Really low vac with 274 cams

[dsmgsx98]

So I installed some Dsm graveyard 274 reground cams strait up and trying to figure out why the my vacuum is at -8 at 900rpm. I thought they would still have a vac of around -12 to -14 can someone that has these cams help me out

 

[viperlp01]

Call me later boomer....

I have logs of those settings... The thing is I could run ANY timing. The damn car aways knocked for some reason. Part throttle was decent. I saw full spool on a stock 2.0 and my hx35 at like 3800 and with the stroker and cams I was seeing it at 4100ish. Something isn't right....

For the price that they sell at it is hard to beat. They are better than stock. But they are not on the level of the other billet cams out there... Hell my shop has an acount with Delta and sold there cams. But if someone is looking to make big power I say just hks 272 regrinds or something else.

I am running Kelfords now and will let you know how they perform.

 

[Boomdeeze]

Call me later boomer....

I have logs of those settings... The thing is I could run ANY timing. The damn car aways knocked for some reason. Part throttle was decent. I saw full spool on a stock 2.0 and my hx35 at like 3800 and with the stroker and cams I was seeing it at 4100ish. Something isn't right....

For the price that they sell at it is hard to beat. They are better than stock. But they are not on the level of the other billet cams out there...

I am running Kelfords now and will let you know how they perform.

I am talking about the vacuum that he is seeing with the timing like this. I had my car set to +2* on the exhaust and 0 on intake and my car barely had vacuum which led to me not having brakes. If my vacuum going up to 15 with these setting, I will be happy.

 

[dsmarmy777gst]

Nothing againt Jon at the graveyard but how it the F@ck does he know where they shine at... Of course your car is going to pull harder at 4k. You increased duration and lift. Most bigger turbos are spooling right in that range so thats where the torque is coming in. Give us some datalogs to show improvements in airflow and 70-90 times.

well Jon sells the cams so i'm sure he knows more than just the price whether he grinded them or not... and I dont know if you read my earlier posts but i've had these cams in for a while so I'm not saying I installed them and saw the difference in the powerband at 4k. I'm saying that i changed the degree on these cams and felt the difference, i also said the only true way to tell a difference is getting a dyno or doing some logs(didnt at the time due to a dead laptop). I'm not stupid I've been playing with different degrees and seeing how its reacting. I zerod the intake cam and retarded the exhaust 4 degrees which caused shitty vacuum and hard brakes. In the morning ill be just going back to the -2/+2.. I almost had 15 in vac when i had it set there, and no hard brakes. So i'll stick with that

 

[dsmgsx98]

have you tried -2* 0* and see what that feels like

 

[dsmarmy777gst]

have you tried -2* 0* and see what that feels like

No. I'll try it today.

 

[dsmgsx98]

you are the shit bro, thanks again

 

[dsmarmy777gst]

Haha so i'm about as retarded as my exhaust cam I accidentally/mistakenly advanced my exhaust and retarded my intake (i thought clockwise advanced/counter clockwise retarded).. obviously not! then it hit me that its the other way. So i did it right and my vacuum is almost 17!! idle is as good as gold, never wants to die. It hasnt ran this good since i had my BC 272s in there I still cant believe I had it backwards. Sorry!

 

[dsmgsx98]

Haha so i'm about as retarded as my exhaust cam I accidentally/mistakenly advanced my exhaust and retarded my intake (i thought clockwise advanced/counter clockwise retarded).. obviously not! then it hit me that its the other way. So i did it right and my vacuum is almost 17!! idle is as good as gold, never wants to die. It hasnt ran this good since i had my BC 272s in there I still cant believe I had it backwards. Sorry!

And how does it pull and what setting do you have it set on now...
I am lost bro...I thought that was how you advanced and retarded them....is it not????

 

[dsmarmy777gst]

I am lost bro...I thought that was how you advanced and retarded them....is it not????

Im saying I did I backwards the first time. So instead of retarding the exhaust 2* and advancing the intake 2* it was vice versa because i thought clockwise advanced and counter-clockwise retarded.. Ive had these gears for about 2 years and never even messed with them. Rookie mistake i guess but yes even with my first mistake i saw a difference in vacuum.

