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I don't see how 1500 ft lbs at low RPM makes it a better street car. Even with big tires, that much torque isn't usable on the street. Cars stay hooked better on the street with less torque and more power.
Gtfoxy, you might want to graciously bow out of this one... LASTLS1 don't have to prove anything... Just watch a video of his car. It speaks for itself, sounds like your a bench racer with not so much experience in the LS world?
Maybe you missed me mentionioning it but I saw a set of LS heads back in 94. I got to flow them & play with them for a time. My FNL has an 01 vette that I have tinkered with. I put a 5.3 LS with a 68mm turbo in a 99 Blazer just for ***** & giggles. Ive tuned a few turbo 5.3's & I am in the middle of building a turbo system for my GTO.
As far as being a screen jocky, you guessed it...
My screen name came from a guy I met at the track over a decade ago while we were running our 10sec mustangs together. Mine a turbo SB his a BBF...
Hell I drag raced at Sebring Int back in high school, 92/93 ish...
I'm still brainstorming on a few things so I wanted to get some input from people that know more about it.
I want more Cubes than your normal 408, 416 etc. but I don't know how well the cylinder walls would hold up to alot of boost on say a 440 or 454.
So with that, What block are some of you guys running, how many cubes and how much power does your car put out? An ET would be good to
I can say for me i went to a LS3 in my 72 cause of drivability and ability to drive by a gas station, my Merlin 565 is badass, yet won't pass any gas station cause its always using max Cubes and has tons of torque on hand, as does a boosted LS, yet the smaller motor you boost with a turbo or blower,, the more efficient it will be when cruising, then act like a Monster when asked to do so, best of both worlds cause you can only plant so much RWHP or TQ on the street and plenty of LS cars make more power than you can use just off idle,,, you choice and when building and using the 376 cubes then you have lots of rebuilds left in her and more metal between cylinders for heat dissipation and fun when boosted it won't tax your cooling as much with thicker cylinder walls... Now a Boosted BBC will Always eat fuel fast and crazy fast when leaning on the Go pedal.... the LS can cruise like a grocery getter and get great fuel mileage a BBC will NEVER get and i'd guess a boosted LS will win EVERY street lite race cause of traction.... smoking tires isn't fast!
There's nothing wrong with small blocks if you don't mind revving them to make power.
Mileage on the 8.1Ls isn't too bad, our 540cid shop suburban gets 16mpg at 65mph with a 4L80E and 3.73s. With the 6.0L, long tubes and a 224R cam it was at 17mpg.
I'd trade a loss of 1mpg for a minor bump in power:
Granted, we still haven't done any crazy turbo setups with an 8.1L, (we're working on a 2.9L blower kit for summer) so it would be a lot of fun to see someone actually throw the big cam and a lot of boost at a 540 kit...
Wow. Didn't expect you to pop in. Pleasant surprise.
I was close to dropping in an 8.1l turbo/Allison in my shops 06 F650 when the ISB Cummins lunched a valve seat, couldn't convince the FNL to do it this time... I tried. It's still at the shop & we are putting in a 05 Cummins from a Dodge 3500 but if this motor craps out I will definitely go 540 turbo & will look you up. For what we are spending on this swap we could have easily built the gasser like I wanted.
I'm thinking BW S510 running 7-15psi if I could find a solution for the air compressor for the air brakes. I'd love to have a mild cammed 540 making 1,000lb/ft & 1,000hp in my tow rig.
[QUOTE=gtfoxy;19174997]Wow. Didn't expect you to pop in. Pleasant surprise.
I was close to dropping in an 8.1l turbo/Allison in my shops 06 F650 when the ISB Cummins lunched a valve seat, couldn't convince the FNL to do it this time... I tried. It's still at the shop & we are putting in a 05 Cummins from a Dodge 3500 but if this motor craps out I will definitely go 540 turbo & will look you up. For what we are spending on this swap we could have easily built the gasser like I wanted.
