Bolt on turbos
 

I'm going to have Engine Tuner build my Bugeye WRX engine as a 2.1 stroker and would like to fit a TD05 20G, however I'm having a really hard time finding one!

I've seen & heard on here and various Facebook groups that they can be had for around the 500 mark (rebuilt ones not new of course). Most of the content i can find talking about them is years old and recommends Andy Forest, however when i contacted him a while ago he said he no longer does turbos as he is focusing on remapping.

Does anybody know where i can get a TD05 20G, or somebody that rebuilds them? Or even recommend another turbo for similar applications to the 20G?

Thanks!

Based on a TD05 from memory and will make more power :)

https://www.scoobynet.com/subaru-par...c46-turbo.html

Why not talk to Engine Tuner about this? To be honest, there are much better turbos about now than the TD05-20G unit.

IS this all going into your WRX on the original WRX running gear?

That was going to be my question also.

Thanks for the suggestions, that turbo is going for a great price! Engine needs a rebuild (possibly my piston rings are on their way out, or stem seals, smokes a bit on idle) and its almost at 90k miles, so bearings etc could do with a change (apparently crankshaft could do with a swap as this mileage too).

Been doing allot of research and come to the conclusion that if i'm taking the engine apart it would be stupid not to forge it, and it i'm forging it then it would be pointless not to have a stroker setup put in as i'd be replacing all the same components anyway.

I dont want to run high power, maximum 350bhp really hence why i havent looked at the sc46 as it would be too laggy with the lower PSI i'd be using. Mainly doing it for strength and longevity, as well as helping with low down torque.

Planning on getting a blast plate for the gearbox to strengthen it a bit too (are these just a money grabbing gimmick or do they actually help?).

For 350 just get yourself a VF35, it will probably make a little under that, but for 300 quidish you cant go wrong!

sod the td05, turbos have moved on about 300 generations since they were around.

and who said to swap the crank cos of the mileage?

Alright thanks i'll take a look into VF35's, i thought they were prone to case cracking and seals blowing, and i thought TD turbos were meant to be very strong. But will look into it even more! Cheers!

Turbo tech has moved on massively in the past several years and has to be said the car manufacturers are way behind the specialist in term of turbo performance.

The VF35 is the standard STI turbo, so isn't that a bit outdated and inefficient too then? Would it hold boost all the way up to 7.2k rpm? Other concern about VF35 was that i've been told (please correct me if i am wrong) that you can't rebuild them if they go wrong or put a billet compressor in them?

Don't judge me (lol) currently have a Chinese TBO TD05 16g that i need to replace (still fine but its a ticking time bomb) and that starts boosting at about 3k and holds boost all the way up to 7.2 which was a really nice improvement from the TD04 loosing all guts at about 5-5.5k!

Most of the specialist turbos seem to be aimed at much higher power levels than i'm looking for which is making the search somewhat harder.

VF series is off the new age sti's so is newer than the td series, its really dependant on your budget. An SC36 will do pretty much bang on what your aiming for and easily outspool any of the previously mentioned turbos, problem is you are unlikley to find one second hand so will have to buy new so be considerably more expensive. That said if your having a rebuild then why try and cut corners

Ohh now that SC36 does look ideal for me! Will look into that aswell, if theres no 2nd hand ones will just have to save some more pennies!
Spot on for your advice mate, appreciated.

no probs :)

You can now buy billet wheels for the VF range of turbo's too. Though not widely available here in the UK yet, you can get them. I agree with the above comments, the TD range is older and the VF range would be a better choice IMO too. The VF35 is better suited to the 2.0 so that would still be my choice for the best driving combination. You'll end up with a very laggy horrible driving car if you go too large like the TD05 unit.

Always remember the turbo general rule: Use the smallest possible turbo to achieve your power goal. This will make the lag as little as possible for that power range and make the car drive as well as possible in the real world.

Also, your suggestion about the gearbox strengthening "blast plate" won't be any good I suspect. It'll still blow the gearbox apart sooner or later at 350bhp. If you upgrade to a later hawk 5 speed box then it will last longer, but not indefinitely.

I don't mind a bit of lag to be honest, i like being able to drive casually without hitting boost, but then when i really want to go for it the power is there all the way up to rev limit. But would much rather now go for a VF of SC after all your comments anyway!

Shame about the blast plate, i heard that it was the torque that distresses (and stretches / twists) the gearbox casing which makes the gears not mesh properly, causing them to strip under high load. The blast plate is designed to solidify the gearbox so that doesn't happen, allowing it to take more power, makes sense but shame to hear you don't think it'll make any difference. Anybody had any experience with one?

