Sterem45

I have a lq4 block that has been bored .030 and am looking for advice on how to pursue a 800 hp engine. Budget is no issue.

HCI2000SS

iTrader: (2)

Blower or turbo would do it no problem

Sterem45

I am looking to do it naturally aspirated, I have Keith Black pistons and voodoo H beam rods.

Burken01

iTrader: (88)

You are gonna need more cubes than a 408 to come close..

But even a 454 lsx with all the goodies is hard to get past 750hp

So you will have to take that into consideration

96capricemgr

iTrader: (1)

For the cost of an 800hp NA build the added cost of a bigger bore block is peanuts. Guessing this is an inexperienced pipe dream with a $6000 budget.

KCS

iTrader: (20)

It's going to take a great set of heads, a lot of compression, and a lot of RPM.

Here's a good example:

427" LS3 Engine Dyno Results

Darth_V8r

iTrader: (4)

Build a good, solid 408 to get to 600 and change, then hit it with a 200 shot.

IMO, 800 all motor is not realistic. Kind of the "magic" specific horsepower number you can achieve (with serious attention to detail) is 100 hp/liter. So you need at least an 8-L engine - 488 cubes - to have a shot at it

ahritchie

iTrader: (1)

I agree a 408 won't cut it; however 800 HP N/A has been done, and surpassed by a LOT (1029HP 440 n/a LSX) 2.3 HP per CI or 142 HP per liter:
http://www.superchevy.com/how-to/ght...-440ci-na-lsx/

Don't tell honda S2000 owners about this 100HP per liter "magic" HP limit.

DavidBoren

Oh Christ, that 100hp/liter sh*t is all those hon-duh girls have to brag about. Nevermind the fact that their 100hp/liter motors still can't outsew my grandma's viking.

But yeah, without a NASCAR level engine build, you probably aren't going to achieve 800 naturally aspirated horsepower with an lq4 408... Sorry.

Darth_V8r

iTrader: (4)

LOL! I didn't mean it as a fundamental limit, but more of a practical limit to what you can do without going way into it. How many 6.0's you see putting 600 HP to the ground all motor?

So, all I was really saying was 408 ain't gonna do it, and a 408 is 6.7 L, so figure a 408 will get you into the mid 600-range and make up the rest with Nitrous.

Yeah, 400 HP with 200 pounds of torque. They're fun to troll on the street though. I like to pace them, then flip them the bird and take off

HCI2000SS

iTrader: (2)

https://ls1tech.com/forums/dynamomet...93-octane.html

Hers your 800 hp n/a build

LPE 403

iTrader: (6)

^^ lol, that guy....

probably a few more in it with some changes.....2016

(OP....bullet could be for sale if interested....and budget wasnt an issue)

HCI2000SS

iTrader: (2)

Yours is the only 800 hp n/a f-body I can think of to be honest lol

axe murderer

iTrader: (3)

This with a 4.00" crank
https://ls1tech.com/forums/carburete...ls3-build.html

LPE 403

iTrader: (6)

ended up a 798 with the last cam....but its just a dyno #

HCI2000SS

iTrader: (2)

What's it making at the wheel now?

LPE 403

iTrader: (6)

634/542 on a heart breaker....thru full exhaust and a 9".

blk00ss

iTrader: (66)

I just read through your build and that's very impressive! But why did it only make, what was it, 630's to the tire? Just figure it would be closer to 680-700whp.

LPE 403

iTrader: (6)

Mustand dyno....again, racing dynos, but this particular dyno is typically 50ish less than many of the Dyno Jets around here. So by that math, 15% for drivetrain, M6, etc....its close to the "right" number. Obviously, I need to run it down the track when I feel its ready....soooooo, v2.0 is on the horizon

HCI2000SS

iTrader: (2)

Was this at the Car Guys dyno? If so then I totally agree that dyno reads super low. I made like 415 n/a and 530 N20 on it, and I know I have way more than that in it lol