The path to 500rwhp???

[GrimJack]

My point was that the lower spool time only helps from a stoplight - if you are driving, you just keep the RPMs above the spool point and it doesn't matter.

Starts to sound like you should be looking at a small ball bearing turbo with a max of 400-450 whp, and a standard flange so you can upgrade to a larger unit in the future if you so desire.

 

[jtamulis]

ok, ok STOP. 1st off you said you want this in a MKII. I assure you 500hp isn't
even remotely needed in a MKII. I have driven a 425rwhp MKII, and let me explain how
this car drives:

1st and 2nd gear are completely useless without drag radials:

1st gear you have to ease gently off the clutch with 1/4 throttle, then push to
1/2 throttle, then immediately shift to 2nd.

2nd gear you can push to full throttle, but by the time you hit the pedal to the floor
you need to shift to third.

oh did I mention the tires are spinning wildly?

Ok, now you're in third, whew, now you can concentrate on getting the car to go
forward, ease into the throttle and gently push to WOT, when you hit 5000, you'll
need to get ready to shift, yup redline is there.

4th, ahh finally. ok, you're in 4th you have traction, and then at 80mph the boost
guage hits 18psi, and the tires light up again, ease off ever so gently and hold on,
steer. 425rwhp+ in a street MKII is completely pointless. Chris's MKII after that we
decided on about 350rwhp. After driving a 350rwhp MKII, its MUCH more fun to
drive, you can drive it in traffic, and it doesn't have any lag to speak of and its a
whole lot FASTER AND QUICKER than a car with more HP than the tires and suspension
can handle. I have about 350rwhp in my MKII now, as 425 was just too much.

BUT that being said if you want 500rwhp, and in a MKII, this is what you need
to do:

Quality engine rebuild with forged pistons, metal head gasket, lexus, 550s, walbro,
fuel computer, fuel pressure regulator, etc. Then get a bolt on t3/t4 hybrid turbo
(you can go true T4, but its not really needed), then start working on getting your
new transmission in, and the new custom rear-end.

at 350-400rwhp you'll be breaking stock transmissions and rear ends often.

oh a 60-1 trims CT-26 with a non-clipped exhaust wheel will make a solid 350+rwhp
and spool up fast as heck . If you are close to me at all (raleigh NC) I can take you
for a drive in my MKII.

Good luck.

Jeff
1984 7M-GTE powered MKII 350rwhp

 

[GrimJack]

Damn, I can't believe I missed the Mk2 specification - but I sure did. The description of a high power Mk2 is pretty much spot on.

He's in Greece... that's a bit further than most people would like to drive in an sfternoon to reach NC.

 

[yannis-supras]

ok, ok STOP. 1st off you said you want this in a MKII. I assure you 500hp isn't
even remotely needed in a MKII.

Hey Jeff it's Yannis, you may remember me. We've pm'ed each other in the past. I thought your name sounded greek but your wife is greek actually... Any bells???
Anyway you're spot on on the power issues there ( you ought to be since you fix and drive the damn things!!!). From what karaki, Dave Sheperd and william82 told me already it is a bit overkill to run that kind of power on our cars. That's why a couple posts earlier I clarified to GrimJack what I'm actually after. 350 maybe 400rwhp and retain the ability to run higher boost up to 500rhp occasionaly.

I have driven a 425rwhp MKII, and let me explain how
this car drives:
1st and 2nd gear are completely useless...ok, you're in 4th you have traction, and then at 80mph the boost guage hits 18psi, and the tires light up again, ease off ever so gently and hold on, steer. 425rwhp+ in a street MKII is completely pointless.

What a test drive description though, I'm having wet dreams already ;-) . That's the reason I got the long ratio crown n pinion for (lower than 3.58, I think 3,1 somethin not sure) to try and eliminate the 1st, 2nd gear mad wheel spin.

...its a
whole lot FASTER AND QUICKER than a car with more HP than the tires and suspension
can handle.

I believe that suspensionwise my set up will be up for it. If you check my original post I list the stuff I've got and what I'm planning to get. After all it was the conversations we had together and your suggestions that pointed me to the chassis mods.


What's your opinion on the twin setup though Jeff? Any suggestions there, I'd love to run twins. If I'd go single I thing I'd choose a dual ball bearring GT3040R with 0.82 A/R. It's not that expensive (about $1300), it's good for 550hp and it spools up quite fast so I've heard.

 

[yannis-supras]

He's in Greece... that's a bit further than most people would like to drive in an sfternoon to reach NC.

Well spotted GrimJack

I'd love to have that test drive with Jeff anytime but I'm a bit far...

