A6 head. Cam worth it?
 

So I'm building this d16a6 with vitara's and I-beams. It'll probably end up between 8 and 8.5ish:1 compression when I'm done. This engine will be for road race, not drag race, so anything above ~250-270 whp will probably just be good for burning up my front tires, so thats what I'm aiming for, with a wide as possible powerband. The current turbo is a t3/t04e with a .48 stage1 exhaust side and a 46 trim compressor wheel (setup is on the bottom of this thread https://www.homemadeturbo.com/forum/...095#msg1214095 ). It spools around 3500 on my z6, so I think it should do the job pretty good.

Now I'm readin that the stock d16a6 valve springs takes a lot of beating, so slapping a cam in there and reving the piss out of it is supposedly ok, so it sounds like something I want. I've never driven a d16 with an aftermarket cam before, so I dont know how the powerband is affected. Is it just moved up, or does it get bigger? And if the turbo can deliver, when does a stock a6 cam stop making power?

And where can I get a cheap cam that doesnt require me to send them a core? I cant ship a cam from norway without getting raped at the post office.

Any ideas of how to build a 250whp d16a6 with a big as possible powerband that will last through 15-20 minutes sessions are welcome, actually. My head hurts now, I'm having trouble deciding what to do :p



Soemthing to look at while you're typing
http://fhm.no/image/81165/0/0/533
http://fhm.no/image/79896/0/0/533

Re: A6 head. Cam worth it?
 

i had a d15b2 with the bullfrogg 2624, converted to mpfi. that fucker screamed all the way to 8k with a decent amount of pull.... i was pretty suprised with it.

Re: A6 head. Cam worth it?
 

Was that with stock d15 springs? If it was, thats pretty awesome, d16 springs should be even "safer"... :6

Anyone know where the stock a6 cam stops making power? Cant find stock cam dyno charts anywhere, in fact I cant find a single a6 graph...

Re: A6 head. Cam worth it?
 

yes sir... i honestly felt pretty damn good up at that powerband.... even better with nitrous

Re: A6 head. Cam worth it?
 

a6 springs on a smaller regrind=rev to 10k and enjoy every second of it



stock camshaft peak power is based upon stock motor etc



b16a with itr cams stock=8200 peak
b16a with itr cams+port work+70mm tb+compression=9500


Look att the wheeze built by jeff frank 9000 rpm wheezzzzeeeeeee rips on stock 20 year old a6 springs. a6 springs=beefffffyyyy

Re: A6 head. Cam worth it?
 

delta 272 rips hard but i couldnt get the ------- idle antwhere decent on my a6 vitara build.


put stocker back in, idled fine but i missed the 272 everytime i drove it.

Re: A6 head. Cam worth it?
 

Great info! Thanks! I saw the thread a couple of times when I was searching around. Dont know why I didnt click it, but it was a good read for sure :y

Still need to figure out a way to get a core over to delta cams, though. Do you still have that delta cam laying around, 13th?

Re: A6 head. Cam worth it?
 

nah gave it to a friend for his carbed d15, he helps me out alot.


snag a cam off a site and mail it to delta, they are cool guys over there.

Re: A6 head. Cam worth it?
 

there is a delta right down the street fron my work I will see if I could find a cam

Re: A6 head. Cam worth it?
 

hmmm, well delta cam is one place. so "a" delta would be "the" delta in tacoma washington.

Re: A6 head. Cam worth it?
 

thought they might have had other location and yup in tacoma.

Re: A6 head. Cam worth it?
 

nah, nowheres else.

Re: A6 head. Cam worth it?
 

Find out how much it costs, I have 2 A6 cams

Re: A6 head. Cam worth it?
 

Will do once I get my funds up and running again. Just found out I might not have a job in the nearest future, so I guess I'll have to run what i got for a little while. :1 Luckily I still got my stock z6 head, so that'll do for now.

Re: A6 head. Cam worth it?
 

offer towdogg some cash for one of the ones he just mentioned.

i know he dosent need both of em.

or have your z6 cam reground all mean an nasty like

Re: A6 head. Cam worth it?
 

I will hook you up when we find out how much $ it costs, Those cams are just chilling in the basement.

I am down to make deals

Re: A6 head. Cam worth it?
 

Last time I got a cmashaft from them about a year ago it was around 90 shipped for a sohc

Re: A6 head. Cam worth it?
 

Cool! Towdogg: I'll send you a pm when I'm ready, probably in mid january. I'll have to get the engine home first, and open it to see if its ok before I make up my mind and start buying stuff. A6 head with a lumpy idle and no vtec sounds way more tempting to me then a stock z6 head, though :y

Re: A6 head. Cam worth it?
 

i run a Delta 272 in my turbo a6, t3/t4 .48a/r exhaust with a 60 trim compressor, and it has a nice broad powerband. power falls off pretty hard around 6800rpm though

Re: A6 head. Cam worth it?
 

I paid $178 for both my ls cams to be reground

Re: A6 head. Cam worth it?
 

I tried to search, but couldnt find any build thread, do you have one? Dyno graph or is it street tuned?

Re: A6 head. Cam worth it?
 

built motor, on a dyno

a6 block, .020 over
SRP 9:1 pistons
TT i-beams
decked block, .010 max
milled a6 head, same amount as block
z6 headgasket
Delta 272 cam
Blox IM
62mm tb

"mini-ram" manifold
t3/t4 .48/.60 60 trim
3" DP/3" exhaust

this was at 10.5-11psi IIRC, straight from my street tune, before any massaging on the dyno

Attachment 11934
Attachment 11935

Re: A6 head. Cam worth it?
 

What did you have your cam timing set to?

Re: A6 head. Cam worth it?
 

set it as close to 0 as i could with an AEM cam gear

Re: A6 head. Cam worth it?
 

Thanks for sharing!

Loving the torque graph, that must be a fun car on the streets or at the circuit, more than 3500 rpm of usable powerband :) Hoping to get something like that out of mine when I'm done.

Re: A6 head. Cam worth it?
 

ya its pretty fun, not super fast but im happy with it. running 20psi now, definitely rips up the tires :6

20psi, but my Greddy ebc wont hold boost for ----. dont know why, but it fluctuates between 15 and 22 like crazy. boost gauge needle is just a blur when it hits full boost bouncing back and forth

24.5" slicks set at 11pounds, spun like crazy, funky boost, and missed 3rd...ya im a shitty driver with all the excuses in the world :P

http://img.photobucket.com/albums/v2...os/th_1287.jpg