D'oh!

See below

Not really Nobby.

http://www.turbobygarrett.com/turbobygarrett/tech_center/turbo_tech103.html

http://www.supramania.com/forums/showthread.php?t=45013

Helps to prevent surge. Of particular concern when running big turbo's like this one.

they have little "cuts" (naff way of explaining it) just before the comp wheel.

Basically a ported shroud helps eliminate compressor surge by porting the compressor inlet so that excess air can be diverted back to the inlet. It makes a huge difference on part throttle for my car.

I have mapped a couple of high boosting RSR turbos that boost too quickly in high gears i.e. more air than can be consumed by the engine at a particular rpm. Basically they have crossed the surge line where the turbo wants to give more so you get the air backing up and stalling the turbo. As long as it doesn't last too long then it won't damage the turbo.

Trappy, 510bhp??? Not sure about that but I can confirm it is faster

If you can carry that 379lbs/ft @ 5,800rpm another 1,200rpm, then you'll be at 500bhp @ 7,000rpm. Where is this turbo likely to make peak power? I'd assume higher than Matty's 6,500rpm as it's a bigger unit.

If torque does trail off dramatically over 6,000rpm then you're probably looking at a frankly pathetic 450bhp

Yee-haa where are all the datsun boys when you need them!

Great figures Leighton.

its quick but not going to really worry the datsun boys sorry.

great work though and stunning car

Depends on which Datsun boys Yet to come across one on track that is quicker but of course there will be some one day. Anyway, I'm quite happy keeping Ferraris, Lamborghinis, Corvettes, Porsche Turbos all honest... and that was with a little less oomph

Have you driven a R32 GTR??

I cant see any coupe out handling a R32 GTR TBH, mine will be back from spain soon, maybe we should put it to the test but i have over 600BHP, 4WD, 4 wheel steer and 9.5 inch wide tyres in each corner.....

To take out driver skill maybe we should take a lap in each others cars??

200sx is a different story though, much closer matched

Well I did say it depends on which Datsun. I have never seen a big power Skyline on track, they all appear to be too busy running up the dragstrip which is such a waste of a fantastic handling car.

Anyway, I would love to have a crack in your car, anything that well sorted is an exciting track opportunity.

Me too and i agree it depends on which Datsun boys and how many million bhp they have. Lets remember the coupe is only fwd and i have frightened a good few supposed well known cars with lots more bhp. What i do find interesting in the Time attack series is why a Skyline is not winning any of the classes?

well the car will be sorted soon so i will let you know ASAP

This is

Nah, it generally does what its supposed to do, which is shift some lardy bastard from A-B while wallowing around under its huge girth.

Although occasionally you will see one or two doing some track work:

Ringliner

to be honest it won't keep with 900bhp skylines but for what it is its a really stunning bit of kit and i would love to be taken out in it sometime.
if i am fair i ahve had quite a few skylines and with much more power than the coop and with full coilovers and track setup and although it was quicker than the coop i find the coop so much easier to drive fast and don't worry what it will do to me so if i had a choice or a very high powered skyline again or fleas car i would take fleas car!

A standard coupe is 1320KG and a R32 GTR is 1430KG, hardly lardy.

Standard brakes are shit on the R32 though

top work flea,,,cant wait to see the HP figures though

Peanuthead - there were several Skylines at TOTB this year that were slower round the handling circuit than my Coupe - its not all about power you know - several of them had about double what I'm running

CLASS A - FWD
1 A12 Nigel Ogram Fiat Coupe Turbo 52.907 (5th of 5)

