PH2 Cam in 1098?
Turbo Mini Forums

From what I have gathered after reading multiple posts, the ph2 cam from Avonbar seems to be the best turbo cam. Does anyone know what needs to be done to make it fit in a small bore engine, specifically a 1098. Do I have to get a different oil pump?

What valve springs and rocker set-ups do people recommend for the small bore engines?

I have tried emailing Avonbar but I received no response….

have a read in the 998 section

Wil_h has tried a ph2 in a 998 and he didnt think it was beneficial to performance...as far as i know no one has tried it in a 1098..

"Turbo's make torque, and torque makes fun"

"did you know you can toast potato waffles?"

Do you know what is the best cam for the small bore engines? How does the stock do?

have a read in the 998 section, there is a couple of people who have 1098's using ozzy cams (RE13T?) to good effect, maybe pm them for more info

the mg cam is the only readily available (here in the uk) 'well proven' performer in small bore, stock cams would definately work as a budget option...

"Turbo's make torque, and torque makes fun"

"did you know you can toast potato waffles?"

Do you know what is the best cam for the small bore engines? How does the stock do?

***Not sure why it double posted....

Edited by Mikes1098 on 19th Jan, 2008.

It seems the cam I have is the 12G165. I assume the MG Metro Cam that is recommended is the one with the ¼” groove….if that is the case the only difference between the two cams is a 4 degree shift when the inlet and exhaust opens and closes, everything else is the same. I would imagine the most important number for a turbo is the overlap, which is reported at 26 degrees for both, per Vizard’s yellow book. Do the extra 4 degrees make that big of a difference?

Alright, now I am a bit confused….

It seems the cam everyone wants is the non-turbo MG Metro cam (In. 16/56, Ex. 59/29) however in the book there is no mention of the ¼” groove. The one that has the ¼” groove is the turbo metro cam (In.9/41, Ex.55/17). This can be found on page 285 in “Tuning the A-series Engine.” Am I misreading this? I have found numerous places in the forum where it states the non-turbo cam has the ¼” groove….which is it?

The other thing I am a bit confused with is the overlap. The non-turbo MG Metro cam (In. 16/56, Ex. 59/29) has an overlap of 45 degrees…more than any of the other OEM cams. I thought overlap was bad for turbo engines…..

Hi,
Welcome to TM Mike :)
Is this of any help?

Cheers,
Gavin :)

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Thanks Gavin, this site rocks, there is so much great information that I cannot seem to leave it....

I have seen this site, it to describes the MG Metro Cam (In. 16/56, Ex.59/29) to have the 1/4" groove... Is there a chance that Vizard mixed it up in his book? Or is it possible that the ¼” groove is on both but after different lobes?

Thanks, Mike

Edited by Mikes1098 on 19th Jan, 2008.

i thought the NA mg metro cam have the 1/4" wide groove between no.1's inlet/ex?

"Turbo's make torque, and torque makes fun"

"did you know you can toast potato waffles?"

Thanks Joey...I think that is what I am starting to think as well....

It would be awesome if someone could comfirm the markings on the MG Tubro Metro Cam?

the mg metro turbo cam is the same cam thats in any of the non performance stock 1275's, its nothing special at all

"Turbo's make torque, and torque makes fun"

"did you know you can toast potato waffles?"

Hey Joey, I just noticed you posted this:

“theyre are 2, the na type and the turbo type, best to confirm which sort your after (a couple of months ago i didnt and ended up buying the wrong one off someone)”

to my request for a cam in the WANTED section. What were the markings on the wrong cam? I want to be sure I know I am getting the right one.

i dont think there are any markings on the std 1275/turbo cam, there wernt anyon the one shane sent me anyhow

"Turbo's make torque, and torque makes fun"

"did you know you can toast potato waffles?"

What about a SW5 or Kent 266 for the 998T? That is if you can't get a good second hand NA MG.

There isnt, I just checked, both the cams I have removed from metro turbo blocks are the same.
Shane

Steve (Benross) thinks the 266 is a contender for big bores, no one (as far as I know) has tried it in a big bore yet, I think(?) Wil_h has tried an sw5, or maybe it was one of the ozzy lads, but they didnt rate it all that much?

There is a specific thread on just this in the 998 section that has covered alot of this ground already Mike, have a search bud

"Turbo's make torque, and torque makes fun"

"did you know you can toast potato waffles?"

HI mike and welcome to turbominis buddy

T3 Tone has a kent 266 fitted to his 1380 monster and with just!!.... 13 psi of boost, sports 184 bhp

its right big overlap cams are not needed in turbo engines

i would use the N/A MG cam in your 1098 if you on a budget but my first choice, would be a kent 266

hope Wil-h comes on and tells us what cam he is running in his BLISTERING ! .......998cc ...... 150 bhp monster!

Edited by BENROSS on 19th Jan, 2008.

Just out of curiosity what does the “N/A” stand for?

naturally aspirated (as opposed to forced induction i.e. turbo'd/supercharged)

"Turbo's make torque, and torque makes fun"

"did you know you can toast potato waffles?"

N/A or NA is Normally Aspirated i.e. non-turbo

I run Kent 500 (more commonly known as the MG metro (non-turbo) cam in all my 998 turbos (soon to be 3) timings as stated above (In. 16/56, Ex.59/29).

This cam with 1.5s will happily get you to 8k rpm if you wanted it, without the 1.5, it's more tractable and will easily get you to 7k on a mild tune.

The PH2 didn't work in our car, the 1.5s didn't help, but it was nearly impossible to get off the line and boost threshold was very bad compared to the MG cam.

As with most cams you tend to sacrifice low down power or top end. The PH2 was too big a compromise low down compared to the small gains high up in the rev range.

I think the 266 or SW5 could work, but as MG cams are available for £15 and do what I need I've never tried anything else after the disappointment of the PH2.

Fastest 998 mini in the world? 13.05 1/4 mile 106mph

Great information THANKS….

I think you guys have convinced me that the MG Cam is now my first choice (if I could find one for £15… that would be freakn awesome), second choice would be the Kent 500. The ph2 is out…

mike PM RICHI from newcastle on this forum asap he has dozens

this gent will help you out buddy :)

dont forget to use new followers

Wil. Where did you time the MG cam? 108??

I will PM RICHI...which I am assuming is RICHIE.

Edited by Mikes1098 on 19th Jan, 2008.