fiestaturbo.com

[turbodaily]

im running a t25 from a lotus esprit on my frst,now i had it rolling roaded at powers last week and they said the exhaust housing was too big for a 1.6 as its from a 4 litre lotus,so i get abit of boost creep at high revs and the turbo gets on full chat around 3400rpm (which is abit laggy for a t25)

so im getting my t25 modified next week to t28 spec,(which is basically a t3 inlet side but a t2 exhaust housing i guess...) just wondered if anyones running one on a cvh and what there like?? im guessing its ganna spool up fairly quick but keep going like a t3??

i wanna get rid of the lag and the boost creep so instead of running 10psi on the actuator and then it creeping up to 13psi higher up in the revs,il be able to set the actuator to 13psi and hold it there.hoping its ganna be aloit quicker than the current turbo which im sure it will be...

any info appreciated people
cheers chaps

[pornstar!]

just stick with a T3

[turbodaily]

nah not a fan of t3's,i prefer the lesser lagged turbos by the time youre boosting up im already gone

[turbodaily]

nah not a fan of t3's,i prefer the lesser lagged turbos by the time youre boosting up im already gone

[pornstar!]

nah not a fan of t3's,i prefer the lesser lagged turbos by the time youre boosting up im already gone

and by the time you've ran out of puff, iv come on boost and disappeared over the horizon

[Superal]

I got a T28 with the evo 6 intake and 360 degree bearings...and although it does run out of puff by about 5k revs (i dont like to thrash my engine further then that anyway) it definately pulls as well as a T3 at a decent psi

[BUTRE]

As always, alot of misinformation and confusion about turbos and what works and what doesnt work.

What makes a turbo lag is the exhaust's housing A/R. The bigger, the lagger.

Its a proven fact that the ERST T3 (S1 or S2) with its exhaust housing A/R of 0.36 lags the 1.6 CVH up to 3000rpm. The exhaust housing A/R 0.48 that is used on the cossie T3 lags the 1.6 CVH up to 3800rpm.

Let me remind you guys that T2, T3, T4 are just families of Garrett Turbos and by it self does not say anything about its setup!

If you have a T25 that lags the 1.6 CVH up to 3400rpm, geting the ERST std T3 will have less lag.

So, smaller exhaust housing A/R is better... when it comes to lag yes, but at high engine rpm the small exhaust housing A/R will choke the engine breathing so at high engine rpm will need a bigger exhaust housing A/R. Its a compromisse situation.

The std FRST T2 chokes the exhaust breathing up to 5000rpm. The std ERST T3 chokes the exhaust breathing up to 6000rpm or so.

When it comes to compression efficiency and by that lower ACT's, you have to look at the compressor side. Study your engine flow demands and take a look at all garrett compressor flowcharts. Go too big compressor and you'll be hiting the surge. Stay away from it! Too small compressor and at high turbo rpm the air is going to be overheated and ACT's go throught the roof! At this point you'll blame the IC but its actually you're fault since you mis-matched the turbo to your engine.

For the 1.6 CVH boosting up to 1bar, the best compromise is the std ERST S2 T3 with Trim50 compressor. It isnt too laggy, doesnt choke the exhaust (unless you're max power is above 6000rpm and you rev past that alot), T3 Trim50 can boost from 0.55bar up to 1bar with efficiency and its a really cheap turbo!

Want the ultimate cheap 1.6 CVH turbo, go to ERST S2 T3 with Trim50 compressor and A/R 0.48 exhaust housing.

T2,T25 and T28 are too expensive and not that better VFM than ERST T3.

[turbodaily]

nah not a fan of t3's,i prefer the lesser lagged turbos by the time youre boosting up im already gone

and by the time you've ran out of puff, iv come on boost and disappeared over the horizon

[turbodaily]

BUTRE,ive had this conversion with george at turbo developments and he highly reccomends the t28 over a t3,i was considering jusyt having a smaller exhaust housing put on but then he suggested i get a t3 inlet too.

[Sunil_FiestaRS_16V]

bit off topic but you got nay pics of your car? im loving your wheels are the dubmeister ones? was considering get 8inch wide 15's for mine

[BUTRE]

BUTRE,ive had this conversion with george at turbo developments and he highly reccomends the t28 over a t3,i was considering jusyt having a smaller exhaust housing put on but then he suggested i get a t3 inlet too.

