FI LSX block machining costs?
i used an aftermarket bbc block with darton sleeves and an aftermarket bbc iron block.the aftermarket alum block was made out of a much higher quality material than the stock ls2 block.the darton sleeve def help ridgidity and bore distortion but dont eliminate it.You have to remember that the alum expands at a much greater rate than alum and is much more flexible.doesnt matter how great the sleeve is if whats holding everything together is flexing and distorting.
It's not really up for debate...Lsx will always be stronger than a re sleeved aluiminuim. your only as strong as your weekest point. i.e. the aluiminuim that the earl sleeves are sitting in. I think that the earl is a great block from the looks of it..I know steve and the ohio boys give them hell and seem to have great results.I think they both have there place.There is no question that the LSX is more durable though.
Depends on how much you want it bored. For our 434 its $1150 for block and specific LSX work, $1250 for a 454.
Our LSX FI 434 is $6410 and will handle all you can throw at it. (with proper tuning of course
)
Our LSX FI 434 is $6410 and will handle all you can throw at it. (with proper tuning of course
) Last edited by 99blancoSS; Aug 17, 2008 at 03:05 AM.
Thread Starter
Joined: Nov 2001
Posts: 45,361
Likes: 1,792
From: Chicago, IL
My ls2 block weighed in at 87 lbs. I've seen the LQ4 blocks are usually right at 180 lbs. If the LSX is 225, that's an easy 140 lbs or so...how much is that worth to you? I think it's definitely worth it, but I'm so greedy with weight I wouldn't know where to begin.
On The Tree
Joined: Jan 2008
Posts: 121
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From: Huntertown, IN
i used an aftermarket bbc block with darton sleeves and an aftermarket bbc iron block.the aftermarket alum block was made out of a much higher quality material than the stock ls2 block.the darton sleeve def help ridgidity and bore distortion but dont eliminate it.You have to remember that the alum expands at a much greater rate than alum and is much more flexible.doesnt matter how great the sleeve is if whats holding everything together is flexing and distorting.
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I think the bore would stay much truer but the bores would still shift a few thousandths in the block itself. This is pretty much a known fact when dealing with aluminum motors.
Whats does this do to a bearing, when the housing around it is expanding quicker than the bearing itself? (rhetorical)
no problem,like i said before i just want people to have all the info so they can make an informed judgement on want they need for their application.I'm def not saying one block is better than another-they both have their place in different applications-it's just matters what you're willing to compromise
On The Tree
Joined: Jan 2008
Posts: 121
Likes: 0
From: Huntertown, IN
no problem,like i said before i just want people to have all the info so they can make an informed judgement on want they need for their application.I'm def not saying one block is better than another-they both have their place in different applications-it's just matters what you're willing to compromise
we have done back to back tests on iron vs alum bbc blocks,on identical 540cid bbc in the 800hp range the alum block was down 30hp and the blowby was greater.seeing how the ls block is lighter and significantly weaker than the big block+adding 20-30 lbs of boost i would think that there would be 100+ hp difference between the 2 at 1500+hp.This could be a major factor in a class that was limited by cid restrictions or turbo size restrictions.those same classes usually have to run pretty heavy so it may not be and advantage to have a lighter block.I'm not saying not to run an alum block-just trying to give all the info so somebody can make a completely informed decision for themselves-not only that,i have an alum block in my own car.
thanks
absolutely,i can't say exactly how much,but the iron def hold the heat better
Thread Starter
Joined: Nov 2001
Posts: 45,361
Likes: 1,792
From: Chicago, IL
ERL LS2/LS6/LS1 with billet main caps and 4.000 bore: 130 lbs
So looks like 77 lbs is the difference based on Onfire's numbers.
It's not really up for debate...Lsx will always be stronger than a re sleeved aluiminuim. your only as strong as your weekest point. i.e. the aluiminuim that the earl sleeves are sitting in. I think that the earl is a great block from the looks of it..I know steve and the ohio boys give them hell and seem to have great results.I think they both have there place.There is no question that the LSX is more durable though.
ok just my 2 cents but save the weight!!! cause 25.5 cage to 7.50@3600lbs and to go faster you need to be 3200lbs or less!!!!!! 25.2. ect.. I.E. all the racing going to 1/8 mile... kinda sucks but the lsx will be stronger so there are pros and cons both ways.. in my case i need to add weight to the front so i am going with the lsx block.