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Nice to see another wagon project. What turbo are you going for? Not concerned about the Ringlands crapping out on the 2.5?
Hello mate,
I am REALLY worried about the ringlands. I've had a compression test and the engine is really healthy, and measured 140psi.
Now i know the engine is good, i plan to not run more than 1.2 bar of boost to protect the engine and ringlands.
Although, i have seen posts where people and mappers are saying its safe to run more than 1.2 bar. But i think i will just stick to 1.2 bar :-)
I actually have a td04 hybrid and a harvey smith td05 18g, and debating about which one to fit! I'm leaning towards the 18g and running it up to a max of 1.2 bar.
But, i'm wondering if the td04 hybrid will be better since i'm only wanting to go up to 1.2 bar?
I'm after a quick road car.
But, i'm concentrating on sorting the suspension and brakes out first.
Bought some used, but nearly new BC coilovers :-) They came with 6kg springs at the front and 5kg for the back.
So I bought some new 5kg springs for the front, and 4kg for the rear. I had this set up before, and found it to be just what i needed for the crap roads in London, improves handling, and still very comfortable without being crashy :-)
I have reconditioned rear STI Brembos, with larger disks, and Godspeed handbrake inserts that are going on too :-) I've had these before, and they make a big difference when upgrading the front brakes.
Last edited by Reshard1977; Nov 12, 2015 at 02:35 PM.
Purely by accident i came across someone selling a Harvey Smith TD05 18g, and bought it!
Now, i'm trying to figure out which turbo will be better for a quick street car, i dont really go over 70, so dont need lots of top end power. I also want to keep boost at 1.2 bar to keep everything safe!
I was always told to keep the boost below 1.35bar on a std 2.5 lump. Which is excatly what mine is mapped at. I wouldn't worry too much about engine failure. Just enjoy it and keep it well serviced!
Personally I wouldn't bother with the ported TD04 (although it looks lovely) as it will only just push 300bhp still at best. The spool will be amazing though so will make a good car for the road. I'd still go fo rthe Harvey 18g personally. That will spool very well and they have been seens to get as much as 360bhp with the right combo of parts.
Last edited by BrownPantsRacing; Nov 12, 2015 at 02:55 PM.
I was always told to keep the boost below 1.35bar on a std 2.5 lump. Which is excatly what mine is mapped at. I wouldn't worry too much about engine failure. Just enjoy it and keep it well serviced!
Personally I wouldn't bother with the ported TD04 (although it looks lovely) as it will only just push 300bhp still at best. The spool will be amazing though so will make a good car for the road. I'd still go fo rthe Harvey 18g personally. That will spool very well and they have been seens to get as much as 360bhp with the right combo of parts.
Hi there,
how long have you had yours mapped at 1.35 bar for? Do you mind if I asked who mapped yours?
I'm booked in for a map with Bob Rawle for late Dec. I'll say that i dont really want to go over 1.2 bar, but will let him decide what is safe, since he's the expert and has a really good reputation.
I'm leaning towards the Harvey 18g to be honest, but still not 100% sure, purely because its not often that I get to 70 or 80, so looking for the best turbo for low down torque and driveability.
I had quite a few people confirm to me that 1.35bar is the max really for the 2.5 lump in standard form, including Banny, Duncan and a few others on here.
Duncan mapped my car 4.5 years now. My Hawk WRX has done 71k total now and 30k with the upgrade parts running 334/381 very happily indeed. I've got a VF48 fitted with the usual additional bolt on parts like cobra sports cat downpipe, STI intercooler & under tray, 3 port, K&N panel filter, NGK heat 7 plugs, with a few other minor bits.
In my opinion the 18G will still give you more power and pull to get the car to 70mph with only minimal effect on the lag over the TD04. I can try dig my boost graph out if that's any help?
I had quite a few people confirm to me that 1.35bar is the max really for the 2.5 lump in standard form, including Banny, Duncan and a few others on here.
Duncan mapped my car 4.5 years now. My Hawk WRX has done 71k total now and 30k with the upgrade parts running 334/381 very happily indeed. I've got a VF48 fitted with the usual additional bolt on parts like cobra sports cat downpipe, STI intercooler & under tray, 3 port, K&N panel filter, NGK heat 7 plugs, with a few other minor bits.
In my opinion the 18G will still give you more power and pull to get the car to 70mph with only minimal effect on the lag over the TD04. I can try dig my boost graph out if that's any help?
I'm going to speak to Bob Rawle about the safe max boost for a std 2.5 hawk, from what you have said i strongly suspect he will say the same, that 1.35 bar is the max. But i'll leave it to him to decide, and remind him that i want it to be safe :-)
Mate, that would be really great if i could see your graph, maybe you could post it up here, then i'll post my graph when i eventually get to a RR.
Cheers for all the information, really really appreciated
I'd imagine my 18g would be similar in delivery and power, so i'm definitely going to go with the 18g :-)
Did you have an aftermarket up pipe on to reach those numbers?
