stevep360

iTrader: (20)

What front mount u got jef?? A hybrid??

jef

iTrader: (13)

yeah a hybrid, one of the older gt 2 kits i thnk with bespoke pipework. was removed from my previous set up

itll remain as it is for time being, its jsut a possibilty maybe over the winter to look inot

no reverse scoop

but back on topic lol

stevep360

iTrader: (20)

Pleased I went aps 725

P1Drifter

iTrader: (7)

yeah enginetuner built the long block and i did the rest, spec:

CDB
Nitrided 2.5 crank
Wiseco Pistons
K1 Rods
ARP head studs
ACL race bearings
Cosworth head gaskets and baffle plate
RCM 850cc injectors
Turbo technics S206 billet turbo
STI V3 heads (stock)
ACT single plate organic clutch
Parallel fuel rails with swirl pot and external bosch 044
Reversed inlet manifold and flipped intercooler
Probably loads ive forgotten plus all the usual stuff suspension, brakes, handling etc, brilliant setup, love it

toyney83

iTrader: (3)

looks a lovely set up that mate. Dont know much about the k1 rods but alan jeffery told me there a well made product. how does the 2.1 feel different to the 2.5? when mine was an the 2.0ltr bottom end i was running 420/380 and that felt alot quicker than the 2.5 with 380/420

stevep360

iTrader: (20)

any mapper will tell you that a 2.1/2.35 will rev so much better than the 2.5 and can be mapped to a much higher boost level. I am going 2.35 so that I have future proofing.

P1Drifter

iTrader: (7)

like i said the initial torque hit on the 2.5 was great but then it felt like it died off pretty quick, the 2.1 just hits hard and doesn't stop until i change gear at 8k and it all starts again i run 2bar of boost on the 2.1

If you want to know anything about the engine etc give Alan or Martyn a ring at enginetuner, think they have turned out more of these than they have had hot dinners !

Kwik

iTrader: (10)

ET will be handling my rebore and rear thrust conversion when i eventually get the funds together but i'm so tempted to just them to do the full build on bottom end. Although part of me wants to do it myself and learn about tolerances and plastigauge.

P1Drifter

iTrader: (7)

if i were you i would ring Alan, you might be surprised at what they charge to put it all together, plus you know its been done 100%

you may get away with a little mistake here or there on a low power build, but do you really want to put all that time and effort in, ramp the power up only for it to fail for some stupid reason ?

jef

iTrader: (13)

in hindsight, probably wouldve done same, but live and learn cant exactly say im dissapointed lol - what money was in the APS kit mate? and fully built yourself barr the long block?, nice work mate!!

sorry for being a pic *****, but i do love it, lol

stealthy55

nice

Kwik

iTrader: (10)

Very very nice! I looked into the APS kits and they certainly aren't cheap. A reverse scoop i thought did the reverse of a standard scoop IE will throw air out of the engine bay thus helping the FMIC stay cool, thats why they are more common on Evo's. There's also a water spray kit in the selling section for like £60, and i've read some people fit them under the top section of the bumper out of sight, spraying onto the FMIC.

I may be way off but it should get the temps down.

jef

iTrader: (13)

didnt even think about reverse scoop, but tbh i really dont like the look of what ive seen, im not about all T.A look and rather stay starndard as possibe looking, within reason.

water spray, better i/c , turbo blanket, reverse scoop all possibilities, but for time being will be as is, but defo something to look into, if a iever get "bored" with the power lol.

stevep360

iTrader: (20)

paid a grand second hand but it was boxed new guy never fitted it

Kwik

iTrader: (10)

Bored lol, i'm still not bored with my near-std WRX after 6 yrs with only around 250BHP.

s5ooob

iTrader: (1)

Can anyone say exactly, what prevents the 2.5 revving like a 2.0/2.1 etc?

Looking at it, most of these configurations, barring the 2.0, use the same ej257 crank and I believe some 2.5s also utilise the 2.0 length rods...so the only difference I see there is piston size and bore diameter, is this an issue?

Is breathing a limiting factor? would bigger valves and/or higher lift/duration cams be of benetit?

A 2.5 that revs strongly to 8000rpm, really must be like having your cake and eating it.

dazdavies

iTrader: (22)

Good god there's some nonsense being posted here!

There's nothing wrong with a 2.5 built with the right parts.

They don't rev? Nonsense!

I've a forged 2.5 it made 601bhp and 565 ftlbs on STANDARD cams and UNPORTED heads 2bar by 3800rpm on the dyno it spooled quicker on the road and easily revved to 8000rpm and beyond. My 1 and only day on a dry drag strip ever and it did a 10.90 1/4. 0-100 mph in 7 seconds flat in 220 yards at circa 520 bhp.

The 2.1 and 2.35 are great engines but Those who say the 2.5 won't perform are talking absolute rubbish.

jef

iTrader: (13)

glad im not one of them tehn tbh

ive catagorically stated with just forged pistons and decent bearings, mine was great!

i never said mine wouldnt rev, i said i was afraid to rev it

dazdavies

iTrader: (22)

Wasn't referring to anyone in particular Jef it just grates me when people say the 2.5's don't perform. Admittedly with the wrong combination of parts they won't but that's the same for any engine

jef

iTrader: (13)

totally agree, thats why from start of this thread ive said you must drive both abd choose the one that suits your expectations best - anything else is just here-say tbh

stevep360

iTrader: (20)

I dont profess to be an engine expert I was only basing my thoughts on what I had been advised by a few respected mappers. Hence the reason I decided to go 2.35.

Tommy2396

My 2.5 pulls like a train and revs hard if I feel in the mood to give it a thrashing which is not often. Still to this day I feel like a naughty boy afterwards and am left with the shakes and worry with what wear I've caused lmfao

dazdavies

iTrader: (22)

2.35 is a belting engine and again with the right parts will produce great results. They are cost prohibitive though. I was just sticking up for the 2.5 because it gets unnecessary bad press and a lot of that is from people who have never had one. One thing will say is that i think the limit for a 2.5, is around 600 bhp beyond that you need to be looking at cdb and stroker options. But this thread is specifically for road use and anything over 600 for road is bonkers .

As a closing statement. A forged 2.5 with a billet gt30 is just about as god as you can get fora road car

stevep360

iTrader: (20)

Yeah going billet gt30 on mine

dazdavies

iTrader: (22)

Mine is a billet 35R and it's perfect for the 2.5.

Billet 30 and a 2.35 is a fantastic combination. I'm sure you'll have lots of fun with that

My next engine will be a stroker of some variety purely because I want the strength to get the best from the turbo. Although my current block is pinned I daren't go further with boost and timing.

stevep360

iTrader: (20)

Have you seen alyn's inserts?

urban

iTrader: (1)

toyney83

iTrader: (3)

what liners were you using on yours daz?

legacy_gtb

iTrader: (3)

+1 for the 2.5 on the road! For the road, a decent 2.5 with an SC46 is stunning!

New_scooby_04

iTrader: (4)

It's also worth remembering with all this talk of revving etc that even the JDMs cars that rev to 8k have given their best well before that point!

On a 2.5 without an upgraded valves etc there is just no point in going above 7k (the hard limit is set at that on mine), all it's doing it making more noise at that point! It'll get to 7k rpm really quickly though! I can tell you from experience, that a 2.5 with an SC46 rips though even the long ratio UK 6 speed box very nicely!