Clearance issues?

Nevermind the claying comments....sounds like this is a pretty standard setup these days especially people using even bigger cams now.....can someone please speak from experience & tell me if I am going to be okay?

(Head is milled 0.010"....and will be using Spoon 2 ply head gasket.)

How many degrees of cam adjustment will be safe...?


Thanks for your expertise!
<---- ready to party.

 

ugh, what kind of head/block do you have?

 

Type R complete.

 

cali gas..no matter what happens..get it tuned by a pro

 

well thats a given......probably Aries or Shawn......we'll see bout that next month.

For now I just want to know if this setup will have piston valve contact, if not zeroed out then how much can I tweak those gears before I got issues?

Thanks for the suggestions

Motor is together and will be going in this weekend.

 

bump for EVOL....who is the only help I got so far.

 

On a JUN 3 cams, ZERO on both side.

What valvespring are you using? Cause, its a cheap-o, don't missed shift or boom!

 

Well I have the Rocket Motorsports valvetrain......but don't think these were a good choice after all the indecision......I think they should suffice for now..though.....so not worried about valve float...just whether or not the combination of gasket, mill, and lobe will be disastrous.....or if I am overestimating ....how many degrees can I tune safely....

Thanks for the feedback.


Modified by flybert at 4:06 AM 11/13/2004

 

I would use a standard 3 layer headgasket. I don't think an extra .2 of compression (or wutever it is exactly) is worth taking a chance of having pistons playing pattycake with valves. Those cams are known for eating valves alive with heads that are milled. Since you didn't mill it very much at all you should be safe advancing the cam gears no more than 2 degrees. If you decide on using the 2 layer headgasket then forget adjusting the cam gears at all.

A usdm itr engine with jdm itr pistons has a 11.1:1 cr, and add a tenth or so on to that to account for the head being milled. Honestly a 2 layer headgasket won't be worth the possible trouble and headaches, but of course thats just my opinion.

Oh yeah, I'd only use JUN or Toda valvesprings. You probably know this, but since you milled your head your timing will be retarded, so you will have to advance it a certain amount (very small) to get it back to stock. So when I was talking about advancing your timing in the beginning of this post, I mean after you have already advanced it so it was back to stock.

 

Hmm...well now that the head is on I will leave the gasket....I figured I'd have to advance it just not sure if the difference will be extreme enough to warrant it for a ten thou mill.

<-----actually have JUN valvesprings....just liked the way the Rocket valvetrain had the retainers fit so nicely onto the spring where the JUNs couldn't find one that fit right...and I could only find people on HT who wanted like $500 for the JUN retainers.

Anyone know of a retainer that fits the jun springs nice excluding the high dollar jun retainers?

 

Man, don't spend bank on retainers. Save it, and use stock retainers. Anways, if your cam gears are set at 0,0, then your timing is not actually 0,0 right now. Its actually retarded (lol) a degree or two. You will need to advance each cam gear maybe 1 notch to get it back to the stock timing. From there, I would leave it to the hands of a professional tuner.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by flybert &raquo;</TD></TR><TR><TD CLASS="quote"> ....how many degrees can I tune safely....

Thanks for the feedback.


Modified by flybert at 4:06 AM 11/13/2004</TD></TR></TABLE>


0,0

 

You need to be more worried about valve to valve contact instead of valve to piston.. Degree them in since you have lowered the deck height with the thinner gasket.

 

Bert-O I know you back Rocket but what is your honest opinion of his valvetrain, more specifically the valvesprings?

When I had Alaniz pressure test them he said,"... wouldn't wish them on his worst enemy...but since he has no experience with them or Rocket he couldn't say for sure."

Well then he confirmed what I was thinking all along that too stiff a spring will rob power, accelerate rocker arm wear, and premature cam wear or failure...

What do you guys think?

Thanks for everyone's input thus far.

 

Hmm....I was pretty cautious of that valvetrain for that very reason.....kind of interesting seeing how your comment has generated no replies...

*cricket*

It sure would be nice to see someone elses thoughts on the subject.

Anyhow I think that the B18C with JDM ITR pistons, Spoon 2-ply, & JUN cams will be just fine as they are all off the shelf items.

As far as degrees you can advance the cams well thats a good question. I would ask your tuner.

Perhaps someone online has the same setup & can chime in for Flybert.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by gumtape_deathmatch &raquo;</TD></TR><TR><TD CLASS="quote">Hmm....I was pretty cautious of that valvetrain for that very reason.....kind of interesting seeing how your comment has generated no replies...

*cricket*

</TD></TR></TABLE>

Joe know his stuff, and I have heard these kind of comments ( but I would never post them on the net Joe is just looking out for the racers interest not a companies