weight difference afr vs stock LT1
Thread Starter
Le Mans Master
Joined: Apr 2000
Posts: 5,713
Likes: 105
From: Manassas VA
weight difference afr vs stock LT1
It seems awhile back there was a post asking about the difference in weight between the heads. Well I have a set of scales that I use for selling freon and trust me 
they are accurate.
But at any rate here are the weights of the 1057 head (AFR LT1 210cc 65 cc chambers) 27lbs 7oz. The stock ported head weighed 23lbs 5.5oz.
So the difference in weight is only 8lbs 3oz. for the set. And actually compared to stock unported head, would probably be slightly less then that.
they are accurate.But at any rate here are the weights of the 1057 head (AFR LT1 210cc 65 cc chambers) 27lbs 7oz. The stock ported head weighed 23lbs 5.5oz.
So the difference in weight is only 8lbs 3oz. for the set. And actually compared to stock unported head, would probably be slightly less then that.
Race Director
Joined: Sep 2001
Posts: 14,682
Likes: 753
From: NEwhere Ohio
It seems awhile back there was a post asking about the difference in weight between the heads. Well I have a set of scales that I use for selling freon and trust me they are accurate.
But at any rate here are the weights of the 1057 head (AFR LT1 210cc 65 cc chambers) 27lbs 7oz. The stock ported head weighed 23lbs 5.5oz.
So the difference in weight is only 8lbs 3oz. for the set. And actually compared to stock unported head, would probably be slightly less then that.
they are accurate.But at any rate here are the weights of the 1057 head (AFR LT1 210cc 65 cc chambers) 27lbs 7oz. The stock ported head weighed 23lbs 5.5oz.
So the difference in weight is only 8lbs 3oz. for the set. And actually compared to stock unported head, would probably be slightly less then that.
Id like to see better C4 options for weight reduction.
Ex. a titanium exhaust, better availability (and cheaper) carbon fiber hoods / body panels, maybe AFR should make the heads out of titanium or something.
When your goals are to compete/ beat the latest c5/c6 then you need everything you can get.
As for me dieting, its not an option. There'd be nothing left of me !
Team Owner
Joined: Oct 2004
Posts: 81,241
Likes: 3,063
From: altered state
St. Jude Donor '05
Little things add up but really worrying about a few lbs/ozs?
Unless your going for a land speed record...oh wait they add weight to those cars.
(Ill take those 8 lbs for the performance boost any day.)
nice to see some info for the sake of general knowledge though
Unless your going for a land speed record...oh wait they add weight to those cars.
(Ill take those 8 lbs for the performance boost any day.)
nice to see some info for the sake of general knowledge though
Last edited by cv67; May 15, 2012 at 11:44 PM.
Racer
Joined: Sep 2007
Posts: 493
Likes: 0
From: Eden Utah
Wholly crap man, have you figured the horsepower gain with the AFR's vs the weight of the stock ***** heads. You keep the stock heads, port the crap out of them, spend a fortune for a few extra horsepower, then line up with a car with AFR's...Then see what the 8 lbs get you.
Thread Starter
Le Mans Master
Joined: Apr 2000
Posts: 5,713
Likes: 105
From: Manassas VA
Oh Im not complaining about the weight difference. In fact, it makes for a much stronger head. (IMO) Its just I remember someone questioned the difference on here once, I had both heads sitting in front of me and a very accurate set of scales to weigh them with. So I posted my results.
Melting Slicks
Joined: Dec 2008
Posts: 2,772
Likes: 64
From: Mystic CT
every ounce of weight counts. 8 lbs might not seem like a lot, but add 8 lbs for that, 10 extra lbs for your 3" exhaust, 40 to 60 extra lbs for your rollcage, and stuff adds up.
Id like to see better C4 options for weight reduction.
Ex. a titanium exhaust, better availability (and cheaper) carbon fiber hoods / body panels, maybe AFR should make the heads out of titanium or something.
When your goals are to compete/ beat the latest c5/c6 then you need everything you can get.
As for me dieting, its not an option. There'd be nothing left of me !
Id like to see better C4 options for weight reduction.
