T2 or T3

[Mike]

On a 1600 8v Turbo conversion? Any input anyone?

[R1CH]

I'd of thought a T2 would be more suited to a 1600 tbh, but all depends on what kinda spec the motor is and what size turbo (trim / housing size) you have in mind.

[Stoo]

T88 boooooossttt it right upppp

3 bar at least

[Adam]

Depends on power/revs/amount of lag your prepared have

[Paul]

I'd say T2,to go with the simple fact as it doesnt take as long to spool up as a t3, and can still deliver nice power, and in a smoother way than a t3 does!

Depends on how its mapped though...

[Ash]

I know nothing about turbo's but wouldn't a T25 be inbetween the two and so solve your problem?

[s14a]

my courtenay 1600t used a t2

[Rick Draper]

All depends on a/r's of the turbo. Its easy to say T2/T3 but you have loads of variants of them so its not that straight cut. You need to know the size of the hotside of the turbo and the compressor etc. Also you could really do with a compressor map.

[Stuart]

agreed with mr raper.


imho any 1600 8V build "should" be aiming for 200bhp with nearly all boost by about 3K at the latest.

so you need approx 20Lbs/min of air for 200bhp in the middle efficincy island of the map (ideally).

something like this "could" be perfect
http://www.turbobygarrett.com/turbobygarrett/catelog/Turbochargers/GT22/GT2252_452187_6.htm

[craig green]

Surely it would all depend on the spec that the engine is built to aswell?

ie, std management, de-compression spacer etc... small T2 for lagf free, low boost safety.

Forged low comp pistons & mapped standalone.... bigger blower/more boost.

Small Garret T2 or similar on the 1600 is very effective however IMO. Max booost reached literally just off idle, no lag & thus actually able to sprint away from a stand still very quickly indeed.

[Stuart]

as you say it depends how the build is done (or bodged.....even by the "pros")

imho there is next to no point spending a good chunk of cash to get it barely above what a T40'd 1600 could do, when with a little more planning and thought you could easily hit 200bhp and have it very driveable.

[craig green]

I wouldnt disagree. However the power delivery between the 2 is so different. Cost aside I know which I'd chose.

[Mike]

mho there is next to no point spending a good chunk of cash to get it barely above what a T40'd 1600 could do, when with a little more planning and thought you could easily hit 200bhp and have it very driveable.

I will only need to buy a turbocharger and an intercooler, the exhaust manifold comes to a total cost of ?28.75 for parts & a bit of MiG welding, the spacer plate will cost me ?0 & a adequate FPR is costing me ?25 :thumb: that just leaves the downpipe.

My labour is free ;) my metal working skills are more then adeqaute to do this job :thumb:

[Philsutton]

didnt the 1600 rs turbos come with a variant of T3 ? I would say go T3 an booooooooooooost it into the middle of next week

[Adam]

Esc RSTs did yeah.
Even the baby fiesta had a T2.

[Mike]

^ IIRC, Escort RS was a T3, and Fiesta was a T2.

Renault 21 Turbo uses a T3 though, along with some old SAAB's (9000T)

[Stuart]

ps your labour isnt free ;) but lets not fire that argument up again lol

[Mike]

ps your labour isnt free ;)

lol it is, i have set day/times to work on the Nova. They are set as at those times i wouldnt be doing anything else, at all lol

[craig green]

All the T3's mentioned above will be of different specs.

I suggested a few years ago to Chip about putting a Escort RS turbo T3 on my 1600 & he advised against it. Saying it'd be too big!

[Philsutton]

^^ surely that depends on what your planning to get out of it. If the rs came with it then surely its good enough for a 1600 nova? PLus they are dirt cheap as well.

[Mint FRST]

Unless your running or want mental boost I would go T2/Hybrid or T25.

My old FRST put out 175Hp ATW on 15psi on a T2 Hybrid. Made for a nice drive with quick spool up and more tractable.

Will your spacer plate arangement cope with a T3 spooling 20psi of boost?

Management is another key factor, plus you know I have a nice low mile hybrid lying round also lol

[Mike]

Hhhhhhhmmmmmm. Spacer plate will be around 1.6 to 2.0mm thick, ive not measured the thickness of the stainless ive got here. Im leaning towards a max boost pressure of around the 10PSi (<MAX) and I'd be happy to make 150hp ATW with standard management to start (as im a cheap skate) and a cast steel manifold.

P.s. Chris, i still have those ARB bushes for you mate :thumb:

[Mint FRST]

I know mate. Will take' em at the meet in the new year. Unless you want Paypal now! lol

[Mike]

I know mate. Will take' em at the meet in the new year. Unless you want Paypal now! lol

Cant wait till the new year Chris unless you need them ASAP?

[Mint FRST]

Oh back to topic, T2 will piss 10psi(A FRST item anyway) so Id stick with that.

[Mint FRST]

Cant wait till the new year Chris unless you need them ASAP?

Take it you mean canlol . New year it is mate. Got some serious drinking to do over Xmas so wont need em:(

[Mike]

Take it you mean canlol

Thats the bunny :thumb: thats fine with me mate, there in the Cav anyway, so will be with me at the pub like.


Oh back to topic, T2 will piss 10psi(A FRST item anyway) so Id stick with that.

Just what i wanted to hear, as T3's are easier to get, therefore cheaper ;) and should anything go wrong, I know full well PJ Motorsport (Cosworth specialists) stock sh1tloads of T3 parts & are about 2 mile from me :D

T3 it is then me thinks :D

[Mint FRST]

Nah - Im saying T2!

[Mike]

Any particular reason Chris?

[Mint FRST]

To suit your management and level of boost you want to run i.e. 10 psi.

It'll be more responsive i.e. come in at lower revs and provide more uniform power delivery so won't create as many traction issues.

Im no turbo expert, but my T2 equiped Fiesta use to waste my mates T3 equiped one. Take you want something quick round the streets? T3s are more laggy and more suited to full out blasts i.e. higher topspeeds on the type of setup you will create.

[Mint FRST]

Problem is they are alittle more fragile and cost more. If you go T2 route water cooling is a must and proper warming up and spinning down time will prolong its life in conjunction with regular Oil changes i.e. every 3000 miles.

[Mike]

^ Ahh kewl. Im just looking around now for a T25 or a T2, I've got a T2 sat at home with knackerd oil seals. I think I may just use that if I cant get a working T25 on the cheap.

[craig green]

I found the T2 with the Courtenay conversion was as FRST says, really tractable, awesomely quick spool up, & much quicker than lots of other stuff just because of its sheer lag free 'get up & go' nature.

My mate has a 200+ bhp Escort RS that I have blitzed many a time, even on just std 6psi actuator. With a GBE boost controller, it was spooling quicker still & I had it running 12psi which was pretty rapid. But I only did that for a few months in winter with cold nights etc.

[Lee H]

I had a T25 variant on my Renault 5 turbo and that wasn't noticably more laggy than the standard T2 (even with a 1.4 pushrod) but allowed me to run more boost.

On mine both turbo compressor and exhaust wheels were bigger than on the T2 though whereas a mate had a T25 hybrid but with a T2 exhaust wheel so all depends which T25.