contract work for half a dozen cup teams. I have been building and racing  cars and motorcycles for 40 years. Have set national records won championships with cars ,motorcycles,dirt asphalt,snowmobiles,motocross,roadrace ect.

Why  doe's he want to build a undersquare motor then want to spin it to 7000 rpm? All the head work on the planet won't help that.4500 fpm is a good number for safe piston speed at 7000 rpm piston speed is 4958 fpm A cup motor will run at @ 4700 fpm at 9000 rpm and all the parts are  thrown out after the race and they have a much shorter rod, better alloy pistons. and a plain bearing crank! The rollor crank gets real pissed off at 7000 and up. ok for short bursts.But cylinder filling is so poor at that fpm you junking your parts for nothing. Lets talk about piston speed and cylinder filling.Long stroke=fast piston poor cylinder filling short stroke=slow piston better fill. I would custom build pistons for this deal Wiseco uses 4032 alum in there shelf pistons with this kinda speed 2618 is a must!! 

I have a baseline cnc program.

for this deal i would want to weld the ports and raze the intake. This of course requires a lot of other work!

11 to 1 is about the max you to run on pump gas. Unless you can run or they have higher octane over there.

I would suggest titanium valves depending on the ammount of street miles  I use Del west when people have the money. Ferrea and Kibblewhite for stainless or cheeper titanium.The titanium would require burellium seats.I use C.H.E. guides and use a intramike and sunnen hone to size them.Mostly comp and psi valve springs with P.E.P. titanium upper retainers. If not titanium valves than I suggest 7 m/m Depending on lifters with stock lifters and 5/16 stem stainless valves I do not go over 160 to 170 psi on the seat much more and you overcome the hyd pressure. depending on the spring  260 to 320 at full  lift. with solids we would bump that up. 7 m/m  and titanium would be different. for Street motors I have had good luck using a less pressure on the exhaust side as it is a lighter valve and needs less pressure to controll it. As a result less problems with noizy lifters   

 

Al, sounds like you have the resume.  Who's posts were you referring to?

[skyhook]

sory if I was vague...I'm not al, just his pr man...the article was in response to an email from a potential customer who wants to build a 3.875 x 4.25 street/strip motor to turn 7k rpm

[SBB]

sory if I was vague...I'm not al, just his pr man...the article was in response to an email from a potential customer who wants to build a 3.875 x 4.25 street/strip motor to turn 7k rpm

PR man?

So your the messenger?
Just wondering!

 

[Unbalanced]

Skyhook,

What is the specific question or proposed scenario that this answer is relating to.    

Why  doe's he want to build a undersquare motor then want to spin it to 7000 rpm? All the head work on the planet won't help that.4500 fpm is a good number for safe piston speed at 7000 rpm piston speed is 4958 fpm A cup motor will run at @ 4700 fpm at 9000 rpm and all the parts are  thrown out after the race and they have a much shorter rod, better alloy pistons. and a plain bearing crank! The rollor crank gets real pissed off at 7000 and up. ok for short bursts.But cylinder filling is so poor at that fpm you junking your parts for nothing. Lets talk about piston speed and cylinder filling.Long stroke=fast piston poor cylinder filling short stroke=slow piston better fill. I would custom build pistons for this deal Wiseco uses 4032 alum in there shelf pistons with this kinda speed 2618 is a must!!  

It is great to have insight from someone with in depth knowledge, but this information is all over the place.   You may want to proof it for public release especially with someone elses name on it that your referring to.   I won't even get into the typos and spelling.  You may also want to spell out the acronyms that he is using for people to help those without the indepth knowledge on motors.  Such as Feet per Mile.   I also don't know to many people on this site with their bikes having a rev limiter past 6200 and with the 110 with no work past 5800.  

[SBB]

Skyhook,

What is the specific question or proposed scenario that this answer is relating to.    

