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Whos used a BD14 exhaust cam

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Old 09-06-2011, 10:02 PM
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boost mad
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Default Whos used a BD14 exhaust cam

As title realy, just interested to know if it released much power and how much further up the rev range the power band went,

Just trying to get my head around a couple of things !
Old 09-06-2011, 10:07 PM
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J1mbo
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Depends completely on the rest of the spec, aswell as the timing, a bd14 ex can be very negative or very positive dependant on the above!
Old 09-06-2011, 10:11 PM
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STUCOS
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Had a bd14 in my last 2wd saff,pulled hard from 3500 to 7800

cheeRS stu
Old 10-06-2011, 07:42 AM
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boost mad
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Originally Posted by J1mbo
Depends completely on the rest of the spec, aswell as the timing, a bd14 ex can be very negative or very positive dependant on the above!
BD16 inlet
26.5mm inlet ports
T4
7.35:1

Old 10-06-2011, 09:30 AM
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My old 2wd ran twin 14's on a ported head, T34.48 & 803's. It only pulled 24psi, but used to pull really well, bottom end wasn't great, but held it's own against a lot of supposedly more powerful cars. As long as you dint mind the lack of midrange torque compared to a STD cam, they are great if you lime revving the engine.
Old 10-06-2011, 10:02 AM
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boost mad
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would it release much more power though or just move where the power band is?
Old 10-06-2011, 12:27 PM
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With that spec, if it has a good exhaust port aswell you would benefit from a bd14 ex, it will free it up so more revvy and will gain a bit of power

16/14 is a good combo
Old 10-06-2011, 01:32 PM
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boost mad
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what sort of size exhaust ports would you say Jimbo. i know its not just a out size ( so she keeps telling me) but shape too, but just so i have an idea. Neil Roper is going to be doing the work.

what sort of power/torque do you think this setup would make?
Old 10-06-2011, 01:45 PM
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Staffi
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Just slightly off topic, what power/torque can the Standard cams do?? would i be correct in thinking around 400ft/lb ??
Old 10-06-2011, 02:02 PM
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400 is fine on std cams.

i had a std exh cam in mine but the head was heavily ported. Was running a Mountune K2 inlet and was one of Harvey's 400 conversion - fucking awesome it was
Old 10-06-2011, 02:03 PM
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Plenty enough then Ran...
Old 10-06-2011, 02:17 PM
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JamesH
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More has been done on the standard exhaust cam than most would believe
Old 10-06-2011, 02:19 PM
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im sure 450 is possible with a std exh cam
Old 10-06-2011, 02:44 PM
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yes it is, you can do 500 on a std ex cam but its not as revvy, dosnt feel as good imho

after going out in one of our engines with 16/14 and a customes similar spec 16/std there is a big difference
Old 10-06-2011, 04:07 PM
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Ran, keep guessing
Old 10-06-2011, 05:31 PM
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500 Jimbo?? i didn't know that...
Old 10-06-2011, 05:40 PM
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Yes, but its better to get a cam in there for that power IMO
Old 10-06-2011, 06:11 PM
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i have 16/14 combo on mine tbh with my driving style prob not the best for me,as i am abit of a pussy and dont revving her to hard really need to keep her in the 5-8k rev band as thats where the power if
Old 10-06-2011, 06:14 PM
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Doug, you really need to drive it first...

Have you used the spacers yet buddy??
Old 10-06-2011, 06:17 PM
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Originally Posted by staffi
Doug, you really need to drive it first...

Have you used the spacers yet buddy??

she is insured now but has no plates and has no tax so i am getting there lol, i have not yet looked into the studs yet where did you get yours from?i presume reyland?
Old 10-06-2011, 06:19 PM
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i sure rod said he run a standard exhaust cam at 700bhp?
Old 10-06-2011, 06:21 PM
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What about standard Inlet Cam?? not Rod, just torque/power in general on one
Old 10-06-2011, 06:22 PM
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Originally Posted by mechanic28
i have not yet looked into the studs yet where did you get yours from?i presume reyland?

