Most power seen on stock/99 twins?

Brett · August 07, 2012, 04:08:15 PM

All interesting stuff - I see a lot of people choosing small/mid sized singles and not running significantly different figures. I guess the change over is usually related to simplification and reliability.

BlitzBoy · August 07, 2012, 05:18:51 PM

Brett most people on stock twins only see roughly 330bhp at the fly with stock twins and stock ports, someone with even a T04E can reliably beat that.
A Street ported engine with stock twins at sensiable boost will make 360 fly. Someone with a T04E will make 400 fly reliably on street port.

400 at the fly for stock twins everything has to be spot on and not kill the turbos too quickly

Mir · August 07, 2012, 05:44:28 PM

Quote from: Timmy;831840Recently? The same car that also made 385ft/lbs of torque?

It was not recently. I think it was his own silver FD.

Timmy · August 07, 2012, 05:52:15 PM

Didn\'t realise the silver one was that powerfull, when i went in it the power delivery was really linear very nice drive.
He mapped mine at the weekend which was just short of 400bhp on sequentials but the car apparently has quite a bit more to give.

I don\'t know why people "upgrade" to small singles as alot of people don\'t seem to make huge gains over the twins.

Mir · August 07, 2012, 05:56:52 PM

Quote from: Timmy;831970Didn\'t realise the silver one was that powerfull, when i went in it the power delivery was really linear very nice drive.
He mapped mine at the weekend which was just short of 400bhp on sequentials but the car apparently has quite a bit more to give.

I don\'t know why people "upgrade" to small singles as alot of people don\'t seem to make huge gains over the twins.

The Silver one is going to put up a great show this time round at the Santa Pod:)

wolfie1 · August 07, 2012, 08:35:52 PM

i have a power fc, 1680 secondry injectors, arc standard mount intercooler, an aluminium race radiator and a vented bonnet and headlight cover amongst other things and am running at 0.95 bar of boost, could it safely run at 1.1 bar, i take it the fueling would have to be turned up too, what kind of afr am i needing to have?

BlitzBoy · August 08, 2012, 11:28:06 AM

Quote from: Mir;831971The Silver one is going to put up a great show this time round at the Santa Pod:)

Is he going to put it on the strip? it should do mid 12s with that power if its near 400 fly

HaywardRotary · August 08, 2012, 11:39:50 AM

The real issue with stock twins on and FD is they do not last if boost is turned up much over 1bar.
As for aftermarket turbos, ie single big turbos you can run hi boost but you do need to have thr right ancillaries in place and good fuel depending on boost level and mods.

Mir · August 08, 2012, 11:59:40 AM

Quote from: BlitzBoy;832109Is he going to put it on the strip? it should do mid 12s with that power if its near 400 fly

AFAIK, it will be going up the strip, but it no longer have twins or stock ported engine:eek::King. Last time I spoke with him, he said, He is preparing his car for some fun. So, if all goes well, we would have another powereful FD on the strip lolll

Mir

m1tch · August 08, 2012, 12:50:23 PM

Quote from: HaywardRotary;832113The real issue with stock twins on and FD is they do not last if boost is turned up much over 1bar.
As for aftermarket turbos, ie single big turbos you can run hi boost but you do need to have thr right ancillaries in place and good fuel depending on boost level and mods.

Sounds like the same as the FC turbos then as they run out of puff at about 1bar and begin to shorten its life expectancy if you push them any further.

Timmy · August 08, 2012, 02:53:16 PM

What goes wrong when you go over a 1bar not that i\'m planning to but can\'t really see why it would cause a failure of the turbo. I always thought going over 1bar just put you out of the turbo\'s efficientcy.

Brett · August 08, 2012, 02:58:04 PM

I\'d imagine that its because you\'re working the turbo out of its design range; more rpm on the shaft, more strain & more heat. (At a guess)

Is yours the white FD at Jason\'s?

Grant Monkhouse · August 08, 2012, 03:34:27 PM

I do believe the start getting very very hot over that threshold. Saying that mine peaked at 1.1 bar and I ran it at the that for 2 years. Started smoking a bit but I rekon if I had a new set I could have upped them more, and a nice bit of WI would have been great.

BlitzBoy · August 08, 2012, 03:38:57 PM

Quote from: Timmy;832150What goes wrong when you go over a 1bar not that i\'m planning to but can\'t really see why it would cause a failure of the turbo. I always thought going over 1bar just put you out of the turbo\'s efficientcy.

Its the small shafts of the stock twin turbo wheels when you overspeed them that much to produce that high boost level of 1.1-1.2 bar the bush bearings dont last to long, the edges of the blades start to hit the housings as well as the bearings go, so it looks like mice have started to eat your blades.

HaywardRotary · August 09, 2012, 09:54:35 AM

The issue that the twins have that are making at over 1 bar boost is the oil that lubricates them to gets too hot from the turbine wheel getting much hotter and then the oil is no longer able to protect the bearings in the same way that it can at lower boost levels.