 

[jtamulis]

Yeah I remember, life has been fuzzy. Here's my suggestion. 1st off, with the 3.58
It will greatly lower the on tap torque of the 7M, making it less-fun. 2nd, if your goal
is 350rwhp, that's EASY.

metal head gasket, lexus/550s, walbro, fuel pressure regulator, AFC, and get a good
wideband, you'll need it.

a good clutch (I can get a discount at RPS, so contact me).

all that and an upgraded ct would work, Altho I'd think a t3/t4 hybrid would be nice
if you've got the gear low enough (which you do).

Here's a description of a ride in my car as it sits:

Smooth as butter take off in 1st gear, but will go sideways if you hammer it in 1st.
a quick shift to 2nd gives a 1 full second tire chirp. 2nd puts you back into the
seat nicely, and a quick shift to 3rd gives a quick chirp of the tires and 3rd pulls
nicely up to 80+mph. Well, I pretty much stop there, but it pulls nice in 4th and 5th
too. I have about 350rwhp and 3.73 gears. I think with the 3.1 gears you'll actually
not like it as much. A 300rwhp MKII with 4.30 gears is GREAT to drive and is Very
"Punchy" A 350rwhp MKII with 3.73 gears is very smooth, and has a nice long
powerband.

If you haven't already get yourself a 4.30 gearset and a 3.73. I think being in greece
you have lots of highways in the mountains yes? I would think that the 4.30 would
actually be the most "fun" because you would be shifting gears a lot. And with 300
to 350rwhp you'll be plenty fast enough for anything but long open STRAIGHT
highways.

Jeff

 

[yannis-supras]

What's your opinion on the twin setup though Jeff? Any suggestions there, I'd love to run twins. If I'd go single I thing I'd choose a dual ball bearring GT3040R with 0.82 A/R. It's not that expensive (about $1300), it's good for 550hp and it spools up quite fast so I've heard.

 

[jtamulis]

You're thinking WAY too much. 1) twins are not worth it.
2) the big turbos cost too much $$.

I assure you, that you will be EXTREMELY happy with this setup (and it's cheap too)

MKII, 7M-GTE and 350rwhp, and stock 4.30 gearing. Unless you have LONG STRAIGHT
roads, you'll _love_ that setup, and that can be done on a stock motor, with a MHG
and an upgraded CT-26. I've had High HP MKIIs, and if you want a street car MKII
you do NOT want to go that big, it won't be worth it, trust me, I've been there.

350rwhp can be done with a 60-1 trim CT-26 with a NON-clipped exhaust wheel.

Please, please, listen: You're overseas, its hard to find the parts for your car, if you
get this big setup you're looking at you'll spend WAY more time fixxing your car than
driving it. And you'll spend more money than you have to.

If you goal is to be the quickest 0-100MPH car then 350rwhp and a non clipped CT-26
is your best bet. Your top speed will be about 125, but you'll get the instantly, and
it will be controllable (barely).

You're spec'ing out a drag car for the 1/4 mile. It'll SUCK on the street. It'll be VERY
laggy compared to the 60-1 trim CT-26, and it'll break parts left and right. Even a
good ball bearing turbo won't be good enough.


350rwhp is the magic number for a STREET MKII. you use 4.30 gears if you like
spinning the tires (helped if you get good tires)

4.10 is a LITTLE better

3.73 is nice for a highway car

3.42 would be good for high speed runs only, and frankly the car wasn't built for that
kind of use and its not that happy over 130mph, with any gearing. I have a fully
upgraded suspension, and great tires. I shut it down over 120, I have 3.73 and its
nice, but I like burning rubber, and a good set of 4.30s and good 16" rubber is what
I will go with eventually.

 

[jtamulis]

I want you to be happy, I want all supra owners to be happy. You have have a MKII
you can drive EVERY DAY and drive it hard with 320rwhp and never break anything.
You start pushing past the 350 mark and stuff WILL break.

Reg Reimer said (and its SOO TRUE)
"Anything over 350rwhp and its driving style and a mater of time before stuff breaks,
up to that point the car will handle it flawlessly."

Jeff

 

[yannis-supras]

Well I think after some thought and reconsideration and after taking in all this info you all provided generously I believe that the following setup would make me plenty happy (Jeff ):

SSautochrome crap manifold for copy
GT3040R .63
Larger FMIC
2.5" IC pipework
MAFT & 3.5"MAF with 550 or 620cc injectors
walbro (or mkIV) fuel pump and FPR
3-3.5" downpipe and exhaust
ASFC and the AVCR I already have

I think I'll be set with these for an easy 350rwhp + when feeling loony enough wind up to 500rwhp and even with my long ratio crown 'n' pinion I'd still manage to do some rear tire chirping ;-) !!!

 

[jtamulis]

Sounds like a plan.

Jeff