super_kev

iTrader: (4)

Has anyone done a LS1 swap into a thirdgen and then fabbed up a turbo system for it? I did a search and I didn't come up with anything. I'd love to do a LS1 swap, but I'd also love to have a turbo car, so I thought, why not do the LS1 and then slam a turbo on it? That way I can shoot for around 450rwhp and still be getting 25-30mpg on the freeway when keeping my foot out of it. In town it would be useless, I know. I saw the post on the Hawks magnacharger LS1 thirdgen, but I don't want a supercharger. Anybody done the turbo or any ideas on how hard it would be to use 4th gen turbo kits with some fabrication, or fab up my own stuff?

Guido

Im getting ready to but it will have a motorplate, truck manifolds turned forward and a larger than life turbo mounted on it. No stock water pump either. welding fittings on the plate and going that route. moving radiator forward. welding in a new upper and lower core support. The whole nine yards basically.

Dustin Mustangs

iTrader: (1)

T88

That is going to be quite some build Guido. Are you keeping the stock K-member? What are you looking at for engine management?? Do you have a time frame for completing this bad boy??? Do you have any pics you can tease us with????

That makes two 3rd gen turbo builds in the works on this board that have me shorting out my keyboard with drool.

Guido

I dont have anything going with this current build.

However, I do have my last turbo kit, and one I built for someone else both pictured on my webpage.

www.hustonstreetracing.com

both were on SBC motors

EDIT: Thats not true, I do have the block, heads, crank, intake, throttle body, turbo, intercooler core, wastegate, BOV

super_kev

iTrader: (4)

That's a big turbo. What's a motorplate? It sounds like a motor mounting thing of some sort. Sorry, I've never heard of it before. So you are taking the truck-type LS1 (LQ9, I think?) manifolds and using them as a starting point? Why wouldn't standard LS1 manifolds work?

midnight383

Don't know if engine bay space is as much of a problem with an LS1 in a 3rd gen, but don't rule out the STS turbo systems (the rear mounted ones). They're yielding great results as of late.

FSTFBDY

iTrader: (33)

ya ive seen a few Feature cars in the Mags with the sts kit. and They were all impressed. Im thinking about thi son my S10

but my Z Im going the conventional way. Single turbo up front. Still debating on which motor to finish. I have 406 parts layin around. 350 short block, and a Lt1 Ive been thining about doing.

Also a 6liter LQ4 motor I have access to but need a new intake up and harness.

super_kev

iTrader: (4)

High gains or not, I would never have a STS kit. Piping going everywhere, and an air filter in the rear of the car near the bottom, perfect for sucking up water and getting dirty fast.

Z28ricer

iTrader: (2)

This kit might be of use, probably with a different downpipe.

TexasLT1

what kit is that?

vejatabul

a right angle is terrible way to enter the header! ive seen some horrible turbo header designs this is one of them. look at the wastegate placement, it is primarly going to vent the first three cylinders and the opposite bank. not going to control boost very well. this header design could be improved signifigntly. just slightly turning the primary tubes so they enter at an angle would help. i realy like 4to1 headers, when the space permits. all the real big power turbo motors, like the f1 turbo cars of the 1980's , the gtp cars of the 80's, and modern indy cars have 4to1 designs. ive seen a few ls-series truck header/exhuast manifold turbo concauctions and they are a pretty good idea. go for it guido!

Guido

I am going to use a set of truck manifolds. I can get my hands on them for next to nothing. i had bought all the materials to build a set of headers, but its going to be much simpler to use the truck manifolds. Besides, they position everything easily and someone made 1600hp using them. I thikn they will work JUST FINE

ericmac450

You may or may not be horribly familiar with an LS1, I'm not sure...but you can easily make 450 hp out of an LS1 with just a cam. If you put a turbo on an LS1 and only made 450hp I personally would laugh at you.

A buddy of mine has a T76 single on his 99 transam and it made 618hp and 615tq @ 10psi. Forged bottom end, but stock heads, stock cam, and stock valvetrain.

Also, I've never been a huge fan of the STS kits. They are great for space savings, and while they are making big numbers on the dyno, they are not performing great at the track...they should be quicker for what they are making (making me think turbo lag) I dunno, just my honest opinion.