Honestly I dont feel a difference in how it pulled(from the previous setting). I only did a couple while i was driving to my buddies house. Gas is too expensive to keep doing pulls hahaha

 

[dsmgsx98]

So turning the gears to the right advances them and to the left retards them????

 

[dsmarmy777gst]

No turning it to the left will advance and right retards.

Check out this guys picture. He retarded the exhaust 3*

http://www.dsmtuners.com/forums/cyl...-4g64-w-4g63-head-question.html#post152506909

 

[rocafellafw]

I Wish I would of seen this thread before so I would of known I'm not the only person with these problems. I actually thought my timing was off all these months because of how low my vac was. I have "GV" 274's and I'm currently getting -8 vacuum at idle. My idle is 1100k, anything lower and it wants to die (just like everyone else said). I'm So happy to know cam gears should fix this problem. I will admit these cams make huge power up to (for me past 4200k) but they definitely do not suite my B16g at all, but I plan on upgrading my turbo eventually so I will probably keep them. Thanks dsmarmy and all others that posted this helpful info, I was actually going to try to sell these cams soon because of the problems I've been having.

a little side track from the vacuum problem, but is anyone running these cams with a big 16g?

I'm running this EXACT setup and I can say my vac is terrible without adjustable cam gears and the power band does not go well with my turbo, still is fun though when I do tach it up.


Thanks again guys !!

 

[dsmgsx98]

I am so lost how is turning it to the left advancing the timing when our motors turn clockwise or to the right. .so in my mind that's retarding it to the left or counter clockwise

 

[Boomdeeze]

I am so lost how is turning it to the left advancing the timing when our motors turn clockwise or to the right. .so in my mind that's retarding it to the left or counter clockwise

Ya im right with you man, I'm confused

 

[dsmarmy777gst]

I am so lost how is turning it to the left advancing the timing when our motors turn clockwise or to the right. .so in my mind that's retarding it to the left or counter clockwise

I thought the same thing. It makes more sense that advancing would be turning it clockwise since thats how are motors turn. Did u guys look at the other thread and see his pic? I hate to confuse u guys but that pic should clear it up.

 

[dsmgsx98]

I saw the pic. I tried to research images of can gears and most of the images of gears I saw had a A on the right side and a R on the left side of the timing marks

 

[dsmgsx98]

See what I am saying bro look at this link

 

[dsmarmy777gst]

Yeah that's how I was trying to think of it and I did the same thing with google images and surprisingly no help but once u get your hands on the adjustable gears it should make sense

 

[viperlp01]

well Jon sells the cams so i'm sure he knows more than just the price whether he grinded them or not... and I dont know if you read my earlier posts but i've had these cams in for a while so I'm not saying I installed them and saw the difference in the powerband at 4k. I'm saying that i changed the degree on these cams and felt the difference, i also said the only true way to tell a difference is getting a dyno or doing some logs(didnt at the time due to a dead laptop). I'm not stupid I've been playing with different degrees and seeing how its reacting. I zerod the intake cam and retarded the exhaust 4 degrees which caused shitty vacuum and hard brakes. In the morning ill be just going back to the -2/+2.. I almost had 15 in vac when i had it set there, and no hard brakes. So i'll stick with that

Tell me why Kelfords, HKS, GCS, Comp all have good vacuum when you throw the cam in. I haven't had any problems with the hks 272 regrinds but the 274 seems to be the problem regrind.

 

[dsmgsx98]

You must be logged in to view this image or video.

Check this bro

 

[dsmgsx98]

If you turn it right it advances the timing

 

[beihl304]

Well after I thought I was right then got confused and now realize I was wrong. Everyone disregard my last post haha.

 

[Boomdeeze]

Can someone clear this up, I am royally confused now. This thread was doing good but has now led to a whole bunch of confusion.

 

[JusMX141]

Advance = before. If you're paid in advance, it means you're getting paid before you're doing the service or transaction.

With that in mind, our engines rotate clockwise when looking at the front of the engine. Correct me if I'm wrong, but if you want the cam to open before it normally would at "0", then I believe you would have to turn the cam in the direction that the engine rotates....which is exactly what the marking on the cam gear in the photo a few posts back illustrates.

 

[dsmgsx98]

so this Guy in this link is wrong cause he says his exhaust can is retarded 3* degrees
http://www.dsmtuners.com/forums/cyl...-4g64-w-4g63-head-question.html#post152506909