Mine and JamboRST's cars are 1.6's with a similar spec.

I have a T28 with tubular manifold and Jamie has a T3 on standard manilfold.

I did this chart to show the differences



My graph

CLICK

Jamies graph:

CLICK

Why is there so much of a difference in power :top

 

Well, from that information, yours is a fair bit laggier. 1000rpm by the looks of it! Also, the power difference depends so much on alot of other things. What T28 is it for example? There are many variations.

Also, the tubular manifold may be negative at your level. There is a possibility that it isn't needed.

I have about 1-bar by 4000rpm on my current turbo (GT30), so I would say that there is something not right with yours.

 

And jamie's running more boost.

 

Christian i dont have the spec of the turbo(think it may be an Escos spec) coz AVA fitted it, dropped the car off and picked it up a week or 2 later.

A few people have said before the manifold has made the power come in later

 

It is very likely that a less restrictive manifold could make the turbo come on boost later.

It is easy to get carried away with thinking that a T28 is better than a T3, but I think the difference is marginal. It's not until you get into the uprated T28's that the differences are more apparent.

 

Dave...you car is very close power wise over 4k with a good bit less boost.

I think you should fit a bigger turbo Daveand you would see the benifts of the manifold.

 

What turbo though

Wouldnt a T3 be similar to Jamies and a T34 a bit laggy for a 1.6

 

I totally agree with Euan. Dig deep and buy a GT28 IMO.

 

Price and advantages please

 

GT28's start at around Ł700 depending on exact spec.

Advantage is obvious. More power!!

 

Will it bolt on without any mods

More power for me means EFI as the MFI is struggling at the moment

 

it's pretty horrendous your t28 curve

Not a lot of power, and big lag. To be honest, first thing i would do is run more boost.

 

Cant run anymore boost due to it not getting enough fuel coz its on MFI

 

speak to Alan about the T3 turbo he developed for Andy_R's car.

 

Hows do other people get more power on MFI? Andy_R's did 220 on MFI did it not?

 

andys was runnin a much wilder cam than davies and he was on a modded t3 with lots more boost,think andy seen 228,not sure if that was on std head or big valve head or not,andys engine spec at that point was exact same as mine,except he had all the fancy manifolds waitin to go on

 

On MFI with fifth injector I ran 24psi no dyno data, but when the fifth injector stopped working there was a hugh power drop off.

Did Santa Pod though 14.1 sec with a terminal of 109.

Simon.

 

So how did he get the extra fuel needed?

I know nothing about RS turbos

 

davie i recall a convo with alan about why your not runnin more boost i seem to remember it was something to do with you blowing the head gasket twice and havin to get the head skimmed or block skimmed,cany remember fully,your in the same boat as me,i could keep squeezing as much bhp out the k jet or go for after market(not ofab as its worse than ive got) but ive not got 2.5k to spunk on it,also what head u using,stg 3?big valve?what pistons you got

 

think alan would be the man to explain this to you but it would involve modifying the metering head,also depends how good andys metering head was,mines was good for 195@wheels before needing modded where ive seen them as low as 120 before needin modded

 

You can go EFI for just under a grand fully fitted.

Best mod I ever made to my car.

S.

 

i HIGHLY HIGHLY HIGHLY recommend putting on an MF2 5th injector....

 

i was under the imopression that ofab was good for only 220@fly,whats the most sen from ofab management

 

who do you HIGHLY HIGHLY HIGHLY recommend that too
im lost in this topic

 

I dont know what ofab is capable of?
I was refering to Gotech!
S.

 

Jamie the head was skimmed twice but there was hardly anything taken off of it.

Its a Specialised engines stage 2 head and mahle 7.5:1 pistons

 

For me then it looks like EFI of some sort and a GT28

 

T28?? More boost?? LOL. It's a T28 we are talking about. It's practically on it's knee's at that boost!!

 

So Christian what turbo would you use with the spec i PMd you

 

Green shed done 265@wheels on MFI did it not? think it had a 5th injector tho

 

green shed stil sits at AVA...can someone not buy the engine?

Its a wicked looking engine bay

 

Its been on the go for a good while always used to sit round there many moons ago

 

ok i run ofab managment.. who said that u cant go above 220bhp?? as i spoke to stu @ msd yesterday and he will do me a weeks live mapping on my car and spec, but he said that my beige injectors will max out at about 220bhp (ish) but he can live map it to different injectors, so im thinking of getting a bigger set of squirters and go for 250bhp..but obviously may need bigger map sensor for more boost.

 

Would love to buy it, but not at the price Gordon wants for it

 

efi as in ofab or aftermarket management,ofab you could do for under 1k but as far as i know only msd(of the reputable tuners) can map it and that would mean no set ups at ava no more unless you go for ava's own which is 2.5k supply and fit last time i asked( i keep askin hoping it will come down a little ) then takin into consideration the buying of a new turbo and then the gearbox your gonna need too want my advice keep the money sell the rst and buy a cossie,at least the cossies gonna take the power where as the rst just can cope with that power never mind anymore,you could get another 30-40bhp but much of that power can you put down,or you could just bolt on a t3 and enjoy the new found torque in the mid range(though T3 RST just disny sound right),i for one will not be spanking anymore money on my rst and its only a matter of time before i break it and buy a cossie

speak to alan and discuss your options,he would do you a modded t3 like he done with andys,max boost by 2800rpm right to 7200rpm where he made peak power,now that is a powerband

 

Jambo..when was the last time you asked about the management?

Dont think its 2.5 k?

 

it was colin im sure that told me last time,thats supply fitting and mapped
is it less than that like?what price is it?

tbh mate i dont know what this included,maybe it included the full monty to convert

 

I was told a similar price

 

Whats the full specs of each car?


i would fit the same turbo as jambo's, as it seems to out perform the t28 all thro.

 

Not sure about exact price but dont think its that for a cossie...

suppose there is ALOT more work to convert an S2 tho.