Superchargin a supra

[djpokey]

My friend is thinking of superchargin his N/A supra, just wanted to know what you guys think. it's a '97 AT. Anyone else know of any supercharged supras?

[TheHayvn]

Turbo it.
http://www.f-max.com/fmaxlexusturbosystem.htm

[djpokey]

Only one problem, his Supra come w/ Toyota's VVTI system. Making his compression ratio too high to turbo, unless the motor is built, or the VVTI taken out. He wants to keep the VVTI, the supercharger should bring the car up about 100 bhp. Anyone?

[TheHayvn]

You're adding boost either way.
8-psi from a supercharger isn't any nicer to the engine than 8-psi from a turbo assuming both are either intercooled or not.

VVTI doesn't add compression, it's just variable valve timing.

The power gains from a supercharger or turbo are dependant on how much boost you're running. It's not just slapping it on and getting 100 more horses.

[WinnipegRacer]

Originally posted by djpokey
Only one problem, his Supra come w/ Toyota's VVTI system. Making his compression ratio too high to turbo, unless the motor is built, or the VVTI taken out. He wants to keep the VVTI, the supercharger should bring the car up about 100 bhp. Anyone?

Exactly how does VVTi increase compression?? How is it OK to Supercharge this motor, but not turbo it? How does adding a SC magically give you 100HP? Why would you want to keep crappy ass VVTi if it was using forced induction? Which cereal box did you and your friend get your information from?

[Soarer]

single turbo would be a better idea. i dunno if there are sc kits out there for the 2jzge but either way i personally would take the turbo route.

[djpokey]

The SC route was a custom fabricated test. I personally don't know about the supra motors, i figured the VVTI might raise compression. I guess i was wrong, but whatever. I've talked him into swapping out the 2jzge, for either a RB26 or 2jz-gte maybe a built 3sgte. Anything on that?

[turbo2.3]

Id go for the RB25det, cheaper and easier to find than the RB26dett. I think Top Secert has a supra with the RB25. not sure

[Ritz S14]

Originally posted by djpokey
The SC route was a custom fabricated test. I personally don't know about the supra motors, i figured the VVTI might raise compression. I guess i was wrong, but whatever. I've talked him into swapping out the 2jzge, for either a RB26 or 2jz-gte maybe a built 3sgte. Anything on that?

Oh COME ON! RB26? the car is already N/A. 3S-GTE? replacing a six cylinder with a turboed four?

Just turbo it.

[turbo2.3]

Originally posted by TRD-CHASER
Oh COME ON! RB26? the car is already N/A. 3S-GTE? replacing a six cylinder with a turboed four?

Just turbo it.


pssst hey! the rb25 is a inline six ;)

[PNG]

Just for the sake of argument, changing valve timing or LSA can affect dynamic compression by limiting intake flow or allowing reversion... But I don't think that applies here. :p

[Ritz S14]

Originally posted by turbo2.3
pssst hey! the rb25 is a inline six ;)

I said the 3SGTE is a turboed four.
The 2JZGE is an n/a inline six too. So what's your point?

[SiN-6]

Originally posted by TRD-CHASER
I said the 3SGTE is a turboed four.
The 2JZGE is an n/a inline six too. So what's your point?

well, All JGTC Supras use 3SGTE.:)

If the compression is too high, use a thicker gasket.

single turbo upgrade is easier. depends you use which turbine (size) no. 6 turbine will give massive lag. 4 might wont satisfy with the output.

btw. i dont think swaping in a RB is a good idea..

[djpokey]

Thanks for all the great info guys, if there is anymore post it up!

[turbo2.3]

http://www.sportcompactcarweb.com/features/0205scc_tokyo20_zoom.jpg

[SiN-6]

Well, if that is the Top Secret 1000Hp supra then its the exceptional. i dont see a point of swapping in a RB in a Toyota chasis. the money you spend and the work have to be done is massive. a car is not lego. things are not as simple as you may think.

[turbo2.3]

sorry, I was just saying that anything is possible. well, except for me to have an engine that lasts more than a few months :/

[SilviaSR20DET]

Originally posted by djpokey
Only one problem, his Supra come w/ Toyota's VVTI system. Making his compression ratio too high to turbo, unless the motor is built, or the VVTI taken out. He wants to keep the VVTI, the supercharger should bring the car up about 100 bhp. Anyone?

hey bro my RPS13 is VVTI and its got, you guessed it an SR20DET in it, that means its turbo, he can stick a turbo on there if he wants.

[SprchrgdPony]

Use a thicker head gasket? LOL! Have you ever seen what a High compression motor does with a bit of boost on pump gas? LOL! Can you say, KABOOM! This motor with a Supercharger/Turbo would have to either A.) Be very tuned down, and making hardly any power or B.)ALWAYS run at least 110+ Octane and somewhat build your bottom end stronger (maybe some ARP Head Bolts, etc.).

Then another, what type of Custom Supercharger setup are you thinking your gonna do on a 2JZ-GE? I'd love to see what a Supercharger looks like on a Inline 6cyl..LMFAO!

