I fianlly got tired of waiting........

[fierofanatic88]

Well the title says it. I sent my cam off today to comp to have a regrind done on it. I couldnt wait any longer for the two cams being "tested" to finally make it to production and into peoples hands. I should have it back in a week if everything goes well. Cant wait to finish this swap up and have it ready for spring/summer. BTW how many others have had a regrind done on their cam? Could you still use your stock PRs? I think I'm looking at around 206/212 for the new profile keeping the lift the same of course(rats... :wtf: ) So I'll let everone know how this turns out maybe others waiting of the others may change their minds. 125 shipped to my door is good for me.

[bszopi]

RE: I fianlly got tired of waiting........

Why did you keep the lift the same? Since you did, there is no need to change the pushrods. I changed my lift on my regrind and I ran stock pushrods. It might not have been ideal... if fact, I was in the process of checking pushrod lengths for new ones when I decided to swap in a 3400 instead. 206/212 should be a pretty nice cam. I was running a 214/214 and it was great on the top end, alittle lacking on the low end, and didn't enjoy idling when first started. The 206/212 is close to what I think would be a good street cam with a decent idle. Be interested to see how close I am to being right!!

When you get the cam back, send (or post) the specs and I'll add them to the list of regrinds we have on the site.

[RednBlack]

Pushrodders!.. Hmmmph!! :P

[fierofanatic88]

Re: RE: I fianlly got tired of waiting........

Why did you keep the lift the same? Since you did, there is no need to change the pushrods. I changed my lift on my regrind and I ran stock pushrods. It might not have been ideal... if fact, I was in the process of checking pushrod lengths for new ones when I decided to swap in a 3400 instead. 206/212 should be a pretty nice cam. I was running a 214/214 and it was great on the top end, alittle lacking on the low end, and didn't enjoy idling when first started. The 206/212 is close to what I think would be a good street cam with a decent idle. Be interested to see how close I am to being right!!

When you get the cam back, send (or post) the specs and I'll add them to the list of regrinds we have on the site.

Well we havent finalized the profile yet. They should have it friday and it is going to be checked out that day. Matt is the guy I spoke with. I didnt think you could increase lift or Lobe separation on a regrind. I guess I was wrong on the lift . How do they add lift to a regrind? Yeah I wanted a little more aggressive cam but nothing that was going to take away from its streetability. I am sorta doing a bunch at once. I have my 2000+ U/L intakes and heads, I got and exhaust off a 3400 minivan, Cam, custom 7730 OBDI setup. I was on the fence abot the cam for the longest time but finally gave in. Its to bad that this will be the first time the setup goes into the car. So I wont have any reference to what or where I gained the extra ponies. As soon as I get the cam back I will definitely give you the specs.

[bszopi]

RE: Re: RE: I fianlly got tired of waiting........

They increase lift by taking material off of the base circle on the back side. I'm actually trying to draw up a lobe in CAD right now which would allow me to put it into graphical terms. But basically, by taking materials off of the base circle, it effectively lowers the base point of the lifter, therefore "raising" the lift. The lifter still goes up the same amount as stock, it just goes down more. You cannot change the LSA though.

[robby1870]

RE: Re: RE: I fianlly got tired of waiting........

Real quick related question:

My buddy is wanting a reground cam for his 99 Dakota. I told him they increase the lift by taking material off the base circle, but I also told him custom length pushrods would be ideal. He then asked me how to figure out how long the new pushrods would need to be. I really didnt know. I would assume you just add the difference of the stock base circle radius to the original pushrod lenght to get the new one. Am I right? If not, how do you figure out the new length?

EDITL: Sorry for the brief highjack

[fierofanatic88]

Re: RE: Re: RE: I fianlly got tired of waiting........

Real quick related question:

My buddy is wanting a reground cam for his 99 Dakota. I told him they increase the lift by taking material off the base circle, but I also told him custom length pushrods would be ideal. He then asked me how to figure out how long the new pushrods would need to be. I really didnt know. I would assume you just add the difference of the stock base circle radius to the original pushrod lenght to get the new one. Am I right? If not, how do you figure out the new length?

EDITL: Sorry for the brief highjack

If you need to check for new PR's you can buy and adjustable PR to gauges the size you need.I think this gets a little more difficult when you use hyd. lifters though because you have to pump them up before you can get an accurate adjustment. Someone correct me if I'm wrong....

