Do you need to modify the head at all to fit a BD16 inlet cam?

And can a 16 be ran with standard springs or advised to run doubles?

 

Just my opinion, but the std cam causes valve/piston contact, so no way will you get away without pocketing the pistons on a BD16 cam.
I if doing it myself would likely use a decent set of new single springs, but would seek advice from the cam maker.
tabetha

 

Chris as above,gotta have cut outs in the pistons.
I got ISKY double valve springs in mine.Seek expert advise though I would.

Thanks.Lee.

 

I've heard that you need to modify the head when fitting a 16 not for the springs for the actual cam as someone had fitted one and it failed within 10 miles

 

Mine was fine and didn't mod the head in any way for the cam apart from double springs

If you are using a big turbocharger you will need to rev it to get the full potential so double springs are a very good idea

 

Thought you'd bought an AB07 Chris?

 

i am using a bd16 in my escort ,your pistons will need pocketing as well as use double valve springs i also had my valve spring seats machined so the springs do not become coil bound .

 

Our double springs fit a STD head

 

Yes James,you sell the Newmans springs which fit a standard head as you say,had to have my head machined to take the Iskys,wasn't a problem as the head was off for porting etc at the time.

James,going back to Brammers BD16 inlet cam,he will have to have cut outs in the pistons yes as I understand the case to be?Where as with an AB07 Ahmed inlet cam it is designed for engines without valve cut outs.

I am considering an AB07 exhaust cam for my car shortly.

Thanks.Lee.

 

After speaking to James i have completely had to re think the engine spec due to the levels at what the turbo will be working at so now i am looking at a BD16 and BD8 combination along with a long studded 200 bottom end with pocketed pistons - it will just take longer to do but.....

As i'm using a GT3076 i'm almost convinced that at higher revs the valves and pistons may touch.

 

What happrnd to keepimg the nice simple spec

 

Yes you deffo need pocketed pistons with a 16, I wouldn't even risk a 14 without.

 

I am considering an AB07 exhaust cam for my car shortly.

Thanks.Lee.[/QUOTE]

Exhaust doesn't need touching leave as std.
tabetha

 

Tab,I was gonna keep the standard ex cam,haven't decided yet, the AB07 Ahmed ex cam is just a option over the standard ex cam right now.

Thanks.Lee.

 

There you have it Chris, Must have heard it before the likes of Newmans come about so will not need to lower the spring seats by the sound of it

 

if you are fitting the bd16 and pocketing the pistons ect keep the standard compression with the gt30 it will drive so nice..

its what mine has and its sweet to drive for the spec

 

What rpm does yours peak at Mark? and what sort of power did yours return?

 

If you run the BD16 or BD16+ inlet with double springs is it fine to run the exhaust side with standard springs.

Also is the only difference between Newman springs and ISKY the diameter of the spring? i take it for ISKY you remove the standard valve spring seat and machine a seat within the head?

 

Yes Chris,u only need the inlet side if running a standard ex cam as far as I am aware,confirm with james though for sure.,mine has both though as I have the bd14 ex cam at the moment which is being replaced soon.

Thanks.Lee.

 

Double springs are advised when you want to start running to 8000rpm + regardless of the cam profile as you now have less time to shut the valve on every stroke.

 

i was told by jano(oddkid) that the head does nt need machineing for the new type of isky springs??

 

is there any benifacal gain over a bd14 to bd 16 , on a standard comp gt 30 powered motor ,

or does it simply put power further up the rev range ?


i think personally im looking at a cossie rich spec for my motor ,


stock ex and bd 14 on standard springs , vco's ect ,.

would there be a better cam choice ?

 

Beef, Rich uses Mark's inlet cam which gave good extra power on a BD14 - it's huge

 

He probably means these Newman Double Valve Springs.

 

no stu he 100% said isky springs,
he could nt comment on the newam springs as he s never used them .
this was a few weeks back i was chatting to him

 

I wasnt aware Isky had a new spring type to suit the YB, hence my assumption he meant these Newman ones.

 

My catcams doubble valve springs, doesn`t need any head work either