sbd16v

no rich the point he is making is

you car IS faster than before so its NOT been a waste of money.

but if it does not make as much power as before does it really matter, the car IS faster, the only place it will be slower will be in your sig

CossieRich

iTrader: (1)

I see what you are saying but the point of this was to push my car over the 400bhp mark without lifting the head,so i will be annoyed to a certain extent

Mark Shead

Yes it does, I didnt have a problem with a stock RS500 running 2bar as soon as the turbo could make it with no capping,
The only engine I have had surge with was a ST with a UT T38 with a ported head and stock cams, This started to surge running over 2bar around 3.5krpm.

Mark

Rab

But why? It's just a number......... It could be wrong. The rollers might be out of whack. Any number of factors could make the rollers under read. As long as the car feels faster than it was before you spent the dosh....

Too many people spend the money to get a number. So they can have a sig with how much power in it. Waste of money unless you're out there enjoying the car.

scoooby slayer

iTrader: (4)

mine has absoluteley no surge and runs 22 psi to 4700, 25 psi to 5300 and 32 psi to 7800 on 14s. could of run more sooner but i wanted it reliable so asked for no surge at all.

did you have proper spec cams for the stock 500 at 2 bar ?

when i got it it was surgeing a bit but running 26 psi low down and it made 390 lbft.

CossieRich

iTrader: (1)

well yes but im not into number chasing. The t34 setup would have been between 370-380 as i was running the turbo and greys as hard as possible. The car cant feel faster without more power and i want to know what that power is. If that power is the same as what i ahd before then i dont have a faster car, i'm a dick head for thinking it feels quicker and i have wasted money. Everyone says you cant get over 400 without head work. Myself and Mark wanted to see if thats true or not.

Mark Shead

It was a bog standard RS500 with no mods to the engine and ran 2bar from about 4.5k which was where it would come on boost, No capping or reducing boost in any way and bringing it o as soon as the turbo would produce it.

Mark

Mike Rainbird

iTrader: (3)

I was of course referring to 10k running the GT30, but as you have run 7-8k on the T34 I will reduce that to an additional 5k of hard driving (including 5 track days) to be fair to TIB. Also, if I win, I'll donate the Ł10 straight to you Rich, as I wouldn't wan't to prosper from your misfortune .

Mark Shead

Its a pity the power wasnt measuerd with the T34.

Mark

CossieRich

iTrader: (1)

indeed it was. Deffo faster than it was though

Rab

But even if you do, someone will come on here and spend 20 or so minutes typing out a huge essay on why you're wrong.......

CossieRich

iTrader: (1)

good for them hope they spend an hour on an essay lol

Trotter

mark shead this totally stock rs500 at 2bar,did you have to alter cam timing at all and what power would it make?i ask because i have a stage one and am tempted to put on a t4 and bigger injectors but i fear surge through the ports being to small?

Mark Shead

Stock means stock, All it had was a 044 pump a breather system and a Autronic SM4 with 750cc injectors,
No engine spec changes were needed or made.

Mark

scoooby slayer

iTrader: (4)

i wonder why mine surged then ? higher lift cams than standard unless the rs500 inlet helped ?

Trotter

so are you saying my stock engine on level6 will be ok at t4 or was it down to the sm4?what was the estimated bhp?

Mark Shead

It was a stock RS500 that I have know for years and was stock, As I dont map the webber unit I cant say from experiance whether it will surge but on the Autronic map I did It did not,
there is no reason what so ever for the ecu to help so there is no reason why it will on a L6.

Mark

Mark Shead

It felt 400 to 420hp but I did not test it for power.

Mark

Trotter

hmmm t4,greys,3bar suitable chip and boostmark can you tell me when she spun up i would guess around 4200rpm?

Mark Shead

It was pretty much on full boost by then in 4th.

Mark

cossie4i+

iTrader: (15)

Any news on todays results ?????

Hope all went well

Steve.

Ollie MK5 Turbo

+1

carlo

iTrader: (4)

+2

sbd16v

+3

Chip

iTrader: (3)

Got a text off rich.

380bhp / 390lbft


Apparently he isnt amused (understandabley)


Havent asked him if Mark knows why the figures are lower than expected yet, as I would assume there must be a reason for it.

Let the pisstaking commence

Trotter

mark ahead what head gasket was that rs500 running?

KSA-Cossie

iTrader: (4)

Thought that spec would make a lot more than that.

Chip

iTrader: (3)

Im sure it will do at some point, there has to be an issue somewhere there I should think.
Although it could be that lowish comp and a standard head is meaning even with lots of ignition timing its not working the mixture hard enough at the top end.

Could also of course be anything from leaking head gasket (mike would love that, PMSL) to lifters that are worn, or any number of other things.

On the plus side, thats still not actually a shy figure for a cossie and its still in one piece and still going very well.


Im sure Mark can provide more info when he gets back.

KSA-Cossie

iTrader: (4)

Very true chip nice useable power for a road car.

Chip

iTrader: (3)

True, but rich still isnt happy, lol

FletchCossie

iTrader: (4)

I was spot on

Gutted as its running low tho

carlo

iTrader: (4)

Thats whats wrong he forgot to do a run with the 4 leads on
Im sure mark will get it sorted

rsnissan

iTrader: (9)

Shame............at least they are trying something new in this 20 year old game

sure they will have it sorted, gotta be a restriction/leak somewhere i would guess

cossiemanden

i did one in april, escos with std engine, 2wd exh manifold and bd12.
Its on light blue and std t34 @ 1,9bar, it max out the injectors, and it´s shit fast
Havent been on the rr yet tho but guessing 360-380

RS2.7

I wasn't too far out either with a 350bhp guess but Fletchcossie was spot on so well done mate . Don't ever be disapointed with 380bhp on the DD rollers as that is a great result and will go as fast as all the so-called 500bhp passionford cossies that only run on the "pub" dyno !

Chip

iTrader: (3)

you were as far out as someone saying 410bhp

And I suspect this wont be the final figure anyway

jb fletch

iTrader: (1)

Got the same txt & am shocked really !!

Goes a lot better on the road than a 380hp Cossie

jb

Mike Rainbird

iTrader: (3)

I personally think (as much as I don't want there to be), that there is a problem with the car. It should have pissed 400bhp.

Were the ACTs monitored, as in did Mark go with you and have the lap top plumbed in for the run to monitor everything?

It may have hit the charge air retard point and fucked off a load of ignition, as 2.5 bar is a huge ask of any intercooler with rolling road cooling?

Chip

iTrader: (3)

Very possible, and would explain why it seems to go well on the road.

RS2.7

Honestly there is soooooooooooo much bullshit bhp quoted down the pub that a TRUE dyno-dynamics 380bhp sounds crap BUT it's not . This is a great result and he will have soooooo much fun waisting everything and then telling them he beat their "500bhp" pub dyno cossie with his proper 380bhp one !