Ls1 500 Bhp ????

slow 427 · #1 (**permalink**) 02-04-2007, 03:00 PM

Ok guys Im getting very close to having "BETTY" (its got a name now) finished.
And as most of us do I'm getting ready to go shopping for HORSEPOWER !!!!
Now being stupid, i want to squeeze 500 reliable horsies out of her.
Has anyone done this , and if so how ???
I still want to run injection and i dont want to turbo it or blow it.
Any help would be greatly appreciated.
Thanks

sambo · #2 (**permalink**) 02-04-2007, 03:18 PM

I assume you've already upgraded the stopping power in readiness for all these ponies?

Aussie Mike · #3 (**permalink**) 02-04-2007, 03:47 PM

500HP is very easy to achieve. A set of ported heads, Valve springs and a cam is pretty much all you need.

A few other things to add to the list to improve reliablility:

Good Quality Rod Bolts, these are a bit of a weak link in engines turning really big revs. The Rods are very strong and there are plenty of blown and turbo combinations making 600HP on stock rods.

Ported LS6 oil pump. Early motors ie 97-00 had some oil pump failures so it's a good idea to replace it with a later pump. Porting it improves flow and they usually have the pressure relief shimmed to up the pressure a bit.

I've got a new cam, dual springs, titanium retainers, molly push rods, LS6 Pump coming from the US. Guys in the US using this cam regularly get more than 400 RWHP and with ported heads are getting up around 440RWHP. That equates to well over 500HP at the crank.

Cheers

slow 427 · #4 (**permalink**) 02-04-2007, 03:55 PM

Quote:

Originally Posted by Aussie Mike

500HP is very easy to achieve. A set of ported heads, Valve springs and a cam is pretty much all you need.

A few other things to add to the list to improve reliablility:

Good Quality Rod Bolts, these are a bit of a weak link in engines turning really big revs. The Rods are very strong and there are plenty of blown and turbo combinations making 600HP on stock rods.

Ported LS6 oil pump. Early motors ie 97-00 had some oil pump failures so it's a good idea to replace it with a later pump. Porting it improves flow and they usually have the pressure relief shimmed to up the pressure a bit.

I've got a new cam, dual springs, titanium retainers, molly push rods, LS6 Pump coming from the US. Guys in the US using this cam regularly get more than 400 RWHP and with ported heads are getting up around 440RWHP. That equates to well over 500HP at the crank.

Cheers

Nice thanks Mike looks like im going to be spending a little more on her now

Beejay · #5 (**permalink**) 02-04-2007, 06:08 PM

Paul,

Since your car is pretty authentic looking, I would look at quad throttle bodies. Add a cam and Higgins heads and have 500 Hp easy.

There are several companies in Sydney that specialise in LS1 engines. The best known are possibly Sam's Performance, Marrano's and Hocking Race Shop.

How is the new paintjob???

Ben

wojan · #6 (**permalink**) 02-04-2007, 06:59 PM

I would look at getting a 427 Stroker kit for it. Then you could put the 427 badges on there and be legit

slow 427 · #7 (**permalink**) 02-04-2007, 08:29 PM

Quote:

Originally Posted by Beejay

Paul,

Since your car is pretty authentic looking, I would look at quad throttle bodies. Add a cam and Higgins heads and have 500 Hp easy.

There are several companies in Sydney that specialise in LS1 engines. The best known are possibly Sam's Performance, Marrano's and Hocking Race Shop.

How is the new paintjob???

Ben

Paint job is done sideshow bob is coming on Staurday to finish off the electricals.
I was going to get a throttle body that fits on top of the manifold ( like Mike)
with the turkey pan etc.

slow 427 · #8 (**permalink**) 02-04-2007, 08:34 PM

Quote:

Originally Posted by wojan

I would look at getting a 427 Stroker kit for it. Then you could put the 427 badges on there and be legit

Yes VERY tempting !!!!!!!!!

slow 427 · #9 (**permalink**) 02-04-2007, 08:40 PM

Quote:

Originally Posted by Aussie Mike

500HP is very easy to achieve. A set of ported heads, Valve springs and a cam is pretty much all you need.

A few other things to add to the list to improve reliablility:

Good Quality Rod Bolts, these are a bit of a weak link in engines turning really big revs. The Rods are very strong and there are plenty of blown and turbo combinations making 600HP on stock rods.

Ported LS6 oil pump. Early motors ie 97-00 had some oil pump failures so it's a good idea to replace it with a later pump. Porting it improves flow and they usually have the pressure relief shimmed to up the pressure a bit.

I've got a new cam, dual springs, titanium retainers, molly push rods, LS6 Pump coming from the US. Guys in the US using this cam regularly get more than 400 RWHP and with ported heads are getting up around 440RWHP. That equates to well over 500HP at the crank.

