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[d112crzy]

So you're supposed to retard the cam after milling/decking to get it back to get the centerline at tdc?

[92CXyD]

So you're supposed to retard the cam after milling/decking to get it back to get the centerline at tdc?

I retard my cam 2 deg. b/c I decked my block 0.020".
Y8 head on z6 block had to advance the cam 4.5 deg.

So my total cam advance was 2.5 deg.

Hope this helps. ;D

[Joseph Davis]

So you're supposed to retard the cam after milling/decking to get it back to get the centerline at tdc?

Pretty much.  B-series are thrown off, as well, but it's typically at or under a degree whereas D-series are always off 2+ degrees.  With how the B-series is indifferent to cam timing when boosted it's not worth so much as looking at, unless you have early Prox cams that require you adjust them to even make the car idle.

[d112crzy]

No I was just wondering because a friend and I were discussing it yesterday. He milled his f22a head .035 and is having issues even just idling and he said he had advanced 5 degrees with no luck. I thought it was retard, but I just wasn't sure.

[danz]

i installed the cam, left the timing the same and no detonation..

only did one pull, it was a 5th gear pull on the highway and  i couldnt hear anything crazy

i also let out the MBC so its only hitting 15psi, but ill just ramp it up slowly and take it from there.



on a side note; the car pulls like -17inhg at idle.  lol

[d112crzy]

It's not too big of a cam then. My old 272 did about the same.

[danz]

ya its not too crazy at all but it feels pretty strong on only 15psi... almost as quick as the bisi at 20

[chris]

Amazingly the best sohc regrinds I have ever used were old man gude. The HCCS10 is a nasty cam.

[Joseph Davis]

That's not bad for a car that obviously needs an alignment and suspension work.  Solid 12 second NA D-series car with a little work.

[Joseph Davis]

What sort of dyno numbers is he claiming?  Because with how gutless the midrange on a D-series is going to be it probably needs a little top end to make the required power.

[Joseph Davis]

I'm going to call those numbers Dynojet numbers and not pick it apart any further.  I don't know the particulars of the setup (only really sifted the 1.4 liter build thread) but the power figure he mentions only calls for 130-135 wtq at 8000 rpms.  With 13.5:1 I can marginally believe that number, since the dyno sheets are gone I can't see the way it goes down but if it's super peaky and making that power right at 9000 rpms that's 118-120 wtq.  Getting the D16 to carry those numbers is the hard part, but a 1.4 is going to be more likely to do so. 

There's a LOT that would have to be going on with the ports and valvejob, but I think it could be done.  Not with *my* wallet, of course.

[danz]

well, i hit the dyno with the new cam.  i tried to retard the cam 2 degrees to see if it made the torque carry even BETTER but it just slowed the spool and lost down low. no improvements up top.  didnt have time to try 4 degrees.  mb next time.

the cam makes less peak torque but it carrys it much much better resulting in higher overall output. 

the bottle neck seems to be something other than the old bisi cam, but the new one helped.

new dyno




old dyno

[Joseph Davis]

If the power band falls off hard at either top or bottom end - or in your case, spool = midrange - then you have adjusted too far.

I wouldn't compare the Bisi cam to the stock cam's degree setting.  Likely the Bisi's been ground on an arbitrary index.

[92CXyD]

If the power band falls off hard at either top or bottom end - or in your case, spool = midrange - then you have adjusted too far.

I wouldn't compare the Bisi cam to the stock cam's degree setting.  Likely the Bisi's been ground on an arbitrary index.

So JD are you saying the Bisi cam should be degreed in when installing to get the most out it?

Or are you saying that those cams are junk?

[danz]

any aftermarket cam should be degreed imho...

comparing the two graphs, the bisi cam made some good torque!  if only i could have got it to CARRY that torque, i think it would have given me some decent power.

[Joseph Davis]

If the power band falls off hard at either top or bottom end - or in your case, spool = midrange - then you have adjusted too far.

I wouldn't compare the Bisi cam to the stock cam's degree setting.  Likely the Bisi's been ground on an arbitrary index.

So JD are you saying the Bisi cam should be degreed in when installing to get the most out it?

Degreed shmeed, you can do that with a timing light if you feel the need.  Verify your piston to valve clearances so you know where NOT to adjust, and then spin the cam for the best powerband.  

Or are you saying that those cams are junk?

No, but I am saying his turbo grinds are hit or miss.  I'm a little annoyed with them over this Y7 car - Bisi has publicly stated that all his cams undergo R&D and make proven gains but he told my guy that he'd sold 2-3 of the grinds but didn't know what sort of power it made as he hadn't heard anything back.   

[dvst8r]

Did you give Dave a kick when you were in at Miller?

[danz]

Degreed shmeed, you can do that with a timing light if you feel the need.

JD, the future of rapping.  watch out Drake.

Did you give Dave a kick when you were in at Miller?

ya, but i let him get back to his slave labor welding gig.  haha

[chris]

cough 74mm throttle body+spacer

[danz]

cough 74mm throttle body+spacer

cough sponsor me 

 





this new cam SMOKES the bisi cam all day

ran 11.51, previous best was 11.72

i am sure its got cageland in it with a little more seat time

[chris]

Ill cut you a smokin deal :yes:

[danz]

Ill cut you a smokin deal :yes:

PM'd




oh and i forgot to mention, i ended up taking out a degree of timing at peak torque and added 2-3 degrees up top. 

[Joseph Davis]

So what you are saying is Mustang dynos read lower than Dynapacks?

[danz]

So what you are saying is Mustang dynos read lower than Dynapacks?

i sure wonder.... 35ftlb less torque on my current dyno numbers, yet way better ET and picked up 4mph on average...

[chris]

Nice gains at the track. Pm sent regarding throttle body/spacer pricing up to canada.

[d112crzy]

No, but I am saying his turbo grinds are hit or miss.  I'm a little annoyed with them over this Y7 car - Bisi has publicly stated that all his cams undergo R&D and make proven gains but he told my guy that he'd sold 2-3 of the grinds but didn't know what sort of power it made as he hadn't heard anything back.  

He likes to talk up all of his products without any solid evidence that they even perform.


And yeah, fuck degreeing a cam. Just measure your clearances and play with the gear(s) to get the best combo. Degreeing will reduce the time it takes to get the cams dialed in, but it's also $200 less to spend for a degree kit(if you buy one, they're easy to make).

[d112crzy]

Post your graphs here
http://honda-tech.com/showthread.php?t=2217467&page=10