One cam...One map...Eight valves...

[DanT]

Hey everybody,

I am at the stage now with my mk2 silver top vtr where the next mod for more power/noticeable gain would be a higher lift cam or sorts...

Current engine mods are:

De-restricted standard air intake with green cotton panel filter
Supersprint race centre section and backbox
Janspeed 4-1 manifold with sports catalyst

As it stands now the engine is running (touching wood) very well, pulls nice up through the rev range and feels noticeably happier than it did when i bought it a year and a half ago totally standard.

I have read about the newman ph3 cam and one of the catcams which works with oem internals but DOES need an engine map. I want one which would need a map so i see a better gain in theory etc etc.

Would the newman ph3 work with oem internals or would i need uprated stuff to go with it?

I think i sort of need somewhere where i can go and pay them to supply and fit the cam with uprated internals if needs be and then map it for me afterwards. Is there any such a place?

Thanks

[Daniel09]

the cam will work with oem,

although just remember, most engines are designed to just the stress of the standard engine

like with modding all engine its a risk,

remember the more important stuf like cooling,

with them mods your car will be putting out way more HP than its designed for therefor will likely run hotter, and under more stress

mild cams you wont have a problem but with ph3 and remap, its all a big risk really..

modding can go on for ever if you have the pennies,

but yeah you can buy new internals, high comp pistons, rods valve springs

and you engine will go Extremly well

just take stress and heat into considerations as the peak power in ph3 is in the higher rev range, and no doubt after remap your limiter will be higher

[DanT]

Hmm yeh, interesting stuff, anyone else care to elaborate lol??

[chriswoodward]

the cam will work with oem,

although just remember, most engines are designed to just the stress of the standard engine

like with modding all engine its a risk,

remember the more important stuf like cooling,

with them mods your car will be putting out way more HP than its designed for therefor will likely run hotter, and under more stress

mild cams you wont have a problem but with ph3 and remap, its all a big risk really..

modding can go on for ever if you have the pennies,

but yeah you can buy new internals, high comp pistons, rods valve springs

and you engine will go Extremly well

just take stress and heat into considerations as the peak power in ph3 is in the higher rev range, and no doubt after remap your limiter will be higher

complete rubbish, your theory makes sense but to be honest you would never get up to those types of internal temperatures to warrant uprating internals until you start to go down the route of forced induction as long as all the normal breathing mods are done the standard internals will easily handle the power from that cam.

[DanT]

complete rubbish, your theory makes sense but to be honest you would never get up to those types of internal temperatures to warrant uprating internals until you start to go down the route of forced induction as long as all the normal breathing mods are done the standard internals will easily handle the power from that cam.

I assume your talking about the newman ph3?

[chriswoodward]

I assume your talking about the newman ph3?

yeah, but i cant think of any cam wild enough that it would warrant uprating the internals

[DanT]

hmmm yeh, i wasnt looking to go any wilder than the ph3 anyway. Would i need uprated springs and stuff in the head?

[Mieran]

LeeumH had a Kent PT40 in his VTR, he says its good.

Have a look in his old progress thread:

http://www.saxperience.com/forum/showthread.php?t=85590

[Daniel09]

complete rubbish, your theory makes sense but to be honest you would never get up to those types of internal temperatures to warrant uprating internals until you start to go down the route of forced induction as long as all the normal breathing mods are done the standard internals will easily handle the power from that cam.


seen quiet a few cars go wrong in the past im talking not from saw expierience, not on saxo's

all engine have different internals

[vtr_chris90]

hmmm yeh, i wasnt looking to go any wilder than the ph2 anyway. Would i need uprated springs and stuff in the head?

ph2 is the same as ph3 mate both are 280deg cams, but it wouldnt work with your head anyway, its for rallye and xsi heads, and they use big bearing cams so wont fit

erm butttt what you could do is use the xsi or rallye head as they use slightly stiffer springs standard and plus they are non roller rocker heads so cause of them they safer to rev to a higher limit

where as if you use silvertop head you will need to change to uprated springs idealy if you use the ph3

but if you use a mild cam nothing will need to be changed in theory lol

erm but if you want more gains you could look at a standalone, makes mapping alot easier and able to fine tune alot more than std ecu, maybe the pred? depending on what plug ecu you have

you wont need to change any internals, only way you would do that is if you got the ph4 or 5 cam as the lift is insane on them lol and you must run bodies with them too

hope thats helped a little theres alot more but ill just keep it simple lol

oh and if you want more info on camming 8v get yourself on rallyeregister, pretty much most the 8v boys on there have atleast cammed their engines lol theres huge amounts of info on there i learnt most of what i know from there

[DanT]

cheers man, sounds like i need to contact some places. I just need somwhere i can go to just be like supply and fit and i will pay you etc.

clearly not as simple as that by the sounds of it huh lol.

[vtr_chris90]

no its not as simple as people think

ive cammed mine and spent alot of time researching finding what i need, and if you do it properly the list can get quite big lol

but yer it costs alot more than people think too

erm but yer get yourself on rr theres alot of cammed 8v on there and alot of info on it

but a good set up would be xsi/rallye head with ph2 cam thats what i have and its awsome, will gain just as much as ph3 on silvertop, but will rev alot better due to the non roller rockers and stiffer springs, alexb has got an xsi head that was rebuilt not too long ago i think he wants like 70quid for it then you just need the cam, get the head skimmed lightly and cleaned

then headgasket, all service bits like cambelt kit, water pump etc and a pully

all in you could be looking at around 900ish maybe less maybe more depending on what you pay for things then the cost of fitting, also if your getting mapped since your getting the right port head you could get a s1 rallye inlet mani, i have one im selling i only want like 70quid for that

and you should have good gains with that expect about 125ish maybe a tad more with a decent map

[silversaxo113]

leemuh's vtr pulled 117 on the rolllers with out a map and as above it was the kent pt40

[Wizzy]

You will need uprated springs, caps and a vernier pulley to run a PH3 on a silver top, they use a higher power band and upping the rev limit will be a must. Silver top springs are not really up to the job.

I have a pt40 and it made 119.5bhp unmapped, but even with these id reccomend uprated springs at least and a vernier pulley to make the most of it.

As said below its not cheap if you want to do it properly.