What ever it makes as long as it's fast on the road it's all that matters really and the good torque figure will make it a very fast road car lol!
I bet it go's really well

 

Faggot

 

True enough Andy, let's face it, a genuine 400 bhp Sapph is a quick car and with that torque it'll be cracking

 

I would of expected a solid 425+ with that size turbo at 2 bar, from my very small understanding of turbo compressor maps exactly half way into the plot would be 42.5 lb/min or 425 hp.

gt3071 at 1.6 bar on 1900cc is making 420 hp on each bank of my gtr, so your compressor definitely has more to give if you want it, what size exhaust housing are you on ? do you have a dyno plot we can see ?

 

Yeah but isn't the 3076 a bigger one than the 3071 unc ?

 

Yes Kev, Richie's car made 480 + iirc on the 3071 with a pretty basic spec and again iirc Doug Stirling's Escos made over 510 with the same blower

 

I had a gt3076.82 running 2.6 bar to hit 500bhp

 

Cool power figures.Leave it as it is and it will stay reliable.

 

100% agree with this statement, the man talks sense.

Thanks.Lee.

 

Stick a T4 on it and get 500

Good torque figure though Matt I bet its a hoot on the road

Steve

 

 

Its fast enough for me…………….for now!

it pulls really well on the road

bollocks!!

 

Seeing you on the M4 reminded me of a film...

Driving Miss Dalsy

 

He don't need 400 he needs a priest lol

 

Why does it drop off power so harshly at 4k ?

 

Why do the runs end at at about 5700rpm? If was hitting the limiter the graph is bollocks as the rpm scale will be miles out.
The rev limiter on that sort of spec must be up over 7500rpm surely? Looks like the best part of the graph is missing if the rpm scale is right

 

I was going to say 500 bhp but 400?
I have a gt3076.82 on my cossie and made 513 bhp at 2.2 bar,

 

that's just what I was thinking ? am I right in thinking the dyno will read the correct torque regardless of rpm, but then when the torque is divided by 5252 and the multiplied by the rpm to get hp figure the lower the rpm reading is the lower it will show the hp to be ?

by my calculations assumeing it was actually being revved to 6800 rpm the true hp reading at the limiter would be 466 hp

 

Yup, sounds feasible,

That would be more like the expected power really,

Makes peak boost very early for a big old turbo too, I think the dyno graph is scaled all wrong personally,

I hope he didn't pay much for the runs as it only appears to show 3000 rpm of his engine range must of been half price

 

Good torque and makes decent power pretty quick, for the boost it's done alright

 

Tacho ratio is wrong as the tq is way over what that car should make.

Mark

 

So a pointless power run

 

Yup lol.

 

Lol It was run up to the top end of the rpm James I never bothered looking to much at the graph scaling just the figure ! This is a shame as Charlie normally has a good rep

 

it seems odd that the hp is a flatline from 4500 to 5800 rpm aswell ?

 

I wonder what he used for rpm? Was it roller speed? Or did he use a pick up off the coil/injector?

I can only imagine it was roller speed and just not set up properly,
This can happen by using the old crappy ford tacho to check rpm, or setting it while the car isn't loaded up,
I always try to use the data stream and pick the rpm up from the ecu, if I'm nit using ign/inj pick up,
check it at around 3.5-4k so the car is loaded up on the roller, then once a run has been completed, trim the rpm scale finely to match the rev limiter, before adding a stop speed to cut the run just before the limiter.

 

can we not use that torque figure then mark and just correct it with the proper rpm calc ? I thought incorrect rpm scaleing would only effect hp plot not torque ?

 

Yeh he used roller speed just connected the vacuum hose and obviously the probe

 

do you know what the actual rpm limit is jay ?

 

Oh well, I guess there will be a more accurate part two of this thread next weekend then

Guessing when the rpm scale is corrected it looks a tad lean at what will end up being around 4500rpm too

 

Well its all guess work from what matt was saying as the tacho isnt set right as said sheady had removed the limit and was revving it past 7k on the mapping session which is nothing out the ordinary revving it to that and hoping matt missheard the limiter bit

 

I'd be revving one of them up close to 7800 if it were mine, certainly over 7500.

The only time it would ever see a 5500rpm rev limit is in limp home

 

Exactly think my cut is 7600

 

So it was Ł40 well spent then lol!!

Limiter is at 7200 and was lifted while mapping iirc(its all a bit blurry due to me being a pussy), the only time it will ever see that is either mapping or or if it gets nicked lol I've got far too much mechanical sympathy lol!!

Either way is a quick-ish car and I'm not running components to its limit! so it should last for ever lol

 

I may be wrong but my understanding is your 360 lbft figure at 5800 rpm should still be correct so if we assume that was actually 7200 rpm, so 360 lbft / 5252 then x rpm 7200 = 493 hp

I said 482 do I get the boost bar lmao

 

No you can't use tq as the dd dyno doesn't work that way. It does hp then calcs back tq.

Mark

 

So what do you think its done

 

oh, so it really did only make 400 hp then and a lot less torque than shown.

its about 400/400 then roughly aint it mark if I can calc it back the other way and apply 1400 rpm correction upscale.

 

Matt get it up to MSD James can then thrash the tits off it and you can get a true figure.

I might be a idea to go to the beach and not to watch tho at least you can run yours on the dyno my clutch slips on mine in 4th and 5th

 

My guess is hp correct but tq is under 420ftlb