I've got all the other mods you mentioned too ;-) I'm just not sure if the up pipe will be worth the outlay since the Hawk WRX OEM up pipe doesnt have a cat in it.
I still have the standard hawk headers and std up-pipe. The standard headers are very good indeed and various tests have shown them to flow very well. Some people have even noticed power drops when fitting aftermarket tubular headers.
No point changing the up-pipe either as there is no CAT in the hawk up pipe as there was on earlier WRX models.
I still have the standard hawk headers and std up-pipe. The standard headers are very good indeed and various tests have shown them to flow very well. Some people have even noticed power drops when fitting aftermarket tubular headers.
No point changing the up-pipe either as there is no CAT in the hawk up pipe as there was on earlier WRX models.
Thanks again for sharing your experiences!
Do you think a Harvey Smith Trick up pipe from AS Performance would be a worthwhile upgrade, to bring boost in sooner?
The TD04 is always going to pick up quicker and lower down the rev range, it may run out of puff higher up but if you're not interested in top end then that's immaterial.
The Harvey up-pipe will also aid spool so maybe go for one of those too, even more so if you decide to go for the 18G.
Last edited by ditchmyster; Nov 15, 2015 at 10:35 AM.
I still have the standard hawk headers and std up-pipe. The standard headers are very good indeed and various tests have shown them to flow very well. Some people have even noticed power drops when fitting aftermarket tubular headers.
No point changing the up-pipe either as there is no CAT in the hawk up pipe as there was on earlier WRX models.
Out of interest I'df there is no cat in the up pipe how many are there in the main system? I've got a blobeye with PPP (just one cat in the main exhaust), and debating fitting a de cat up-pipe so I've been wondering how that will work out at MOT time?
Very nice wagon by the way.
The TD04 is always going to pick up quicker and lower down the rev range, it may run out of puff higher up but if you're not interested in top end then that's immaterial.
The Harvey up-pipe will also aid spool so maybe go for one of those too, even more so if you decide to go for the 18G.
Cheers for the feedback.
I'm now leaning more towards the TD04 Hybrid again.
Think i'm going to stick it on, get it mapped and see how it goes :-)
Out of interest I'df there is no cat in the up pipe how many are there in the main system? I've got a blobeye with PPP (just one cat in the main exhaust), and debating fitting a de cat up-pipe so I've been wondering how that will work out at MOT time?
Very nice wagon by the way.
You can get away on MOT day with just 1 cat in place, the OEM cat in the downpipe, or a sports cat. If you go full decat you will have to find a friendly MOT guy, and normally have to give him a little drink money.
On my last 2 scoobies, i went STI PPP sports cat, gets through MOT fine, and has minimal loss in power. Only thing is, they are quite hard to come by.
I've decided to box up and store the Harvey Smith TD05 18g. If i get bored of the TD04 Hybrid 19t wheel (only 4mm smaller than the 18g, but its billet!) then i'll fit the 18g and see how that goes ;-)
Here is the Harvey smith 18G, looks mint! no play in the wheel at all, doesnt look like its been used much at all.
Out of interest I'df there is no cat in the up pipe how many are there in the main system? I've got a blobeye with PPP (just one cat in the main exhaust), and debating fitting a de cat up-pipe so I've been wondering how that will work out at MOT time?
Very nice wagon by the way.
The standard Hawk WRX doesn't have a cat in the up pipe, but it does still have 2 in the exhaust. One in the downpipe and one just after. As said above, you could replace the secondary and still pass MOTs with the downpipe CAT in theory. I just replaced the lot with a sports CAT downpipe. Much better.
I'm now leaning more towards the TD04 Hybrid again.
Think i'm going to stick it on, get it mapped and see how it goes :-)
It's the one I'd go for too as I prefer spool to top end and very rarely go over 100mph, so for me it's all about how I get there and mid range response without thrashing the pants off my engine.
I'll be really interested to see your graphs when it's all mapped up so don't forget to post them.
It's the one I'd go for too as I prefer spool to top end and very rarely go over 100mph, so for me it's all about how I get there and mid range response without thrashing the pants off my engine.
I'll be really interested to see your graphs when it's all mapped up so don't forget to post them.
I'm exactly the same, its a road car, so top end is not so important.
I've booked an open source road map with Bob Rawle, for Dec 22. I'll probably get the chance to get a RR graph in Jan. I'll post up the graph once i have it :-)
Bolt snapped in the ball joint, so the mechanic has to get that out before fitting the ally wishbones.
I have braided brake lines waiting to go on too. But the OEM brake lines are a little rusty, so the mechanic is taking his time with them, and using lots of WD40 on them. Cant wait for the suspension and brake set up to be finished!! :-)
Last edited by Reshard1977; Jan 9, 2016 at 01:15 AM.
Hawkeye Wagon project!
