I have a buddy who is turboing his VG and I was wondering what kind of boost you guys were running, how you set up your turbo, what you were dynoing, and what you were doing in the quarter. I know there are alot of fourth and fifth genners on this forum, but I'd like to hear about some 3rd gens

I've only seen a few boosted 3rd gens, mtcookson being the only one I can think of off the top of my head, but I havn't heard about any dyno's or 1/4 mile times.

BTW: If you have a 2nd gen with a VG be sure to chime in too

 

i've dynoed but it didn't go to well. popped a pipe off, fixed it, then busted a coupler on the piping. the printout they gave only got it up to 4000 or so rpm and i don't believe it was running good the entire time and definitely wasn't tuned however, i'm pretty sure during one of the test runs my friends and i saw the computer read around 210 or so hp at the wheels. i could be wrong so only another dyno will be able to tell.

1/4 mile times i'm hoping to be in the 14's but of course won't know for sure until i get out there... which i can't do until i get some stupid *** cutoff switch since i relocated my battery to the trunk. i can't win...

there's a few other vg turbo 3rd gens, they are just hard to find or not even on the forum. i think there is one at www.turbomaxima.com that was there a few times. if i remember correctly he has a very bad *** setup and was dynoing at something like 300 whp or more. i believe he goes by the name quake.

 

There is a guy with a boosted canadian 2nd gen. Still unsure of what he's putting down, but he did a VG30ET swap in, non-intercooled, running stock boost (4-8psi). Guess is he's about 225 or so at the fly. He says the car pulls hard, and can more than max out the speedo, with the car still pulling hard. I'm working on plans to turbo the N/A VG (especially after seeing what VQ guys are doing, I don't think it's going to be hard on the motor...it is an iron block, and does run 9.1 or so cr). Planning to start off with a 300zx front exhaust piping with the turbo flange on it, and a T3. Then work my way up there. Probably going to use fuel management, like a cartech or something...however I believe you can just swap in the 300zx turbo ECU and not worry about it...just have to run a knock sensor in if your car doesn't have one like the 2nd gens.

S

 

Have either of you considered just sending your computer off to JWT to have it reprogrammed? And maximase86, how are you going to mount your turbo? Are either of you going to use an intercooler?

 

For the time being, probably not. Maybe in the future, but for what I'm planning just to get started, a 300zx turbo ECU, or fuel management will work for now. Eventually I will move over to a t3/t4, but for now I'm just going to stick with a T3. When I start off, no I won't be intercooled, but again, that will be eventual. I still need to find a place to mount one, and space isn't a 2nd gen's forte. As for mounting the turbo, I'm going to use z31 turbo piping...I should only need the front one, my crossover should bolt right up. Then I'm going to make a custom pipe that will run from the turbo flange to the turbo which will sit over my bellhousing. I could mount the turbo in front there, but that would require me to make a custom engine mount, ditch the a/c, make a custome altenator pully, and remove on of my cooling fans, and I'm not digging that. With all the stuff that is coming out to do this project, I will have plenty of room over the bellhousing to work with if I relocate the battery to the trunk. Either way its going to be a work in progress. jeff92se is actually helping me locate a t3 and the front manifold. After that it's just getting a few other parts, and just putting it together really.

S

 

Let me tell you what my friend's setup will be and you guys can tell me what you think. He'll be using the stock VG block with 86 300zx turbo manifolds and the 300zx t3 turbo. The turbo will be rotated 180* and mounted to the turbo manifold so there won't be a need for a different motor mount, but he will be taking out one of the fans. The injectors are from the 90-94 ZTT and he'll use a Walbro 255 fuel pump. He's possibly going to use the 300zx maf, and will be having JWT reprogram the ECU for the turbo setup. Lastly he'll be using an EVO 8 intercooler. That's pretty much it except for other odds and ends like the manual boost controller, 3" exhaust and blow-off valve. It should be good to about 12 psi consistently with the intercooler. I'm curious as to what kind of numbers this setup will produce though, does anyone have any idea?

 

that setup sounds good. my guess, seeing Z dynos and such, is it would be around 250 whp or so. i could be way off though. its real hard to tell.

 

Hmmmm, curious, when you say stock VG block, are you talking about a VG30E block, or VG30ET block. There are differences between the two, primarily compression, about 9.1 for the VG30E, and around 8.1cr for the VG30ET. A VG30E should be able to handle 12psi no problem, but I'd keep a careful ear out for detonation more than I would with a VG30ET block...but then again, with the sounds of what he doing with fuel (370cc injectors, walbro pump), he's probably gonna be dumping fuel in anyway...which will help negate that.

S

 

For the ecu setup I'm probably just going to program my own eproms. I like the idea of being able to change everything in real time instead of sending the ecu off and waiting for a while to get it back.

I'm planning on going with a front mount setup but kind of hidden. I'm going to attempt putting it behind the grill so it will be harder to see so I can attempt to keep the sleeper look.