Ex. a titanium exhaust, better availability (and cheaper) carbon fiber hoods / body panels, maybe AFR should make the heads out of titanium or something.
When your goals are to compete/ beat the latest c5/c6 then you need everything you can get.
As for me dieting, its not an option. There'd be nothing left of me !
The lightweight wheels tires and brakes are a bigger deal beyond just the weight, there is also the pwer lost spinning them up to speed.
Dave
Drifting
Joined: Aug 2000
Posts: 1,614
Likes: 0
From: Colleyville Texas
It seems awhile back there was a post asking about the difference in weight between the heads. Well I have a set of scales that I use for selling freon and trust me they are accurate.
But at any rate here are the weights of the 1057 head (AFR LT1 210cc 65 cc chambers) 27lbs 7oz. The stock ported head weighed 23lbs 5.5oz.
So the difference in weight is only 8lbs 3oz. for the set. And actually compared to stock unported head, would probably be slightly less then that.
they are accurate.But at any rate here are the weights of the 1057 head (AFR LT1 210cc 65 cc chambers) 27lbs 7oz. The stock ported head weighed 23lbs 5.5oz.
So the difference in weight is only 8lbs 3oz. for the set. And actually compared to stock unported head, would probably be slightly less then that.
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Race Director
Joined: Sep 2001
Posts: 14,682
Likes: 753
From: NEwhere Ohio
I assume you have no passenger seat carpets radio heater AC spare tire wipers washers headlights or motors carbon fiber drivers seat with a fixed track lightweight wheels and brakes etc will not bore everyone by going on and on. Personally I will trade 8 lbs for 50 hp and 50 ft lbs.
The lightweight wheels tires and brakes are a bigger deal beyond just the weight, there is also the pwer lost spinning them up to speed.
Dave
The lightweight wheels tires and brakes are a bigger deal beyond just the weight, there is also the pwer lost spinning them up to speed.
Dave
I also run the 96 grandsport GS wheels (lightweight forged aluminum) w/ P315/35R17 out back.
Ive resisted the vanity urges of 18", 19", wheels etc. for better wheel 'looks'. I am a tire engineer and know that the extra inch or two in size increases wheel weight and also DECREASES contact patch (side to side is the same, but front to rear is decreased with say... a P315/30R18 vs. a P315/35R17 when loaded during a launch-type situation.
I also dump the passenger seat for a quick 40 lb weight loss.
Funny you mention the 8lbs weight hit. Yes, I did put on AFR heads this spring (just fired it up yesterday). I will let everyone here now if those 8 lbs were worth it;
Comp ported afr 195 cc heads from a guy here on the forum....for an amazing price, with an amazing fast build time!
Drifting
Joined: Feb 2008
Posts: 1,267
Likes: 27
From: Texas
What is the deck thickness between the two?
With boost or nitrous, what everyone should be running, the added thickness of most aftermarket heads is worth any weight better heads can add.
I need some TF's to replace my beast of Dart Iron Eagles. Will check that weight difference when the time comes.
With boost or nitrous, what everyone should be running, the added thickness of most aftermarket heads is worth any weight better heads can add.
I need some TF's to replace my beast of Dart Iron Eagles. Will check that weight difference when the time comes.
Race Director
Joined: Sep 2001
Posts: 14,682
Likes: 753
From: NEwhere Ohio
What is the deck thickness between the two?
With boost or nitrous, what everyone should be running, the added thickness of most aftermarket heads is worth any weight better heads can add.
I need some TF's to replace my beast of Dart Iron Eagles. Will check that weight difference when the time comes.
With boost or nitrous, what everyone should be running, the added thickness of most aftermarket heads is worth any weight better heads can add.
I need some TF's to replace my beast of Dart Iron Eagles. Will check that weight difference when the time comes.
My motor runs so cool (w/ 160F stat, and fan settings) that there is little risk of 'warpage'.
I never had an issue with stock heads and 'mild' (11 psi max) boost or 'mild' nitrous (100 shot NX wet).
Make me understand why thicker deck is so useful, because I just think of it as a 'weight-adder'
