6a/Kr Cams

The 9a cams are differnt to the Kr but what about the 6a are they differnt again?

which would be better to get regound to performance cams ?

 

same inlet and exhaust as 9A engine:

inlet: 027 109 021 AL (milder than KR)
exhasut: 027 109 022 G (same for KR,9A,6A)

KR cams are a good compromise IMO, spend the money elsewhere

David.

 

i have a complete kr engine and a 6a engine just thinking about getting some cams reprofiled

 

I put KR cams straight into my 6A

 

what cam can u swap on the kr is it the zaust or the inlet? so you have 2 of the same ones

 

You can use the exhaust cam as an inlet cam if you remachine the chain wheel but it's not worth it, the KR cams are just fine IMO.

Joe

 

dont you get more tourqe from the cam swap ?

 

I have no proof but I think Vince at Stealth says it's a good mod on a 1.8 but pointless on a 2.0 as you have the torque already, it's part of the 2.0 head design.

Also heard rumours it can make your idle a bit lumpy and other such problems.

Joe

 

I'm with Joe on this. The KR cams in a 2.0 are just fine.

If you still want more power after fitting KR cams then a gas flowed head is the best route.

 

Ideally you want a better flowing head to make the most from cams,but Keithmac has got good results (+10bhp) from using Kent 1602r's in a standard KR

One day I'll get round to getting a head flowed and try some Newman grinds based on Schrick split durations.....

I've been saying that the last 2 years mind

 

i have a ported head already which im going to fit whats your thoughts on newman was speaking about these today and it was pointed out that you cant make a high lift cam from a cam that aint already a highlift one so they say they are based on a schrick but they aint really got the same lift and duration

 

I've looked into it

This is from David Newman himself

I can Grind your Cams to the Split Timings you require however I can only obtain .405 Lift on a Regrind which should be more than adequate for the use we discussed as most over the Shrick profile are quite radical on lift and they give a heavy tickover.

Regards David Newman

KR cams lift is 9.6mm -, the Newmans re-grind will give 10.2mm (pukka Schricks 0.453" 11.5mm)

 

what about regrinding the old cams that came out of your 9A? (or my 6A to be more honest ) i imagine it'll be the same.

what sort of price would he be charging you Gary?

 

i think he is under 200 what about kent regound cams anythoughts on these what would be the best profiles to have on a 2L block

 

Newmans are 175 + vat a pair for 16v cams. Turn round is a week.

 

has anyone got any first hand info on the newman cams ?