Why  doe's he want to build a undersquare motor then want to spin it to 7000 rpm? All the head work on the planet won't help that.4500 fpm is a good number for safe piston speed at 7000 rpm piston speed is 4958 fpm A cup motor will run at @ 4700 fpm at 9000 rpm and all the parts are  thrown out after the race and they have a much shorter rod, better alloy pistons. and a plain bearing crank! The rollor crank gets real pissed off at 7000 and up. ok for short bursts.But cylinder filling is so poor at that fpm you junking your parts for nothing. Lets talk about piston speed and cylinder filling.Long stroke=fast piston poor cylinder filling short stroke=slow piston better fill. I would custom build pistons for this deal Wiseco uses 4032 alum in there shelf pistons with this kinda speed 2618 is a must!!  

It is great to have insight from someone with in depth knowledge, but this information is all over the place.   You may want to proof it for public release especially with someone elses name on it that your referring to.   I won't even get into the typos and spelling.  You may also want to spell out the acronyms that he is using for people to help those without the indepth knowledge on motors.  Such as Feet per Mile.   I also don't know to many people on this site with their bikes having a rev limiter past 6200 and with the 110 with no work past 5800.  

Great post Harry!
And NO, you can't quote me on that!

 

[Unbalanced]

Great post Harry!
And NO, you can't quote me on that!

 

Just for posterity

[SBB]

Just for posterity

I knew that!

     

[Unbalanced]

Chip,

I would welcome thought out technical information from Al that was more practical to the majority of people here.   95, 103, 110 and some of the jim's items for everyday riding, hotroding, stump pullers and the like.   I think this would benefit a lot of people to have the insight from someone who has the pedigree. 

   

[skyhook]

cool...posted this same article on htt, vtf, and hdf...and got the most replies here...so in the grand tradition of doing things bassackward, here's the question

Hello Skyhook, thanks for the reply, is Al Taylor the same guy that builds the NASCAR engines at TK Engineering in Charlotte?

I will be building a 4.25" stroke 100 Cu In x 7000rpm Street/Strip motor based on the TC96".............so I am looking to get spec built heads to suit and if he is the same guy I would be very interested in getting him to put a set together for me...................

Race trim will utilise:
TR660 Lift cam
possibly 11:1 comp ratio (Maybe higher)
55mmTB/58mm Intake
Custom made race pipes
3.15 gears
Spec built pork chop crank with H Beam rods and wiseco forged 10.5:1/103" pistons
Roller Rockers and hopefully a set of Al Taylor heads to my specs...................

In street trim I will run the woods TW-400-6 Cam and a V&H Big Radius 2:1

I also want to know does he just port the stock heads or does he supply cnc heads etc.......

I want to know the type of valves, guides, and spring sets he uses.....including seat poundage and overnose weight...........

[skyhook]

harry I guess I deserve it for calling your dynos happy...but I'm not bitter about it lol...thing is al is a shop lizard...he's not interested in selling himself...also he used to cruise the forums, but has little tolerance for folks disagreeing with his methods...and me, I don't know much, but like to come to the forums and pretend...so we're a perfect match...if anyone has specific questions, I'll gladly ask him

[SBB]

harry I guess I deserve it for calling your dynos happy...but I'm not bitter about it lol...thing is al is a shop lizard...he's not interested in selling himself...also he used to cruise the forums, but has little tolerance for folks disagreeing with his methods...and me, I don't know much, but like to come to the forums and pretend...so we're a perfect match...if anyone has specific questions, I'll gladly ask him

and me, I don't know much, but like to come to the forums and pretend...

O boy!

[dlaws01]

I'm the real Al Taylor and I never said that!

[skyhook]

dlaws please tell me you're kidding...when al said he never heard of TK engineering charlotte, made me wonder if there were 2 al's...kinda common name

[wcgrinder]

dalws01 is my evil twin brother. (Just Kidding) Gotta be a bunch of Al Taylors out there I AM THE AL WHO SENT THE POST TO SKYHOOK any questions