T28 is better than T3 when its not he paying the bill

Talking only about performance, than you should go GT25... but the costs... ouch!

You can have a T25, T28 and T3 done to your engine and to its currently stage of tune. For me, its all about the best compromise performance wise and value for money.

I'm making a T3 mod to my frst besides other things. I'm using the std ERST S2 T3 with Trim50 compressor (instead of std Trim45 one). Its more than enough for 133 up to 190bhp without losing efficiency.

you can also look to what is really crap on the CVH turbo... exhaust manifold has not equal primary pipes. Inlet manifold does not flows the same amount of air throught its 4 pipes. Alot of improvements can also be done here getting more BHP without boosting any more boost.

Also, std EMS is crap... but aftermaket ecu's are way to expensive for me nowadays.

oh well...

[Superal]

very informative posts...luckily i wasnt the one that had to purchase the Turbo in my car

[turbodaily]

well if i can get a t28 made up for £300 what would you say??

[BUTRE]

well if i can get a t28 made up for £300 what would you say??

Very good price for a T28 mate.

My ERST S2 T3 with Trim50 is coming along for 200quid with all piping (water and oil), actuator and ERST manifold. Manifold and exhaust housing is being flowed since its casting its terrible!

[turbodaily]

i have good relations with turbo developments in brentford so i get good prices, he made me a t3 for my escort with a 48 housing 2wd cossie compressor wheel and it was so laggy,came in around 4500rpm but when it did come in youd know about it

another thing i forgot to ask,is there a reason for why some turbos flutter louder than others?? because my t25 flutters REALLY loud,just wondered if it could be fu.cked

cheers

[BUTRE]

i have good relations with turbo developments in brentford so i get good prices, he made me a t3 for my escort with a 48 housing 2wd cossie compressor wheel and it was so laggy,came in around 4500rpm but when it did come in youd know about it

another thing i forgot to ask,is there a reason for why some turbos flutter louder than others?? because my t25 flutters REALLY loud,just wondered if it could be fu.cked

2WD cossie T3 is exhaust housing 0.48 A/R with Trim50 compressor. On the CVH 1.6 it spools up about 4000rpm or so. If yours was spooling up at 4500rpm its because the turbine you had had cut-back blades.

T2 and T25 are alot lounder than bigger turbos because their compressor (inlet side) is smaller and needs to make alot more rpm to make the same kind of boost.
An idea:
T3 Trim50 to boost 1bar and flow 26lb/min of air (1.6cvh engine making 6000rpm and 170bhp or so) is making 130k rpm. T2 or T25 to make the same boost and the same flow it needs to make even more rpm, so the lounder chatter when getting your foot of the throotle.

The sound of a T4 is amazing! You cant tell right away the its a big moth...

Note: the power figures are for std 1.6 cvh. If using another cam or head work, etc... the power figures will be diferent at diferent rpm.

[~Tony~]

my mates pulsar was running approx 300 bhp using a t28 turbo boosting at about 1 bar. spooled up very nicely. not much lag and pulled right through the rev range. which goes to 9k.

i'd basically like the same on my frst unsure of where to get one and what spec it was to though. great fun to drive. stronger boosting than my t2 and no major reduction in pulling at the rev limiter

[Stoned]

A guy on Passionford fitted one to his ERST and found it to be better than the T3 in every way, this was the 1.6cvh

I've got a larger type standard T28 fitted on mine as standard and it boosts my standard engine to 315bhp at 1.1 bar which it will run all day. Spools up to full boost at 3k

Good turbo's, but superceeded by the GT series. I would get one of them.

[turbodaily]

really what i want, is for it to spool up harder and pull better than my current turbo running on the same boost setting. hopefully the t28 will be alot different....

[BUTRE]

Ok, alot of confusion and misinformation regarding turbos.
Only talking about Garrett turbos:

Garrett has got to main divisions on turbos: T series and GT series.
T series has got this families: T2, T3 and T4 ONLY!
GT series are alot more complex since its families comes from so called "hybrid turbos"... but talk about this and where they come from latter... also, T series are journal bearings and GT series are ball bearings: less energy to spool up=less lag; better compressors design, etc etc

Only saying its a T3 it only says its a garrett from a T3 family. It says NOTHING about its internal spec and about its potencial. If you say its a T3 from a ERST, then everybody can say that its spec is 0.36 A/R exhaust housing and Trim45 compressor and knowing this you can take a almost certain guess of its potencials on a certain engine. The lower the exhaust housing the less lag you have BUT at high rpm the exhaust housing its less restrictive so if doesnt chokes the engine "freeing" more BHP. You can only talk about A/R and its lag if the diferent exhaust housings are from the same family.

