SSDude

If you add an ASP pulley you will be close to where you want to be.

muscratmauler

SORRY, forgot that one before. I do have an ASP pulley.

By the way while I'm here. I was wondering if you guys can help me. There is a very significant taping or ticking coming from the valvetrain (not exhaust leak)the only thing we can come up with is there could be a gap between the valve stem and the rocker. We used the same length pushrods so that should be o.k.

ANY HELP WOULD BE GREATLY APRECIATED!!!!!!!

This is very annoying

THANX

CHRISPY

did they use equal length intake and exhaust valves? Otherwise you will need different length pushrods <img border="0" title="" alt="[Smile]" src="gr_stretch.gif" />

muscratmauler

The head porter told me to use stock pushrods so I would say they are equal.

I'm reading another thread were a cam similar to mine, some guys say it sounds like a sewing machine. That is a good discription of mine also.
So if it is just the nature of the cam would adjustable rockers help?

thanx

CySevans

</font><blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr /><font size="2" face="Verdana, Helvetica, sans-serif">Originally posted by muscratmauler:
<strong> The head porter told me to use stock pushrods so I would say they are equal.

</strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">I hope you mean "stock length" and not "stock". Those stock ones bend pretty easily. I bent 6 of them with only 320 rwhp on a missed shift. That could explain your tapping sound.

Loudmouth LS1

iTrader: (10)

</font><blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr /><font size="2" face="Verdana, Helvetica, sans-serif">Originally posted by muscratmauler:
<strong> The head porter told me to use stock pushrods so I would say they are equal.

I'm reading another thread were a cam similar to mine, some guys say it sounds like a sewing machine. That is a good discription of mine also.
So if it is just the nature of the cam would adjustable rockers help?

thanx </strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">Dude, don't worry about it, the sewing machine noise is just normal valvetrain noise, I have it on my stock internal (only for a couple more weeks <img border="0" title="" alt="[Big Grin]" src="gr_grin.gif" /> ) Z28!!

LASTLS1

iTrader: (7)

First of all those are good numbers. with no dyno tricks. Besides I would suspect that cam was picked because of n20, witch it will work awesome! I wouldn't worry about posted dyno numbers unless the other dyno pulls were made on the same dyno the same day with the same dyno operator. Try the car out I bet it will run great. Good luck Andy

Phil99vette

iTrader: (11)

Those numbers are very respectable. I would be happy with them. Here is something I noticed
- The cars making 450+RWHP usually have cams >230degrees on the intake and exhaust lobe

- Cartek said in a post on the corvette forum that they needed to flycut the pistons for their 2x package, why would you have to flycut the pistons for a 224/228 cam?

-One guy from the corvettecorum had a H & C package done through a big vendor and made 449rwhp and was never told the specs until later.....232/236

- LG motorsports just released an even bigger 2x cam which is similar to the previous one.

Any comments on the cartek flycutting pistons for a 224/228 comment? <img border="0" title="" alt="[Confused]" src="images/icons/confused.gif" />
Phillip

JF WS6

</font><blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr /><font size="2" face="Verdana, Helvetica, sans-serif">Originally posted by phil97svt:
<strong>Any comments on the cartek flycutting pistons for a 224/228 comment? <img border="0" title="" alt="[Confused]" src="images/icons/confused.gif" />
Phillip </strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">Phil,

Yup, that means they are running a VERY high compression on that X2 package to require a flycut with a cam that size. I bet they're running like 11.8 or more for compression. It's pretty obvious now that the heads are heavily milled.

Phil99vette

iTrader: (11)

</font><blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr /><font size="2" face="Verdana, Helvetica, sans-serif">Originally posted by JF WS6:
<strong> </font><blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr /><font size="2" face="Verdana, Helvetica, sans-serif">Originally posted by phil97svt:
<strong>Any comments on the cartek flycutting pistons for a 224/228 comment? <img border="0" title="" alt="[Confused]" src="images/icons/confused.gif" />
Phillip </strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">Phil,

Yup, that means they are running a VERY high compression on that X2 package to require a flycut with a cam that size. I bet they're running like 11.8 or more for compression. It's pretty obvious now that the heads are heavily milled. </strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">No, I dont think that they run 11.8:1 cr because they are building H & C packages for people outside the NJ area..they need to live where they only have 91octane. Cartek says the CR is 11.1:1. I think the cam specs might not be correct at 224/228 for a 460rwhp 2x package.
Phillip

muscratmauler

WHILE this conversation isn't helping my valvetrain noise any. I do however have a theory on the Cartek cam. From what I remember them telling me it is a 224/228 .581/.581 113 LSA (very similar to mine). My piston to valve clearance was .080 intake and .120 exhaust. Now I'm not sure but I would say that the 1* more LSA would have the exhaust closing slightly later. However what I really think is; the duration at or near max. lift could be more, keeping the valves open longer. This is just a guess.

By the way when they tuned my car I asked Julio what kind of compression they were running on that package and he said something like mine.

Anyway this weekend we're checking the valve lash. I'm hoping it's a pretty big gap so longer push rods or adjustable rockers could make it tighter and hopefully quiet this thing down some.

Thanx for the comments guys

John