75 Nova U/SA - Page 8

MikeMoller · 06-30-2015, 04:23 PM

Sooooo the new alternator setup worked well, but hard to tell if there was a performance pickup. Ran an 1/8 mile CCRA race and the air was really bad, 90+ degrees and very humid, first really bad air I have run in. One P/SA car that normally runs mid/low 8.0's in reasonable air was running high 8.2's, and I was at 9.56 twice. Took 2 degrees timing out and went slower. So I'm guessing based on the P/SA car I was losing at least .2 which would have put me at 9.36 in reasonable air(9.50 IHRA 1/8). No races coming up and weather is HOT so going to concentrate on header and converter mods for the time being.

Mark, the current headers are Hooker Headers#520-2451(several pics on JEGS) 1 5/8 prim 30" long 3" collector with 18 inches added. I don't think these are totally 'equal length' either. Test was to see if the merge stuff worked on the 'old' headers before I hacked up the hookers. So not going to hack them based on the test. And yes I am going to call Kenny.

Dwight Southerland · 06-30-2015, 05:24 PM

Quote:

Originally Posted by Mark Yacavone

True enough.It's a small carb.Same one Billy uses on his 307.
It feeds 45 less cubes though.
Less cam, but a bit more compression.
30 hp less , rating wise
It ought to run a half second under in decent air with headers, converter and such things maxed out......in my opinion.

????

Billy's 307 uses a 1.437" throttle bore carb like a 283; the 75 262 uses a 1.686" throttle bore carb like a 305/350. The 72 307 is rated at 171; the 75 262 is rated at 165.

Mark Yacavone · 06-30-2015, 05:36 PM

Quote:

Originally Posted by Dwight Southerland

????

Billy's 307 uses a 1.437" throttle bore carb like a 283; the 75 262 uses a 1.686" throttle bore carb like a 305/350. The 72 307 is rated at 171; the 75 262 is rated at 165.

I should have said same venturi size, which is smallest restriction, and what most look at for air flow comparision...FFFFFord air horns aside for a moment.

My mistake.I though Billy had a 1970 year model. Never looked at it too closely.
Should have looked it up on www.classracerinfo.com

I stand by whatever's left!

Billy Nees · 06-30-2015, 05:53 PM

Quote:

Originally Posted by Mark Yacavone

True enough.It's a small carb.Same one Billy uses on his 307.
It feeds 45 less cubes though.
Less cam, but a bit more compression.
30 hp less , rating wise
It ought to run a half second under in decent air with headers, converter and such things maxed out......in my opinion.

Mark, the 262 uses the large base 2G. Yes, it has the same venturi sizes but it has a much better airhorn.

Billy Nees · 06-30-2015, 05:58 PM

Quote:

Originally Posted by Mark Yacavone

My mistake.I though Billy had a 1970 year model.

All 307s use the small base 2G. Just like a 283. OBTW, I think that you're right about the 262. It should run much better than a 307.

THE LEGEND · 06-30-2015, 06:14 PM

Mike at that race I was only about .05 slow in the heat the 8.22 was a bad run. By the end of the night I was running low teens which was about right

Dwight Southerland · 06-30-2015, 06:51 PM

Quote:

Originally Posted by Billy Nees

All 307s use the small base 2G. Just like a 283. OBTW, I think that you're right about the 262. It should run much better than a 307.

SO, the 305 with 43 more cubic inches, a bit better camshaft, and a bigger venturi carb, is it better than the 262 even though it costs 15 hp?
(Not mentioning the nice heads on the 305)

Billy Nees · 06-30-2015, 07:09 PM

Quote:

Originally Posted by Dwight Southerland

SO, the 305 with 43 more cubic inches, a bit better camshaft, and a bigger venturi carb, is it better than the 262 even though it costs 15 hp?
(Not mentioning the nice heads on the 305)

The 305 and 262 heads are basically the same. AND the 76 262 gets the same carb as the 305! Only problem is the availability in the Monza only. I personally think that the 305 is a better deal but then, I'm the guy that did a 307!

Mark Yacavone · 06-30-2015, 07:16 PM

Quote:

Originally Posted by Billy Nees

All 307s use the small base 2G. Just like a 283. OBTW, I think that you're right about the 262. It should run much better than a 307.

Edit :
Gonna start the bidding at -.55...Who'll give -.60? -.55 .55 .55 going once...

MikeMoller · 06-30-2015, 10:47 PM

Quote:

Originally Posted by THE LEGEND

Mike at that race I was only about .05 slow in the heat the 8.22 was a bad run. By the end of the night I was running low teens which was about right

Chip, you just burst my bubble! LOL

06-30-2015, 04:23 PM	#71
MikeMoller Senior Member Join Date: May 2010 Location: Raleigh NC Posts: 628 Likes: 27 Liked 243 Times in 73 Posts	Re: 75 Nova U/SA Sooooo the new alternator setup worked well, but hard to tell if there was a performance pickup. Ran an 1/8 mile CCRA race and the air was really bad, 90+ degrees and very humid, first really bad air I have run in. One P/SA car that normally runs mid/low 8.0's in reasonable air was running high 8.2's, and I was at 9.56 twice. Took 2 degrees timing out and went slower. So I'm guessing based on the P/SA car I was losing at least .2 which would have put me at 9.36 in reasonable air(9.50 IHRA 1/8). No races coming up and weather is HOT so going to concentrate on header and converter mods for the time being. Mark, the current headers are Hooker Headers#520-2451(several pics on JEGS) 1 5/8 prim 30" long 3" collector with 18 inches added. I don't think these are totally 'equal length' either. Test was to see if the merge stuff worked on the 'old' headers before I hacked up the hookers. So not going to hack them based on the test. And yes I am going to call Kenny. __________________ Mike Moller NHRA 203 Q-R-T/SA Last edited by MikeMoller; 06-30-2015 at 04:30 PM.

06-30-2015, 06:14 PM	#76
THE LEGEND VIP Member Join Date: Aug 2002 Location: Fayetteville, n.c. Posts: 1,411 Likes: 0 Liked 1 Time in 1 Post	Re: 75 Nova U/SA Mike at that race I was only about .05 slow in the heat the 8.22 was a bad run. By the end of the night I was running low teens which was about right