Should I Do It? Turbo Upgrade

[Kaido_RR]

what clutch, suspension and brakes are you running?

[bubba]

My powers of deduction tell me that the GT35R .63 housing has made 345rwkw @ 21psi on msnismo's RB25, doesn't sound like it's choking up but I was say that it's probably nearing the limits of the .63 housing..

Might be worth seeing if her setup is still for sale..

http://www.skylinesaustralia.com/forums/Fs...gh-t238142.html

Edited October 30, 2008 by bubba

[Pattygtst]

hmm very interesting bubba thankyou. That has saved me some searching. That may change things for the housing at least but i still think its the right turbo.

Only problem there is it doesnt show what rpm it hit full boost. She did say though full boost by 3800 so we will assume she is correct. That is very good.

It would save me about 1500 if i got hers but with etm i am getting a better manifold, wastegate, dump pipe, screamer, oil lines etc all ceramic coated brand new. I need peace of mind.

I have some pondering to do.

Edited October 30, 2008 by Pattygtst

[Pattygtst]

HD excedy clutch will handle over 300kw easy. Breaks and suspension stock

After a quick chat with tuner and leigh.

They think the .63 housing is pointless on the gt35 as the top end goes out the window especially since the 25 wants to rev its impractical. You can see on the dyno that its chocking on the high rpm. That power figure seems suss. Better of going down to a 3076r which is not going to get 300 more like 250 real kilowatts.

All good valid responses guys keep them coming.

Edited October 30, 2008 by Pattygtst

[bubba]

hmm very interesting bubba thankyou. That has saved me some searching. That may change things for the housing at least but i still think its the right turbo.

Only problem there is it doesnt show what rpm it hit full boost. She did say though full boost by 3800 so we will assume she is correct. That is very good.

It would save me about 1500 if i got hers but with etm i am getting a better manifold, wastegate, dump pipe, screamer, oil lines etc all ceramic coated brand new. I need peace of mind.

I have some pondering to do.

I wouldn't exactly say an ETM manifold is better than a 6boost manifold, they are both top of the range! what you would get if hers is still available is a proven setup that would be straight bolt on.

Her setup isn't choking, she said it was still climbing when it hit the 8000rpm limiter.. if a .82 doesn't choke a 30 I really don't see a .63 choking a 25.

I believe my setup is THE definition of choking *smirk* ~250rwhp @ 4600rpm which holds till about 5800rpm then in the space of 1000rpm it drops to 90rwhp

Edited October 30, 2008 by bubba

[Pattygtst]

Thats more like dieing, lol

Would be perfect if i had a 3l

[bubba]

lol yeah man, over 6k it dies in the ass bad - makes is real hard to hold slides and I don't like trying to hit 3rd while sideways

[Pattygtst]

its either gt3582 .82 housing or gt3076 .82 housing

My goal was 300rwkw on high boost. Question is then can the gt3076r make that in real power?

[MattyP]

I thought I was getting ripped off on my loan (12%)..well actually I am considering mates of mine are on 9-10% loans for the same amount... I think you need to keep shopping around, or at least change the length of the loan and then pay it outright when you have a chance.

[Pattygtst]

^ when and where did they get their personal loans on 9-10%?

[bryno]

go for a loan that allows early repayments and/or a lump sum payout, then consolidate both loans in to a citibank personal credit loan which has an interest rate of 7.9% on balance transfers for the life of the loan

[rev210]

So $7,500 to maybe $9k on a loan bolted to a fairly standard GTST worth maybe $13k?

I know people fall in love with thier cars and thats fair enough. But, consider what a budget of $20k+ will buy you in terms of an already modified car to the level you are seeking. I suggest you can buy something that goes better and has more money spent on it and be miles in front on the spend....then again we all do it the wrong way so others can buy our mega dollar heart ache for a bargain price

You still have about 'another' $12k on top of this turbo setup to spend before your car is going to be worth $18k, if that makes sense.

Having said that.

I would say that if you don't have the money to build this lying around you actually need to evaluate whether you 'can' afford to run a 300rwkw vehicle whilst paying off a loan? More power when used wears everything out real fast. Unless you want to pose in front of your car with a dyno sheet you will need to think about this aspect to cover yourself.