Never thought about a hawk 5 speed, i'll try and find one of those cheers!

There is mixed thoughts at the moment whether the blast plates do any good as it's difficult to prove the theory. The gear teeth on the later hawk 5 speed are slightly bigger so can handle a little more power. That said, you'll still pay a fair bit for a hawk 5 speed so in the long run you may want to consider £1500 to buy a 6 speed kit.

This is the problem you now have with increasing engine power. You'll be putting the other bits under more stress and other bits will start breaking.

Are you upgrading your brakes?

Have you costed up just how much all the essential upgrades (engine/clutch/brakes/possibly gearbox) are likely to cost you? Is it not worth considering selling up and buying an STI?

you can buy rebuild kits and also buy a new chra catridge for vf series turbos which is a brand new core so like new again : http://www.ebay.co.uk/itm/2623161343...MakeTrack=true

i have a vf48 on my wrx made 320 on the rolling road.
the turbo,pink injectors,Harvey Smith uppipe ported headers sti tmic will be for sale next month.

Trust me i've argued with myself long and hard about selling it and just buying an STI. :lol1: Due to my age, insurance for me would also be cheaper on a modified WRX than an STI!

An STI in the condition my WRX is in would cost as much as everything i need to do to mine. By modifying my WRX i'll have a freshly built engine from enginetuner on 0 miles, new turbo (if i go sc36 or VF with that new core yabbadoo4 has recommended, thanks for pointing that out).

I have a Civic Coupe as a daily at the moment so my scooby isn't actually on the road so i can afford to build it up gradually over time.

Brakes are essential, as the WRX ones are completely rubbish even for the power it has standard.

I had a little read on the hawk gearbox and might be hard to find the right one, apparently they have a different sort of clutch arrangement?

Plus my WRX isn't worth much at the moment, my reverse gear is broken and its smoking a bit so is worth more to me to fix than to flog on for pennies.

Dave Y - thanks for letting me know, i have all those other bits unfitted already but will keep an eye out for the turbo :)

Don't underestimate how much you will spend making a WRX better or making a WRX into something like an STI. I still have my hawk WRX and so far my upgrade bill has touched £10k WITHOUT cost of the original car, servicing costs, an engine build or gearbox upgrade. It really adds up. I'm just saying it's worth taking a minute to add it all up properly, so you're not left out of pocket with a partially upgraded car.

my car goes off the road end of April if you are still looking then let me know.

i know the feeling have a read of my project.The secret is dont save the invoices.Next on my list is a 2.1 forged build.

LOL. I know your build Dave, you haven't held back! haha.

I've now got 2 subarus I'm spending money on, so it's twice as bad now! :)

I know it'll probably end up costing me more, however i do enjoy working on cars and the pride you feel from accomplishing things (i'm sure you guys do too!).

For me i'd rather look at the car and know what went into it, knowing the time and effort i put into it, rather than look at something i just went and handed over 10k for and leave as it is. If i had the money outright or could see myself getting that much all at once i'd consider it, but i can't, so its going to be a long WRX upgrade!!

Cool. Me too! That's why I own a poverty spec WRX upgraded to my liking! :D

The only poverty spec wrx on the forum is rs_matt's lol

:lol1::lol1::lol1:

5 speed boxes have seen great power, and some less than 350 so it's just pick of the mill with 5 speeds IMO.
Past life, driver habits etc take their toll.
But at 350hp I wouldn't personally be paying for a 6 speed unless it broke. But if folk want to spend 1500-2k on one just to feel at ease then, it's your money.
It's only a car, if it breaks, it breaks.

I agree, personally I'd only change it once it's broken. Trouble is, on an older type used box that may not be too long at the power level the OP wants.

I did buy another gearbox from somebody on here to replace mine, was a 754 but when he took it out of the car turned out it was knackered, so he sent me another one he had taken out of a different car. It arrived and i put it into storage, stupidly didn't look at it for a few months and when i eventually did it turned out it was a 752.. so not going to be using that one!

I'll get the reverse gear fixed on mine, put a blast plate on it and see how long it lasts, if it blows i'll invest in a 6 speed. I much prefer ratios in 5 speed boxes but not the end of the world if i have to upgrade.

"Poverty spec" aha.. true i guess but i'll enjoy boosting past standard STi's when my build is finished even more then! :lol1: