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Colin Wood
Colin Wood Associate Editor
11/3/20 8:00 a.m.
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Sponsored Content presented by Titan Fuel Tanks, Summit Racing and Mackin Industries.

There may not be a physical SEMA Show this year, but that hasn't stopped a number of brands from debuting their latest and greatest products. Here are five to check out. 

Large Capacity Fuel Tanks for Long Bed Chevrolet and GMC Trucks from Titan Fuel Tanks …

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350z247
350z247 New Reader
11/3/20 12:43 p.m.

"ideal for track day builds" with an iron block? I don't think so. Maybe as a base for a turbo drag car.

Driven5
Driven5 UltraDork
11/3/20 1:01 p.m.

In reply to 350z247 :

Because regardless of any other factors, engine block material is the difference between winning and losing at a track day...LOL

Patrick (Forum Supporter)
Patrick (Forum Supporter) GRM+ Memberand MegaDork
11/3/20 1:25 p.m.
Driven5 said:

In reply to 350z247 :

Because regardless of any other factors, engine block material is the difference between winning and losing at a track day...LOL

my iron block 5.3 240z is such a pig at 2430# wink

dean1484
dean1484 GRM+ Memberand MegaDork
11/3/20 3:24 p.m.

Thanks to those lug nuts I learned what Chromium-vanadium steel its today (From Wikipida)

Chromium-vanadium steel (symbol Cr-V or CrV; 6000-series SAE steel grades) is a group of steel alloys incorporating carbon (0.50%), manganese (0.70-0.90%), silicon (0.30%), chromium (0.80-1.10%), and vanadium (0.18%). Some forms can be used as high-speed steel.[1] Chromium and vanadium both make the steel more hardenable. Chromium also helps resist abrasion, oxidation, and corrosion.[2] Chromium and carbon can both improve elasticity.[3]

Tom Suddard
Tom Suddard GRM+ Memberand Director of Marketing & Digital Assets
11/3/20 4:01 p.m.

In reply to Patrick (Forum Supporter) :

You need an aluminum block so you can have a lightweight race car like my 3000 lb. LS-swapped Z-car.

Wait...

Jesse Ransom (FFS)
Jesse Ransom (FFS) GRM+ Memberand UltimaDork
11/3/20 4:20 p.m.

What's the weight difference between aluminum and iron LSs?

I figure there are enough aluminum ones that it makes sense to lose weight that way if you care unless the price difference is really big, or the actual weight difference is small.

Javelin (Forum Supporter)
Javelin (Forum Supporter) GRM+ Memberand MegaDork
11/3/20 4:22 p.m.
Jesse Ransom (FFS) said:

What's the weight difference between aluminum and iron LSs?

I figure there are enough aluminum ones that it makes sense to lose weight that way if you care unless the price difference is really big, or the actual weight difference is small.

110 pounds

https://www.jepistons.com/blog/everything-you-wanted-to-know-about-the-gm-ls-engine-family

malibuguy
malibuguy GRM+ Memberand Reader
11/3/20 6:03 p.m.

Do people still buy prosport junk?

Ive given them a few tries.  The best one lasted 2 months

Pete. (l33t FS)
Pete. (l33t FS) GRM+ Memberand MegaDork
11/3/20 7:32 p.m.
Driven5 said:

In reply to 350z247 :

Because regardless of any other factors, engine block material is the difference between winning and losing at a track day...LOL

Having 80 pounds of nose weight that doesn't need to be there is losing no matter where you are.

Pete. (l33t FS)
Pete. (l33t FS) GRM+ Memberand MegaDork
11/3/20 7:35 p.m.
Patrick (Forum Supporter) said:
Driven5 said:

In reply to 350z247 :

Because regardless of any other factors, engine block material is the difference between winning and losing at a track day...LOL

my iron block 5.3 240z is such a pig at 2430# wink

Well....  Weren't stock Zs in the 2200lb range?  And the L24 was a stonkin' heavy engine.

 

Not saying 2430 is bad, but also, you didn't spend probably $4k for a reman engine from Summit either.

Paul_VR6 (Forum Supporter)
Paul_VR6 (Forum Supporter) Dork
11/3/20 7:43 p.m.
Pete. (l33t FS) said:

Not saying 2430 is bad, but also, you didn't spend probably $4k for a reman engine from Summit either.

Wonder if the rods being in the oil pan would be an issue for a warranty claim cool

DeadSkunk  (Warren)
DeadSkunk (Warren) PowerDork
11/3/20 10:03 p.m.

