Ported Headers Question

[esinger]

I recently bought a pair of ported heads from a friend of mine. He thought I should ask a few questions before installing them.

The first question is whether or not to use the steel shim gaskets on them. He thought they may be a little too forgiving of knock. The fear is that they wouldn't blow and instead mess up the bottom end of the engine.

The next question is whether to stick with the stock valve springs or use higher pound springs.

Thanks

 

[BRAD_PADGETT]

I don't know if this will help. I used Felpro 1000 gaskets. Valve Spring info is:

Valve Spring Make- #3200
Diameter/Type- 1.260 single w/ damp
Valve spring Height(int/exh)- 1.800/1.800
Valve spring seat pressure(int/exh)- 110#/110#
Valve spring open pressure(int/exh) 290# @-450#/lift

This info is from my build sheet. Good Luck- Brad

 

[esinger]

Thanks Brad!

Ported "Heads" is what I meant in the subject. Another Dee-Da-Dee moment on my part

 

[conn84gn]

I also used the Felpro 1000 head gasket

 

[Jerryl]

Eric,

The steel shim gaskets are good gaskets.
They will blow with enough KR. Don't ask me how I know. :wink:
If you get the tune right, and monitor KR, you should not need to worry about gaskets.

In addition, "if" the steel shims blow, you won't need to drop the oil pan to remove the debri.

Regarding the valve springs:
Use Comp 980 springs without the damper. These are a bit higher than stock pressures. If you go with any stronger springs on a flat tappet cam (Ass-uming you have this), you risk ruining the cam and possibly the motor.

Take it easy. :biggrin:

 

[esinger]

Cam Question

Recently sent the heads off to be cleaned up and checked out. Before I sent them off I flowed them. The intake side is around 179 and the exhaust side is around 136.

After the heads are back from the shop, I'm looking to get a cam to match them. Any suggestions?

Thanks!

 

[Jerryl]

Recently sent the heads off to be cleaned up and checked out. Before I sent them off I flowed them. The intake side is around 179 and the exhaust side is around 136.

After the heads are back from the shop, I'm looking to get a cam to match them. Any suggestions?

Thanks!

What RPM are you planning to shift and what is the 0/0 stall of your converter?

Edit:
Found "some" info .... http://www.turbobuick.com/forums/ho...06455-why-hotair-cars-slow-2.html#post1488357

 

[esinger]

The stall on the converter is 3000 RPM. I'm thinking that a 5000 RPM shift would be good.

Thanks

 

[Jerryl]

The stall on the converter is 3000 RPM. I'm thinking that a 5000 RPM shift would be good.

Thanks

Speedpro 204/214

 

[boostmaster]

Heads and Cam

Recently sent the heads off to be cleaned up and checked out. Before I sent them off I flowed them. The intake side is around 179 and the exhaust side is around 136.

After the heads are back from the shop, I'm looking to get a cam to match them. Any suggestions?

Thanks!

The stall on the converter is 3000 RPM. I'm thinking that a 5000 RPM shift would be good.

Thanks

Eric,

The steel shim gaskets are good gaskets.

Ditto

Regarding the valve springs:
Use Comp 980 springs without the damper. These are a bit higher than stock pressures. If you go with any stronger springs on a flat tappet cam (Ass-uming you have this), you risk ruining the cam and possibly the motor.

Speedpro 204/214

Ditto


Get ready to drop .40 to .60 off your time slips !!!!

 

[esinger]

Is the Speed Pro a 3/4 or Full race cam :biggrin:

So after doing some searching, what I'm looking for is a Speed Pro CS1016R that I should be able to special order from a local Autozone and a set of Comp 980-12 springs.

Is this correct?

Eric

PS: If I can get to the mid 7's in the 1/8th I'd die a happy man

 

[boostmaster]

Is the Speed Pro a 3/4 or Full race cam :biggrin:

So after doing some searching, what I'm looking for is a Speed Pro CS1016R that I should be able to special order from a local Autozone and a set of Comp 980-12 springs.

Is this correct?

Yes that is the correct part no. and to answer the question the term 3/4 or full race cam is way 1970's out dated. Will jsut say it's a good street cam with nice manners on the street but pulls like a mother on the track.


Like I said without the addition of a cam typically a good set of heads will net you between .40-.60 in the quarter if properly tuned at the same boost level you are running right now, but you will need to up your fuel pressure though or run some really good gas. Don't waste your time with pump gas and alky for now put some race gas in it and go then fool around with your street tune after making your best passes ever. I don't know what you run now but those numbers are typical for most so subtract them from your best times. You maybe even squeak out another couple of tenths by turning the boost up. I know for a fact I dropped .60 in the quater at lower boost with heads I bought from Lee Thompson that had similar flow numbers to yours but they flowed a tad bit higher on the exhaust side.

