9 replies to this topic

[daenesh]

hey guys sorry if this topic is a bit daft but ive been searching the Internet with no luck and i would like to know what are the main differences between a 1098 cam and a 1275 cam.. like the timing, lobe, lift and all that.. thanks guys

[jaydee]

There are so many 'standard' 1275 camshafts..
Please elaborate your question

[daenesh]

How about a standard A series 1275gt camshaft as a comparison... I just want to know how it fares as I've heard people saying good things abt the 1098 cams

[ACDodd]

How about you send me your 1098 cam, I'll measure it then be able to exactly compare what you have to any other cam I have figures for?

[bmcecosse]

Bit tricky since he is in Malaysia..... The 'original' 1275 cam was same timing and lift as a 1098 cam (AEA 300) but had 1/2" wide lobes rather than 3/8" wide lobes. As above - there are several 1275 cams - so hard to compare unless you have a particular one in mind. But the only really useful one will be an MG Metro cam.......

[ACDodd]

Need the verify split overlap lift. If it is 0.040" then it is the same cam as the stock 1275 gt item.

Ac

[daenesh]

i get what you're saying guys.. cause when i fitted my 1098 cam into my 998.. we used a vernier caliper and the 1098 cam had higher peaks than the 1275 camshaft.. i think the 1275 camshaft was an old 1275gt block.. let me see if i have some pictures of the cams...

[daenesh]

here some pictures of the two cams i compared

[Vipernoir]

Two raised rings and a 3/8" lobe indicate it is the same cam as an Auto Mini, 1100 Mk2 Sprite or a Mk1 Midget - 230/252 in/ex with .250 lift at the lobe.

Three raised rings might be a 731, though I think they were also used on a later cam in a different position, possibly an early MG Metro.

[daenesh]

brilliant stuff vipernoir.. well if thats true what ur saying then i do have a 1100 cam.. and now i have some info to use as comparison.. thanks