Raptor Cam and lifters

[58vw]

thanks lids

[H67bug]

Heyden Mizon has one installed in his street bug perhaps he can put up some feedback as he's on the CLF!

All the best Paul

Smoother, faster, more drivable.

Happy as someone in the driving seat , had a great cal look year with plenty of road time and some track too.

[Eddie DVK]

Hi I going to hijack this for a second,

how many valve clearance do you guys have with aluminium pushrods?

Regards Edgar

[BeetleBug]

Hi I going to hijack this for a second,

how much valve clearance do you guys have with aluminium pushrods?

Regards Edgar

Loose 0

[Zach Gomulka]

Have you found that you're able to run tighter valve to piston clearances with the Raptor cams?

[ED2.4]

Hi I going to hijack this for a second,

how much valve clearance do you guys have with aluminium pushrods?

Regards Edgar

Loose 0

really? it not .006" like the    2024-T3  aluminum pushrods ?

[BeetleBug]

Yes. After bending 4 HD Manton pushrods at a dyno session I changed to JPM double tapered alu pushrods and the result is a much quieter valve train. On top of that I have not needed to adjust the valve clearance during the entire race season. A win-win situation if you ask me.

Hi I going to hijack this for a second,

how much valve clearance do you guys have with aluminium pushrods?

Regards Edgar

Loose 0

really? it not .006" like the    2024-T3  aluminum pushrods ?

[Eddie DVK]

Yes. After bending 4 HD Manton pushrods at a dyno session I changed to JPM double tapered alu pushrods and the result is a much quieter valve train. On top of that I have not needed to adjust the valve clearance during the entire race season. A win-win situation if you ask me.

Hi I going to hijack this for a second,

how much valve clearance do you guys have with aluminium pushrods?

Regards Edgar

Loose 0

really? it not .006" like the    2024-T3  aluminum pushrods ?

Ok thank you.
 is not a lot, 

Regards Edgar

[Lids]

Old thread but...

Pushrod discussion here we come.

As you can read i have a set of mantons, but have been toying with the idea of aluminium.

My latest thought are Smith Borthers.  Any comments?

[JS]

I just changed my Mantons for alu JPM pushrods and will never go back. Incredible weight difference but most of all complete lack of valvetrain noise, even when very hot!

[TexasTom]

YES!
They are of OUTSTANDING design and quality!
 
TxT

[BeetleBug]

I just changed my Mantons for alu JPM pushrods and will never go back. Incredible weight difference but most of all complete lack of valvetrain noise, even when very hot!

Velkommen etter 

[magic]

try to see how much pressure JPM's aluminum pushrods can handle!!! I have a late engine project going on ( desperately hoping to be ready for SCC!  )
 I'm going to use Johannes's pushrods. And I have a question for all of you who already run them.... What pushrod tubes do you use?

cheers.

[Jesse/DVK]

And another question. At the moment I have a Webcam 86c, TP 55 gram tool steel lifters, Jaycee pushrods and dual springs. If I upgrade to JPM pushrods can I also use the single springs or are they only for raptor cams?

[Torben Alstrup]

Jesse, that would be a no.

T

[BeetleBug]

try to see how much pressure JPM's aluminum pushrods can handle!!! I have a late engine project going on ( desperately hoping to be ready for SCC!  )
 I'm going to use Johannes's pushrods. And I have a question for all of you who already run them.... What pushrod tubes do you use?

cheers.

K800's no problem. But be aware, they do not work with fancy smancy spring type pushrods like JayCee. They are way to fat and will rub. Much better of using ordinary pushrods or WBX style.

[magic]

Hey BeetleBug.

You are absolutely right, K800 springs will be no problem!
 And I'm aware of the  "space" problem ..... I bought ordinary "wide" pushrods tubes, but what I can't figure out... If you take a set of Manton p....... and say, use it with a set of Jaycee tubes ..... In my case, they had touched the side of the tube, just a bit ..... And if you hold them up against the new aluminum pushrods, and the new "wide" tubes, then I'm short of 0.5 mm "air"??!...