 

you'll be fine on the stock block...there was a Z31 guy who bought a used VG30E n/a block, slapped it in his Z with the JWT 450 package and successfully made ~400+rwhp...in all reality 9:1CR is hardly anything to worry about @ 12 psi. VG30E is no weakling, the secret will be in the method of fuel/ignition control

 

[10 character bs]

 

Oh yeah, sorry, we're talking about using the maxima block, so 9:1 compression. The JWT ecu upgrade should be okay for the fuel and ignition management. We're also possibly looking at getting an MSD ignition upgrade, but I'm not too familiar with MSD to know which one he's talking about. Would it even be worth it?

BTW: what do you drive DA-MAX?

 

Honestly, I read something up on z31.com, and I guess the guy that runs it seems to think it's a waste of money. I can see it helping fuel efficiency, but I think the VG coils are more than capable enough anyway. As for the block, cool. Besides, I think you can get more ponies with a turbo N/A block then the turbo block anyways.

S

 

pretty sure mtcookson is using the MSD 6AL. VG ignition system is very efficient as is..ignition amps are a plus, but not necessary. the turbo 3rd gen me and my friend have been working on(forever ) has the JWT 370cc program...but of course the project has yet to be completed(SR20DET project came up ) other than a quick startup, I have no real clue on how good their programming will work on his 3rd gen. personally I'm all for standalones, I see us doing some corrections via the AFC, cause I can't see JWT 100% getting the tune down exact to 12.5, but we'll see, I'll bet its REALLY close though, they are the "experts"

the nice thing about the n/a block is the 9:1CR, which I think is the optimum CR, but the lower 8:X on the VGT does give that extra margin of safety and ability to boost higher. but both blocks are super strong...I mean look at the 4th gens making 400+ on high *** 10.5:1 CR motors @12psi+...and the VG while not as powerful is an iron monster compared to the VQ

and oh yeah I drive an Integra

 

Don't forget, they are torquey SOB's too. On my 2nd gen, just a cone intake, and 3rd gen 5-speeds as "mods", my car put down 168tq at the wheels....stock is 167tq at the fly! Either way, block is stong as hell. I see the VG blowing up heads before the block gives.

S

 

i have the msd 6al but am not using it at the moment. turns out you need the tach adapter on our cars, at least i'm pretty sure. i can get the thing to spark with the engine off (turned distributor manually while it was out). when i try cranking the car it won't work so i'm almost positive it needs the adapter. its supposed to make it work when there is a no run situation.

 

You guys seem like you know what you are talking about, what do you think the optimal setup would be for VG turbo setup without internal modifications? (still talking about a maxima VG)

 

T3/T4, fmic, 370 cc injectors, 3 inch exhaust, jwt/stand alone ecu, manual or electronic boost controller, and turn up the boost.

the stock vg can handle quite a bit of power so, as long as you keep the fuel supplied to it you should be able to pull a decent amount of power (easily in the 300 or so range tuned properly and all that).

 

MSD techs told me the same thing when I was inquiring for my old car...so tach adpapter it is

 

I run a JDM 84 VG30et changed over the inake manifolds, distributor,valve covers, oil pan, injectors, water pump, water pump houseing, alternator, power steering pump, and all there brackets to 3rd gen parts. I kept the turbo in stock location and made a custom motor mount and downpipe. I am running non-intercooled about 6 PSIs most of the time and on a real cold night about 10. I thought about doing the same thing you are thinking(rotating turbo 180deg) but if i remeber there is a little problem with that, I think the turbo wouldn't fit with the starter in the stock location. The intake side of the turbo would hit the starter. If i could do it again i would have used a 87 or later because mine has the shorter crank and it made things a little tricky.

 

i think also if you flip it over so that the compressor is on the driver's side it gets very, very close to the radiator. actually, if i remember correctly, we couldn't even do that with the stock fan shroud on.

 

Rosa if u wanna check mine out all the info and setup is on my cardomain page (link in sig) ill take more pis im running 9psi intercooled but have internal mods but it may be of some help to you

 

is your turbo being spooled of both exhaust banks or just one

 

Just the Front, Its a Garrett M24 off a Skyline cant get any more than 11psi and it was alittle pain in the *** to tune but other than that it works great for me! It spools up around 2,800 RPMs and im gussing that its in the area of 220WHP at 9psi. Havnt dynod since putting it on so i could be way off, Im running 14.58 in the 1/4 at Liechester Raceway in Liechester NY. Thats completly empty with no back seast trunk bear and about 1-2 gallons of gas and there are a few other mods under there too that are 1 offs like my stacked throttle bodies that consist of two throttle boddies in a row acting as a spacer but the holes for the butteryfly axel i have fitted with fogger nozzels that iam not using yet but will be soon hopefully, 87 Supra Turbo Intercooler, complete upper intake system was ported and polished and matched to each and every other piece.

 

Is anyone using the stock z31 manifolds to mount their turbo? If so, do any of you have pics? I still plan on turbocharging mine but, it is on the backburner at the moment. I want to get an idea of clearance and whether or not I will need to make a custom manifold. I'm toying with the idea of several HKS turbos. Mainly I was looking at an HKS gt3037 pro S, due to the fact it is a t3 flange and still has an internal wastegate, so it technically should mount on the t3 z31 manifold, however I'm not sure if there would be enough room between it and the radiator, or whether something else might be in the way. More than capable of my goal of 300fwhp, and would definitely spool quickly.

 

I think if either of us gets any time we'll actually finish this damn car