89JYturbo

Not to hi-jack this thread, but regarding the STS turbo sytems:

First, I am a supporter of the remote mount turbo idea. I laughed at it at first, but I build a RMT system for my 89 Cavalier to test the theory, and my Cavalier runs quite well (13.9 @ 99, and 14.1 at 103 on an otherwise stock 181k mile 2.8v6, 10 psi boost). My system has very good response (10psi by 3,000rpm) and has been reliable for almost 10k miles now, daily driven.

But, I am not very impressed with STS. I honestly feel they are one reason why the RMT idea gets a bad rap. Their systems are pricey for what they are, and so much of the info/specs they give is very shady.

RMT systems are ideal for quick, easy installations and work surprisingly well, but are not the way to go if you are serious about performance.

super_kev

iTrader: (4)

Hijack! Hijack! haha that's fine, no worries.

No, I'm not very familiar with the LS1, although I'm reading a couple LS1 forums right now to find out more about it. I know that it responds well to some modifications, but with a stock LS1 getting around 330hp, I didn't think I'd be able to get an extra 120hp with a cam. And I'm looking for 450rwhp too, so that's maybe 500 fhp, AND I still want to be able to get good gas mileage. I can make a standard 350 give me 500 fhp, but I'd be getting 10 mpg or so, and that won't do. Maybe with some good heads, cam, valves, springs, etc I could see a LS1 put out 450 rwhp, but the turbo gives you better gas mileage on the highway when you're not in boost all the time.

I'm just throwing the idea out there to see if anyone had done it. I'd be happy to have 550 rwhp out of my LS1 swap that I plan on doing, but I thought that a turbo LS1 with 450 rwhp was a good conservative place to start.

Doward

I honestly do not know where the idea that a non-spooling turbo gives you more MPG, but that is completely false. The turbo is a RESTRICTION in the exhaust, it cuts down on VE, and reduced your gas mileage - now, a properly matched turbo will not reduce the mileage any huge amount, but it will not gain you mileage, either.

ericmac450

My 99 Z28 is rated at 305hp at the flywheel from General Motors. With a lid and a cutout it put down 318hp and 337ft*lbs torque AT THE WHEELS...that's 375 flywheel horsepower. There are numerous LS1's with full bolt on's and a Trex (made by thunderracing.com) cam that are putting out 450hp TO THE WHEELS.

A heads and cam LS1 should put out between 420- 500hp at the wheels depending on certain factors.

A stock turbo'd LS1 (with proper fuel upgrades and tuning) should easily make 500 WHEEL hp at 5 or 6 psi and by 9 or 10psi be making around 600 wheel hp.

http://www.ls1tech.com/forums/showthread.php?t=235385

This car makes 600hp AT THE WHEELS, and will still probably get close to 22mpg on the highway! (if not more)

Dr G

I would love to see a system similar to this in a stock bodied thirdgen.

http://www.lingenfelter.com/performa...s1corvette.asp

Lingenfelter state their Twin Turbo LS1 427 CID puts out 725 BHP with 730 lbs-ft of torque. They claim in a C5 'Vette this gives 0-60 MPH in 3.2 seconds with street tires, 1/4 mile in 9.50 @ 145 MPH with ET street tires, and an estimated top speed 230+.

Just don't look at their prices though!!!

TPIMarow6.6

about the STS kit, they say you just bolt it on but what about computer tuning? the cars are MAF correct?

89JYturbo

STS used to give no info about custom tuning. That was one thing that kind of turned me off. IIRC, they now have a company doing custom computer tuning for thier kits, but it comes as an option (read more $). When you add a turbo, you need to add more fuel, either with a custom chip, RRFPP, or add-on injectors. I think a turbo kit needs to provide a method for adding the fuel as standard,. Then, if you don't need the fuel system, you can delete it for a cost savings.

TPIMarow6.6

that lt1 camaro with the turbo setup on it has it running through the maf sensor, and im not sure if they want to consider that stock but it must have had some kind of modification to the chip, but you mean rrfpr(rising rate fuel pressure regulator) lol your abreviation would confuse people. it would be nice to try that on my car but id worry about too much pressure on my plastic MAF sensor, and the tune of the ecm as well.

vejatabul

this turbo system was home-built by my freind curtis. 3.2l 92 cav.
http://www.turboz24.com/Files/12_31_run.wmv
that was with a leaking bov.
this is from last year with a dif turbo...
http://www.turboz24.com/Files/12_49_run.wmv
i think it is one of the coolest fwd cars ive ever seen!

miacamaro305

im planning on running a ls1 soon