About finished my single turbo setup, what is the limit on stock cams and lines

I was original running BPU, then an unturned setup on T3 housing, at just 1.1bar.. so excited to finally have a proper single setup.

New setup includes:

S366 66mm turbo T4 .91 twin scroll, on twin scroll manifold, 40mm wastegate

SARD drop-in 800cc Injectors

Walbro 400lph fuel pump

HKS Ti Carbon exhaust + 3" midpipe and downpipe

ARC 2 row intercooler

AEM EMS V1 standalone

This is a 97 TT 6-speed (non-vvti).

It has stock fuel lines, and stock cams.

On pump fuel here, which is 94 Octane, I can safely run 1.4bar or so.

Typically with similar setups on stock lines and stock cams, guys around here make in the 500rwhp - 550rwhp range on pump gas easy.

A friend made 518rwhp at 1.25 bar, very similar setup.

Lets say with conversion, 600bhp is about 510rwhp (at 15% loss). Our dyno's calculate wheel hp here.

I am going in for tuning really soon. I am wondering what is the safe limit on the stock lines.

And how far can the stock cams be pushed? I believe these two things are the only things that will limit me.

My goal ideally around 520-550rwhp, so with the conversion, that's about 610-650bhp.

So hopefully I can reach it now, otherwise I am seeing what the next step is.

I also don't have a fuel pressure regular, is this worth getting?

Cheers!

I was original running BPU, then an unturned setup on T3 housing, at just 1.1bar.. so excited to finally have a proper single setup.

 

New setup includes:

S366 66mm turbo T4 .91 twin scroll, on twin scroll manifold, 40mm wastegate

SARD drop-in 800cc Injectors

Walbro 400lph fuel pump

HKS Ti Carbon exhaust + 3" midpipe and downpipe

ARC 2 row intercooler

AEM EMS V1 standalone

 

This is a 97 TT 6-speed (non-vvti).

It has stock fuel lines, and stock cams.

 

 

On pump fuel here, which is 94 Octane, I can safely run 1.4bar or so.

 

 

Typically with similar setups on stock lines and stock cams, guys around here make in the 500rwhp - 550rwhp range on pump gas easy.

A friend made 518rwhp at 1.25 bar, very similar setup.

Lets say with conversion, 600bhp is about 510rwhp (at 15% loss). Our dyno's calculate wheel hp here.

 

 

I am going in for tuning really soon. I am wondering what is the safe limit on the stock lines.

And how far can the stock cams be pushed? I believe these two things are the only things that will limit me.

 

My goal ideally around 520-550rwhp, so with the conversion, that's about 610-650bhp.

So hopefully I can reach it now, otherwise I am seeing what the next step is.

 

 

I also don't have a fuel pressure regular, is this worth getting?

 

 

Cheers!

Have to say I really don't believe in the whole wheel horse power + 15% rubbish.

But anyway, stock cams are fine, jcbt on here is running 650lb-ft and I believe 568bhp, but the car was spinning on the dyno, but the stock cams only limit that car at the top end, so will depend where you want to move your power band too really.

unfortunately can't help with any of the other questions.

Yep too bad all Dyno's cant just give the same reading!

But lets say we do this conversion, 85% of 650 is 552(rear wheel HP)

I have been reading around, and seems like others have been making power in this figure

Even if I can make about 610-620bhp I will be happy... getting up to 650 would be awesome, as that is my limit on this car.

Regarding fuel lines would be great to know! and if a fuel pressure regular would be beneficial, or if tuning should be enough.