Any input on single turbo "Squires style" in rear of truck?

[T45]

I am working on a swap of a VH45 into my Frontier 4x4. I bought a Q45 the other day on ebay and have been browsing nonstop to gain as much insight as possible. I keep bouncing back and forth between na and turbo. I know turbo is useless offroad but I am looking at it like this....I will still have a V8 versus my current 3.3 V6 so even unboosted would provide more power than what I have now. And the fact that every video I see of a TT VH45 gives me a hard on just makes me want one!!! lol Honestly I am going to be happy with just a V8 but of course have my dreams so here goes...

My idea is to run a single turbo in the bed. The exhaust will be stock manifolds 2>1 and then run through a high flow cat and probably round muffler before turning up into the truck bed. Then after the turbo I could just run it back down and out. Turbo output would then run back under truck to IM.

I had ideas for finned aluminum piping from turbo to IM to act as an intercooler. I also have enough room up front for an intercooler as well.

I plan on using a small, quick spooling and low lag turbo, and the factory ecu tuned for boost. I just found a thread on pocket roms and whatnot so I have more studying to do.

Any input on what issues I may run into would be great. I am kind of lost on a few things and just want to make sure that it is a feasable project worth the time and money...

1. What material to make exhaust out of from manifolds to turbo? Would typical aluminized steel work?

2. What kind of turbo should I start looking into? I'm a boost novice.

3. What controls the amount of boost that the turbo puts out?

4. What controls the blow off valve? Some kind of spring valve?

5. Any links like http://www.boostfordummies.com would be great!!!

BTW, here's a link for my project. If I fail at boost I think I will just run a ram air from the hood scoop...

http://pg.photos.yahoo.com/ph/...hotos

T45

[defrag010]

for the turbo, you don't need any special headers or anything, you just need to merge them VIA y pipe into a single exhaust for the turbo out back.The one thing you will need to be concerned about is the oil supply of the turbo. Squires sells a little electric oil pump with their kit that takes oil out of a tap in the motor, and pumps it through the turbo and back into the pan. Lines are long, though, and you need to make 100% sure they are protected from road debris.

You need a turbo that has a compressor wheel that matches the airfllow of your engine. You need to find the airflow of a VH45 at a certain rpm in CFM, and then convert that to lbs/min and find a turbo with a compressor wheel that flows at least 10lbs/min more than your engine. The general rule of thumb is that a turbo boosting in its efficiency range will yield about 10 horsepower per lb/min of airflow... so a turbo that flows 60 lbs/min is capable of around 600 horsepower.

I would look into Holset H1C's, HX35's, and possibly HX40's. They can be had for cheap, are built solid, and the HX35/H1C flow 61 lbs.min while the HX40 flows 70 lbs.min.

for what controls boost and stuff, that is the job of the wastegate. Instead of explaining that, I am going to direct you to howstuffworks.com where you can search for "how a turbocharger works".

[elwesso]

I think for your setup youd be better off with the VH45 supercharger.

[T45]

thanks for the replies. Who makes a VH45 supercharger? search turned up nada...

on second thought nevermind. i haven't even gotten the engine out of the Q and i'm thinking about trying to tackle a turbo/supercharger for it. I just need to concentrate on the swap for now. After I get it running I'll worry about more power. thanx
Modified by T45 at 2:42 PM 6/11/2006

[elwesso]

i agree with that.. get it running, then make it faster... its not gonna be fast if it dont work!!

[T45]

True that!

LOL, I'm still sitting here surfing the net looking at superchargers now. I was thinking about it and you are right, I wouldn't be happy with a turbo. The lag with these 35's would drive me nuts. I always hear superchargers are better for trucks and offroad and I was imagining it offroad in my head and it would just suck. I think I just got caught up in all the videos of that 450ZX-TT...lol. If I get 300RWHP I will be totally ecstatic! Honestly I have never owned a vehicle with over 225 or so.

Basically I'm working in PHX and we can't work on the weekends so all I do is surf. I got bit by the VH bug and bought a Q off ebay in PA. I live in VA so after the contract here is done I can go and pick it up. I only paid like 435 for it so even if the engine is trashed I still think I got a good deal. The wiring harness, sensors, accessories etc are worth it to me. And if I get a good base engine to work with then I'll be up even that much more $$$$. If the top end is thrashed then I'll just part out the good stuff and junk the rest. If I break even that would be sweet

Basically I was going to build the 3.3 but think about it....i just bought a complete V8 for the price of headers for the V6. If I dump another 1K into the swap then I'm still doing better than the V6. For 1500 spent on the V6 would only get me cams, headers and a chip....and for what? Like 225-250hp?

Sorry for babbling. Now you know why I'm bouncing all over. Stuck in a house out of town with no friends local and nothing else to do but day dream.

So anyways I found a couple supercharger head units on ebay but I must say, they are expensive compared to turbos. I searched and read your thread on the supercharger project. What are some head units I should look into? What are some I should stay away from?

[elwesso]

If you wanted to run my supercharger its all custom... Custom fabbed manifold, custom modified eaton Rootes type SC, and so forth...

the VG33E(R) is kind of a gay engine... I have no idea why they put the VG in there (along with the pathfinder) when the trusty old VQ was right there... Dont get me wrong, the VG is a great engine and I love it just like my VH, but its not enough juice for such a big ride... It will move the Z32 with a 5 speed adequately... but it aint gonna move a bigish truck.

The SC is great... its like nitrous, except you dont have to fill the bottle.. instant power...

[mtcookson]

Nah... it wasn't the VG33's fault... it was the crappy supercharger they put on there. An M62... granted its within the recommend engine size they should have put on an M90. It would have been so much more fun. Toss on a different pulley and it would have likely been able to smoke the tires.

[T45]

True. I hear all the time about how the supercharged frontier should be faster for what it is. Partly is because 95% of them are auto's. The other part is there is no aftermarket for them. You can get a pulley and whatnot but it isn't greatly supported.

I can smoke my 35's now with the 3.3 but only if I redline it and dump the clutch...then it just chirps 2nd. However it is still slow compared to my buddies titan. I may look and sound better doing it but he spanks me every time.

[mtcookson]

I had ideas for finned aluminum piping from turbo to IM to act as an intercooler. I also have enough room up front for an intercooler as well.

I didn't notice this the first time. I had that exact same idea. It should increase the overall efficiency compared to running plain pipes. I'd actually like to try something like copper for as much heat transfer as possible but copper is pretty high right now so that may not be a good option.

As soon as I get my new welding helmet in I'll be able to try all of that out and see how it works.

[T45]

Yeah tell me about it!! We are running 10ga. solid copper for ground and in 3 weeks it has went from $45.00 for 500ft to over $110 for 500 ft. It's going off!!!

[mtcookson]

That's amazing. I think just about everything is increasing in price really. I'm sure its mostly because of fuel costs too. I'm glad I'm in the shipping industry at least. That'll be something that will stick around until the next depression.