Chip

iTrader: (3)

Stav, it was revving up quickly through the rev range and making boost as it went, Id say in fact that on most of the runs the revs were going up QUICKER than they would in 4th or 5th gear.

But yes for held figures, that is of course true, you can give the turbo ages to spool, which would only happen on a hill in a high gear normally.

The thing they seemed to have missed somewhat though, is that if you are in a high gear and off boost, the revs wont rise anyway, as its got not torque till its on boost, lol


So basically IMHO their points are potentially very valid, but in this instance the dyno wasnt holding back, particularly on the run where we did the power curve, the whole run took only a few seconds.

Martin-Hadland

iTrader: (2)

Stav, Paul is spot on you can produce good figures like that. I was going to make the observation myself but didn't want to start tuna wars!!

Stavros

I've no clue about all this stuff, but prob good for Mark to go on there and clarify it.

Depends how it is set really. Thats how transbrakes work on race autoboxes. Engages 1st and reverse at the same time, welly to the floor, hold it long enough (ive seen cars take 30secs to spool up sitting on the transbrake at low rpm, but they do in the end! ) and anything spools up from anywhere pretty much.
Obv that only works from a standstill, but the principle potentially the same is the same.

Few transbrake videos for you Euan (i had some awesome Supra ones, but cant find the good ones now)
http://www.youtube.com/watch?v=lB2qsj4Tzm0
http://www.youtube.com/watch?v=9mdTcRuJpuk
http://www.youtube.com/watch?v=nnppPlVw-sI
http://www.youtube.com/watch?v=AoV4gKt6z24
(The third one is a good example of it can take AGES, but gets there in the end. 30sec or so in that vid, as no nitrous and the transbrake holding the revs too low to spool fast without the gas on)

Doby

stavros,why did you say comp ratio in the 7's?Its 8.4-1!

infact everyone thinks its 7-1!!

Chip

iTrader: (3)

This thread on the GTR forum was the previous engine, which was 7.9, Mark upped the CR when they went back this time.

Chip

iTrader: (3)

You can, they didnt, lol

If I go along for the next one, I'll video it and post the video up here

stevieturbo

I do not use nitrous, never have.

brad

steve , have you got a spec on your latest build ?
last thing i saw on the granada forum was it was stripped down for a rebuild with something or other !!

Chip

iTrader: (3)

you should try it mate, its fucking awesome, you'd have won the Kilo at TOTB if you used it I reckon!

stevieturbo

Its all easy to say that.

You cant take pressurised cylinders across on the ferry, so there is an immediate hassle.

Getting gas here is also another difficulty.....I know of one place that offers it....I wouldnt buy from them though.

And then there is the risk of solenoids failing....intake explosions, and various other common problems associated with it.
You cant say they arent common, as Ive seen more than a few manifolds blown apart from it on other peoples cars.

Then you also have to consider.....a bottle with a decent sized shot doesnt last very long.

So as far as I see it, it simply isnt worth it. As I mentioned earlier, I'm not racing anyone other than myself. So I dont particularly care if I dont win TOTB, I dont enter any real competitive racing, as it simply isnt feasable for me to take part given distance and cost involved.

My car is purely for my own enjoyment.....I want it to go faster, but I dont want to rely on a small temporary bottle for that.
I want any power that I have, available any time I want it.


Almost every time I drive it, I learn that there are many areas where there is room for improvement....so I'll continue to work on those.

Chip

iTrader: (3)

Fair play mate

Steven_RW

It only made a "small" difference in this situations. Foot on brake at about 3000 rpm - make about 5psi, lift braking foot and the car makes full boost slightly sooner. Nothing that could be called cheating...

RW

Steven_RW

Yo matey - I forget what actual engine is in your car? It seems to go rather well!

Cheers

RW

Chip

iTrader: (3)

Its a vauxhall monaro engine, well same as.

Very cool engines

Porkie

iTrader: (1)

I can think of more glamorous links for the engine!

Chip

iTrader: (3)

More glamourous than vauxhall?

Surely not!


I was just naming the most common car stevenrw is likely to come into contact with in this country with the engine, I doubt he sees many corvettes, lol

sbd16v

and seeing as the firing order is the different from the corvette then its deff a vauxhall engine

iirc or cause

lead_foot

iTrader: (1)

Arn't all LS* 1-8-7-2-6-5-4-3 and older V8s are 1-8-4-3-6-5-7-2?

