[F-BIRD'88]

Im thinkin your car should be in the 106 to 108 MPH zone. Thats my estimate.
It will run 12's Have you ever weighed that car? on a truck scale or junk yard scale?

accurate weight w driver.

[F-BIRD'88]

And AP72 is going to get out the credit card and ship you a shiny new set of AFR
Eliminators, for Christmas... cause he wants to see you use a better head....

[F-BIRD'88]

You could build your own long tube, side pipe style headers using the shorties and stuff you already got.
Nothin stopping you from getting creative in the garage. I build a whole custom dual exhaust system for my Firebird including my own custom built unique mufflers, starting with a $30 muffler case.
I think it's the long cold Canadian winters. Its just a bunch of cuting fitting grinding welding cussing and swearing and getting junk in your eyes....LOL

[ap72]

Originally Posted by F-BIRD'88

And AP72 is going to get out the credit card and ship you a shiny new set of AFR
Eliminators, for Christmas... cause he wants to see you use a better head....

No, he's a pretty tight-assed SOB, I wouldn't count on any donations.

However, there are some better heads on craigslist and can usually be picked up for less than $100 a set.

Vortecs, camel humps, converted LT1s, etc.

Then there's the import head market.

[F-BIRD'88]

IM thinkin flowmaster 4-2-1 collectors Flowmaster #250350 or similar as a start. Cut them up
They have these in various size combos.

What is the measured outside diameter of the primarys on the shorties?
what is the inside diameter of the side pipe tubes (Measured)

You can build a lot better than you can buy.

[F-BIRD'88]

Originally Posted by ap72

No, he's a pretty tight-assed SOB, I wouldn't count on any donations.

However, there are some better heads on craigslist and can usually be picked up for less than $100 a set.

Vortecs, camel humps, converted LT1s, etc.

Then there's the import head market.

ya dream on
anybody can build a $10,000 motor. Armchair quarterbacking is real easy.

You find these $100 ready to rock jewels and get his address in Ottawa and feel free.

[F-BIRD'88]

Is this the header you have? These are under $200

Hedman #68280

[hcompton]

Ap27 a lot of ppl use the 58 cc heads to make good power. I have herd that a 2.02 valve upgrade and good port work is almost as good as ported humps. The extra compression ratio makes up for a little less flow. Of course a set of 210 cc heads would be make some much bigger numbers and in a vette it will be usable power since its a light car geared and good stall. Too small a cam would also suck.

Gtech is not bad at all. Just got to be fully mounted in the car and not wobbly. Also use the gtech at the track then you will have something to compare once that is done you will find the gtech very accurate tool to test upgrades. It may be off a little but it should be off the same everytime. I have used them and found them to be dead on once compared to track and finding it was always 3 mph off. Timer is very accurate and is good way to do road testing. Iphone apps wprk too but they are not as accurate as the gtech or other real deal solutions on the market.

Never used the vericon but have used a radar gun turns out cops see someone on the side of the road with a radar gun they tend to stop and ask alot of questions just as you come flying past. LoL which can lead to my second peice of useful adive about the wind from your car blowing a state troopers hat off.

[F-BIRD'88]

2.02 valves should be avoided on the 416 heads. 1.94 and generous porting is best. 1.50 or 1.60 exhaust.
U use the radar gun inside the car. works right thru the windshield .and it will never read higher than your actual speed.unless you point it at a object that is moving too..1/8th mile testing is just as valid as 1/4 mile testing. but lower speed
The vericom gives you a lot of usefull data especially if you know how to interpret it all.
Every once in a while you get a bogus run, but that shows up clear, as you test.
Some things throw it way off... violent wheel hop... bad (solid core) spark plug wires. arcing conections in car. (bad switches)
error code is the result.

[F-BIRD'88]

Timed, radared acceleration up a hill (long steep is best) marked out up hill distance is good. speeds are not high.
much like a road dyno. And the track is never too far away.
By the way with this cool little Lunati cam you are going to want to get in the car and drive it,,, a lot.

[bygddy]

Lol.....I have the same argument daily at my shop with one of my apprentices....he runs procomp alum on his regal with a 355 roller cam.......I have looked through the notes on his build. And he is sitting around around 10.2 compression as it sits. So his next genius idea is a 4-71 blower.....wich I love the idea, just not with his compression, or his little 670 vacuum sec Carb. He was all bashing my junk yard stuff today....and I tried to explain, that without race gas, his compression is going to be too high to utilize the blower for what it can actually do. By the time he takes enough timing and boost out of it to stop it from eating itself. I'm still going to be faster on junk or used parts....his 700 trans, his 373 gear....its a great fair ground cruiser....and his procomps are not newer better style, they are a few years old when flow and quality control was worse then it is today.....ohhhh....I can't wait till spring lol.

[bygddy]

Originally Posted by F-BIRD'88

Is this the header you have? These are under $200

Hedman #68280

No, I have flowtechs that stop right at the top of my oil pan. Then it goes to 3" mandrel bent to the sidepipes, 3.5 spiralflows, and 3" to the rear tire....I would love a set of these or equivalent but not sure if these will perform how I want

Maximizer Exhaust Header Side Mount Pipe 63 82 Corvette C2 C3 SBC | eBay

[F-BIRD'88]

for $600 you can do a lot of fabbing. Create your own 4-2-1 step long tubes w side pipes.

running 2 2.25 secondary pipes from the headers-ist Y to the side pipes 2nd Y collector is easier than 4 primaries.
The long tube 4-2-1 Y collector configuration using the flowmaster 4-2-1 Y collectors is very effective.

[F-BIRD'88]

I'm having trouble picturing 3.5" spiral flows to a 3" side pipe.
The "muffler" insert goes in the 3" side pipe. If the flow tech shorties are not 1.5" primarys you can use them as the start/primary. Some of those shortys have small pri tubes size. should be 1.625" outside dia minimum.

The hedmans are a good buy and can be customized too.

this is the basic 4-2-1 long tube Y collector configuration

[F-BIRD'88]

Paint the 305 heads with aluminum spray paint and really mess with his head.