Ah I see.

We could really do with some way of reducing charge temps via the AC, could maybe work or just get to the drag strip first thing at front of queue an hour before it opens, let car cool, then just run it and in theory you will get a run without spark retard or cat protection.

Is 11.39 your PB?

I ran an 11.3080@125.49mph this weekend in quite hot weather but the car had an hour to cool before doing the first run so car felt strong.

Second run was an 11.33@126mph and then as track temperatures when 30c and above with the car hot, it was back in the 11.4's.

Out of curiosity have you tried wet/snow mode for your drag runs? I am finding this mode consistently the fastest and as you have an AWD model you may wish to try it.

Also as your AWD more tyre pressure within reason is preferable, not less, certainly do not lower your pressures.

At Vmax I was running 45psi rear, 50psi front in the damp, using wet mode and the car hooked up brilliant every time, I ran such high pressures at Vmax as it was 1 mile racing so I was hitting 190mph and the manual advice to run higher pressures for over 175mph.

Its good to see you made a gain with your tune, what I would ask, this gain your tune/pulley gave, how does the car feel for comparison say when you floor it in 4th from a roll with the tune compared to stock?

I am temped to tune my SVR but am a little concerned I may not gain much if anything as it seems to be running quite strong as it is.

 

 

Very true, different tracks, air quality impact time.

All my runs are at Santa Pod which is pretty much the only drag strip remaining in the UK, its a great smooth surface and is 2 degrees uphill, so its quite a true track not been downhill like some.

What you can compare though I'd say is 60FT times, my best so far is 1.75s and the car in wet mode is consistently under 1.80s, in dynamic it tends to be around 1.85s with suspension on soft, put it on hard and its around 1.90s.

I run Michelin PS4S and so far they grip great, even with upto 45psi in them, so I think your tyres will help a lot. If your still spinning up with new tyres and in wet mode speak to your tuner to maybe limit boost in 1st gear.

 

 

I'd love to see what a fully tuned/pulley'd V8 could do with slicks. Not a fair comparison to be sure, but it would be fun.

 

 

My SVR with just a tune dead-hooked at the track on PS4s, so more grip will not help. It can be argued that less grip may actually make the car quicker.

 

What times / terminals have you run in your SVR mate?

 

11.5 @ 121 MPH stock and 11.4 @ 123 MPH with the VAP tune, both trips with the car properly heat-soaked as I wasn't aware of how significantly these cars were effected by heat at the time. I've since added VAP catted downpipes so I'll go again before the weather gets warmer. That plus better air and not letting the car idle for 10 minutes in the staging lanes will likely be worth another few tenths and MPH or two.

For what it's worth, the car is about dead even with a friend's 2016 Turbo S PDK from 60-140 MPH.

 

Seems hardly no improvement over stock and with the tune, I'd be rather disappointed with just a tenth and couple of mph.

Did you do pulley too?

But 60-140 sounds like that improved a lot, so noticeable stronger in roll on acceleration would you say?

Got two friends, both with Stage 4 R35 GTR's one on octane 93 and the other on race fuel. 93 one was running 11.49@128mph on Saturday against my PB of 11.3080@125mph and my mates on race fuel ran an 11.22@127mph for comparison. The octane 93 dyno at 660HP and the race fuel one ran 676HP on dyno on same day my SVR made 609HP on same dyno.

They are shocked how fast my SVR is and equally shocked how good it is off the line considering they are tuned, both are on michelin tyres like me.

 

Not disappointed by the results. There's less upside with just a tune on an SVR as opposed to a V8S or R since they're all using the same hardware, so I never expected anything dramatic and this is on 91-octane. The difference can be felt more so on the top-end where it matters, and roughly the same difference was felt after adding the downpipes.

I don't plan on adding a pulley for now, but if I decide to, I'll add the Eventuri intake while everything is apart.

 

Sounds good, by downpipes do you mean the vap 200 cel high flow cats?

 

Yep.