I just Bought a 1986 Camaro it was TPI, but now is carberated.Whoever had it before me put a Rochester Q-jet carberator and a Edelbrock S.P.2-P Intake manifold (made around 1976). If there anyone who knows if that manifold is any good please let me know. I just bought a Edelbrock Performace series 1405 Carberator 600cfm (got it cheap). My next thing is I wanted to know what the gear ratio was. My car should have either a 2.73 or a 3.23. A buddy of mine says jack the rear end up mark your tire and your driveshaft and count how many times the drive shaft spins to 1 turn of the tire. So I do that and my driveshaft spins 1.25 times for 1 spin of the tire, I say to myself nah somethings gotta be wrong here. So if I did this wrong please let me know. Im not a total idiot when it comes to cars but Im new at trying to build a good fast 1, so I will take any advice I can get except sell it and buy a Ford. I have more but this is my first post here so I'll get to that stuff later...

 

http://www.thirdgen.org/ spend some time here

 

look up the RPO codes, that should tell you the ratio. IF nothing else, pull the cover off and look for it to be stamped into the ring gear, orr you can count the teeth.

There is no way your drive shaft is only turning one and a quarter times for every full turn of the tire. Try it again. lol

 

Oh man, I remember that manifold. SP2P=Small Port Dual Plane. It was a real good manifold at the time, and still isn't too bad depending on your application. It's a low-mid range manifold, giving good bottom end torque. If you intend on wanting a lot of h.p./torque beyond 4,000 rpm though, that manifold is going to be somewhat restrictive. But if your engine isn't going to rev a lot higher than that, then you might as well use it. I assume the price was right?
As for your rearend, it sounds like you may have an open diff? Give it the twirl test again, but this time leave one of the rear tires on the ground and see what you get. And you might get a more accurate reading if you turn the driveshaft instead of the wheel.

 

im sure you do, considering im sure you also remember the release of the Model-T.. haha sry i saw an opportunity to bash on you, and since mike and scott dont seem to be here anymore, its just me and you to make fun of each other..

 

Ha, ha, smart ***! OK, so I was in high school back when that manifold came out. The model T was released in 1908. You do the math....if you can!

 

soooo your saying that manifold came out in 1908.. and that makes youuuu 115-119 years old? wow im impressed

 

Hmmmmm....modern math!!!
Next time take your shoes off so you can also use your toes to count.

 

Im going to go out and try it again.

 

9 bolt or 10 bolt?