wanted yr dyno sheets

[eyefi]

heres an interesting (and depressing) comparison.

 

the graph is crank hp/trq

 

http://www.bigwig.net/fi-design/dyno-me-vs-stock.gif

 

i need to see some other cars dyno sheets and mod list, to compare to stock. any volunteers? there must be loads out there.

 

email me yr scanned sheets and ill make a comparison graph. ill post the results in here (unless someone wants theres kept private).

 

does anyone think this is an invalid test? is the stock graph an engine out dyno graph? its taken from the ncf 93.

 

ta

 

(Edited by eyefi at 3:13 pm on April 12, 2002)

[MONKEYmark]

hi eyefi

i would like to see how different supras compare,would be good to see peoples mods they have done too.intresting reading.

how did they do your auto on the rollers at well lane.

also you could ask mr boost  he has posted his chart on his site.he was on the granada men and motors tv shoot out he got 326bhp i think.ask him see what he says.

 

would be good to see a stock j-spec and a j-spec with cat back exhaust and no cats to see how much power and torque has changed.

mine feels faster on road since when i first got car.how much was the rolling road session and how many runs did they do.

would be good to have a rolling road shootout with some supras.maybe get tv or mags involved.

 

keep us informed

[Guest Martin F]

Here is my dyno sheet, unfortunately no torque curve. If you want to see a list of the mods then check out member 10.

 

http://www.indidist.co.uk/images/images/martinf5.jpg

 

(Edited by Martin F at 5:12 pm on April 12, 2002)

[Rich J]

http://members.tripod.com/derestricted/supra/stats/TT_Auto_Dyno.jpg

Phil Reed's Standard J-spec Supra TT Auto, at wheels BHP figures.

 

(Edited by HardHead42 at 8:50 pm on April 12, 2002)

[Rich J]

What mods have you got eyefi, if it's just the exhaust I would be suprised if it would make much difference to stock with both cats in. Your at wheel figures look more "normal" the at engine figures look all messed up IMO.

 

(Edited by HardHead42 at 8:53 pm on April 12, 2002)

[eyefi]

richard, yes the only mods (that i am aware of) is the exhaust.

 

come on u lot i know theres more than 2 dyno sheets out there

let me see those torque graphs.

[Rich J]

I am presuming () that Martin Fs car is running non standard boost which is making much bigger power on the second turbo, Martin I have some info that can get you roud some of that while still keeping the pre-spool on turbo 2 http://members.tripod.com/derestricted/supra/mysupra/bleedert.htm I even have the said device in my garage somewhere if you want to try it.

 

(Edited by HardHead42 at 7:12 pm on April 14, 2002)

[Guest Martin F]

Yep at the time i have a feeling my boost could have been free-running :o

 

Unfortunately i didn't have a boost gauge at the time but do now.

 

Although i'm happy with the way things are now, your idea looks quite intriguing. Without looking up all the piping diagrams i would guess that your 'bleeder T' is having the effect of upping the boost on the first turbo in a similar fashion to the way a std bleedvalve does on the second turbo's wastegate.

 

If so i would love to give it a go. LMK

 

 

 

(Edited by Martin F at 9:18 pm on April 14, 2002)

[Rich J]

Quote: from Martin F on 9:17 pm on April 14, 2002[br]Yep at the time i have a feeling my boost could have been free-running :o

 

Unfortunately i didn't have a boost gauge at the time but do now.

 

Although i'm happy with the way things are now, your idea looks quite intriguing. Without looking up all the piping diagrams i would guess that your 'bleeder T' is having the effect of upping the boost on the first turbo in a similar fashion to the way a std bleedvalve does on the second turbo's wastegate.

 

If so i would love to give it a go. LMK

 

 

 

(Edited by Martin F at 9:18 pm on April 14, 2002)

 

That's exactly right, basically on standard boost controller setups the pre-spool circuit stops you getting any more than standard boost on the first turbo. By adding the simple tee, and valve into the hoses you stop the pre-spool circuit coming in until your higher set boost (by way of the valve), you get more boost on turbo 1 and less of a drastic transition when turbo 2 comes on line. Of cause you can't make as much boost on turbo 1 as you have set on turbo 2 using this method because otherwise you would never get pre-spool :o. I ran all three methods (standard pre-spool, no pre-spool and "adjusted" pre-spool) and found the later to be the best IMO.

[Gareth Davies]

Bleedin heck (pun intended), took your time to tell us about that one... So where would you usally get the said device?

 

And why have I not seen one before?

[Alex]

Do you have anymore pictures of the install???

 

I can get the Bleed "H" made no problem...really interested in this mod...can't believe we didn't know about it.

 

Are there any negative side effects?

[Guest Martin F]

 

Probably only negative is life expectency of the 1st turbo in a similar way to how a bleeder or EBC upping the boost on the 2nd turbo would decrease life expectency of the second one.

[Alex]

So I'll blow both of them up.....I see no floors in this plan!

 

Must check if they are steel internals.....

[Rich J]

    Do you have anymore pictures of the install?

 

Nope that's all I took of it, very easy really, you just replace two pieces of tubing already there with the bypass and tubing, you can even just use a bit of tubing between the bleed and the tee so you dont have to do any fabrication and see if you like the effect. You then adjust the valve, you can never get more boost than you have set on turbo no 2 because if you set it higher then the boost is controlled by the wastegate on turbo 2/ and boost controller, but if you do set it higher then you loose all pre-spool. If you dont like the effect you can even just stut the valve and you back to standard setup until you can be bothered to replace the old pipes, or you can open it up completely and run with no pre-spool at all and first turbo boost being controlled by your 'primary' boost controller.

 

    I can get the Bleed "H" made no problem...really interested in this mod...can't believe we didn't know about it.

 

It's known about on the supraforums, not sure anyone has documented it on www.mkiv.com

 

    Are there any negative side effects?

 

Some people say removing all pre-spool will damage turbo 2 when it comes on line as it's moving from total rest to high speed very quickly. By doing the mod you will have less pre-spool, so you may decrease the life of you second turbo (but then by increasing boost in any manner you are probably doing that anyway ask JB), you may also decrease the life of you first turbo with the increased boost but it will probably be OK if you sensible. I had mine set to 1.0bar on first and 1.2bar via an APEXi AVC-R on second, and it felt very just right when turbo 2 came in. Any mods you do that increase the boost to increase the performance of the engine is likely to be detrimental to the turbos over time.

 

The only other thing I can think of was Terry Saunders had a hesitation when turbo 2 came in but I'm not sure if it was down to the bleed or the bleed and a combination of all the other stuff he had on his engine to support is wild hybrids.

 

 

(Edited by HardHead42 at 8:36 am on April 15, 2002)