So Mike can you tell me who you got your parts from and what they were exactly , did you also get a top mounting throttle body ?
Also which direction does your water pump run??
Thanks Paul

Cheers

So Mike can you tell me who you got your gofast bits from and exactly what they were ?
Did you get a top mounting throttle body as well.
Also whick direction does your water pump turn ?
Thanks Paul

Plums · #10 (**permalink**) 02-05-2007, 02:44 AM

As Mike says, cam only or head and cam will do it, though your exhaust must be good.

These motors are pretty tough, personally I wouldn't worry about pulling it apart. Mikes advice on the oil pump for LS1's (not the later LS6) sounds like good advice.
If I was going to pull it down I wouldn't put the stock crank back in, after all, there's no substitute for cubic inches.
I will be running mine unopened for a fair while, but when it does get opened it will be angry, real angry...

My Ute makes around 340 rwhp, which equates to roughly 430 flywheel hp. That is unopened, with the standard intake manifold, running big serpentine belts for power steering, a/c etc.

Realistically, you'll only need to make around 400 rwhp (300 rwkw) to achieve your goal of 500 flywheel hp.

Disclaimer: Converting rear wheel power to flywheel power is not an exact science, I really only care about power at the wheels or ET's at the strip!!!

Cobra.au · #11 (**permalink**) 02-05-2007, 02:50 AM

why no boost?

Aussie Mike · #12 (**permalink**) 02-05-2007, 04:53 AM

My water pump turns the same direction as the crank. Regular LSX series motors run reverse to the crank as they are driven off the back of the belt. I machined a new impeller for mine so I could run the pump in the other direction. Makes for a much neater belt setup.

I'll send you the details of my cam and other bits. I am still planning to run a Victor Jr 4 barrel manifold and throttle body. I'll probably bring one in from the US in the next few months.

Cheers

Philm · #13 (**permalink**) 02-05-2007, 12:13 PM

Slow427, do it right and put a ford in it.

Phil

slow 427 · #14 (**permalink**) 02-05-2007, 06:05 PM

Quote:

Originally Posted by Cobra.au

why no boost?

Been there done that I have a blown 400 cleveland in a f 100 still for sale !!!

slow 427 · #15 (**permalink**) 02-05-2007, 06:08 PM

Quote:

Originally Posted by Aussie Mike

My water pump turns the same direction as the crank. Regular LSX series motors run reverse to the crank as they are driven off the back of the belt. I machined a new impeller for mine so I could run the pump in the other direction. Makes for a much neater belt setup.

I'll send you the details of my cam and other bits. I am still planning to run a Victor Jr 4 barrel manifold and throttle body. I'll probably bring one in from the US in the next few months.

Cheers

Thanks Mike are the impellers hard to make ??

slow 427 · #16 (**permalink**) 02-05-2007, 06:10 PM

Yeah, I have no come back for that .
If I could I would, and it would be a nasty 427 that would

put me into a wall at great speed.

Aussie Mike · #17 (**permalink**) 02-05-2007, 07:29 PM

Quote:

Originally Posted by slow 427

Thanks Mike are the impellers hard to make ??

There was a bit of work in it but not that difficult. I spent a fair bit of time on the milling machine doing the blades and getting the clearances right.

There's a few pics of it in my gallery:

Cheers

Aussie Mike · #18 (**permalink**) 02-07-2007, 04:13 PM

Here's all the details on the combination I just bought: GM High Tech Performance LS1 Build

They test the TSP MS4 cam that I just bought. Just a change of cam and valve springs and push rods produced 482HP on the engine dyno. Adding a set of CNC ported LS6 heads jumped that figure to 529HP. Bolting on a F.A.S.T manifold and larger Throttle body bumped the figure up to 544HP.

Some other tests I've seen show the 4BBL manifold producing even more power than the F.A.S.T manifold.

Pretty impressive from a stock cube, stock bottom end 346 cube LS1 motor.

Cheers

Rob. Smith · #19 (**permalink**) 02-08-2007, 02:31 AM

Quote:

Originally Posted by sambo

I assume you've already upgraded the stopping power in readiness for all these ponies?

Wise advise !

HSVREDSLED · #20 (**permalink**) 02-08-2007, 03:00 AM

Quote:

Originally Posted by Beejay

Paul,

Since your car is pretty authentic looking, I would look at quad throttle bodies. Add a cam and Higgins heads and have 500 Hp easy.

There are several companies in Sydney that specialise in LS1 engines. The best known are possibly Sam's Performance, Marrano's and Hocking Race Shop.

How is the new paintjob???

Ben

Give Sonny at Marranos a call. One of the most helpful people in the business.