Chip

iTrader: (3)

Are you two going to start having a nerd-off?

sbd16v

when i was in australia i was chatting to a bloke about the ls series

and he was telling me that holden changed the firing order of the corvette engine to make it run smoother and give better emmisions ( not sure how it would change emmisions thou lol )

lead_foot

iTrader: (1)

Just found:

http://www.pistonheads.com/gassing/t...66&h=&t=214416

volcomstone411

i am an absolute noob, so feel free to ignore me...

but arnt wrc cars an engines far more restricted than the engine in question?

And millingtons only usually produce about 300hp, and some more torques, so i think the engine in question is slightly outside the limits of what others have done?

Chip

iTrader: (3)

You are correct about WRC engines, although despite their low outputs they still run massive cylinder pressures that strain the gasket, due to a combination of:
high comp
big midrange boost
massive amounts of timing
very det resitant fuel


so they are still quite relevant in many ways.

Mark Shead

Its all well and good saying go to 4k and not a lot would happen for quite a while most likely not but FUCK either wait till 4.4k or drop a gear and this like a sledge hammer,
Experts got to love them a power run at 4.4k on the dyno will only take a couple of seconds to biuld the boost then nearly 600ftlb or so this would be the same as flooring it at 4.4k in 4th and waiting for the boost to biuld again this will only take a couple of seconds and guess what 600ftlb happens,
Try in 3rd yes it will take a couple of seconds to boost and wont reach full boost due to load for another couple of hundred but guess what 5k over 600ftlb happens,
Try the same in second and guess what it prob wont come on boost till 6k guess what yes again nearly 600ftlb,
So take a look at the graph use the gears correctly and you have access to 600ftlb when ever you want,
Stav not digging at you only the observers at may not be making the correct statements,
This is no 300hp T3 engine and wont have the responce lower down but Fuck will it go if you use the revs,
What other havent noticed this is a true split pulse diveded housing turbo when you drive a Twin scroll you never go back.

Mark

Mark Shead

Ha Ha a so called expert take a look at my reply this is no T3 engine and yours is no better,
I think no need for your reply do I come on your threads and make replies maybe I should start.

Mark

dumped

If you are not going to measure stable "brake" horse power on the dyno what are you going to measure.... "slightly braked more like in a car in 2nd gear" hp ? or what?

Mark Shead

You can run a 300 or 600rpm per sec load program, Then at what rpm do you start it 2k 3k 4k because each rpm with have a diff transisonal responce i.e time to boost this will be better at 4k than 2k due to the shaft speed of the turbo, and then how long do hold the inital load before you let the program run.

Mark

Martin-Hadland

iTrader: (2)

At what point in my reply to Stav did I say you had loaded it up? I don't fully understand when you say mine is no better, what does that mean... No better than what?

You are entitled to make comments on my threads (it's a public board), btw this thread isn't yours it was started by Dave!

Wrong time of the month Mark?

carlo

iTrader: (4)

dave who ?

Luca

iTrader: (2)

Well Carlo,

Once upon a time there was a lovely Blue Escos..................

carlo

iTrader: (4)

Chip

iTrader: (3)

Delicious, sounds yummy

Mark Shead

Wait till someone makes a comment then you can add a replynice work try to make a comment without accualy having to say it then adding on to someone else comment,
Maybe you should have said this before someone else did Oh sorry that would be tuna wars,
Maybe I will do the indirect comments ,
I think my reply on the stav bit jsut about puts the correct point across.

Mark

dumped

So is anything apples for apples as one superflow used by one person may still give different readings to one used by another. And the letters TUV mean nothing to me before mike starts lol!!!!!!

For an interesting point when you are next on the dyno (if you have not already done this) could you log an engine at static points like you do when mapping and then take a few logs with the different variables/ramp rates like above when doing power runs - all on the same map/settings/engine temps. I would really like to see the differences to see if they are significant or not, purely out of curiosity.

Would be nice to see the graphs back to back.

Chip

iTrader: (3)

If its at points where on his power runs it makes the required boost pressure, then it will not be any different anyway, its only when you gain boost that it makes any difference really.

dumped

fair point as if the boost is there so must be the load? Unlike when rollers are slagged for not offering enough to see the boost people are experiencing on the road.

Still interested, I like graphs lol

mk3cosworth

sorry pal i thought you did, fook me when you do your mods and every did fit nos it would be sumit else lol

SillyFezzaMk1

iTrader: (1)

Stavros that is the most mental launch i've ever seen!

Dan

Jim Galbally

FUCKINGHELL @ launch!!!!

Stavros

Aye, shit like that almost made me get a race autobox just for the fun and games you can have with the transbrake!