916 issues

[CipiVTS]

Hi all,

I bought a 1995 916 with SP cams (i don't know which kind yet) set to work in the upper range (bike has a custom eprom and has 12000 rpm limit).

It pulls well over 7000 rpm, but unfortunatelly i don;t use the bike for race only (as it has been used before), but 70% of the time for street.

What i want to do is set the cams to the normal 916 range and then order a FIM eprom to suit this.

Can anybody tell me what is the normal setting for the std, A/A, G/A, 996 SPS cams so i can dial them to the factory setting.

also, can anybody help me understand what is the best setting i could do to benefit most of the cams?

Thanks and regards

[phil_h]

You sound as if you want the full story :D
Try reading some of this guy's stuff
http://www.moto-one.com.au/performance/index.html

[phil_h]

Oh, welcome to the board by the way, and thank you for asking, I'll have an ice-cold Guinness while you're at the v-bar :D

[nelly]

The SP cams are a "racy" grind. It's not a case of dialling them to a softer setting, but swapping them for probably BP cams will be the only real way you'll get the low/mid range back for road riding.

[CipiVTS]

Thanks Phil :D:D:D

Nelly,

But the standard 916 SP was still a road bike... how was the driveability in the lower/mid range?

[weeksy2]

It was great... if you pay for the work to be done, i'll have the SP cams and EPROM :)

you can have the stock items from my 98' 916 :)

[andyb]

Originally posted by CipiVTS
Hi all,

I bought a 1995 916 with SP cams (i don't know which kind yet) set to work in the upper range (bike has a custom eprom and has 12000 rpm limit).

It pulls well over 7000 rpm, but unfortunatelly i don;t use the bike for race only (as it has been used before), but 70% of the time for street.

What i want to do is set the cams to the normal 916 range and then order a FIM eprom to suit this.

Can anybody tell me what is the normal setting for the std, A/A, G/A, 996 SPS cams so i can dial them to the factory setting.

also, can anybody help me understand what is the best setting i could do to benefit most of the cams?

Thanks and regards


By the mere fact your asking this i would suggest it is a tad confusing!

i would suggest you go to a trained professional and tell them what you want!

[CipiVTS]

indeed andy i'm a bit confused because there are a lot of things i don't know about my current engine setup.

I started a discussion with Brad from Moto one about this and i hope i'll get some clarifications. The first thing i need to do is to find out what cams i have. This can be done by measuring them or by checking the marks (numbers/letter) stamped on.

does anybody have an idea what are the possible codes written on them?

I checked a set of standard ones and it has OA/OS and VA/VS on them (which means Orizontal Admission/Exhaust Vertical Adm/Exh of course) and A1

I guess A1 is the sort of code Brad was talking about...

Does anybody have an idea?

Thanks

[Rob B]

Cipi,

I have just taken a set of standard Strada cams (A1 grind) out of a low mileage 996 motor if you need 'em.

Rgds, Rob

[CipiVTS]

Thanks Rob, but i have another 748 engine that has the vertical cylinder head cracked and i keep it as spare parts.

Regards,
Cipi

[nelly]

A1 is a standard "street" profile. This is fitted to most of the street engines since the 851. 916, 748, 996, ST4 etc.
The wilder cams are marked, for instance, T1 - 996SPS, G - corse or 431 - corse etc.
If the cams have no markings other than OA/VA etc, then the only way you'll find out is to measure them.

[cjsperf]

find out whitch cams you have and i could send you a setting to give you more power all the way to the peak but make its peak lower in the rpm range wich will help you to not rev the crap out of it. there is a lot of myths about cam timing and normally quoted by people who do not under stand its affect on an engine. you could go back to biposto cams of try somthing different.
or Originally posted by CipiVTS
Hi all,

I bought a 1995 916 with SP cams (i don't know which kind yet) set to work in the upper range (bike has a custom eprom and has 12000 rpm limit).

It pulls well over 7000 rpm, but unfortunatelly i don;t use the bike for race only (as it has been used before), but 70% of the time for street.

What i want to do is set the cams to the normal 916 range and then order a FIM eprom to suit this.

Can anybody tell me what is the normal setting for the std, A/A, G/A, 996 SPS cams so i can dial them to the factory setting.

also, can anybody help me understand what is the best setting i could do to benefit most of the cams?

Thanks and regards

[CipiVTS]

thanks cjsperf

I will measure them in the next weeks once i fit the adjustable pulleys and let you know

Best regards,
Cipi

[CipiVTS]

Hi

I took off the cams from the engine and surprise... they're A1 cams... dialled to get the benefit of the engine at high revs (<13000 rpm).

I also checked and the intake ports seem machined and larger than standard.

Valves are 34 / 30

I'm running a 45mm system with 45mm termis and a BMC air filter.

I bought some adjustable pulleys and i will fit them. What cam dial settings do you recommend with my configurationtaking into consideration i really don't want to rev the crap out of it?

Thankx