I'm thinking BW S510 running 7-15psi if I could find a solution for the air compressor for the air brakes. I'd love to have a mild cammed 540 making 1,000lb/ft & 1,000hp in my tow rig.[/QUOTE
You can do that on most new diesels now a days . Mine pulls my 48' trailer no problem..
I know but I hate diesels... Despise them really. They are steaming piles of cow flop. We have had so many issues with this hunk of crap engine I almost set the truck on fire more times than I can count. We spent $30k two years ago on that pile just to keep it running.
Had a guy that worked for me a couple years ago that had a 98 12V that was running a twin set-up making 800hp at the wheels but it took 90psi to do it. Everything for them is outrageous expensive, lift pumps, high pressure pumps, injectors, etc. HPT just released support for the 03-07 24V so I can at least tune it & do data logging now rather than having the crappy ISB Cummings "dealer only" POS ECU.... & I would have loved to dump the 7spd Spicer for an Allison.
Not changing my mind & I'm probably not changing yours. Let's leave it at that.
It all depends if you want to run a high-RPM "Small-block" or a low RPM big block.
Torque advantage over a broader RPM range & more HP will always win out when you have the room under the hood. His Chevelle has the room.
Set up a stout BB to make max boost at 3,000RPM & 1200lb/ft @ 15psi will humble you quick.
LastLS1, do you make that at 15psi? I'd like to see the dyno sheet.
I still say BB if OP wants what he wants. He asked, I answered.
Live with it.
really? You're going to tell a guy that's been deep deep 4'S in the 1/8 he doesn't know what he's talking about? Do you have any clue how much of an accomplishment that is with a small block at legal class weight?
Yeah I think I'm qualified to add my 2 cents, I drove mine 60 miles to the track on 275 pro's ran 5.11 and drove home in my 3650# street car.
On Bullet he was told to build a big block or write a huge check to get there with an LS. I wouldn't go 1500hp+ again with an LS build.
really? You're going to tell a guy that's been deep deep 4'S in the 1/8 he doesn't know what he's talking about? Do you have any clue how much of an accomplishment that is with a small block at legal class weight?
Yeah I think I'm qualified to add my 2 cents, I drove mine 60 miles to the track on 275 pro's ran 5.11 and drove home in my 3650# street car.
On Bullet he was told to build a big block or write a huge check to get there with an LS. I wouldn't go 1500hp+ again with an LS build.
Nice attempt at putting words in my mouth, but fail....
I already said it's great what he is doing, but I have seen a mentor of mine run low 8's on a stroked 4.1L v-6 Buick.
Drag racing is an old game & I've been around it a long time. So little impresses me any more.
I'm over this convo since everyone wants to jump to the conclusion I haven't been around the block more than once... I don't have anything to prove, nor do I need to. I don't need to build a blah blah blah car in order to know what I know or have seen what I have seen & experienced what I've experienced.
Well this escalated quickly haha...
I haven't checked on this thread for a minute but my plans have changed... a little
I'll be going with an LS Platform, most likely the Dart LS Next Block (4.100x3.75) to get my 396ci, twin turbos, Powerglide, Moser M9 and a big tire... maybe a 33x16x15.
I'm also hoping to get the car under 3000lbs. So if I can hit 6.99 that'd be great!! Not sure how realistic that ET would be for me but I'd love to get there.
This is what I pretty much figured out after some reading. Can you do it with an LS? Of course, but at the end of the day it's going to cost a whole lot more to do vs a BBC. And every part will pretty much be a custom one-off piece.
Well this escalated quickly haha...
I haven't checked on this thread for a minute but my plans have changed... a little
I'll be going with an LS Platform, most likely the Dart LS Next Block (4.100x3.75) to get my 396ci, twin turbos, Powerglide, Moser M9 and a big tire... maybe a 33x16x15.
I'm also hoping to get the car under 3000lbs. So if I can hit 6.99 that'd be great!! Not sure how realistic that ET would be for me but I'd love to get there.
03-02-2016, 11:21 AM
