Stage one head...Which valves and cam?

Psydwynder · Post by **Psydwynder** » Thu Jun 11, 2009 3:52 pm

I have a stage one ported and polished head from howell automotive(yes it took forever to get it ... 8 months) Question is what size valves and cam do I need to use on a 2.2l stroker motor, has forged internals and about 8:1 compresion? The motor is getting a turbo system and I am setting up the head for that. I have read that the comp 400 is a good choice and I have a crane #12 now. Howell automotive has/had a couple higher stage heads with the valves and cam, should I just try to get one of those already assembled? Is there a way to have the head tested for cfm flow? I would think just go as big as possible on the valves but after a certain point the head can only flow so much air before the valve size is to big.

esteinmaier · Post by **esteinmaier** » Thu Jun 11, 2009 5:33 pm

The valves outflow the head already. I would leave the valve sizes alone.

hybrid-Srt2001 · Post by **hybrid-Srt2001** » Thu Jun 11, 2009 5:38 pm

stock valves with a good valve job 3-5 angle

comp 400 will be a good cam as far as off the shelf goes.

Psydwynder · Post by **Psydwynder** » Thu Jun 11, 2009 6:07 pm

Thanks... Good deal I already have a new set of valves for that head. I'm gonna bring it to my local machine shop and have a 5 angle valve job done. Now just need to order the comp 400. Gonna upgrade the springs and retainers too. Planning on getting a high quality head gasket for sure. Is there any other upgrades that I need to do to the top end other than that?

hybrid-Srt2001 · Post by **hybrid-Srt2001** » Thu Jun 11, 2009 6:10 pm

just gat new valve seals, good springs and gaskets.

only other thing is make sure the rockers are in good shape.

Psydwynder · Post by **Psydwynder** » Thu Jun 11, 2009 6:14 pm

I'm putting all new harware in the head. When I ordered it I got just the bare head. It's never been installed. Who do you recomend to get the hardware from? What type/brand of head gasket? Gonna be running some pretty high boost on it and spraying too.

srtjesse · Post by **srtjesse** » Thu Jun 11, 2009 7:12 pm

modern has some really good parts they got crane titanium springs and retainers for like 180 i think if im not mistaken

hybrid-Srt2001 · Post by **hybrid-Srt2001** » Thu Jun 11, 2009 7:23 pm

Psydwynder wrote:I'm putting all new harware in the head. When I ordered it I got just the bare head. It's never been installed. Who do you recomend to get the hardware from? What type/brand of head gasket? Gonna be running some pretty high boost on it and spraying too.

get the hardware new from mopar, and use arp head studs. cometic makes good head gaskets in about any thickness.

Post by **occasional demons** » Thu Jun 11, 2009 9:04 pm

hybrid-Srt2001 wrote: get the hardware new from mopar, and use arp head studs. cometic makes good head gaskets in about any thickness.

Assuming it's a SOHC head, The Magnum springs/retainers to be more specific. For a 400 cam, they will be plenty fine. (since the 400 really requires no upgrade for standard springs)

4884 058AA MSRP $5.40 ea. /$86.40 for the set.

Should be the spring/retainer. The Mag springs are sold with new retainers. They also feature the coils wound tighter at the bottom, to reduce reciprocating mass at the valve.

Psydwynder · Post by **Psydwynder** » Thu Jun 11, 2009 10:42 pm

Thanks for all the info...I have lil yellow post its with info and part numbers everywhere. Keeping in mind this engine is gonna have 8.6:1 compression pistons and a monster turbo system built by esteinmaier should I go bigger on lift and duration than the comp 400? I'll also probally be reving higher in the rpm range too, so what about valve float?

hybrid-Srt2001 · Post by **hybrid-Srt2001** » Thu Jun 11, 2009 10:47 pm

with upgraded valve springs, you shouldn't have to worry about valve float. I wouldn't take the mag springs past 7000 on a regular basis. If you plan to rev 7500+ i would recommend crower springs. I belive the max you can rev on megasquirt is like 8500, so even there you should be fine with crowers or even cranes. Honestly there isn't a real reason to rev beyond 7k anyways unless you run a monster turbo, which will leave you with no low end power.... Honestly i don't see that single cam doing much better than 400 hp anyways but i do wish you the best of luck.

Psydwynder · Post by **Psydwynder** » Thu Jun 11, 2009 11:54 pm

Guess I'm going with the crane springs and retainers, probally with a crane #14 turbo grind cam. And yeah its gonna be a monster. Gonna try and push it as far as I can, SOHC or not. I am gonna be starting a project thread soon. Look for the "Lil Red Rocket". Vroom or Boom one of the two.

hybrid-Srt2001 · Post by **hybrid-Srt2001** » Fri Jun 12, 2009 12:57 am

good luck finding a crane 14. crane shut down, and the 14 is not a turbo cam, the 12 is.

Post by **occasional demons** » Fri Jun 12, 2009 7:14 am

With enough turbo, the 14 will work. It's just going to take more RPM. Unless there is huge amounts of valve overlap, most cams will work with boost. When you are no longer relying atmospheric pressure to fill the cylinders, cam profiles don't mean as much. Not saying they're not important, just negated a little. Overlap is the biggest factor. You don't want all your boost going out the exhaust valve.

hybrid-Srt2001 · Post by **hybrid-Srt2001** » Fri Jun 12, 2009 9:46 am

my thoughts exactly

esteinmaier · Post by **esteinmaier** » Sun Jun 14, 2009 8:14 am

Actually, the bigger problem with overlap and turbo isn't blowing boost out the exhaust. It's sucking exhaust back in. Only in a perfect world do you have the same pressure in the exhaust manifold as you do in the intake manifold. Usually it's quite a bit more in the exhaust. As we all know, you can't burn air twice.

Post by **occasional demons** » Sun Jun 14, 2009 12:41 pm

Good point, I wasn't thinking of the back pressure between the tubine, and the valves. I guess I was thinking more along SC boost. I can't imagine there would be nearly as much backpressure for belt driven boost.

2GN.ORG

Stage one head...Which valves and cam?

Stage one head...Which valves and cam?

got it

all new harware... bare head

Re: all new harware... bare head

Re: all new harware... bare head

I have post it notes everywhere!!!

I'm gonna try