500whp out of a 5.3 N/A???

[Shawn1112]

Purchased a 5.3 from 70 deville over the weekend. Dont have a car to drop it in yet but have my eyes on a couple of different G Bodies. Hoping to be at or around 500whp N/A for under $3k, is that doabale or wishful thinking? This will be my 1st non Mopar build, so I have no clue about these LS motors. People have told me h/c/i should get me around 500 to the crank. I have also heard LS6 heads vs aftermarket heads is the way to go. Again, I am clueless on what works and doesnt work on these motors. Any and all help/suggestions is much appreciated as I'm looking to get started on this project asap!

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[cap42]

Possible? Yes, with your budget in mind no. It won't be easy either but it can be done.

Read this thread it's got a lot of info in it.

https://ls1tech.com/forums/advanced-engineering-tech/1883181-500whp-5-3-n-possible.html

 

[Yaj Yak]

I felt like it'd be possible to hit 500 crank hp with 3k in work to a 5.3...

 

[Gone_2022]

500 wheel with that budget? No.

You would need very high flowing heads, very large cam (fly cut pistons may be needed), better intake, though a good exhaust.

The heads you will need alone will set you back nearly your entire budget.

 

[Yaj Yak]

hmmm so title says whp, OP post says crank hp... soooo i dunno

 

[daturbosix]

that is going to be hard pressed to archive IMO.

 

[daturbosix]

https://ls1tech.com/forums/generati...7-need-help-picking-parts-500-hp-n-build.html

 

[cap42]

for the those who don't want to read through the whole thread I linked (it is 6 pages).

At minimum ported 243/799 heads but AFR 215's are ideal. Cam and spring upgrade with consideration of needing to spin it to 7500 rpm. 1 7/8 headers fast 102 intake, ls7 lifters. There is a good cam spec in that thread and it looks to be aggressive.

By all accounts the guys over on Ls1 tech say in theory the limiting factor is the small bore cylinders limiting what head/valve size you can run. 620 flywheel is what they are saying is the theoretical max limit of the 5.3 n/a

Again it can be done, but to hit that 500rwhp mark your looking at aftermarket heads and intake which will cost you at least 2k right there.

 

[Yaj Yak]

for the those who don't want to read through the whole thread I linked (it is 6 pages).

At minimum ported 243/799 heads but AFR 215's are ideal. Cam and spring upgrade with consideration of needing to spin it to 7500 rpm. 1 7/8 headers fast 102 intake, ls7 lifters. There is a good cam spec in that thread and it looks to be aggressive.

By all accounts the guys over on Ls1 tech say in theory the limiting factor is the small bore cylinders limiting what head/valve size you can run. 620 flywheel is what they are saying is the theoretical max limit of the 5.3 n/a

Again it can be done, but to hit that 500rwhp mark your looking at aftermarket heads and intake which will cost you at least 2k right there.

i was confused because the post says crank hp, and the title says whp.

if it's whp, i agree with you, but 500 crank i think is doable for 3k in budget. he already has the engine.

 

[Shawn1112]

i was confused because the post says crank hp, and the title says whp.

if it's whp, i agree with you, but 500 crank i think is doable for 3k in budget. he already has the engine.

Sorry for the confusion. Yes I want to be at around 500whp, what I was saying is that I was told H/C/I would put me at 500 to the crank. Not my goal with the build its just what I was told. So I just read all 6 pages on the link that Cap posted. I guess I need to lower my expectations, increase my budget or go turbo lol.

 

[cap42]

i was confused because the post says crank hp, and the title says whp.

if it's whp, i agree with you, but 500 crank i think is doable for 3k in budget. he already has the engine.

ya 500 crank should be doable depending on machine work for that budget.

LS6 intake
used 243's and have them worked over a bit.
Cam and spring upgrade lS7 lifters
Headers

That should get there

 

[cap42]

Sorry for the confusion. Yes I want to be at around 500whp, what I was saying is that I was told H/C/I would put me at 500 to the crank. Not my goal with the build its just what I was told. So I just read all 6 pages on the link that Cap posted. I guess I need to lower my expectations, increase my budget or go turbo lol.

 

[Chester Copperpot]

go turbo lol.

yes

 

[EmersonHart13]

Turbo all day, you will easily achieve that and so much more

 

[Shawn1112]

yes

Not sure if the budget is there to go turbo.
Just for shits and giggles what would a ballpark cost be to go turbo.
Would probably have to be 100% done at a shop as I dont have the resources to get that done in my garage.

 

[Yaj Yak]

the part people forget about i feel like with "hey just go turbo" on LS engine's is how much the fuel system winds up being when done well

and then the trans to support it

and then the rear end to handle it

etc etc

 

[Gav'sPurpleZ]

[MENTION=148]HILROD[/MENTION]

 

[Chester Copperpot]

Not sure if the budget is there to go turbo.
Just for shits and giggles what would a ballpark cost be to go turbo.
Would probably have to be 100% done at a shop as I dont have the resources to get that done in my garage.

Wish I could tell you.

Food for thought, my Corvette had the TFS heads/cam package with 255 heads and made 490 to the wheels (or depending on which dyno you'd like to use, 450 or 550 ). But that's a 6.2 with a $3200 head/cam package and $1200 American Racing headers.

 

[10sec]

Sloppy mechanics did a 500whp turbo build with all the secrets to saving $$ just for you. Watch all episodes.

 

[daturbosix]

Sloppy mechanics did a 500whp build with all the secrets to saving $$ just for you. Watch all episodes.

not N/A though.

 

[10sec]

Yeah, he's considering a turbo build, look above.

 

[daturbosix]

the part people forget about i feel like with "hey just go turbo" on LS engine's is how much the fuel system winds up being when done well walbro 450

and then the trans to support it stock 4l80e with HD2 shift kit

and then the rear end to handle it depends on vehicle being used

etc etc

.

 

[Yaj Yak]

:clap:

 

[DEEZUZ]

Yes possible.

Cause I'd like to think l'm near that power with an entire engine I bought for less than the money your looking to out in one.

Rod bolts for sure though.

 

[daturbosix]

Yeah, he's considering a turbo build, look above.

oh. (cracks knuckles)

well then.......

stock 5.3
arp head bolts
fresh head gaskets
valve springs
trunion upgraded rockers
turbo cam
ported ls6 pump

stock 4l80e with HD2 shift kit
converter of your choice

walbro 450 pump
-8an feed line
-6 an return line
-boost reference regulator
-uncapped truck injectors

VS racing s475 clone
ebay 60-ish mm waste gate
ebay 50-ish mm BOV
ebay a2a intercooler

.DONE.