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Author Topic: Camshaft regrinding  (Read 1923 times)

Offline Khare

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Camshaft regrinding
« on: 16 February 2011, 17:39 »
Just read on another thread that the ABF responds well to the inlet cam being regrinded. Called a local machinist shop and they said that I'd need to know the spec I'd want it grinded. What does the ABF respond well to inlet cam-wise? They also said the cost would be "a couple of hundred"....For a little more I'd buy aftermarket cams so I'm not sure on that price. I'm going to call a different shop tomorrow and see what their price is, if not then I'll ask around for recommended specialists  :smiley:
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Offline javalin

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Re: Camshaft regrinding
« Reply #1 on: 16 February 2011, 19:36 »
surely if you grind an existing cam all you can do is reduce the lift / duration?
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Offline Khare

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Re: Camshaft regrinding
« Reply #2 on: 16 February 2011, 19:39 »
Quote from: javalin on 16 February 2011, 19:36
surely if you grind an existing cam all you can do is reduce the lift / duration?

Nope. I don't know exactly how it's done, but the original cams can be ground to a new specification.
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Offline Wayne

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Re: Camshaft regrinding
« Reply #3 on: 16 February 2011, 19:52 »
Pm sent with some info  :lipsrsealed:
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Offline Ess_Three

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Re: Camshaft regrinding
« Reply #4 on: 16 February 2011, 20:18 »
Quote from: Khare on 16 February 2011, 19:39
Nope. I don't know exactly how it's done, but the original cams can be ground to a new specification.

You grind the base centre diameter down, to leave the lobe sitting higher...of course, you can only go so far before the BCD gets too small for the follower to adjust to...and you are limited to the profile of the lobe depending on what's there to begin with.

For an ABF running Digi 3.2 and a Cat/lambda, you really want lots of lift, and semi-limited duration.
Pointless throwing in 300 degree cams with 10.5mm lift...far better with 268 cams and 11.7mm lift (for example)

Potentially a re-grind will give more lift, and standard-ish duration...which should work. If the lifters will cope.
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Offline Len

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Re: Camshaft regrinding
« Reply #5 on: 17 February 2011, 09:56 »
Not satisfied with 155bhp then!  :grin:
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Offline Khare

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Re: Camshaft regrinding
« Reply #6 on: 17 February 2011, 11:04 »
Power is never enough  :tongue:
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Offline Len

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Re: Camshaft regrinding
« Reply #7 on: 17 February 2011, 13:16 »
You know what can happen playing with cams! Just look at Adam! :rolleyes:

 :grin:
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Offline Khare

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Re: Camshaft regrinding
« Reply #8 on: 17 February 2011, 13:19 »
Quote from: Len on 17 February 2011, 13:16
You know what can happen playing with cams! Just look at Adam! :rolleyes:

 :grin:

That's because TSR handled his engine  :grin:

My 8v surprised many at the RR with the kent cam  :wink:
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Offline Paul86S2

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Re: Camshaft regrinding
« Reply #9 on: 17 February 2011, 21:48 »
Danny was selling a set of reground abf cams recently.

Paul
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