 

[esinger]

Just joking on the race cam stuff

My best pass so far has been 8.18 at 86 MPH in the 1/8th, so subtracting .40 to .60 would definitely put me right at my goal. This will probably put me at the end of what I want to do with the engine and I'll move on to other things like good tires.
My friend Pat has be hounding me to get some decent tires on my car instead of making my runs with Pep Boy futuras, so they will be next BTW, our local PepBoys just closed down so my racing tires will have to change anyway

Thanks!

 

[Jerryl]

Recently sent the heads off to be cleaned up and checked out. Before I sent them off I flowed them. The intake side is around 179 and the exhaust side is around 136.

After the heads are back from the shop, I'm looking to get a cam to match them. Any suggestions?

Thanks!

I got some ported heads last year (not yet installed), ported to ensure mid range flow.
Intake flow is rated right around 210@0.450 and exhaust 175.
So, I would think that your ported heads would flow much higher than that.
I will install sometime next fall

I also contacted COMP Cams and the 204/218 112 LSA / 108CL is right around $200. This is a custom grind.
A roller cam would be right around $300 for the cam.

 

[esinger]

There you go Jerryl making me all jealous with your ported heads. I’ve already been jealous over all that glistening your GN is putting off in that photo.

The ported heads I have will probably flow a little bitter after they are back from the shop, but I don’t think they’ll improve anywhere near that amount.

 

[Jerryl]

There you go Jerryl making me all jealous with your ported heads. I’ve already been jealous over all that glistening your GN is putting off in that photo.

The ported heads I have will probably flow a little bitter after they are back from the shop, but I don’t think they’ll improve anywhere near that amount.

Eric,
It will be VERY hard for me to impress you with "Go Fast Parts".
They are "just that".

Now, if you are talking about the "glistering GN", that is something to be proud of , NOT the heads.

This is by no means a D*** swinging contest.
To me, it is about perseverance and "Personal Goal achievement".

Keep up the good work!

 

[boostmaster]

heads

I got some ported heads last year (not yet installed), ported to ensure mid range flow.
Intake flow is rated right around 210@0.450 and exhaust 175.
So, I would think that your ported heads would flow much higher than that.
I will install sometime next fall


Not trying to belittle you at Jerryl but I think you should note that head flow is largely dependent upon the type of flow bench used the conditions in which they were tested and the operator. That is why you get some guys on here who have monster flow no's and others that don't but the end result will be the same. Now if Esinger was to send you his head to be flowed where you got yours done or vise versa I'm sure the numbers would not be that far off. So don't get too caught up in the flow number game.

 

[boostmaster]

Just joking on the race cam stuff

My best pass so far has been 8.18 at 86 MPH in the 1/8th, so subtracting .40 to .60 would definitely put me right at my goal. This will probably put me at the end of what I want to do with the engine and I'll move on to other things like good tires.
My friend Pat has be hounding me to get some decent tires on my car instead of making my runs with Pep Boy futuras, so they will be next BTW, our local PepBoys just closed down so my racing tires will have to change anyway

Thanks!

To make a true comparison test make your first runs with your Pep Boys tires then bolt on the slicks since traction has a great effect on ET.

 

[Jerryl]

Not trying to belittle you at Jerryl but I think you should note that head flow is largely dependent upon the type of flow bench used the conditions in which they were tested and the operator. That is why you get some guys on here who have monster flow no's and others that don't but the end result will be the same. Now if Esinger was to send you his head to be flowed where you got yours done or vise versa I'm sure the numbers would not be that far off. So don't get too caught up in the flow number game.

Agree 200%
This was "supposedly" done "side by side" to some Champion Irons.
I consider those "The stadard" since there is a LOT of data available.
Dunno .......... Mine look as opened up as the Champions is all I can say.

200 to 175 CFM is about a 13% variance.
It can happen but, IMHO, too big of a variance for anyone who even remotely knows how to test, AND, has a baseline / calibration unit.
There are tricks to "skew" the data, but ....... If I paid someone who does this for a living, I would like to see at least a "real 200" number.

I also realize is is not just about flow, and there is MUCH more involved.
All I was trying to say is that stock heads are rated around 160 (If I recall correctly), so I would expect much better numbers than 175 on the intake on just about any ported head.

 

[esinger]

To me, it is about perseverance and "Personal Goal achievement".

I'm 100% with you Jerryl. It seems like eternity since the first time I took my GN to the track. I can't remember the MPH, but I do remember the 10.5 second pass in the 1/8th.

Every time I go to the track with some of my other turbo V6 buddies, they are almost always faster than I am and that doesn't bother me because I have my own agenda which doesn’t make a difference whether there’s zero or 2,000 cars at the track that day.

On the flowing of the heads, I’d be more than happy to flow your heads on the same bench that I did mine. I can’t promise that my heads and yours don’t get mixed up