Quick Ranger

iTrader: (2)

I think I have it narrowed down to these two turbos for my build. It will be a 5.3 with a glide trans. Unsure of gearing yet. The main goal is for a nice street cruiser, running around 10-12 psi, pushing up to 20-22 at the track.
​​​​​​​What are the thoughts of the turbo gurus here?

slowlsx

iTrader: (28)

Have you seen vsracing new billet 7575? Might want to check it out.

But between the two I think the 7875 might be a little better and capable of more piwer

ddnspider

iTrader: (26)

My 7875 lasted maybe 3k miles before the seals let go and half of those miles were just cruising. I wouldn't buy again.

truckdoug

iTrader: (25)

which gt45? the std 69mm compressor appears runs out of flow at around 625whp which is plenty for me. at 5 psi it boils tire in any gear

Quick Ranger

iTrader: (2)

I was looking at the standard GT45 on the site, 69mm. I wasn't aware that VS Racing carried any other versions.

truckdoug

iTrader: (25)

neither did I until I went looking to upgrade mine. he's got a bunch of them. give him a call or email.

another thing to keep in mind is the 69mm gt45 is it's own animal. it differs quite a bit from the other gt45s in that it's 4-3/8th exducer outlet is unique, as well as the way the chra is attached to the turbine & compressor covers. nothing is swappable between it and other gt45s.

its a great piece for the money though. i mean it's $300 and makes more power than most street cars could ever use.

121

iTrader: (4)

Was that with a oil restrictor? And the billet wheel version or cast wheel?
Just curious because I've been thinking about the billet version they just came out with.

Nitroused383

iTrader: (10)

The 77/83 looks like a good one to me but I haven't seen any results posted yet.

ddnspider

iTrader: (26)

With the same oil restrictor I ran on a Precison T76GTS for YEARS without issue. Cast version.

Quick Ranger

iTrader: (2)

Was that VS Racing version of the 7875?

ddnspider

iTrader: (26)

I sold the precision and ended up going turbo again and the vs racing 7875 looked close enough at a glacne so I bought it and ran the same restrictor.

SLOW SEDAN

iTrader: (13)

I've used the On3 88/83 and 78/75, Precision 7675, and Borg S480, none of them needed an oil restrictor. -4 feed, -10 drain never an issue.

Forcefed86

iTrader: (4)

GT45 will run out of steam, doubt you'd get to 22lbs with a healthy 5.3.

Quick Ranger

iTrader: (2)

Looks like I'm going to go with the 7875, looks like the best match for me.

BT802

iTrader: (1)

I was really close to going with the billet 7875 but I really want to make 800+ and I think it'll run out of steam just under 800. Thinking about his 8883 now, has to be T4 is my biggest issue.

M_Minnick

iTrader: (1)

Viren has stated the new billet 7875 will be good to 900-950 to the tire. It flows around 18% more than the cast version.

Rise of the Phoenix

iTrader: (27)

Here is what Viren sent me when I asked about the new billet 78/75 unit:


"wait about 2 weeks and get our new 7875 billet with the 11 blade unit. the
77/83 is nice turbo but the wheel on the compressor side can only support around 900 fly"

SLOW SEDAN

iTrader: (13)

So they are claiming magic that the billet 7875 will outflow the PTE7675 with same size turbine? Personally I don't see 900 anything to the tire happening with a 75mm turbine unless its a manual car on a unicorn dyno.

Rise of the Phoenix

iTrader: (27)

900 fly wheel, not to the tire.

SLOW SEDAN

iTrader: (13)

Not what was stated below: