JonnyBravo

Thought as much

I really shoudn't doubt myself so much

rapidcossie

yeah it lasted a good while too even tho I kept getting asked when I got the straight cut box fitted

It used to wheel spin a wee bit in the wet

rapidcossie

Boost plot.

JonnyBravo

What gearbox and diff are you using now then ?

Can we maybe see this on track or are you another Rod Tarry ?

rapidcossie

I actually have a peak recall in my SPA of 40 psi

Johnny the car SO isnt a track car and would be useless.

I will be on Knockhill at some point but doubt any of the big english tracks even tho I have been offered track time at Ford fair byt he nice people at Fast Ford.

rapidcossie

Old RR graph of what the car ran at daddy thrash.

rapidcossie

I now run a getrag gear box and the standard diff

JonnyBravo

Gearbox looks ............ well BIG ! Is that the jag or bmw box then ?

I totally see what your saying though but atleast if it was seen on track anywhere being used slightly in anger then you couldn't be tarred with the straight line brush.

White Saphs are always the quickest eh !

Best of luck with the new turbo, seriously impressive car.

rapidcossie

Its from a XJS and says Jaguar on the casing aswell as Getrag 265.

Its in the car now and feels just like the box in my old M3, over left hard from reverse instead of the normal ford postition.

I would put my car on track but really need to sort the back axle first to try get some traction out of bends.

Staffi

iTrader: (1)

Euan, get yourself down to Brom, honestly mate i wish you could have a drive of mine, it's a fantastic bit of kit.. mind you so are the quaife box and diff...

JonnyBravo

No doubt in time Euan you will get it sorted enough to do a track day.

Its not a dogleg box then ?

abdr500

iTrader: (1)

rapidcossie
2.6 bar from a t4 i was told buy a few tunners that a t4 should not be pushed past 2 bar it wount make any more power how much pre load is on the actuator arm or is it done on the boost controler

JonnyBravo

Its not your average T4 mate

rapidcossie

Staffi...I would love a shot in a well sorted set up so maybe one day

Johnny its not dog leg. Not 100 % on ratios but its I think its pretty similar to the T5.

Abdr...Im not 100% sure how the boost is controlled on my car, I do have a boost controller which runs with the managment but have also seen the actuator adjusted during set ups on rollers.

abdr500

iTrader: (1)

ok so whats differnt then i think once he siad it had a modyfied wast gate hole

rapidcossie

Wastegate penny has been enlarged along with alot of work elsewhere in the turbo.

abdr500

iTrader: (1)

rapidcossie
ok so may be a better flowing front comp wheel or has it got a differnt back housing

JonnyBravo

Eaun- I remember Ryan mentioning to me about the jag box, tough as anything and obviously a fook load cheaper than most other boxes.

Are you having to get a bellhousing made ?

rapidcossie

Im not 100% sure mate.

rapidcossie

The box was buttons compared to other options mate.

I got it overhauled and checked and it was still under 500 quid

AVA have made a adaptor/spacer plate that makes the getrag fit the T5 bell housing.

Staffi

iTrader: (1)

Anyway, back to the GT30 question..


I know that Kev Atkins has been running one for along time now in his Evo with VERY good success in time attack, all thanks to Sheady building yet another fantastic engine, so i think i'll give it ago, booked it in for the 20th Aug with Karl, L8 and a set of 1000cc injec

rapidcossie

Kev now has a bigger turbo I think.

Speak to Mark about GT turbos as his engines are the only ones that dont seem to surge with the GTs.

Staffi

iTrader: (1)

Euan, who maps for you??

rapidcossie

Alan at AVA

yrkesman

Is that pre turbo backpressure on the bottom of that plot?

Fiecos Dan

You have either mis understood him, or he's telling you crap.

As if he can improve a T4 spool as good as a T34, then he could also improve a T34 spool up so its as quick as a T3. and so on.

its all down turbo spec, engine spec, cam timing and mapping.


Very similar to my GT30 boost, as i can get 35+ psi @ 4000 rpm.


i haven't played with the cam timing yet, so should be able to improve.



i cant comment on a T4 as never had one, or driven a car with one.

but my GT30 is fine. and once i actually do some testing on a RR and finish the setup, i cant comment on how good it will be.

marco polo

iTrader: (1)

hi euan

im on about none modded normal old garrett turbos , yours is modded like i said the only have 3.5k power band ask any tunner

normal To4 4k-to 7.5k starts tailing off then

normal T34 3k to 6.5k starts tailing off then

noraml T03 2k to 5.5k starts tailing off then

marco

Fiecos Dan

Marco,
it might be a good rule of thumb, but different engine spec will differ that theory.

marco polo

iTrader: (1)

hi dan

with you i do know that if you mess about with the turbo's and the cams you can get better results

what i have quoted above was standard turbos on standard engines


marco

Fiecos Dan

rapidcossie

Maybe it is true then Marco?

yrkesman...sorry im not sure what that is at the bottom of the graph.