Re: 1971 Buick 455 GS F/SA G/SA Build
 

Dwight,

I see, and in this case it works out the same. In actuality, NHRA would multiply the 11.85 Index times a factor of 1.0517. It's an inverse relationship, but due to the number of decimal points the math is carried to, there can be a difference of a hundredth in the factors.

Jerry

Re: 1971 Buick 455 GS F/SA G/SA Build
 

After racing the Buick, the first time in competition I noticed the car would lose oil pressure during hard braking in the lights, so I had my fabricator modify the factory oil pan for more capacity and better oil control, although its not finished yet here are some preliminary pictures.

Re: 1971 Buick 455 GS F/SA G/SA Build
 

i was not aware we could modify the oil pans that much

Re: 1971 Buick 455 GS F/SA G/SA Build
 

Mines mild from what I've seen. But, when 4 different people tell you its not legal its time to go back to the drawing board.

Re: 1971 Buick 455 GS F/SA G/SA Build
 

You can't .....these pics only belong on a thread dated April 1st....

Re: 1971 Buick 455 GS F/SA G/SA Build
 

thanks

Re: 1971 Buick 455 GS F/SA G/SA Build
 

Superstock oil pan?

Re: 1971 Buick 455 GS F/SA G/SA Build
 

Paint it black. Lol

Re: 1971 Buick 455 GS F/SA G/SA Build
 

...

Re: 1971 Buick 455 GS F/SA G/SA Build
 

Yes, you are correct. I believe the info came from Fred Rector.....

Re: 1971 Buick 455 GS F/SA G/SA Build
 

...

Re: 1971 Buick 455 GS F/SA G/SA Build
 

I hear ya Mr. Shady. Riding SHOTGUN in a race car on an old country road is a little far fetched for me too......This thread has been officially hijacked.....

Re: 1971 Buick 455 GS F/SA G/SA Build
 

Mark
I see your running a HEI and no spark box, and I don't see a pcv?? Have you tried other set ups?? Just curious because on my street cars both showed HP on the dyno.

Re: 1971 Buick 455 GS F/SA G/SA Build
 

I ran the HEI because I had not had a chance to rewire the car yet, and the fuel system seemed more important to me with the time I had to work with. Same with the testing, time was limited. What exactly did you see with the PCV valve, if you don't mind. Trying to get everything legal for this season. My oil pressure drop situation in the lights kept me from working on the metric trans along with a gear change. I've never even tuned on the car at the track or tried my other carbs. I will say this, the 1 time I've raced the car it put me in the winners circle!

Re: 1971 Buick 455 GS F/SA G/SA Build
 

We tried a few things with the PCV, one was as stock with it in a breather and the other side vented. We vented the passenger side. We also tried 2 pcv and no vent, showed HP on the dyno but no et difference. The pcv in the end of the breather that you have worked the best as the breather acted like an oil separator. This is how I set up my street cars also.

Re: 1971 Buick 455 GS F/SA G/SA Build
 

After finishing the year with a best of 1.01 under the F/SA index losing some MPH since the engine was first built, I suspect the short block of being tired I plan to build a new short block and change the trans this winter. Of course I will post pictures as I go, followed with a dyno test with data, followed with a track test. I need to make a decision on the bore size and piston to wall clearance, I think I've got a handle on the bearing clearance from my previous testing. I will be nitrating the crank this time as well.

Re: 1971 Buick 455 GS F/SA G/SA Build
 

What does that do to the crank?
D

Re: 1971 Buick 455 GS F/SA G/SA Build
 

Surface hardens the crank.

Re: 1971 Buick 455 GS F/SA G/SA Build
 

Still a good deal for the short block. The pistons cost more than that.

Re: 1971 Buick 455 GS F/SA G/SA Build
 

Who does that ?

Re: 1971 Buick 455 GS F/SA G/SA Build
 

Theres a operation in Phoenix, but I would use Winberg in Denver just because I live close.