cams cams ?

[superdave]

hi all ! I have a question. Does anybody know the vance&hines part numbers for those old cams that had produced that power we all live for ? my buddy has found some old cams at his warehouse but cant find his application list. (silly fool) My freshly boared 1179 cc xj needs to breath a little better ! any other suggestions would be very welcome !

[DiverRay]

I don't remember the part number, as it's been too long. If you take your old cams, match exhaust and intake with the new ones, you should be able to see if they will fit. The lift and duration change will probably be hard to see, as just a few degrees makes a difference.
Just my $0.02

[superdave]

cams

I'll be in the warehouse if anybody needs me ! thanks for the suggestion ! Keep your wheels on the ground and your feet on the pegs !

[TopCatGr58]

Hey Dave,

Here's some info I found from a performance shop in the UK, involving regrinding the cams!

http://www.tts-performance.com/catal...th=505_437_471

Yamaha XS 750 / 1100
£342.50
80-121 Availability: 1 Month Turnaround

IMPORTANT:
This is a regrind/hard-weld service to YOUR OWN cam. Ship the cam to us - it will be modified and returned to you. This can take up to one month (note that you are responsible for the cost of getting the cam to us).

High performance street cam for stock engines.

Grind: 118
Intake Valve Lift: 0.365
Exhaust Valve Lift: 0.365
Intake duration @ .050: 246°
Exhaust duration @ .050: 246°

80-131
Strong mid range and top end for hot street-strip. Must use racing pistons and valve spring kit.

Grind: 110
Intake Valve Lift: 0.395
Exhaust Valve Lift: 0.395
Intake duration @ .050: 256°
Exhaust duration @ .050: 256°

80-141
Excellent top end power for racing engines. Must use racing pistons and valve spring kit.

Grind: 125
Intake Valve Lift: 0.435
Exhaust Valve Lift: 0.435
Intake duration @ .050: 261°
Exhaust duration @ .050: 261°

I don't have the STOCK OEM stats handy!
T.C.

[TopCatGr58]

Found the Lift stats for the 78E

Intake= .347
Exhaust= .327

No Duration stats found!
T.C.

[Geezer]

I don't know how much 342 pounds is but it sounds expensive.

Geezer

[TopCatGr58]

Geezer,

The exchange rate is almost 2:1, US to pounds, so it would be close to $700.00 , and it says "CAM", not cams, so not sure if the price is for only 1 cam, or for the set!?

But, what price performance!
T.C.

[Geezer]

A set of hotter cams would be nice to have but at that price, I can live without them...

Geezer

[jimg1au]

part no

hi i have part no for other makes but not v&h
cheers
jimg

[superdave]

jimg1au, the other brand you were refering to, what kind of power should I/ or one would exspect, example; 10 to 15 hp increase ? ps to that other fellow i'll try matching up thoes lobes this next week end . Thanks guys for your help ! T C you are a true addict and must have 30 wt oil in your veins !

[jimg1au]

cams

hi
denco cams 2 types mild camshaft no mods needed,but they sejust replace valve springs with heavy duty do not shim valve springs as valve needs full movement and will bind if shimed.
high performance cam.replace valve springs and cut valve pocket on piston bigger. part no 20-yr-100 and 20-yr-150
rc engineering
rc700 bolt-in racer special
rc710 hot street competition model
rc715 pro stock model
rc720 fuel and gas drag bikes
all cam kits with valve spring kits
web-cam performance cams
118 bolt in for stock
86b street and strip use
86c top end power for compertition
110 hot sreet engines
these also came with valve springs

so from all of this i say if you are changing cams you must also change vale springs for heavy duty

hope this helps
cheers
jim garvey
sydney
australia

[pggg]

S.D. Rule of thumb for bike cams - more lift equals more torque across the range(up to a point). More duration equals more top end power with a corresponding drop in low/midrange. Extra lift with slight duration increase gives a bit of both(ideal for the street/road) Too high a lift and duration wont be suitable for the street/road. Also, if the lobes are too radical, the poor ole XS's shims can come to grief. Small under bucket shims and beefed up springs are ideal. Re-camming can end up being quite a costly tweak.

[superdave]

maybe i'll leave the old girl alone for a while and just ride her a bit ! thanks guys for the imput !