lq9 or ls2
11-11-2011, 08:12 PM
#21
At that horsepower level, saying that aluminum will be less reliable than cast iron is not true. The debate between aluminum and iron is really only a weight issue until you are making 1000+ hp.
If you are willing to spend a little more money, the LS2 is the way to go IMO. 60-80 lbs at the front of the car is a big deal.
If you are willing to spend a little more money, the LS2 is the way to go IMO. 60-80 lbs at the front of the car is a big deal.
11-11-2011, 08:53 PM
#22
TECH Enthusiast
iTrader: (6)
Join Date: Sep 2007
Location: Tucson, AZ
Posts: 585
Likes: 0
Received 0 Likes
on
0 Posts
It is a weight issue and a cost issue. As far as the 80 pounds being a big deal. I would say that depends on what he is doing with the car. For handling I would say it is a very big deal. For drag racing it is nice, but there are cheaper ways to get 12 horsepower. Which is what it would take to make up for the 80 pounds.
Another thing is the op said he is wanting a 408. You dont see many LS2 block 408's because of the water jackets being thinner and the aluminum block so it will overheat easier and not be as stong as a 408 iron block. Most of the time the 408's are iron blocks and the 402's are aluminum.
11-11-2011, 09:50 PM
#23
your not ganna see a big difference in a 408 and 402 as far as horsepower is concerned anyways.
i would definetly go with the lighter weight 80 pounds is alot of weight its basicly like having 2 bags of concrete mix strapped to the front of your hood. and 80 pounds on the front will affect handling as well as weight transfer.
i would definetly go with the lighter weight 80 pounds is alot of weight its basicly like having 2 bags of concrete mix strapped to the front of your hood. and 80 pounds on the front will affect handling as well as weight transfer.
11-13-2011, 04:27 AM
#29
I made an assumption that with a question as such the op probably wasn't looking for 1000+rwhp.. And I wouldn't sweat a drop with an aluminum block at 1000rwhp.
408 and 402 would make within 5rwho of one another... If not closer.
Dont go with an lq9 for the heads.. They run a whopping 200$ or so on the boards all day.
408 and 402 would make within 5rwho of one another... If not closer.
Dont go with an lq9 for the heads.. They run a whopping 200$ or so on the boards all day.
11-13-2011, 11:28 AM
#30
Launching!
Join Date: Oct 2010
Location: covington ga
Posts: 286
Likes: 0
Received 0 Likes
on
0 Posts
90% of us on here dont "race" enough to worry abt the added weight. Its like going to kroger and looking at mayfield milk for $5 and kroger for half that... unless you are big in racing save some $ and get the lq9.. thats basically what it boils down to.
Its all in what you want the car to do. If your goal is to goal is to road/drag race then get the lighter block. If you want a cool car, whip a few mustangs and show it off then get the other. you cant go wrong with either thats all im getting at.
Its all in what you want the car to do. If your goal is to goal is to road/drag race then get the lighter block. If you want a cool car, whip a few mustangs and show it off then get the other. you cant go wrong with either thats all im getting at.
Last edited by jsmith564; 11-13-2011 at 11:38 AM.
11-13-2011, 04:29 PM
#31
Lol thats funny logic.. You aren't into racing enough to save 80#s for 500$ or so... But you are into enough to build a forced induction 408 with 750+rwhp. Kind of the same thing..?
You can build a 5.3 stock bottom on motor to whip a few mustangs, cruise around, etc.. Why would you need a 408 for that?
You can build a 5.3 stock bottom on motor to whip a few mustangs, cruise around, etc.. Why would you need a 408 for that?
11-13-2011, 07:18 PM
#33
Similar miles an l76 will run roughly 450-650$ more than an lq9. Upside? It comes with a 500$ set of heads instead of a 200$ set. Not to mention the weight saving. The intake is also worth about 150$ more. So sell all that stuff to get down to a short block on both so you can add whatever heads and intake and you are looking at 50-200$ max between an iron and aluminum block.... Or so.
L76 is where its at... Aluminum block, add a 300$ ls3 intake and a cam and make 450+rwhp with an auto and 475+ with a manual. Can't beat it for the price..
Only downside.. You have to buy the 24x adapter and ls2 conversion kit... So add 350-450$ back on, still worth it imo.
11-13-2011, 07:52 PM
#34
TECH Apprentice
iTrader: (12)
Join Date: Feb 2008
Location: newark, ohio
Posts: 374
Likes: 0
Received 0 Likes
on
0 Posts
well, what im thinking is this. OP says he wants 700ish hp for now, but later plans on FI. the two setups will most likely be very differnt. so, is the issue money, which alot of you have been talking about, or is it best setup for reliability? alot of factors play a huge part in trying to decide which route to take. in my case i went with a lq block for reliability. im sure i can make up the difference in weight somewhere else. i think realistically OP just needs to figure out what he wants to do with this car, drag or street, then tell everyone and ask for suggestions. again, just my .02
11-14-2011, 06:44 AM
#36
I re-read all of the open poster's posts. I don't see anywhere were he told you enough about his planned combination for you to come to this conclusion. You also did not specify 700 crank or 700 RWHP. One can definitely make 700 crank HP with a 408.