which turbo charger

[w_parker]

I was looking at getting a new actuator but then thought, Nope...i will just get a new turbo. Now which turbo will be a good choice to go for but will bolt straight onto my evo 4 gsr with out modifications???. Or is it wise just keeping my original turbo if theres enough scope in it to get some good power out of it???

 

[fq-craigus]

To be honest updating the tubby on a 4 if you have a 4 engine still is not much point as the 4 tubby can handle more boost so more power but putting a bigger one on you will need a stronger engine capable of more power first

 

[HermaN]

As above, I wouldn't run too much power on a standard Evo IV engine. To be honest, even on the likes of an Evo 5-9, the OEM turbo can make more power than the stock rods can handle, so an engine rebuild should always be on the cards if fitting a bigger turbo on an Evo.

 

[w_parker]

thanks guys, Coming from skyline ownership to an evo is very different

 

[GG205rob]

http://www.evoowners.co.uk/showthread.php?t=4466

That should give you a good idea of best basic / stage one mods. Pretty much all you need to know in that first post.

 

[Dirtmatt]

That's not strictly true.. Iv turbo isn't great, can get improved spool without going far on the boost. A rs spec turbo or one from an evo 9 could be worth the investment, especially if linked with mr cams.

Rods are a weak point, iv has a few other issues to do with block design.

 

[HermaN]

That's not strictly true.. Iv turbo isn't great, can get improved spool without going far on the boost. A rs spec turbo or one from an evo 9 could be worth the investment, especially if linked with mr cams.

Rods are a weak point, iv has a few other issues to do with block design.

Yes, but I personally wouldn't push a stock IV engine too hard. 1.3-ish bar of boost at most, on a 5-9 engine you can run more boost quite easily, for the money of a IX turbo there are other better mods he could do as his engine is the weak link in all this, an Evo 4 turbo at 1.7 bar would probably result in a dead engine before a dead turbo.

 

[rx jamie]

evo9 series 80 is a good upgrade

 

[Phil74]

Yes, but I personally wouldn't push a stock IV engine too hard. 1.3-ish bar of boost at most, on a 5-9 engine you can run more boost quite easily, for the money of a IX turbo there are other better mods he could do as his engine is the weak link in all this, an Evo 4 turbo at 1.7 bar would probably result in a dead engine before a dead turbo.

Stock engines take a lot more than people think as have had E5-9 stock engines running 435 BHP with an E9 turbo, 3 angle valve seats, ported and gas flowed. All standard internals and with 450 BHP with MR cams, 260 & 264 cams at 1.5 bar of boost. E9 Turbos can handle up the boost and i have seen them doing 1.7 bar of boost but thats at its limit.

With just having 3 angle valve seats, porting and gas flowing with a set of cams and vernier pulleys makes an awful difference in torque and BHP.

I would get head work done for very noticeable benefits to your stock engine with stock internals and fit some 264 cams with E9 Beehive valve springs and retainers before i would change my turbo.

The E4 block has issues with the main bearings which makes it common so many crank issues.... I would get myself an E5-9 block as you will at some time need your bottom end doing with an E4.

 

[Simon@NTS]

your a brave man phil, saying that knew a lad who ran a s205 on stock e8 450bhp still running to this day, personally i like to keep the margins to 5-6 380 and 420, 789, people will differ in opinions but stock engines are now 10+ years old, ps will be down tommorow phil

 

[Simon@NTS]

to add phil havent you looked into e4 thrust bearing conversion?

 

[Phil74]

Brave??? lol. These engines are capable of so much on stock internals and makes such a difference having the head done with 3 angle valve seats, porting and gas flowing. I know a guy ruuning 520 BHP on standard stock E8 MR internals with bee hive springs from an E9 an a GT30 turbo :awesome:

I would still rather have a fully forged engine though for torque, power and reliability

Yea we defo need to have a chat mate

 

[rx jamie]

i ran my evo 6 engine just below 400bhp then over 400bhp for 18 months. it only failed because of i let the oil level get too low and it the oil surged on acceleration and ran number one big end dry when i stripped the engine, the rods, piston and rings were all in excellent shape. wish i could have said the same for number one big end though. shells had welded themselves together lmao.

 

[Phil74]

to add phil havent you looked into e4 thrust bearing conversion?

Engines prone for damage to the crank are the Evo4 as the centre main/thrust bearing isn't desinged for a pull clutch so doesn't get lubricated properly so the thrust faces get worn which is unavoidable *evo 1-3 used a push clutch and the Evo 5-9 block has a redesigned centre main bearing and oil supply to the centre to cure this*. The E4 are prone for crank walk due to the design and manufacture by Mitsubishi which was quickly detected and redesigned by Mitsubishi on the launch of their Flagship and world class leading rally car the E5.

Swapping to a push rod type clutch does rectify the E4 being famous for crank walk and doing the big end bearings but a thrust bearing conversation does prolong this considerably on the E4. The price of a thrush conversion kit for an E4 and fitting it makes for a better option to replace the E4 Block with a later block from an E5-9 and this issue of crank walk, big end bearing issues are sorted although any evo can suffer crank walk but it is very few that do so on an E5-9 block if serviced correctly, regular oil change with a good 10-60w ester oil

The 4G63 engine is a legend and a very strong engine which is capable of massive power and torque and rather cheap to make to a 2.3 engine with the kit being around £1300 if you shop around for the parts. Crank is the stock crank out of another Mitsi car using the 4G64 which are standard in the Mitsi Galant and Eclipse until 2004. The only problem with a 2.3 or 2.4 stroker in an Evo is your lose torque but have massive BHP and BHP is only a man made figure

 

[Mr Ralliart]

Put on TME 15G for response and low down torque, or for more power over all, you can'T go past an Evo IX Turbo.
I run the standard TME 15G turbo and it makes about 337 hp at the wheels easily with torque peak at 4000rpm.

 

[Dirtmatt]

What you really want mate is the turbo from my 8 ;-)

Quick spool up and will hold good boost more than enough for a iv, plus its a cheaper option than other turbos lol.

 

[RsvRob]

Put on TME 15G for response and low down torque, or for more power over all, you can'T go past an Evo IX Turbo.
I run the standard TME 15G turbo and it makes about 337 hp at the wheels easily with torque peak at 4000rpm.

TME has a std 16g. It spools quicker because of the titanium wheel

 

[Mr Ralliart]

TME has a std 16g. It spools quicker because of the titanium wheel

JDM TME GSR has 15G, RS has 16G. All have the Titanium wheel but the 15G spools quicker.