If you can consider that the best position to be in is one where you have the coin ready for a rebuild in your back pocket.

Also, does it matter if the car is off the road for a very long period of time?

On the question of the turbo selection others have mentioned the 0.64 housing on that turbo and I would agree it has all the legs you need.

You might consider the actual average power as a goal rather than the peak (unless you are the dyno queen type), it is possible to configure the selection of parts around a wider midrange goal rather than peak output. Depends on your ultimate reason for wanting 300rwkw and what you are intending to do with the car.

So what do you want to do with the car? If you just want to slap a big turbo on a car to say " I once slapped a big turbo on a stock RB25 " then no problem'o it's very strange but, what ever you like is fine.

If you are actually thinking about some sort performance goal then there might be some better suggestions to go your way. Don't want to see you do the usual merry go round alot get caught on with cars.

[inthisglass]

you want 400 horsepower while still having stock suspension, breaks and internals

i'd seriously look at doing at least the breaks if you want that much power

you can get 350 horsepower from a low mount turbo setup easily, just need fuel pump, ecu and injectors

my car makes 300 at the rear tyres and still has stock injectors

you will spend a lot of money for a huge laggy turbo that will get your car defected as soon as your bonnet is popped open when you dont need to.

and you havent mentioned what your want to do with the car. If its just for street use then your wasting your time, there is no need at all for that kind of setup for a street car

you will do what you decide in the end but you will save a lot of money if you just put on a bigger low mont turbo that will bolt straight on in a day that will still make awesome power and will be good to drive on the street.

[Pattygtst]

Yes very valid points.

I started from scratch with this car and made it look the way i wanted. I dont really want to have to sell or swap for another one with power and internal strength i desire.

280kw would be very much desired but nothing below 260. Ideally a 2835 pro s would have been perfect but there basically 4000grand now, 6 , months ago it was about 2600.

i have ecu and pump so all i would need would be injectors and z32 plus turbo setup.

I really dont no anymore i might just hold back and sit on it.

[Char]

with turbos' go big ONCE and be happy. better to spend the extra few hundered $

[rev210]

Yes very valid points.

I started from scratch with this car and made it look the way i wanted. I dont really want to have to sell or swap for another one with power and internal strength i desire.

280kw would be very much desired but nothing below 260. Ideally a 2835 pro s would have been perfect but there basically 4000grand now, 6 , months ago it was about 2600.

i have ecu and pump so all i would need would be injectors and z32 plus turbo setup.

I really dont no anymore i might just hold back and sit on it.

Nothing wrong with thinking about it

The good news is that by the looks you may have started from scratch but, you still aren't very far from it ecconomically speaking.

Something interesting to consider, believe it or not it will still cost you alot less to go buy a car with all the power fruit you could want (dare I say even an R33 GTR) and then transform it cosmetically into this car you have now if the look you have is somehow unique. By the time you are finished with getting the 280rwkw on this one (including all the necessary bits like an engine build /brakes/suspension etc.) you could have bought that very nice White HKS demo R33 GTR for sale and painted it black etc. We are maybe talking $40k over time but, there are plenty of punters around in GTST's who when totaling up bills that they will find they spent more than that and to end up with alot less. Remember power is addictive and more power means everything needs to be upgraded eventually.

It's the cheap way to get everything you want in the car 'including' the looks. Lets face it you haven't exactly fabricated anything on your car by hand have you? If not you can replicate the look on any R33 pretty easy and compared with the turbo spend, very cheaply too.

Nothing wrong with keeping the car you love but, ask yourself if it's just this car or is it the type of car?

Edited October 30, 2008 by rev210

[bubba]

OH such WISE words

[Pattygtst]

i am thinking cgc highflow tuned with supporting mods should be almost a third the price with could street performance minus the defect. I wouldnt need a loan too.

[R32 Driver]

for the price of a hi flow

wouldnt a low mount garret on stock manifold/dump be wiser?

and rev210 is very wise

80% of people on here wont do what your doing on there cars

coz we all know its money we wont get back, instead we encourage others to "go for it"

usually happens when you have mates edging you on even when your broke

[bubba]

Unless the hi-flow is second-hand and cheap cheap, then getting a brand new Garrett item (like internally gated GT30R) and mounting on the stock manifold would be a much smarter way to go.