If you would like...have your friend check out www.toyomoto.com , they are a Shop in Miami that specializes in Supras, MR2's, etc., and have experience with doing NA-T Supra setups...

[A51_RPS13]

Why are you laughin about superchargin an inline 6?

You do have your points, which are valid, but just some other comments i got ... ( i do not intend to offend anyone )

Take a look ... if you subscribe to super street, this car is on the cover ... it is a IS300, which are very also fun to drive ( i.e. supercharged inline 6's ) There are other ways that you can run 91 octane w/ a stock block, think about some honda motors like b20/vtec or ls/vtec, the engine can/will usually ping, but there are ways around it, Dr. Charles Madrid ( Head or R & D @ A51 ) has perfected that. Just wondering what your thoughts were on that...

[SprchrgdPony]

Wow, just came across these from a friend...

Looks like a Vortech S/C'd 2JZ in a SC300 :eek: :helo:
http://www.sp-power.com/images/photogallery/SC_SCSuperchargemotor1.jpg

[A51_RPS13]

nice pic!

[xjdm94x]

Originally posted by SilviaSR20DET
hey bro my RPS13 is VVTI and its got, you guessed it an SR20DET in it, that means its turbo, he can stick a turbo on there if he wants.

Umm VVTI is toyota and SR20DET is nissan.. how exactly did you get your nissan engine to have VVTI in it?

[Wolf]

Originally posted by SprchrgdPony
Use a thicker head gasket? LOL! Have you ever seen what a High compression motor does with a bit of boost on pump gas? LOL! Can you say, KABOOM!

The thicker head gasket is used to lower the compression ratio.

[4G63 GS-T]

dude. if the guy is willing to drop the kinda cash needed to drop a rb26dett or even a supercharger in a n/a supra, why doesnt he just start off with a turbo supra. the 2jzgte has incredible power possabilities with all of the problems you guys are talking about addressed. thats my 2 cents.

[SilviaSR20DET]

Originally posted by xjdm94x
Umm VVTI is toyota and SR20DET is nissan.. how exactly did you get your nissan engine to have VVTI in it?

Okay my mistake, I was under the impression that all Sr20det's were VVTI but according to Nismo only the newer sr20's have it, such as the Chassis with the Engine Rear Slant


S15 1999+ SR20DET
S14 1996-1998 SR20DET
S14 1993-1996 SR20DET
S14 1993-1998 SR20DE

i do have the RPS13 made in 1993, but i thought that all 93' sr20's did have it, but it turns out that only the s14 did. And like i said this is info obtained by Nismo so if there is a discrepency (SP) you can take it up with them.

[666TX3]

Originally posted by SilviaSR20DET
Okay my mistake, I was under the impression that all Sr20det's were VVTI but according to Nismo only the newer sr20's have it,

I think you mean variable valve timing. You may as well say your SR20 has VTEC. But you are right about the newer SR20's having variable valve timing.

[XTC Dynamic Supra]

Originally posted by 1.6DOHC
dude. if the guy is willing to drop the kinda cash needed to drop a rb26dett or even a supercharger in a n/a supra, why doesnt he just start off with a turbo supra. the 2jzgte has incredible power possabilities with all of the problems you guys are talking about addressed. thats my 2 cents.


The difference in price between a tt supra and a na supra is big. An na mkiv can go for 11-15k. A TT goes for 35k-40k used.

[FanaticalKilla]

Nissans Variable Valve Timing is called CVVTC.

[SprchrgdPony]

Originally posted by Wolf
The thicker head gasket is used to lower the compression ratio.

Yes, i know that. But unless they wanna make average #'s, they would have to detune it like a bitch to run good. You cant just slap a Supercharger/Turbo on it, with a Head gasket to bring the boost down, and expect everything to be ok. Chances are, they will do one of these, and the motor wont survive very long. Just my .02


A51.. i know there are ways around it, hell, im running 34* Timing Total, (25* initial, if you know what any of that means) on 87 Octane with no detonation/pinging. Its called tuning.. but chances are, these kids have no clue on how to tune this setup to run good, so like i said, either Supercharging or Turbocharging this setup, is just gonna make the engine blow quicker unless they have it fully built & tuned.

[A51_RPS13]

I know that...Dr. Charles Madrid is one of the best tuners that I know of, who works for A51...Don't believe me? Take a 1000whp SC300 tuned? Or a EK civic w/ a K20-R motor? <---- He can almost do anything...Thank you for you info though. I understand were you coming from, not a complete moron...complete....:haha: ...Supercharged Pony, your right...Thanks for you info too...

[A51_RPS13]

I know that...Dr. Charles Madrid is one of the best tuners that I know of, who works for A51...Don't believe me? Take a 1000whp SC300 tuned? Or a EK civic w/ a K20-R motor? <---- He can almost do anything...Thank you for you info though. I understand were you coming from, not a complete moron...complete....:haha: ...Supercharged Pony, your right...Thanks for you info too...