Changing Cam next month, anything else I should do?

[Jon Brown]

Had my 400 rolling roaded and made 168.9bhp at the fly, was advised by Austec to change the Cam, and have the heads refaced and valves recut.

So I will be embarking on this next month and was wondering if there is anything else worth changing whilst im there, apart from the obvious chain, venier pulley and followers.

I was actually very happy with the result as I thought it was a bit slow.

Was going to use the V8 developments MC1,anyone had any experience with these?

Jon

[bigdods]

I'm no expert but I have seen a 400 with similar numbers caused by a blocked main cat. Pre-cat had escaped and was blocking the dustbin. Worth checking before embarking on an expensive cam change ?

What diagnostics point to the cam being the culprit apart from the loss of power ?

[Alexdaredevilz]

Agreed with bigdods haircutmike had a block cat and lost 70bhp

[K4TRV]

+1 !!

I had a pre-cat melt and found on top of main cat!! Get them to remove pre-cats since the manifolds are off!!

Also replace cam chain/followers (goes-without-saying???)

Check out oil pump & housing.

Check inlet trumpets are not loose!!

Change any flexible fuel injection flexible pipes.

I'm sure others will add to list??

HTH

Trev

[900T-R]

K4TRV said:

+1 !!


Also replace cam chain/followers (goes-without-saying???)

You'd think so but IME it can't hurt mentioning it, anyway. You don't want to do the same job twice in the course of a few thousand miles...

[Jon Brown]

Thanks, Ill check out the pre cats. Wouldnt mind saving a grand.

Are the pre cats in the Y piece? Ive had one of the manifolds off but not checked the cats

[bigdods]

pre cats are situated inside the exhaust mainfold, just after the point where the pipes go 4 into 1. They can come loose and find their way down the pipe onto the top of the main 'dustbin' cat which is inside the Y piece.

[Pupp]

Jon Brown said:

Thanks, Ill check out the pre cats. Wouldnt mind saving a grand.

So, is this cam being hand-hewn by high-class hookers on a rate, snacking on fully-expensed Beluga caviar between shifts, from solid platinum? 'kin needs to be if not...

[Dr Mike Oxgreen]

It definitely improves performance if the final finish on the cam surfaces is polished between the upper thighs of a 19-year-old virgin. I'd pay extra for that - especially if I could watch. Purely to ensure the quality of engineering, you understand.

[Chilliman]

Thats virtually off topic, and totally unecessary you pervert. Where can I get it done ?

[crisp500]

Chilliman said:

Thats virtually off topic, and totally unecessary you pervert. Where can I get it done ?

Group discount?

[Alexdaredevilz]

Put me down for one ;-)


Dr mike
Chiliman
Crisp500
Alexdaredevilz

[OldSkoolRS]

I'd like too buy one of these camshafts and I don't even own a TVR.