TTS 250 Cam

[Murph83]

Hi Guys,

We are currently putting a 124" build together using the TTS 250 cam. On the TTS web site it says not to run over 12-1 comp on the 250. Does anyone know the intake closing point on this cam? We have a few piston options in stock and will look to set the build up between 220-230ccp

Thanks

[prodrag1320]

Hi Guys,

We are currently putting a 124" build together using the TTS 250 cam. On the TTS web site it says not to run over 12-1 comp on the 250. Does anyone know the intake closing point on this cam? We have a few piston options in stock and will look to set the build up between 220-230ccp

Thanks

maybe check with TTS ()

[BigT]

I called and asked the same question for a 117" build using the TTS 200 cam and he wouldn't tell me.

[Don D]

Why don't you guys measure the lifter rise with a degree wheel attached and TDC found and indicator setup if you have to know.

[BVHOG]

I got a better idea, why don't you use a product where the vendor gives you the needed information to properly build a combination and not assume that they know what's best for you.

[rigidthumper]

That info may be helpful, maybe not. I've seen many cases where the valve timing info not given, ( base circle open to .053" and .053 close to base circle) and valve lo lift flow, had a huge affect on the CCP; where the cam card data indicated the SE255 (6/25,48/7) should crank about 185-187# at seal level, CVOs usually measured way above that- sometimes as high as 210-212#.

I'd set the static at 11.8 just to leave a tiny margin for error. Build it, tune it, & let it eat tires.

[Don D]

Agreed which is why I said "if you have to"
It is just an OCD adventure beyond setting it at what is recommended.

[HD/Wrench]

That info may be helpful, maybe not. I've seen many cases where the valve timing info not given, ( base circle open to .053" and .053 close to base circle) and valve lo lift flow, had a huge affect on the CCP; where the cam card data indicated the SE255 (6/25,48/7) should crank about 185-187# at seal level, CVOs usually measured way above that- sometimes as high as 210-212#.

I'd set the static at 11.8 just to leave a tiny margin for error. Build it, tune it, & let it eat tires.

here is the stick at 11.1
124 billet cat by GMR Performance, on Flickr

[Murph83]

Thanks Steve  Do you think we will run in to issues at 11.5-1? We have changed the build plan and will be using the S&S 128" pistons/cylinders.We will zero deck the cylinders and heads will hace a 89cc chamber volume

[Mopower]

That info may be helpful, maybe not. I've seen many cases where the valve timing info not given, ( base circle open to .053" and .053 close to base circle) and valve lo lift flow, had a huge affect on the CCP; where the cam card data indicated the SE255 (6/25,48/7) should crank about 185-187# at seal level, CVOs usually measured way above that- sometimes as high as 210-212#.

I'd set the static at 11.8 just to leave a tiny margin for error. Build it, tune it, & let it eat tires.

here is the stick at 11.1
124 billet cat by GMR Performance, on Flickr

Nice Tq curve for sure, but this build you posted in the Dyno forum with the S&S 475 is more impressive to me. Bolt in cam. No valve springs needed. Seems to me to be THE cam for the 124" stock head motor so far.
https://harleytechtalk.com/htt/index.php?topic=106997.0

[HD/Wrench]

stock heads vary that is not the same pipe I would give up the extra tq for this curve , that Bassani is stupid loud like I would toss it into the nearest trash can loud .  Ear plugs in and muffs over the top and my head was still ringing  after the dyno tune . Sorry power or not that is  not what I would want I could never ride the bike.. My dog is in the shop most days and she even ran off and she will sit by a 124 with a zilla or rush wrath and not care . that one idling she haul arse out of the shop into my office   

Tuning wise the 250 was much easier to dial in . and I have tuned the 475 with the billet cat . Both make good power .

[ndmp40]

I got a better idea, why don't you use a product where the vendor gives you the needed information to properly build a combination and not assume that they know what's best for you.

X2

[Durwood]

I got a better idea, why don't you use a product where the vendor gives you the needed information to properly build a combination and not assume that they know what's best for you.

X3 

[Murph83]

Valid point about using a vendor who is happy to share cam specs  TTS 250 is sitting here on the shelf but we also have a CR-470 in stock. Thanks for your input

[Mainecat]

Ahhh maybe he doesn't want someone copying his work.  I took a risk with the TTS200 in my SE 114".  It has great driveability at all rpm's and is pulling 130/120 with stock heads.

[ndmp40]

All you have to do is buy one and run it through a cam doctor. 

So much for that excuse....

[Durwood]

Valid point about using a vendor who is happy to share cam specs  TTS 250 is sitting here on the shelf but we also have a CR-470 in stock. Thanks for your input

Here are the specs of the CR-470 in case the spec sheet didn't come with the cam.

Intake   open 16  Close 40  .470 lift  102LC   236 duration

Ex.    Open 60   Close 14   .460 lift  113LC  254 duration

30 degree over lap  107.5LSA

[BVHOG]

Valid point about using a vendor who is happy to share cam specs  TTS 250 is sitting here on the shelf but we also have a CR-470 in stock. Thanks for your input

Here are the specs of the CR-470 in case the spec sheet didn't come with the cam.

Intake   open 16  Close 40  .470 lift  102LC   236 duration

Ex.    Open 60   Close 14   .460 lift  113LC  254 duration

30 degree over lap  107.5LSA

Oh  no now you did it, everyone will copy this cam and sell it as their own.

[Durwood]

Valid point about using a vendor who is happy to share cam specs  TTS 250 is sitting here on the shelf but we also have a CR-470 in stock. Thanks for your input

Here are the specs of the CR-470 in case the spec sheet didn't come with the cam.

Intake   open 16  Close 40  .470 lift  102LC   236 duration

Ex.    Open 60   Close 14   .460 lift  113LC  254 duration

30 degree over lap  107.5LSA

Oh  no now you did it, everyone will copy this cam and sell it as their own.

[Murph83]

Thanks Durwood, we have the cam card here. We have used the CR-530 in our last two 124 builds and they performed very well.

[sfmichael]

Valid point about using a vendor who is happy to share cam specs  TTS 250 is sitting here on the shelf but we also have a CR-470 in stock. Thanks for your input

Here are the specs of the CR-470 in case the spec sheet didn't come with the cam.

Intake   open 16  Close 40  .470 lift  102LC   236 duration

Ex.    Open 60   Close 14   .460 lift  113LC  254 duration

30 degree over lap  107.5LSA

Oh  no now you did it, everyone will copy this cam and sell it as their own.

x2

[HD/Wrench]

well if any one wants to sell the cam that has no specs  as no way it can work  happy to take it off your hands . cheap that is as well it has no specs that makes it close to useless based on a few posts here 

[Cvosjoe]

I got a better idea, why don't you use a product where the vendor gives you the needed information to properly build a combination and not assume that they know what's best for you.

[Slyde]

well if any one wants to sell the cam that has no specs  as no way it can work  happy to take it off your hands . cheap that is as well it has no specs that makes it close to useless based on a few posts here 

[Ohio HD]

well if any one wants to sell the cam that has no specs  as no way it can work  happy to take it off your hands . cheap that is as well it has no specs that makes it close to useless based on a few posts here