Triple Blowthrough Turbo

[Dat73z]

Haven't posted in a while as I've been busy blowing the car apart to a bare metal shell along with welding and rebuilding a bunch of stuff in preparation for the spring bodyshop dropoff date. 

 

For the turbo build I started prepping the tank for the in-tank FPG surge tank with integral Pierburg lift pump. I'll be running a single walbro 450 to start, with the option to run twins (3 pumps total including the lift pump) within the surge tank feeding through -8 and returning -10 directly back into the surge tank. Every fuel system I've ever ran in a s30 has been a compromise, so hopefully this will be the last fuel system I ever put together (for this car at least). 

Edited Sunday at 01:09 AM by Dat73z

[calZ]

The FPG units look nice. Do you have a link to what you bought? For some reason I m can only find vehicle-specific kits that mount like the stock pumps rather than with the universal ring like you have. 

[Dat73z]

@calZ if you are referring to the adapter ring there are no links as it is a custom one-off piece in design. 

 

What you see in the pics are the developmental 3d prints before machining and finishing. There are a couple of minor things to sort out I didn't show such as an integrated fuel sender with roughly the same ohms sweep as the s30 gauge. 

 

If you're interested in getting an assembly let me know and I'll get some pricing for you when the time gets closer to production. Lots of irons in the fire right now, but I'll dedicate a post to the updated fuel system later like the custom cnc intake manifold. 

[Zetsaz]

Out of curiosity how much baffling does that tank have? When I first saw them I was excited, but it almost looked like it was just that formed wall in the middle for baffling just like the metal piece that's in the center of the original one.

Edited Sunday at 09:14 PM by Zetsaz

[Dat73z]

@Zetsaz there is no baffling inside the VTS tank other than the formed center area. However, the formed center area fully blocks off the fuel towards the rear of the tank which perhaps has some benefit under acceleration/cornering but overall I'd say it's comparable to the OE tank. The main benefit (other than being poly) is the formed recessed component mounting area. I think earlier in the thread I showed some pictures of the modifications on my OE steel tank which required quite a bit of cutting/welding/waterjet custom tank ring for the fuel cell plate. I also sealed off the stamped center baffle and added one way valves. 

 

Either way nowadays there are a lot of options for fuel slosh control such as Holley Hydramat, Aeromotive Stealth System, in-tank passive/active surge tanks, fuel pump trays, etc. Each has their pros and cons but that's a separate topic 😅

[calZ]

It always depends on pricing, but I'd be interested. I like the fitting arrangement and the bulkhead electrical connectors, but not in love with having a separate lift pump. Holley, Aeromotive, and Tanks Inc all have pigtails or studs rather than the bulkheads, so it's a compromise no matter which way I go. 

[A to Z]

4 hours ago, Zetsaz said:

Out of curiosity how much baffling does that tank have? When I first saw them I was excited, but it almost looked like it was just that formed wall in the middle for baffling just like the metal piece that's in the center of the original one.

Doesn't the factory baffling wall work sufficiently?  I am asking as I thought it was sufficient as is.

[Dat73z]

@calZ sounds good I'll send you a DM when the time gets closer. I agree it's typically about finding the compromises you're willing to live with 😅

 

I've been continuing the prep process for the bodyshop and realize I need to check some clearances/brackets on the rear end. A few years ago I imported a NOS Reinhard full 60mm twin exhaust for this build. I figure the twin 60mm should be as good for single or twin turbos.

 

My Q45 r200 is getting rebuilt with a OSG LSD and for the rear end I was thinking of upgrading to all Escort Japan pieces including their extended rear diff cover. The problem which may present is how the r200 (and so far as I can tell the vintage Nissan Comp systems) wrap around the rear of the diff. I only have one grainy picture of a full Reinhard exhaust installed so later this week I'll test fit it up with a spare diff to see. 

[calZ]

Do you have a T3 kit that uses the Q45/Z32TT wheel bearings as well? I recently found and ordered some new OEM rear bearings for mine. You maybe know this already, but they were out of production for like a decade and the only ones available were NOS for $450+ each. They must have done another production run, because plenty of places are selling them now, but still for the insane prices. I ordered from a UK vendor that cost for 2 what most places want for just 1. It was also the only place that actually listed the bore diameters, verifying they weren't just making the same mistake every major retailer in the US had made for the last 10 years of selling non-TT bearings as TT bearings.

https://zcentre.co.uk/product/300zx-rear-nissan-oem-wheel-bearing-twin-turbo/

[Dat73z]

That's good to know on the Q45/Z32TT wheel bearings. No I am running 280z stubs with the Q45 CVs and custom Moser cut shafts. I looked at the t3 Q45/Z32TT option a couple years ago when swapping out my t3 Konis/GCs and wilwoods and parts availability was definitely a concern. I ended up locking in on the KW and Stoptech setup for the long-term, so my weakest link is still the stubs 😅