11 Bravo

iTrader: (3)

Exactly why wouldn't it be pleasant? You need to go for a ride in a street car with 400+ cubes. Mine is 100% daily drivable. Having said that, the original poster did not say he wanted a daily driver. He wants 500hp.

KHShapiro

iTrader: (10)

i forgot to add , i wasnt questioning your qualifications, i am just trying to clear it up for some of the others that may read this and get confused.
Still have the GTO?

11 Bravo how much tq differance do you think the N/A will have vs the FI?

11 Bravo

iTrader: (3)

Not much if any at 500hp levels. Most boosted LS1's I see here that make @ 500rwhp are in the mid to upper 400's in torque. About the same as a 402.

KHShapiro

iTrader: (10)

11 Bravo : usually these is an Avg of 20+ rwtq differance between na/FI and as the FI gets higher there differance becomes greater compared to that of the N/A including a S/C
a 500 rwhp turbo car is gonna be close the same tq as hp and in alot fo cases they produce more tq than HP
here are 20 pages of N/A dyno numbers , granted there are a few odd ball numbers in there AND some of the numbers listed at boosted as in FI numbers
https://ls1tech.com/forums/showthrea...8&page=1&pp=20
Let me make something clear when I tallk about FI i am talking about Turbos (if anyone hasnt already figured that out) unless stated otherwise

the boosted list
https://netfiles.uiuc.edu/nbrinkw2/B...boosted_06.htm

landstuhltaylor

iTrader: (6)

+1 for n/a 402 set up for boost in the future

KHShapiro

iTrader: (10)

i was talking about these 10 and 9 second n/a rides
while yours not doubt is 100% user friendly are you in the 9's n/a?

QSPres

iTrader: (15)

No, I sold it to a guy in England. I'm thinking about doing another one now though....

BlackHawk T/A

iTrader: (3)

I think you guys are going to be susprised at what the NA game will bring in the next year or two.

BIG cubes make a car very driveable. Forget about poor street manners. I'm thinking:

LS2 402 or larger
CNC L92 Heads
Ported L76 Intake
Custom Cam
SCR 13:1-14:1
DCR 9:0 or more
E85

600-700rwhp anyone? And it can be very driveable. I bet you could hit 600rwhp with a "small" 238/242 LSK lobed cam, and have gobs of usable power all over. A 427-455 cube motor could probably crack 700-750rwhp with an individual runner intake. All speculation of course but we will see how far off it is pretty soon.

Basically what I am trying to say is NA can be a very formidable setup if done right, and it will be cheaper than forced induction. Although if you want to max out both setups, of course the boost will take you further.

jermzz

iTrader: (18)

550 rw can get you into the 10's completely streetable NA with minor weight reduction. Not uncommon at ALL with a lsx stroker N/A.

KHShapiro

iTrader: (10)

jermzz ,not to try and get into a sword fight here but you seem to have a decent set-up from your Sig, what are you running, any dyno numbers that show the curve?

1slow98Z28

iTrader: (3)

Theres no replacement for displacement!! build a 402 and make it nasty

30th t/a

iTrader: (51)

your right on here with this. i couldnt agree more.

i never drove a big cammed 402 but ive had a 346 with heads & a g5x3 which is a big cam for a 346 and it drove totally fine, totally streetable. I dont understand where everyone thinks NA is so unstreetable. maybe if your talk 14.1 comprresion with gigantic solid roller, then yea ok.
I also had a twin turbo with a stock cam & heads and it drove like a stock LS1.

if your looking for smooth 600 plus HP go FI but if 520-550rwhp is all you want Id go 402. watch the videos of a NA 500rwhp C6 z06 pull a FI 600rwhp KB cobra. Ive seen this twice so far and they were different cars & drivers.

jermzz

iTrader: (18)

I'm still breaking in this motor on a base tune. Before the rebuild, it was a 422, and with mutiple spun bearings and imporper lifter preload it did around 530 / 490. Thats through a 12 bolt with 4.11's. Added a little more port work and a few cubes. Not sure what it will do now, but it feels strong...really strong.

I dont have the graph from before on hand, but it was making 420 ft/lb at about ~2300 rpm. IT's getting a full tune in a couple weeks and i'll post the graph for you.

jermzz

iTrader: (18)

Yeah, that's right. I saw a 630hp 03 cobra get beat by a 01ss with a 422ci ls6 making 520rwhp. 50 to 150 race I think it was. it's on video around here somewhere. Srokers are no joke and very streetable if set up and tuned correctly. You can run pump gas up to about 11.6:1 or so, as long as you stay in that range, youll make good power, have streetability and get decent gas mileage!

speedyss

Tell me about it, its F*cking awsome!!! Mods in sig.

Quick Carl

Already been done. It's not a problem for big cube NA power over 700 HP, 650 Tq., pump gas, mild idle, TONS and TONS of torque without having to spool up a blower or turbo. Add 93 octane and go.
https://ls1tech.com/forums/showthrea...7&page=1&pp=20
https://ls1tech.com/forums/archive/i.../t-534661.html

zo6vetteman2003

iTrader: (1)

There was an article in CHP recently where a forged mild streetable cam 402ci made 580hp and cost just under $10K U.S. to build. A procharged, forged LS1 will make serious power depending on how much boost, for about the same money doing it yourself and rebuilding your LS1 motor. You'll need to find a new set of heads though, but not totally necessary. To keep the cost down, I would look for an LQ9 head because of the 72cc combustion chambers. These can be found on the 6.0L Cadillac Escalade and they are aluminum and can be ported easily.

jermzz

iTrader: (18)

That 703 was on a motor dyno also, don't forget. I'd do the math but I don't know what the drivetrain on the car theyre putting it in will be. Considering a 15% drivetrain loss, it would be somewhere around 600rw. only about 50 horse over what a decent smaller stroker would do at the wheels, and thats probably due to those ls7 heads. I bet the torque is off the charts though, i'd like to see a dyno sheet of the motor in a car on a chasis dyno.