Cantonracer: The exhaust was flowed with a pipe, so thats why the numbers seem alittle high, other then that, they are a set of TEA ported heads that they used on one of their 95 camaros.

lt11997: I dont understand what you mean about having #5 and #7 crossed? I followed the diagram in the hayes manual.

93 4mula: From the top fully put together like this is impossible...i think anyway, i will be installing it from the bottom with headers and all.

TCAL95Z: DIdn't have to do anything speical to get the dampener on, just line up the keyway, the holes are designed so they only line up one way according to ATI, so its stupid proof.

 

So were my heads....seriously...those numbers are way to high for a stock LT1 casting with a 1.56 valve. A very well ported set of LT1 castings are in the 210 range normally with a pipe.

Not flaming you...but I would be concerned if you get a custom cam based off those numbers.

Vendors have been known to inflate their numbers big time. When I had my heads flowed I was right there.

 

I think he means they are not in the wrong order but with black wires like those I can't tell if they are or not.



Check to see if they are in that order. Thanx shoebox for the pic!

 

Thanks for the pic hsyr, i gotta go check this out....

Cantonracer: All i know is this was a set of personel heads they cnc ported and used on one of there race cars, i have the flow sheet somewhere. The exhaust side like i said was flowed with a pipe, so it is what it is, I have the flow sheet somewhere with the .001 to .006 numbers. Maybe they did some welding or something in the exhaust to get'em to flow like this? not sure, im not a porter.

 

If you are using normal LT's...telling you...I would concerned.

 

With forged internals I would definitely spray more than a 150 shot. Assuming you have a supporting fuel system. That is a nice looking engine

 

Thanks for the info


I had heard that some of them had to be machined or shimed to get them to line up with the other pulleys.

Let us know how that thing runs it looks great

 

It's called inductive firing, the firing order is 1-8-4-3-6-5-7-2. If you look at the firing order 5 and 7 are next to each other and are also next to each other on the engine. For example the the voltage can cross from wire #5 to wire #7 and fire #7 when #5 is supposed to be fired. That is why I always cross my plug wires (not parallel with each other) the voltage can jump from one wire to the one next to it. I hope I explained this good enough for you.

 

The cam is similar to an LE3, with alittle gearing toward n2o. Even if the exhaust flow specs were inflated, then they would be right near the LE3 head specs, which would all work out anyway

 

Nicks flow numbers from my records

(exhaust without a pipe)

.100 70 56
.200 150 115
.300 210 164
.400 251 192
.500 268 200
.550 270 207
.600 276 210

CantonRacer,

I've delt with TEA heads before so I know what to expect out of the exhaust ports, he doesn't have anything to worry about. If anything he probably has more exhaust duration than he needs on that motor now. TEA flows everything with a pipe and on their odd style bench so the exhaust numbers are really high, but are actually quite normal when you compare them on a SF-600 without a pipe, but they are still dam good numbers.

Bret

 

Thanks Bret

 

Nice Setup! I will say that I think you should have went with standard JE/SRP rings or whatever the standard rings are from your piston manufacturer. I've had the Hell Fire's in the past and those things are just soo hard and stiff in the bores. The motor is really hard to turn over using the crank snout due to the drag. That being said, they seal up really nicely with nitrous, maybe at the expense of a little cylinder wear and will cost you 10-15rwhp on motor. If you used those rings, you should be planning for a 200+ shot of the juice. Keep us posted on the results!

 

the "hellfire" rings are made by JE, and were recomended by JE and my engine builder for this setup. I say I am going to be spraying 150...thats the least amount....like I said i can bump it upto 250, and in the future i will be boosting and spraying on this bottom end. Standard rings + boost/n2o = will prob work fine, but I have the "build it once" attitude.

 

Hey, I'm with you on the build it once perspective. And often times, as with anything, you get some positives and negatives with the parts that you choose. Just don't be too disappointed if the motor is a bit down on power N/A, with those rings, it will make good power on the gas and if the bottom end and tune is on, will handle a lot of it.

 

I was reading lots of posts and spoke to JE, there was really nothing i could find about it being down on power cus of the rings, or grinding into the cylinder walls cus they are harder. I think its a myth we should put in the box