Yes matey..
Old 10-06-2011, 06:27 PM
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Originally Posted by staffi
Yes matey..

excellent so you going to the rr day
Old 10-06-2011, 09:07 PM
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next question would be is how far i can rev on hydraulic lifters then
Old 10-06-2011, 09:27 PM
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for a road car i would stick with standard sticks, for added brutality then add cams and time it properly, dont forget cams MUST have piston pockets otherwise valves and pistons kiss and touch............ mmmmmmmm lovely lol
Old 10-06-2011, 10:48 PM
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Originally Posted by staffi
500 Jimbo?? i didn't know that...
Originally Posted by mechanic28
i have 16/14 combo on mine tbh with my driving style prob not the best for me,as i am abit of a pussy and dont revving her to hard really need to keep her in the 5-8k rev band as thats where the power if
Pete,as mentioned above,Sheady will run a standard ex cam way over 550bhp.

Doug,my 16/14 combo,I think it's a little lazy coming on boost due to the bd14 ex cam,that's what Sheady said when he drove my car.I am going back to a standard ex cam with the bd16 inlet cam.

Thanks.Lee.
Old 10-06-2011, 11:01 PM
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Stu @ M Developments
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The BD14s duration makes it a poor exhaust cam choice in most situations.
Old 11-06-2011, 12:05 AM
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what would YOU sujest then Stu ?
Old 11-06-2011, 01:08 AM
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BD15 less duration than a BD14 but with more lift.
Rich
Old 11-06-2011, 07:38 AM
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Originally Posted by Stu @ M Developments
The BD14s duration makes it a poor exhaust cam choice in most situations.
T4 pulling 28psi at 3500 isn't bad with a 14 ex ?
Old 11-06-2011, 07:58 AM
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Originally Posted by J1mbo
T4 pulling 28psi at 3500 isn't bad with a 14 ex ?
yes we removed the 14 exhaust out of the 500 race car for a slightly smaller cam and made a whole lot of difference go to big on exhaust cams and yeh you might see power very late on but not full useable power
Old 11-06-2011, 08:49 AM
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Just built my mates engine yet to be mapped the spec is

0.5 Mahle pistons 7:2.1 with valve cut outs
wrc head gasket
Bd 16 inlet
Bd 14 exh
verniers
Sweedish plenium
2wd manifold
gt 30 (not sure if its a 3071 or 3076)
siemens 83lb

All lightend and balanced and arp bolts used all round.

What would this be like to drive will it be to laggy or should it be fine?
Old 11-06-2011, 09:38 AM
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Originally Posted by J1mbo
T4 pulling 28psi at 3500 isn't bad with a 14 ex ?
Peak cylinder pressure?
Old 11-06-2011, 10:38 AM
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Originally Posted by Jay_
yes we removed the 14 exhaust out of the 500 race car for a slightly smaller cam and made a whole lot of difference go to big on exhaust cams and yeh you might see power very late on but not full useable power
its all down to timing, that engine may have been a top endy engine

like i said, 3500 bd 14 ex and 28psi on a non bb t4 is excellent imho and it revs well peaking at 7k so why would you want a smaller cam ?
Old 11-06-2011, 10:39 AM
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Originally Posted by saph59tad
Peak cylinder pressure?
what about it fella?
Old 11-06-2011, 11:03 AM
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Originally Posted by J1mbo
what about it fella?
It was a guess at why Stu doesn't like a bd14 for exhaust but the quote missed the question.
Old 11-06-2011, 02:32 PM
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boost mad
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would a bd15 serve a better purpose with the shorter duration over the 14?
Old 11-06-2011, 05:32 PM
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Originally Posted by J1mbo
its all down to timing, that engine may have been a top endy engine

like i said, 3500 bd 14 ex and 28psi on a non bb t4 is excellent imho and it revs well peaking at 7k so why would you want a smaller cam ?
its all old hat now Jim and been proved not the best cam for the job ! after spendin a fair amount of time with Julian Godfrey and Scot with the spec on the brooklyns car being thrashed out i wouldnt use a 14 exhaust cam mate as they proved without doubt its not worth it
Old 11-06-2011, 06:11 PM
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Ok Jay fair enough, I'd completely disagree and say it's a very good choose of cam with the correct spec

So we will have to agree to disagree

Last edited by J1mbo; 11-06-2011 at 06:12 PM.


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