I e-mailed Bullet and asked if they offered, or knew someone who could offer, a manifold for the VVTi 1uz. If they do, this could be a sweet bolt-on for $4,471! I post their reply.

From more searching, it sounds like they really know their stuff when it comes to Toyota engines. I'm sure they've been asked this question before. Like JeffTsai said, the VVTi version isn't as strong as its predecessor, but I also agree with evil00017--it sounds like the M90 is good for up to 6-6.5 psi, which it sounds like the VVTi could handle...

 

I talked to them 2yrs ago, but had no success. However, like I said before I remember seeing somewhere that they were working on a kit for vvti 1uz.
I think it was someone in Germany though.

 

I will persist--my dream is a SC'd 400!!

 

....(whispers)...."If you find it, we will follow."

 

That's not an issue. The issue is finding one that bolts right up for a decent price. Somewhere along the lines of what people paid for the RMM kit Sound like your real dream is to have 8-10 grand laying around for a FI kit because that's what you will have to pay to get a custom kit installed

 

+1, right on! and BTW I have personally contacted the few major companies that use to sell the "bolt-on" superchargers for the GS4...they mentioned that they would be willing to build one like the discontinued ones. Not sure if they want a lot of people to know this but they also mentioned a price tag of $8-10K as GS FONZy mentioned above. This is all inclusive; all parts, labor, install and tuning. Not too too bad if your GS is already paid off (like mine is going to be in 8 mos.) and can tell them to keep it at no more than $8K. There is not much more to do to a GS (performance wise) after you have a nice FI kit installed.

 

Agreed! A guy I work with I found out was on the R&D team at Mercury Racing (the boats, not the cars) up until a year ago when he came here. He worked quite a bit on these types of mods--the last engine he worked on was a V8 running FI @ 36psi pushing 1,300 horsepower! Dude. Anyway, I showed him my idea about an hour ago. He said it's doable, and he could offer suggestions along the way. I do not have access to a CNC machine, but I do have access to a awesome mill. I don't even have my GS4 yet, so I'm in not in a huge rush now. Also, if anyone with a roots SC on their GS4 lives near Wisconsin, I'd be interested in meeting up with them to see their setup, take a few measurements, etc. And, I'd need a stock intake manifold or two to play with... So if anyone wants to donate...

Lastly, are there any other issues here besides the obvious intake manifold differences with the VVTi V8? Any other issues to be aware of when slapping on a SC? I'm thinking I'd order the $4,471 Bullet kit and swap the adapter my custom unit. Then add an SAFC-II and an optional intercooler, have it tuned and call it a day? What's the weaker like in this engine--the high compression or weaker internals? Would 9 psi be doable or is 6 better? I don't want to do all this work for 75hp--I'd rather just get nitrous and be done. I'd need like 150hp gain to be worth it...

Doable?

 

Wouldn't cowl induction into the back of the SC be sweet?!

 

I sent them a couple emails asking about the superchargers. Here is what they said.

Q: I notice you have a universal 1UZ s/c kit. Does this kit work withthe newer 1UZ with VVT-I?

A: We have been supercharging these engines now for 10 years with fantasticresults.We have not had the chance to fit one of our manifolds to the VVTi engine,so I can't give you a definite answer. We think they should fit without too many dramas

Q: For the LS 400 s/c would you need to purchase a intercooler for itor would it run fine at 6.5 psi without one?

A: Our kit has been designed to run without an intercooler. The problem beingthat the Lexus and Toyota vehicles with this engine in it have very lowbonnet lines and we have only just managed to squeeze the Supercharger inunder this. With the addition of an intercooler, you would have to cut ahole in the bonnet as the supercharger would have to be lifted anothercouple of inches.We are getting over 300hp at the wheels WITHOUT an intercooler - you justhave to tune it correctly.

The last question is in regards to the older 1UZ without VVTI

 

With the addition of an intercooler, you would have to cut ahole in the bonnet as the supercharger would have to be lifted anothercouple of inches.

Maybe a dumb question, but why? Wouldn't the intercooler be inline with the intake piping? How does that affect supercharger height? Not that I would be completely against a hood bulge...

We are getting over 300hp at the wheels WITHOUT an intercooler - you justhave to tune it correctly.
(The last question is in regards to the older 1UZ without VVTI)

That's it? A header, exhaust, intake and a tuned Neo on a 400 will get me within 20 horse of that... Add 100 shot of nitrous for maybe a grand and I can use the money left over to take his girlfriend to Vegas for a week or buy some dubs to go pimpin' all VIP an' sheaaat. For $4,500 plus a likely custom fab of an intake manifold and a few other things plus tuning, I better be 400+ hp, and darn near as much torque!

 

Remember the 1uzfe pre 97 was only making 250hp or so and the older ones were even making less, so 300whp is a big gain. Also, the intercooler for these type of charges are located under the charger, not inline to the intake. That's why the hood would need to be moded.

 

Yeah exactly not bad gains considering they have 50 less hp stock.

I remember reading on here somewhere someone was runing about 8psi and making 400wheel or very close on a 400...might have been a 430 i forget.

 

It was a gs400 making 395hp @ 9psi
However; he is not using the same type of s/c we are talking about here and diferent set up will yield diferent results.

 

OK--400whp plus or minus on the 98+ 1uz-fe sounds much better, and more in line with what the guys on the FI Registry sticky are reporting.

(I posted a request in the photoshop forum for a pic of the 2GS with a hood "bulge"...not sure if there'll be any takers.)

I'm thinking that when I get my 400, I'm going to order the Bullet kit and modify it to make it fit (assuming I'd cut the runners off the Bullet manifold and weld on custom runners, possibly made in part out of the stock intake manifold).

Is anyone running ~9psi on stock internals????

.

 

You will be waisting money by ordering a kit that does not fit, but it's your money, so why not
9psi on stock internals yes. Stock fuel system and he was on meth too.