lets see I am going to work on getting numbers for an inline (one small turbo and one large turbo) feeding each other out of junk yard turbos and my old trampoline frame. I have a friend and neighbor that has a 97 LT-1 camaro that he is going to supply the money to buy anything needed and I am to supply the fabrication welding and labor to build this set up for him it is completely stock now and I figure I can pick up around 90-100 horse with a set up like this and expect under 1000 bucks with a dyno tune once the turbos are on. I will take plenty of pictures of the build and post with final budget and with dyno graph. Does anyone have any old stock turbos with internal waste gates on them they would either donate or sell very cheap? I think the only thing that 150mudder would need to do would to route the intake for the turbo up as high as possible maybe even through the bed of the truck with a cover over it so that water would not be a factor.

 

yea, i think it would be a tight squeeze for me with the 4x4 and actually going off the road every now and then. i think if i really sat down and figured it out i could find a way to route it. would take alot of fab work. damn 4x4's, gotta love'em.

 

Fast83, Sounds great. Why do you think that an inline (byturbo) setup would be best?
When you say inline, do you mean both turbos being fed by the exhaust? Just one small and large hooked to the same exhaust pipe? (newbe to turbos and want to learn)
http://www.ststurbo.com/universal_system
Please take lots of pic. It looks like STS uses a oil pump to return the oil to the engine. Do you think that the best or will a pump to supply the turbo be better?

 

How much horsepower do u think u can get out of a mod motor (5.4,6.8) with a sts system? I also love the hissing sound of a turbo

 

I hoping to get more than you can get with a K-N cold air, Cat back and tuner. Done all that and still want more. I dont want to have to spent $4000. plus ether. I just see alot of turbo's on e-bay cheap and thought maybe could build my own.

 

Matt, I bet your mileages stinks. Nice truck though.

 

I am still pretty new to turbo aplication also I have been reading and talking with turbo guys a lot lately trying to learn also. It seams to me the complaints I hear all the time is either a) I run out of boost at higher RPM's or B) I have a lot of turbo lag. Which mean on the A. sinario they have a small housing causing the turbo to spool quickly but run out at the top end and with B. sinario have too large of a housing that causes much lag yet a lot of top end boost. So, if you use a combination of small and large you should be able to obtain a very well rounded turbo system. I am still working on the way I want this system to work I am still in the very begining stages. I am pretty sure I want to cut into the singel exhaust before the "Y" and adapt a piece of plate that mounts to the inlet platform of the samller turbo to the exhaust pipe already inplace under the car. then on the exhaust side of that smaller turbo come straight out with a short piece of tube 2 - 2-1/2" in diamiter depending on the inlet outlet sizes of the turbos I end up putting my hands on. with another mounting plate for the second larger turbo and then out of the exhaust side of the second turbo back to the factory exhaust now on the compressor side of the turbos the is intake and exhaust side also exhaust side going back to the front of the car and into the intake which will be "Y"ed together close to the turbo with one longer tube back to the intake of the car. now the intake of the turbos I am going to try and route them to the edge of the car to get cooler air with some good filters on them. I will not use intercoolers or exterior wastegates the long run back to the front of the car will give the air time to cool before the intake of the car and the turbos I want to use will have internal wastegates.

What I am looking to get for this project is 2 junkyard turbos probably one off an import and one off of a deisel truck to get my two sizes I already have some tubing (I hope will be large enough trampoline frame) I will also need two cone style filters. also key things is your fuel will need to be greater so I think a little larger injectors with a boost a pump fuel pump set up and a dyno tune hopefully I will not need but will research further (new MAF).

 

i think a 30% increase through the whole powerband is very obtainable with 6-10psi of boost for less than 1K. This is what attracted me to doing this project if you look at the car I am doing lets use nice round numbers for ease the LT-1 is 300HP stock 30% is 90 HP so 390HP in a Camaro is easy breaking 12.3 or so now I am not real sure what the actual RWHP of a 97 LT-1

 

Thanks Fast
So your runinng the turbo's in series (exhaust side). In thru the small turbo to the larger turbo. Wont the smaller turbo restrict the exhaust to the larger so the larger wont spin up to boost? I know that parallel probably would not work either because you would split the exhaust flow between the two turbos. Please tell me more when you get it more of the details workout.

 

Correct series is what I am doing and yes it will restrict it a bit but I don't need the larger turbo to start boosting till 4500 to 5000 rpm anyway so it will have plenty of time to spool up. Remember the reason I am doing this type of twin application is to make use of the turbos throught the WHOLE POWER BAND this is not a new concept many supera guys are doing the series set up but I am just working the same thing under the car

 

Ok, I cant wait to see some numbers. I dont think that I will be much above 5000 rpm. It would be nice to get into boost over the whole power band of say 1800,2000 to 5500 rpms. I know if it was easy all the auto makers would be doing it.

 

thanks sandbar norm

 

The need for an intercooler is based more on the compression of the engine and the amount of boost applied. You're not going to lose that much intake air temperature in a tube from the rear of the truck to the front. But if you're running low boost on a low compression truck, you should be fine.

For the guy working with the LT1 Camaro, they should be in th 250 RWHP range for a 6 speed. They're also about 10.5 compression with fragile pistons, so I would recommend running VERY low boost one a stock one unless you're going to use some injection or an intercooler. I would also abandon the sequential turbo idea and use two smaller properly sized turbos. Properly sized smaller turbos will spool up quickly and provide enough volume to produce the HP desired. Sequential systems are pretty problematic and I've seen more removed to add a big single turbo than anything else. If the end goal is only to add 90 HP, you can probably do that with two small turbos off of an old turbo caravan. They're pretty cheap on Ebay and have an internal wastegate.

 

Their turbos are custom made for their remote location

 

Actually, they are not. They include a pump to pump the oil that would normally gravity drain back to the engine pan.