pauldana

here is a build list my son has put together, he would like to get about 700+ hp......

what do you think?

• F.A.S.T. 102mm Intake Manifold and Throttle Body
• Comp Cams LSr Cam Lift In/Ex: .642 Duration In/Ex @.050” 247/255 #54-463-11
• Comp Cams Hyd/Roll Type ‘R’ Pro Magnum Lifters
• Comp Cams Hi-Tech Push Rods .080”x5/15”
• Comp Cams Tool Steel 7* Valve Locks and Retainers
• Comp Cams Valve Seels
• Comp Cams Push Rod Guide Plates
• Comp Cams Key Way Adjustable Billet Timing Set (Roller)
• Lunati VooDoo Aluminum Rocker Arms Roller Tip 1.7
• Lunati VooDoo Beehive Springs (.700” Max Lift)
• Manley Stainless Steel Valves (Severe Duty; 5/16” Stem)
• World Casting LS1 Warhawk Heads (Bare, CNC Ported)
• ARP ProSeries Rocker Arm Studs and Nuts (7/16”)
• Callies Compstar Forged Crank and Rods with Wiseco Pistons (Internally Balanced, 4.125” Stroke, 11-11.2 compression ratio)
• Fidanza Aluminum Flywheel
• Fel Pro Gasket Kit
• Block Bore .010” over and crank clearance machining



one last thing, the replies made in this thread will be from my son Danny, he and his brother Chris are going to be building this engine, Danny is 17 yo and Chris 16yo, Danny is working this summer at NASA as an engineer intern.
he and his brother have the knowledge drive and money to see this to completion, the boys look forward to your help and input, and I would to say thank you in advance . thx, Paul

pauldana

anyone?

72LS1Vette

You might want to try posting this over on ls1tech.com also. A lot of guys who have done a LS swap on this forum have either used stock engines or, like myself, have bought a modified engine and don't have all of the specs to make any useful comments. The HP numbers are pretty ambitious so the more research they can do the better off they will be. The LS9 is running 620 HP and that engine has the benefit of the GM engineering expertise.



Rick B.

pauldana

yea we'll put it over there soon
thanks

MrForce

you might want to consider LS3/L92 type heads. The cathedral port LS1 styles are fading in popularity compared to these LS7 based rectangular ports styles. As an added point cam selection changes with these heads due to the increased flow.

78Vette-SA

Can't use the L92 heads on an LS1 block though. They require a 4" bore block. The LS1 is a 3.96" bore block. Even if you go .010 over the valves will still hit the cylinder wall.

My first question would be what is the purpose of the motor? Is it for a driver or the track or both. For a driver and street (and tuneability) in an LS1 that's a little high on the cam side (Just an opinion, your mileage will vary).

You might want to consider, before spending all that money for the forged bottom end pieces and machining on an LS1 to buy something like an LS2/3 413 Short Block and L92 Heads and now you are right up there. However, if the goal is for the guys to do all the work themselves and you already have the block then what the hey.

As mentioned some math guru's on the LS1Tech or here can help better with the Cam specs. Wish I had these motors (instead of VW's) to play with at their age). Good luck with it.

Garys 68

I'm no expert on engine building, but some of the L92 head builds I've seen over at LS1tech have been pretty impressive. And that's an off the shelf GM piece.
But as pointed out, you need a 6.0 or 6.2 bore to run them. If cost is an issue over weight, you might want to consider an iron LY6 engine to start with. Stroke it, GM carb style intake with injectors, etc. That could produce close to 700 reliable, streetable hp.
That my plan for the next engine in my 68 corvette.
BTW, you 17yr old is interning at NASA? I guess you can take him literally when he says engine building isn't rocket science.

pauldana

i plan on staying with the ls1 block. a new block is way too much money right now and i just cant seem to justify buying it

but it will be a track car, taken on road races and runs, and still driven to work every once in a while

i havent really looked that that kind of intake, mostly just as the lsxr manifold or the ls6 manifold

Hotrod406

The lsxr is for LS3 or LS7 heads so it won't work on LS1 heads.

It's not going to be easy/possible to get 700hp out of 346 cubic inches and still have any streetability without boost.

Check out LS1tech.com and you'll be able to get a decent idea of what you'll need to do.

pauldana

they make the lsxr for the ls1. i have called them. i know this for a fact

and its not going to be a 346 ci engine either
it will be a 396

but i will be posting a completely different and revised build shortly

Hotrod406

Right on both accounts. I did not know that they changed the name on the LS1/2/6 manifolds too. I also didn't remember that you had a 4.125 crank in your build. Sorry about that.

Do some searches on that 4.125 crank though. That puts the piston a lot further down in the hole than was intended and they tend to rock and use a lot of oil. I love built LS1s so keep us informed.

I'd do a 6.0 and put LS3 heads on it. They will be cheaper than the Warhawk units. Here is a link to the heads:

http://sdparts.com/details/12629063

A 4.0 crank in a 6.0 is a 402. More inches with better piston control. Compression height will also be better.

pauldana

Here's a new revised build list for the LS1.
what do you all think about this one?

396 CID

Compstar 4.125 Crank
Compstar rods
Wiseco custom piston
GFX rings
ACL RACE coated bearings main and rods
ARP mainstuds
GM block plugs
heads: TFS 225 or 235
custom thick walled pushrods
Morel link bar hydraulic lifters
Yella Terrra Ultra Lite rockers
GM gaskets
Double roller timing set
Melling HV oil pump
custom comp cam
ARP cam bolts
ARP cam retainer plate bolts

pauldana

oh and the lsxr manifold eventually but possibly stick with the ls6 manifold

pauldana

manley valves