[bszopi]

RE: Re: RE: Re: RE: I fianlly got tired of waiting........

You are correct with the needing an adjustable pushrod. Unfortunately with a 3100, the only place you can get one that works is Crower. I have one which is currently being used by another member. I have a short, brief, unedited instruction on how to check for the correct length.

Not sure on the pumping up the lifters. I know I didn't when I started checking mine, and that may be one reason I was thinking I had a failed lifter... who knows. Maybe someone else can tell us for sure.

[fierofanatic88]

I know I read this somewhere. Here are a few links about lifter preload and PR adjustment.

http://www.4secondsflat.com/Hydraulic_lifter_cams.html

http://www.hotrod.com/techarticles/43418/index3.html

http://www.mustang50magazine.com/techarticles/18679/

[fierofanatic88]

Well I finally got the numbers back that comp is going to go with. It took a little longer because they had to profile the cam . I am going with
210 intake 218 exhaust and .46 total lift from .435(increased by .02 of based cirlce).Mat said it would take about another week to grind because only a select peolpe do these cams.
I'll keep you guys up to date on how it works.

[AaronGTR]

Hydraulic lifter pre-load adjustment is always something that's had me worried. Especially since the orignal rockers on my engine were self-aligning and self-adjusting so they required no special procedure to adjust the lifter pre-load. You just bolted the rocker and pedestal down and torqued it to spec. Since I switched to the roller rockers, it required adding guide plates and having custom heat treated pushrods made since the pushrod lengths on the 3400 were different than the ones the guide plates were used on.

I sent all the measurements to the company that was making my pushrods, and they sent me back some beatiful heat treated chromoly pushrods that were 1/16" shorter than the stock ones, doh! After they assured me they would be the right length. According the directions for my rockers though, the pushrod length could be changed somewhat, as long as the roller tip stayed within a certain area on the tip of the valve stem. I followed the precedure for adjusting the valve lash. I just hope I got the lifter pre-load right. It seemed to run fine anyway, and did so for some time. I get to do it all over again when the new cam gets here so I guess I'll get another chance to check my work.

[fierofanatic88]

Ok today was the first day I actually looked at the Cam card that came with the regrind and it gives a little more info than I previously shared. So here it is totally:
...................................Int............ ....Exh
Adv Dur ......................265...............273
Dur@.050.....................210..................LSA..112
Valve lift.......................460...............460
Valve timing................Int -7 BTDC.........37 ABDC
..................................Exh 41BBDC........-3 ATDC
I just put it in tonight I have given up on a previous thread to try to degree the cam right now. I'll just use the standard setup and research the timing chains later. I'm sure that this wont be the last time I drop the cradle on this car.
So now its on to the heads and intakes. Then the work begins
I'll keep everyone posted and after I get my ECU back and have it in the car and running I'll post a sound clip.

[bszopi]

Comparing those numbers to mine is quite interesting... Your exhaust advertised is 273, where mine was 274. Yet, your duration at 0.050" is 218 where mine was 214. Also, your valve lift is .460" (I'm guessing with 1.6 rockers?) where mine was 0.483".

Definately an increase over stock, which is 196 at 0.050" and valve lift of 0.437" with 1.6 rockers.

Still anxiously awaiting some running results!

[fierofanatic88]

Comparing those numbers to mine is quite interesting... Your exhaust advertised is 273, where mine was 274. Yet, your duration at 0.050" is 218 where mine was 214. Also, your valve lift is .460" (I'm guessing with 1.6 rockers?) where mine was 0.483".

Definately an increase over stock, which is 196 at 0.050" and valve lift of 0.437" with 1.6 rockers.

Still anxiously awaiting some running results!

Yes I have 1.6 rockers. I have been trying to get more work done on the engine but my wife is a week away from having our second son and I really havent had much time to work on the engine. Hopefully in the next couple of days I'll have a few hours each day.

[SappySE107]

If someone wants to write up a pushrod length checking article for us, with some pics if possible, we could surely use it. I have a new stock cam here that I want to send off somewhere later but im currently doing DOHC work so all the results off everyone else's grinds will really help me out. Do we have a list of other mods along with the cam grinds, vehicle/computer, stock program vs custom tuned, etc? I think a detailed chart would be of some real value here