As expected - now with comparison graph

Went to the rollers today. Went to a new one in the area, that a mate recommended.

http://s19.photobucket.com/albums/b176/h2ypr/?action=view¤t=tmp86.jpg

Quite what i expected. They didnt measure the fuelling because of my wideband.

What everyone think?

Ross

very nice !

nice early power there ross

comes in quite hard though by the looks of it, hows your clutch?

overall nice curves though

Mark

what do I think?

.........350bhp aint too far off

If you held the boost the same to the redline you would have the perfect graph

What ya mean?

Ross

that's torque, not boost

I presume you are tailing the boost off after 5500 - 6000rpm?

Oh yeah, blonde moment for me

erroneous 1500rpm readings as well...

more torque at 1500 rpm than at 2500 rpm.

OK i'm just bored now

Thats to do with him holding the car at 1500rpm, then releasing the rollers.

The boost tails from 1.3 to 1.2 between 5k to 6k.

Ross

what were you running midrange, 1.5?

No question, that is the best GT28R coupe this forum has ever seen. In fact I dare say that is the most driveable/powerful combination out there...10/10 Ross

Thanks dude!!

Now lets see if its any good on the 1/4 mile!!!

Ross

Well it was pretty bloody quick on that private motorway last week!

Made up for you mate.

Well done matey

Nice power Can u give me the spec of the engine?
The torque curve is going a little bit up and down between 3-4000 rpm. What EBC are you using?

I don't know the engine spec but I do know he's using a Greddy Profec B.

I dont know why it done that tbh. I would always argue that electronic boost controllers dont work the same on the rollers as they do on the road. I originally got mines setup on the rollers and when i used it on the road it was crap. Its a false load the rollers is putting on it. On the road the boost is flat.

Ross

maybe because the rollers are constantly tweaking the load every 3 miliseconds?

i agree, rollers are totally different to the road, you are probably running 150bhp on the road

come on ross give us the whole spec, I want to compare

The whole spec of what? My car? Nothing different from usual!!

Ooo, better update the hall of fame.

Ross

i think this is your spec

GT28R
full 3" exhaust
stage 2 TI head
Fully balanced engine
EVO FMIC
SIP
GTEC2 revised
Greddy EBC

that about right?

Are you running standard CR?

I wonder what suba's got to say about that

Its a stage 2/3 accoring to barbz.

Its not a gtech2 im running.

I dont know about the compression. I would doubt it due to the driveability off boost.

Ross

I shall clarify The best GT28R torque/power curve goes to Ross with amazing spool and powerband

Si does have a very very nice suspension/brake kit which will be fantastic on the track

http://www.fiat-coupe.info/images/rr_results/GT28R_coupe.gif

This is the same graph that flea produced last time, except it now shows my new figures. Would be interesting to see the latest graph for Suba and Sheikh's latest one aswell.

Ross

Now that is a proper torque graph

Why oh why do RR companies insist on using different scales for power and torque

yet again, we have a torque plot that crosses the power plot at the wrong rpm

It gives a slightly skewed picture of whats actually happening

Still an impressive graph for a GT28R - would be interesting to plot my graph over the top - I bet you're making 100bhp more than me at some points. If only you could hold your boost after 5,500rpm, but I guess if you could, you wouldn't be getting boost by 3,000rpm

EDIT - not quite - here's the comparative figures

Revs___Ross___Nigel
3k_____140____94
3.5k___160____141
4k_____225____206
4.5k___260____270
5k_____290____309
5.5k___320____355
6k_____330____387
6.5k___330____401
7k_____334____405
7.5k___boom___400

As I've said many times before, as well driven 300 - 330bhp Coupe will easily hold its own against a 400bhp Coupe, purely because of when and how the power is delivered. Its only on a track or a seriously open road that I would make any gains.

I'd be up for that!!

Also, what you think it does to the "picture" by the wrong switchover? I did notice that myself.

Ross

I could hold it, but for safety i wont hold more than 1.2 to 6k.

Ross

The main difference is that with the small turbo, you "only" have a 2,500 - 3,000 rev powerband. With a big turbo AND forged internals AND a raised rev limter, mine is about 3,500 - 4,000 (but I have to use 1,000 revs more than you to use it)

EDIT - no, actually, I take that back - you're still making good power at 6.5k, so your powerband is closer to 3,500rpm wide

Powerband? I dont understand based on those figures.

Ross

see my edit

Ah right. Sorry understand now.

Its a length of powerband, rather than point.

Ross

yup

If only i had the Torque of yours, plus my powerband!!

I think at the end of this year, i'll step up again!!

Ross

you're not that far off - I'm "only" running about 340 - 350 lb-ft

great work ross