CLASS B - RWD
1 B1 Duncan Cowper DAX Rush Turbo 47.703 (5th of 5)
2 B2 Stu Blackery Westfield Cosworth 48.531 (2nd of 2)
3 B39 Phil English Lotus 211 50.390 (1 of 1)
4 B42 Craig Dolby Lotus Elise Type R 50.531 (1 of 1)
5 B18 Daniel Lark Nissan 200 SX 50.891 (3rd of 3)
6 B39 Phil English Lotus 211 50.969 (5th of 5)
7 B42 Craig Dolby Lotus Elise Type R 51.015 (5th of 5)
8 B7 Jack Frost Holeshot Racing DAX 51.172 (4th of 5)
9 B33 Paul Norris Lotus Sunbeam 51.250 (5th of 5)
10 B34 Nick Hedley Ford Escort MKI Turbo 51.828 (4th of 4)
11 B3 Avi Morade KMS Mini Club Sport 52.125 (3rd of 3)
12 B14 Kevin Duckworth Nissan 200 SX 52.188 (2nd of 2)
13 B14 Kevin Duckworth Nissan 200 SX 52.250 (5th of 5)
14 B36 Richard Elliker Lotus Exige 52.562 (4th of 4)
15 B22 Chris Pearson Lotus Exige Type R 52.610 (3rd of 4)
16 B32 Lee Redgrave Ford Escort MKI Turbo 53.109 (5th of 5)
17 B38 Russ Treasure Lotus Exige 53.891 (5th of 5)
18 B40 Andy Kear Lotus Exigie GT 54.516 (3rd of 5)
19 B6 Nadine Geary Dodge Viper 54.547 (3rd of 5)
20 B18 Daniel Lark Nissan 200 SX 54.734 (3rd of 5)
21 B24 Nathan Freke Toyota MR2 55.109 (3rd of 4)
22 B37 Simon Walker Lotus Exige 55.890 (5th of 5)
23 B30 Stephen Ross Ford Granada Twin 55.969 (1 of 1)
24 B9 Westley Cox Supra 57.218 (3rd of 3)
25 B15 Steve Hawkes Nissan 200 SX 57.438 (2nd of 2)
26 B29 Robbie Calder Mazda RX7 V8 57.672 (2nd of 4)
27 B10 Michel Lane Supra 58.640 (2nd of 2)
28 B11 Jay Evans Supra 58.719 (2nd of 2)
29 B44 Lee Catermole Sierra RS Cosworth 58.750 (1 of 1)
30 B19 Larry Vallot Toyota MR2 69.812 (3rd of 3)

