Turbo Rebuilds

[LotusGTR]

http://www.atpturbo.com.au/ATP_Turbo_Repairs/index.html

I've got a new (old) R32 GTR coming my way which is pretty much stock standard. She'll only ever be a streeter and I'm not looking for big horsepower. I guess I'm wondering what my turbo options are. I really don't want to sink a fortune into it (like the other damn one), but am concerned if I leave the std turbs in place they'll let go one day and possibly take the eingine too. I'd like to maintain the feel of the originals, perhaps lean on them a little harder and make a little more mumbo, but that's about it....

I've sussed out a new / second hand pair of -7s, or I could rebuild the oldies, and possibly hi-flow too.

Be interested to hear your thoughts on the various options and where to get good quality work done.

Thanks.

[Angus Smart]

-7's ftw (if they are the smaller of the lot)

[locoloc]

if the dash -7s are the ones that kip from ATP are selling id probably get those...

They have only seen dyno time and the owner wanted more power and i think upgraded to -5s..

He offered me this pair a couple of weeks back but i had just installed a pair 2 days earlier.

Im not sure what it costs to rebuild the stockies but i cant see it being that much cheaper than getting the used -7s..

[MrStabby]

If its going to be a streeter with <270-280kw (so you wont need injectors or AFMs) then you might as well just get steel wheels in the stockers, which is around 700-800 each IIRC. I've got highflows in mine which i bought off an SAUer, the receipt showed he spent $1800. I did the dumps at the same time and havent retuned or upped the boost yet, but they seem to start to spool at the same time as the stockers (~2000rpm), but they spool more slowly.

[LotusGTR]

If its going to be a streeter with <270-280kw (so you wont need injectors or AFMs) then you might as well just get steel wheels in the stockers, which is around 700-800 each IIRC. I've got highflows in mine which i bought off an SAUer, the receipt showed he spent $1800. I did the dumps at the same time and havent retuned or upped the boost yet, but they seem to start to spool at the same time as the stockers (~2000rpm), but they spool more slowly.

At this stage (and I do change my mind) I tend to agree with you re steel wheels in the stockers. I'm assuming the hiflow part means they spool up more slowly. I'm also assuming the steel wheels with no hiflow spool more slowly than the ceramics? Does that mean you really want to run more boost when going to the steelies?

I'm guessing there's no reliable way of replicating the feel of the ceramic turbs, so once they're gone the repsonse will always be a little slower?

I don't want to lean on the engine too hard or want fuel economy to drop to pitiful levels, so just the guarantee they don't pop and get a little more.

[R31Nismoid]

Ye, steel wheel in the stockers if all you want is 270-280.

Response will be as good as stock.

[LotusGTR]

Ye, steel wheel in the stockers if all you want is 270-280.

Response will be as good as stock.

Does one use sleeve or ball bearings when this is done? What is the standard set up?

[MrStabby]

Does one use sleeve or ball bearings when this is done? What is the standard set up?

Sleeve and sleeve. If you do ball bearings it will cost the same as new garretts.

The highflow means there's less turbine wheel so less exhaust restriction, and yes slower spool. I was expecting spool to start later, but it started at the same rpm as stock, just ramped up more slowly. YMMV

[R31Nismoid]

Ye if you want a "cheap" replacement just for reliability's sake, then i'd choose sleeve.

There is a difference between them and the ball bearing, but hey, if you aren't chasing ultimate power/response then it's of little worry.

If you went ball - as stated, you'd just buy of the shelf Garrett's as it'll work out the same price, then sell the stock turbos off.

[Rekin]

I used RotoMaster http://www.rotomaster.com.au/

They rebuilt my hks2530

Cost me $800 for new ball bearings and seals.

Much cheaper than anyone else, because they are exclusive Garrett distributor and can source separate parts instead of the whole chra

Give them a call

[LotusGTR]

So let's say I can get the std items rebuilt for around $1,200 and some good quality second hand -7 Garretts for $500 more, are they worth the extra? I guess the labour investment is high so need to make the right decision re parts. Once again I'm not going to boost the hell out of these things as its an older engine and for the street. The -7s are larger than std so I'm wondering if they might actually be a backward step (even though they're ball bearing) considering response and the relatively low boost.

Thoughts?

[LotusGTR]

So I bought the -7s.......What will happen if I just bolt them on. No other supporting mods other than the (dubious) exhaust I'm running?

[R31Nismoid]

Nothing, just dont increase the boost too much.

I was running 1bar on the stock ECU without a issue with GT-SS's, made around 260rwkw.

[LotusGTR]

Nothing, just dont increase the boost too much.

I was running 1bar on the stock ECU without a issue with GT-SS's, made around 260rwkw.

So by nothing, you man nothing bad? Just strap them on, set the boost to around 1 bar and get circa 260 rwkw? Is that what you mean? Thanks Ash.

[R31Nismoid]

Yep