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-   -   1971 Buick 455 GS F/SA G/SA Build (https://classracer.com/classforum/showthread.php?t=63449)

Shadylane 12-09-2017 08:49 PM
Re: 1971 Buick 455 GS F/SA G/SA Build
 
...

MR DERBY CITY 12-10-2017 11:00 AM
Re: 1971 Buick 455 GS F/SA G/SA Build
 
Quote:
Originally Posted by Shadylane (Post 551426)
I wouldn't trust what Fast Freddie says, he gets most of his information from either Don Kennedy or Bobby D. :D
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.....

SSGN 01-13-2018 10:08 AM
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.

HP HUNTER 01-14-2018 01:25 PM
Re: 1971 Buick 455 GS F/SA G/SA Build
 
Quote:
Originally Posted by SSGN (Post 553650)
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.
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!

SSGN 01-14-2018 04:24 PM
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.

HP HUNTER 10-09-2019 07:57 PM
Re: 1971 Buick 455 GS F/SA G/SA Build
 
1 Attachment(s)
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.

Dan Fahey 10-09-2019 10:21 PM
Re: 1971 Buick 455 GS F/SA G/SA Build
 
Quote:
Originally Posted by HP HUNTER (Post 599486)
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.
What does that do to the crank?
D

HP HUNTER 10-09-2019 11:34 PM
Re: 1971 Buick 455 GS F/SA G/SA Build
 
Quote:
Originally Posted by Dan Fahey (Post 599490)
What does that do to the crank?
D
Surface hardens the crank.

Mark Yacavone 10-09-2019 11:52 PM
Re: 1971 Buick 455 GS F/SA G/SA Build
 
Still a good deal for the short block. The pistons cost more than that.

Dave Noll 10-11-2019 02:28 PM
Re: 1971 Buick 455 GS F/SA G/SA Build
 
Quote:
Originally Posted by HP HUNTER (Post 599486)
I will be nitrating the crank this time as well.
Who does that ?


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