Around here (SE Michigan) you won't see aluminum blocks for the price of iron, they carry a premium and are much rarer. The majority are 5.7s with the occasional 5.3 LM4.     6.0 and 6.2 blocks are the really pricey ones and you would have to really, really want the weight savings to fork over the extra IMHO. I bought a 5.3 for $300, which I think is a real bargain, so I get the weight savings for little extra cost. It's also 100 pounds right off the nose. For a heavier car I'd go iron, but for something lighter, like a Miata, aluminum all the way.

Patrick (Forum Supporter)
Patrick (Forum Supporter) GRM+ Memberand MegaDork
11/4/20 9:37 a.m.

In reply to Pete. (l33t FS) :

according to the interwebs, my particular car (a cobbling together of many parts and i only call it a 240z because that's what the title says it is) started life at 2875#.  so i'm almost 450# lighter than stock with my iron block v8.  on the scales i had my heavy steel wheels on the back too because drag tires were on it.  

Pete. (l33t FS)
Pete. (l33t FS) GRM+ Memberand MegaDork
11/4/20 10:39 a.m.

In reply to Patrick (Forum Supporter) :

I can believe 2875 for a 280ZX.   No way in hell a 240Z made out of Reynolds Wrap and air could weigh 2875 even with two people in it.

 

Official curb weight per Nissan for a '70 was 2300.

 

(Your Z is still something like 50-75lb lighter than the black RX-7.)

350z247
350z247 New Reader
11/4/20 11:01 a.m.

In reply to Pete. (l33t FS) :

Thank you; 110 pounds on the nose of any car is never good. If you're going to spend the time and money to swap an engine for an NA build, it's gotta be aluminum. The heat management is also a big plus for aluminum blocks. Understeer and heatsoak are never fun. 

Driven5
Driven5 UltraDork
11/4/20 12:48 p.m.
Pete. (l33t FS) said:
Driven5 said:

In reply to 350z247 :

Because regardless of any other factors, engine block material is the difference between winning and losing at a track day...LOL

Having 80 pounds of nose weight that doesn't need to be there is losing no matter where you are.

Some people have the ability to be able to see the many shades of gray that exist between black and white...Others don't.

The only losing comes in thinking there is anything more to winning than having fun.

350z247
350z247 New Reader
11/4/20 12:53 p.m.

In reply to Driven5 :

You know what's not fun? Understeer, heatsoak, reduced acceleration, longer stopping distances, greater polar moment of inertia, increased wear, ect. Adding weight, especially in the wrong place, can really suck the fun out of a car.

bigdaddylee82
bigdaddylee82 UberDork
11/4/20 1:00 p.m.

Those high capacity fuel tanks are terrifying, what if some nut job in a Mustang gets their hands on one?

350z247
350z247 New Reader
11/4/20 1:12 p.m.

In reply to bigdaddylee82 :

My understanding is they can only make them for trucks due to different emissions regulations on trucks vs cars. You should be safe!

Driven5
Driven5 UltraDork
11/4/20 1:28 p.m.
350z247 said:

In reply to Driven5 :

You know what's not fun? Understeer, heatsoak, reduced acceleration, longer stopping distances, greater polar moment of inertia, increased wear, ect. Adding weight, especially in the wrong place, can really suck the fun out of a car.

I've never heard somebody who has added the nose weight of forced induction or swapped an alum/iron pushrod V8 into their Miata, RX7, E36, S30, etc talk about how it sucked the fun out of the car... Nevermind anybody who has swapped their all-iron pushrod V8, for a significantly more powerful one with aluminum heads. Believe it or not, there are plenty of well build, tuned, and balanced cars carrying such 'unnecessary' nose weight that still have all of your concerns well in check.

If 100 pounds (anywhere on the car) were really that important to having fun, it would be 'losing' from the start just to be running a production based chassis.

350z247
350z247 New Reader
11/4/20 2:39 p.m.

Yes, and every single one would be better if they simple took a bit more time and/or money and used an aluminum block. There's no extra effort and complexity. If you're going to go through the effort of doing something as involved and expensive as an engine swap, do it right the first time.

84FSP
84FSP UltraDork
11/4/20 3:30 p.m.

Wow sounds like a good place to sell the LS6 5.7 out of my V...

malibuguy
malibuguy GRM+ Memberand Reader
11/4/20 6:55 p.m.
350z247 said:

In reply to bigdaddylee82 :

My understanding is they can only make them for trucks due to different emissions regulations on trucks vs cars. You should be safe!

Its in reference to a cannonball run that was made recently 

wvumtnbkr
wvumtnbkr GRM+ Memberand PowerDork
11/4/20 7:08 p.m.

Oh boo boo.  So.ebody is making a part that I don't wanna buy....

 

Geez people this is grm.   People are doing 10 second passes with an sbc AND road racing successfully with iron blocks.

 

Knock it off.  Don't buy it if you don't want it.

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