CLASS C - 4WD
1 C61 Gavin Renshaw Mitsubishi EVO 5 RS 47.797 (4th of 4)
2 C66 Olly Clarke RCM Subaru Impreza 48.484 (3rd of 5)
3 C65 John Stevenson Subaru Impreza 48.719 (5th of 5)
4 C60 Jason Hulbert Mitsubishi EVO 4 48.891 (1st of 2)
5 C55 Martyn Green Mitsubishi EVO 5 RS 48.906 (3rd of 3)
6 C59 Phillip Young Mitsubishi EVO 6 GSR 49.000 (1 of 1)
7 C61 Gavin Renshaw Mitsubishi EVO 5 RS 49.250 (5th of 5)
8 C57 Clive Seddon RC Developments EVO 49.391 (4th of 5)
9 C59 Phillip Young Mitsubishi EVO 6 GSR 49.406 (5th of 5)
10 C64 Paul Blamire ZEN Subaru Impreza 49.422 (5th of 5)
11 C62 Paul North Mitsubishi EVO 8 49.453 (1 of 1)
12 C60 Jason Hulbert Mitsubishi EVO 4 49.531 (4th of 5)
13 C56 Paul Martin Mitsubishi EVO 6 GSR 49.641 (4th of 5)
14 C62 Paul North Mitsubishi EVO 8 50.547 (5th of 5)
15 C72 Gulli Halldorsson Team Ice Subaru 50.828 (3rd of 4)
16 C69 Dale Howard Subaru Impreza 50.844 (4th of 4)
17 C53 Simon Norris Norris Designs EVO 50.937 (3rd of 3)
18 C69 Dale Howard Subaru Impreza 51.203 (5th of 5)
19 C58 Ian Smith Mitsubishi EVO 5 GSR 51.281 (4th of 4)
20 C79 Robbie Thornton TDP Skyline R32 GTR 51.312 (4th of 4)
21 C68 Kevin Horsley Scooby Clinic Impreza 51.500 (2nd of 2)
22 C56 Paul Martin Mitsubishi EVO 6 GSR 51.562 (1 of 1)
23 C54 Norman Murray Mitsubishi EVO 6 RSX 51.875 (2nd of 2)
24 C75 John Begley Nissan Skyline R32 52.062 (5th of 5)
25 C71 Rob Harriman Subaru impreza 52.141 (5th of 5)
26 C83 Richard Douglas Subaru Impreza 53.187 (3rd of 5)
27 C77 Neil Wrenn Nissan Skyline R32 54.296 (2nd of 2)
28 C84 Andrew Melling GTi-R 54.766 (4th of 5)
29 C70 Andy Napier AWD Subaru Impreza 55.031 (1st of 2)
30 C81 Barry Howieson Skyline R33 GTR V 55.265 (4th of 4)
31 C45 Renton Nissan Skyline R33 55.797 (2nd of 2)
32 C78 Pete Kettleboro Nissan Skyline R32 57.656 (1 of 1)
33 C80 Anthony Edmundson Nissan Skyline R33 58.063 (2nd of 3)
34 C89 Derek Milton Mitsubishi 3000 GT 58.359 (5th of 5)
35 C86 Chris Murty GTi-R 60.437 (2nd of 2)
36 C76 Karl Farrar Nissan Skyline R32 62.343 (1 of 1)
37 C52 Adrian Smith Fensport Celica 65.078 (1 of 1)

As Gunzi says below - I beat all but two of the Skylines, and I was less than a second behind John Begley's monster

I checked and it was 6 slower and 2 faster on that track

5 of the slower ones ran low 11 sec 1/4's.

It show's what a Coupe is capable of in the right hands (even with some 2nd hand suspension parts)

very true but totb isn't set up for skylines s its so tight and with it being mainly rwd they do better on larger tracks.

the thing is nigel i respect what you do with your coop it is a fine machine and you set great times but where are the other coops on that list? they don't really compete on the same level so either your a amazing driver or your car is far above the other coops?

to be fair the skylines are falling behind on to scoobys and evos and untill the new gtr is cheaper and played with this will remain the case.

i would love to build a coop that would be as quick as the skylines but doubt it will happen.

oh and all the skylines bar two went in setup for drag i know i helped pick them lol they knew we wouldn't do well so setup for what there good for.

there was only one other Coupe this year (Flea) and he was having a lot of problems on the day!

I don't think tight tracks really suit the coupe!

they have more instant grip than a skyline does thats why they are better.
the skyline is rwd and not that well setup for rwd untill the back breaks traction then sends power to the front so it goes very sideways then front pulls you out of it and capterpults you but you need room to do this and the rear can't be setup very well because of this so you need a more flowing track.

if you get the back out on a gtr just as the front kicks in and let off the gas you spin so you have to be brave and keep the foot to the floor.

no such drama in the coop just be gental on the gas so it doesn't break traction.

Guys, if you want to have a discussion about Skylines lets move it to a separate thread in 'other cars' can we please?

yeah fair play. i thought it was going abit off subject and ott. ask flea if he want that deleted as i don't mind my posts going off this thread

all hail king of the 2liter coupes (FLEA)
we're not worthy

GOOD WORK! why do these things always have to turn into a comparison with another car cant we just be happy with out cars we didnt choose them because there FWD we chose them because we like them! otherwise we would all drive pulsa GTIR's cheep and super fast with little mods.

Well I took it out for a few tweaks today, the roads were a bit dryer. As a result I managed to hook up 3rd gear for the first time... I'm grinning writing this, it's getting a little silly now even for me

Good stuff Leighton