Saying that its a T34 it only says that it uses a T3 family exhaust housing with T4 family compressor. Can we be certain of its potencial? Nopes.
T34 is also know has a T3/T4 turbo.

So, just knowing its a T28 wont give you anything. Dont have any datasheet about this turbo but I'm guessing its a T2 exhaust housing with a moded T3 compressor housing.

If you are on a tight budget building a 1.6 CVH up to 180bhp, go for a ERST S2 T3 turbo (0.36 A/R exhaust housing and Trim45 compressor) but with Trim50 compressor. Leave the exhaust housing and turbine in its std spec.
If you want to go a step further (200bhp+) on a 1.6 CVH, go for cossie T3 std spec (0.48 A/R exhaust housing and Trim50 compressor) and keep its compressor or take a good look at the Trim60 compressor flowchart.

For 2.1 ZVH and Zetec-T... thats another story.

[BUTRE]

my mates pulsar was running approx 300 bhp using a t28 turbo boosting at about 1 bar. spooled up very nicely. not much lag and pulled right through the rev range. which goes to 9k.

i'd basically like the same on my frst unsure of where to get one and what spec it was to though. great fun to drive. stronger boosting than my t2 and no major reduction in pulling at the rev limiter

Whats the spec of that T28? Also, you comparing a pulsar engine to a CVH? Pulsar's engine its a true engine done for racing just underpowered for road mate. Oil injectores for cam lobs, chain driven and not toothbelt, etc... also its 16v head flows alot better than the CVH head.

A guy on Passionford fitted one to his ERST and found it to be better than the T3 in every way, this was the 1.6cvh

I've got a larger type standard T28 fitted on mine as standard and it boosts my standard engine to 315bhp at 1.1 bar which it will run all day. Spools up to full boost at 3k

Good turbo's, but superceeded by the GT series. I would get one of them.

Stoned, there are two diferent T3 turbos used on Fords. ERST T3 and cossie T3 and if you test them on a dyno using the same engine and same boost it will give you different lag, diferent ACTs and diferent BHP.

really what i want, is for it to spool up harder and pull better than my current turbo running on the same boost setting. hopefully the t28 will be alot different....

Your lattest turbo is a...

he made me a t3 for my escort with a 48 housing 2wd cossie compressor wheel and it was so laggy,came in around 4500rpm

Thats a std cossie T3 turbo... unless he got cut-back blades and thats the reason it lags so much. Getting this turbo in std spec on a 1.6 CVH it will spool at +-4000rpm.

Gav has got this turbo on hes CVH. Ahmed did the spec of hes complete engine and its giving 211 genuine BHP with 1.1bar of boost. Hes CVH was done the right way and on a tight budget.

[turbodaily]

ive decided to go for t3 cossie spec for the same price now

george at turbo developments told me cut back blades saps abit of power,he said therye usually found on rally cars where there boosting for long periods of time,and the tips of the compressor blades get so hot they practicly go transparent and they can come away from the blades and break off into the turbo,so they simply cut the tips of the blades at an angle to stop this,but as a result they dont flow aswell or something..

[BUTRE]

For me, to achive over 200bhp on a 1.6 CVH the std cossie T3 is the best way to go.

Also, I found this:
http://www.turboneticsinc.com/downloads ... Matrix.pdf

For the 1.5, they say 150bhp to be achived with a T3 50 Stg1 .48 A/R. This means T3 with Trim50 compressor and 0.48 A/R exhaust housing. For some tunners the turbo spooling at 4000rpm isnt lag

Its a good matrix to start studying what turbo to get.

btw turbodaily, you have on your signature "185bhp @11psi stage 1"... with a 1.6 cvh? Whats your spec and can you show the dyno graph?

[turbodaily]

butre,yeah it was running t25 turbo,light balanced bottom end accralites,cvh35 cam.stage 1 chip/blue injectors.

[BUTRE]

butre,yeah it was running t25 turbo,light balanced bottom end accralites,cvh35 cam.stage 1 chip/blue injectors.

185bhp with only 0.75bar... thats really a good achivment!