I came up on a great deal, but now I have a dilemma!

The SE1 aluminum head has a 64 cc combustion chamber and would give a 12.4:1 compression ratio.

 

Paul the pistons are flat top an stick out the deck 10 thousands, the deck is stock so I guess the only thing to measure would be the valve reliefs. I wonder if they make .060 gaskets. I have the MSD distributor and box.

 

Cometic will make anything you need for a price.
give them a call.

Figuring 71 cc chambers and 5 cc valve reliefs, a .060 head gasket gives you 11.75:1 SCR and a 8.00 DCR.

Are the combustion chambers polished?

Paul

 

why not just change the pistons and sell the ones in there ?

 

Joe here is what you do and you can keep everything you have
http://www.snowperformance.net/product.php?pk=77
I run this system.Call and talk to a rep they tested this for years on 12-1 motors no problems.
http://www.youtube.com/watch?v=m6l5Kve58aA

 

Joe

Here is something to consider based on possible future goals.
I'm suggesting this because I was originally expecting the pistons to be down in the bore and not above the deck.

Since the pistons stick above the deck you will always be wrestling with custom head gaskets
and with the flat top pistons you will not have the option of using a TA aluminum head and still be streetable
because of the resulting very high compression ratio.

Take Alan's suggestion and sell the flat tops since they are still new.
Then replace them with TA's Spherical dish.

All the concerns with pump gas is gone and you can have any head and cam combination you want, now and later.

Paul

 

I don't mind mixing some race gas for awhile until I get the TA aluminums but Paul your right that will actually bump up the compression even more because the heads have a lower cc. Probably have the same problem. Oh well I guess.

 

Steve that is something I've never heard of. I'll call and see what they have to say. I was thinking if I had to mix the 91 octane they have out here with the 100 octane race fuel it wouldn't be to much more anyway. the 100 octane is 5.99 and 91 is already 3.99 so a 4 to 1 mix shouldn't be too bad. Maybe 10 bucks more to fill up. I probably take the car out maybe once a week anyway.

 

Joe

The TA aluminum heads have a 64 cc chamber.
With flat top pistons sticking above the deck .010 and a .060 head gasket
the compression ratio is 12.7

Anyway as we discussed earlier with the cam installed straight up,
and a .060 head gasket you may be ok on the street with 93 octane gas.

Here is a list of important considerations to help make that happen.

During the summer under the hood air temps can reach 200 degrees so it is extremely important that the engine take in air from outside the engine compartment.

Use the TA high performance water pump along with a good radiator

Shroud the radiator fan. Even if you use electric fans they should be mounted on a shroud. This way every square inch of radiator sees airflow.

Paul

 

Joe

I have a few questions if you don't mind.

How often will this car be street driven
and how much track time will it see?

Which MSD box do you have?

Who did the port work on your heads and do you have any flow numbers?

Thanks

Paul

 

Joe this has been around 4ever WW2 fighter planes use it.Snow has boost juice 49% methanol 51% water.It cools the charge way down the mix increases octane.

 

Paul its the MSD 6a box with the blaster coil 2 and the MSD billet distributor. The heads are some Kenne Bell old school fully ported 71 replacement heads (1240149). I don't know how much they flow. Well I called TA today and found out the .073 head gasket is $250 and the .120 is $450. Thats waaaayyyyyy to much to pay for gaskets so I'm just gonna stick with the .040 felpro ones I have and mix 100 octane.

What do you guys think about the 1.65 roller rockers I am going to use. I was gonna use the 67 1.59 ratio rockers that I purchased a while back. Which one do you think will work better for this build?

I'm on the lookout for anyone with .050 thru .120 head gaskets so if anyone knows someone I am in the market.
Thanks Big Joe

 

Joe

One of the concerns with using the 1.65 ratio rocker with a hydraulic lifter is that it puts extra force on the lifter plunger and the lifter can pump down near 6000 rpm.

The compression ratio will be 12.4 with a .040 head gasket.

Paul

 

Paul I just pulled out the cam that was in the short block and the id says PE GS 108 S 605 on it. I think this is the poston 108 solid cam that has 600 lift. To much for my taste so I'll just throw in the 288-98H in there. This was definitely going to be a race engine before I got a hold of it.

 

Joe is that cam going to be for sale ?

 

Hi folks,

Regarding raising octate:

1. Where can one buy toluene?

2. Can we not mix a gallon or two of E-85 in the tank along with 93 octane? How much E-85 can we run and how much will it increase octane?

Thanks!

Best,

Ranger
Aiken, SC

 

Yes it is Eric and you will be first in line.

 

.040 felpro are kinda thin. Will you have enough clearance? Your compression is high enough that your pushing your luck as well. At least spray them with copper.

PM sent

 

Yea I think I'm gonna divi up n get the .073 gaskets. Drop compression almost a point. It will probably end up close to 11 to 1.

 

What do you guys think about the .050 head gaskets from sumitt? That should bring it down to close to 11 to 1 and there copper. Part number
SCE Gaskets 071385 - SCE Pro Copper Head Gaskets