Hey guy's. Well I'm starting a new project. I'm going to build a 1200hp LSX monster for a 62 Chevy II project. I'm thinking on buying a LSX454 crate motor and then putting in a set of 8.5/1 FE pistons.

Here is my question. I'm wondering if this will stand up to the boost I'm thinking about putting to it. I want to use a 88mm turbonetics, or preferably a twin set up.

What do you guy's think of this set up. Will it work?

Thanks guy's

 

the 88mm will get you there to that easy..probley around 18#s of boost on it..your cubes is to much even with the biggest a/r you would choke the motor up top..i would do a 408 with the 88mm version of the s400..its rated for 1500hp vs a reg gt4788 at 1400hp..either cost 1699$ new..

use a jgs waste gate 60mm and then a tial 60mm,red procharger or jgs bov...wire them up with the ams 1000 controler and your good.

 

not going to be easy making 1200rwhp with that big of a motor and only an 88. better off with a 91 or 94

 

Call jose at forced inductions. He will point you in the right direction. The 88 aint gonna get it done. You need a larger t6. Good luck. Sounds like its gonna be nasty.

 

it just says 1200 hp, not rwhp. if 1200 fwhp like already said just a 408 ci with an 88 or so would get him there. if set on an lsx block maybe a 427 with a 91 or 94 would easily be well north of 1200 fwhp.

 

no-it won't for any period of time.The bore is really big leading to head gasket issues between the cylinders.Also with the long stroke you really have a short piston which will lead to possible ring land issues.if you want a reliable 1200hp i would go with a 427 with a 91mm t6 flanged turbo.

 

Im with va speed, That sounds like my setup im currently building. My issiues is turbo selection i want a 98mm because im going 4l80 e with a nice stall. Sorry for the hijack.

 

It sounds like a 408 stroker would be a better choice than the lsx454. I would still like to use the LSX block, ofcourse. I'm also going to be running a 4l80e trans. I really want something that is reliable....... Can you imagine 1200hp and reliable....hehehehe God I love turbo's.

 

OP, what are your intentions for this car? i.e. Pro Touring, Show, Race, Street warrior? Why 1200 hp? rwhp or fwhp? You just want a dyno sheet or do you want it to perform? What budget are you working with?

You need to have a clear and HONEST picture of what your TRUE goals are. Then you need to make a list of pros and cons and make sure that is what you want. If you don't do it this way, you will end up spending money twice or more.

 

OK, it's going to be a pro touring car. And it absolutley has to perform. My goal is 1200hp at the crank and still get 27+ mpg. It's going to be EFI, and I want to be able to take some HP away so the wife can drive it, and then I can get back on the laptop and and make her scream. "that is the wife and the car.....hehehe."

My budget is around $17,000, for the motor and turbo set up. I'm going to be doing all the ducting and piping for the turbo. I own a welding business and a lot of my work is stainless and aluminum work. So I should be able to figure someting out. Has anybody tried making their own inter-cooler set-up?

I'm thinking now a LSX block, callies crank, oliver rods, JE pistons, not real sure of heads yet.

So what do you guy's suggest. Also I was thinking a 408ci motor, but what about a 376? Is there any benefit going a little smaller?

Thanks again guy's. You've already saved me a ton of money on mistakes.

 

I wouldn't be so hung up on a FWHP/RWHP #. Just as long as the car out-runs everything out there, what does it matter what it puts down? I will be building a 370 with a TC78 (I know) and a TH400, it more than likely wont make great numbers at the dyno, but it'll be fast as hell!

376, 408 and the LSX are all great options. Any one of those motors can get you VERY far with power when set up correctly

 

408ci regular iron block with a turbo would be the cheapest option.

What is pro touring ? What sort of power delivery is required ?

 

Now there is a good post.

I like short stroke big bore. I would build a 3.622 stroke with a 4.1-4.125 hole. Throw a set of 6 bolt 235-245's on it and a single 94mm. Top it off with that tall Edelbrock intake. It'll work. It'll also give you lots of power range with the proper electronics and with a mildish cam, would be a pleasure to drive. FYI, you will have to turn it down on the street regardless as it will make tire smoke at any MPH on the 1200 hp setting. It really is useless for the street at that power level.

Exactly

Pro Touring is the fad of taking old cars and modernizing them thru new power plants, electronics, interiors, suspension, paint, etc. Think Chip Foose and about half of what you see at SEMA. The purists hate it. I love it.

 

I think $17K is gonna be pushing it. If that is JUST the motor and turbo setup you might be ok but all the other stuff adds up fast. It's easy to go through $30K+ real quick when doing a turbo build.

 

like i said beforif you really want 1200hp the 427 is going to be your best bet.Lot's of people will try to tell you how to do it-but 95% of them have never built a motor let alone a 1200hp engine.The parts are only 30% of them battle-it's all the little stuff that will make or break an engine like this.I suggest you align yourself with a good engine builder that has experience with ls engine like this.


FYI-we are building a 1200 hp engine for a pro touring car-the engine is around $26,000.00 complete.These thing saren't cheap when you make them reliable.

 

Cool Shawn looks like I have a little more saving to do.
Can you recommended anyone? How busy are you guys?

 

Shawn builds motors for all parts of the WORLD not just the US. He can take good care of you.

 

Extras do add up quick dont forget the fuel system too

 

A good solid mid-frame 91 mm will spool fast, be easier to package and easily do 1200 hp.

 

If you aren't going to be pushing over 20 psi I would stay with an iron 6.0L block. But if you do plan to bump the boost up then having 6 bolts around each cylinder makes the LSX worth the extra $.

Like Shawn & Nate are saying, making 1200 is half the battle. Making it live costs extra.
Things like Nasty's Stage 3 fuel system, a GOOD rotating assy, a 9", a big radiator, a tranny that will hold that much power....it adds up quick. I built mine to be pro street AND pro touring - just change tires & adj the suspension.

And having turbo with an electronic boost controller will make it easier to turn it from a grocery getter mama can drive into the friggin monster you want it to be. Mine with the blower is there all the time. It would be nice to be able to reach over & crank it down.....