[Taylor]

I have a question:  What is the O.D. on the JPM aluminum pushrods?  I have Head's Up Performance pushrod tubes with 7/16 pushrods with no rubbing.

[Johannes Persson]

Hi There!

The PRs are 283.5mm uncut, ends are 10mm long.
Diameter is 9-12-9mm.
Material is 7075, machined from a 15mm solide bar.
My recommendation is std WBX telescope tubes.

Best regards
Johannes Persson

[ED2.4]

Hi all,
answer from the manufacturer himself , what else ! 
Johannes ,could you confirm the valve clearance with your 7075 PRs ? "0" loose, right?
i know 7075 is approx twice stiffer than 2024-T3 PRs like the Smith Brother model but want to be sure
thanks for all your innovative work/parts
Eddy

[magic]

Hi all, answer from the Manufacturer himself, what else!  

 you're right ED2.4!
 Thanks for your advice Johannes!!!

[Johannes Persson]

Hi ED2.4,

Valve lash has to be set after what engine case( Mag or Alu) and ramp length(height) on cam.
Mag case and old cam design, zero hard.
Mag case with new cam design like Raptor, zero loose.
Alu case and old cam design, zero loose.
Alu case with new cam design like Raptor, zero loose to 0.004".

About K800 and my PRs, I have done some tests with the combination and so far no problem.
With a newer design of the valvetrain the K800s are in most cases not necessary.
I have just finished an drag race engine(2332cc) with 17mm valve lift, engine pulls easily to over 9000rpm and has full valve control.
The valvetrain is Raptor cam, Shubeck lifters, 7075PR, Alumec retainers, OTEVA75 springs std size and Ti valves 48x38mm.

Best regards
Johannes Persson

[magic]

By the way Johannes, can I buy some 0.5 and 0.3 mm shims?!  perhaps tomorrow 

[karl h]

how do you make a waterboxer pr tube fit a type one style case?

[richie]

how do you make a waterboxer pr tube fit a type one style case?

Turn it round the other way,big end at head and just use type 1 seals and stretch it over the big end

I have used them for a long while,work really well,just no use on a narrow engine,the real benifit of the  fancy smancy spring type pushrods like JayCee    is when you got to 6 stud or equal length studs under the valve cover area as you need to put the tubes in after the heads are torqued up

cheers richie

[ED2.4]

Hi ED2.4,

Valve lash has to be set after what engine case( Mag or Alu) and ramp length(height) on cam.
Mag case and old cam design, zero hard.
Mag case with new cam design like Raptor, zero loose.
Alu case and old cam design, zero loose.
Alu case with new cam design like Raptor, zero loose to 0.004".

About K800 and my PRs, I have done some tests with the combination and so far no problem.
With a newer design of the valvetrain the K800s are in most cases not necessary.
I have just finished an drag race engine(2332cc) with 17mm valve lift, engine pulls easily to over 9000rpm and has full valve control.
The valvetrain is Raptor cam, Shubeck lifters, 7075PR, Alumec retainers, OTEVA75 springs std size and Ti valves 48x38mm.

Best regards
Johannes Persson

Thank you Johannes 
BR
Eddy

[magic]

[Turn it round the other way,big end at head and just use type 1 seals and stretch it over the big end]

[I have used them for a long while,work really well,just no use on a narrow engine,the real benifit of the  fancy smancy spring type pushrods like JayCee   is when you got to 6 stud or equal length studs under the]
 [valve cover area as you need to put the tubes in after the heads are torqued up]

[cheers richie]

my engine is 1cm. shorter than stock ..... so no std. pt. for me then    

[magic]

Are there any of you fellow lounger that can give me an inside measurement, of one of the fancy P.T. In its center..... please!  
I am about to assemble my engine again this week... And it would be cool to know what could be done..... BEFORE I reassemble it

[pupjoint]

whats the diff between the alumec and titan?

titan is lighter?

[JS]

Alu is lighter.