[Jacksheps]

You could get that done if u cracked on bud! Forget the stupid things like 'paint cage'

 

[alexevans]

You could get that done if u cracked on bud! Forget the stupid things like 'paint cage'

I dont know, its the weather fucking it all up. So bloody windy I cant have my canopy out, so shit gets wet.

Currently trying to sort a programme of works out, bloody Uni work as well means I have bugger all time.

 

[Jacksheps]

Yea good point weather doesn't help!

 

[alexevans]

Not much to report today, turbo fully bolted down to manifold now with hi-temp gasket sealent.

Also fully installed the MBC, not really intending to use it to up boost massively, more as a check to reduce creep;

 

[alexevans]

Just figured out I have a T25G turbo (bought it not knowing what that was), and my said Saturday night Interweb trawlings have found a 'G' has a bigger compressor housing over the standard T25. Apparently an inbetween of the T25 and T28.

Happy days

 

[towelie]

I've been doing some reading up on them aswell recently and from what I can work out most aren't ball bearing, only some are. so you may be lucky, but it may also just be journal bearing!

When are you going to make it to a dyno? I'm interested to see what you get out of that turbo! I found some specs on that turbo somewhere and it seems to have the same dimensions an a/r's etc as a gt2554r. which according to flyin miata's website will make 200rwhp, so approx 220 at the fly(not bad).

I have the option of either a t25g or a t28, think I've decided to just go straight for the t28, go big or go home !

 

[alexevans]

I've been doing some reading up on them aswell recently and from what I can work out most aren't ball bearing, only some are. so you may be lucky, but it may also just be journal bearing!

When are you going to make it to a dyno? I'm interested to see what you get out of that turbo! I found some specs on that turbo somewhere and it seems to have the same dimensions an a/r's etc as a gt2554r. which according to flyin miata's website will make 200rwhp, so approx 220 at the fly(not bad).

I have the option of either a t25g or a t28, think I've decided to just go straight for the t28, go big or go home !

After further interweb reading I also found out not all are BB, bit of a jumped up all happy about the original finding. Thinking we have been reading the same info.

Not sure on the dyno, I have all intentions to get on one and do it correctly, but I am intending to upgrade the injectors to something bigger so dont really want to do it again within quick succession. But if I'm achieving 200+ whp, clutch and diff will not last long at all.

Nice T28 should push past the 200 with some decent injectors, not going to find it to laggy though?

 

[Driftmonkey]

The t28 thing is something I wonder about.
One of my friends had a t25g hks kit on his mk1 1.8, only home mapped to 10psi and it wasn't impressive, then he swapped to cooks old set up gt2560r(I think) with full 2.5" system and home mapped that wasn't impressive, wasn't until after it was set up on the rolling road that it became a quick car.
But it doesn't come in that low down.

Another friend with mk1 1.6 is going cast t3 manifold with t3-t2 adapter(made by me) to t28 off a nissan sunny gtir to a downpipe adapter(I've nearly finished it) but I'm predicting it will be laggy.

 

[alexevans]

The t28 thing is something I wonder about.
One of my friends had a t25g hks kit on his mk1 1.8, only home mapped to 10psi and it wasn't impressive, then he swapped to cooks old set up gt2560r(I think) with full 2.5" system and home mapped that wasn't impressive, wasn't until after it was set up on the rolling road that it became a quick car.
But it doesn't come in that low down.

Another friend with mk1 1.6 is going cast t3 manifold with t3-t2 adapter(made by me) to t28 off a nissan sunny gtir to a downpipe adapter(I've nearly finished it) but I'm predicting it will be laggy.

What wasn't impressive the power output or delivery?

 

[Driftmonkey]

Both, I'm guessing it was to do with the timing being super safe, and only running them on wastegate until he had it mapped with the boost controller.
When he first fitted the hks kit, my mk1.6 wasn't struggling to keep up.
And the last time we went out for a drive and swapped cars, his is quick, loads quicker, devastatingly quicker, but mine is instant power, and like all turbo cars if your not at high enough rpm your cursing for being in the wrong gear.
I always argue mine is better as it has no powersteering and is a proper drivers car.....
Well you have to say something when his car is better in every other way.

 

[towelie]

Lag with the T28 is something I'm worried about and ideally I'd go for a gt2560r which is the bb version of the t28, but I can't justify ~£600 on a new turbo.

I did consider getting an s15 t28r, but I'm worried about it bec oming an expensive paper weight as you can't rebuild a bb turbo!

My curent setup uses a td04-9b which is tiny so response is very good, but it doesn't have massive top end. I use the car for track so I think it'll be fine to have a bit of lag to gain loads of top end.

Also I think most of the threads which bemoan lag on a t28 it could be caused by other factors, like not running electronic boost control. The difference in response between running wastegate pressure then setting up the megasquirts closed loop boost control was awesome!

I was having a chat with chris at EFI-parts, and he reckoned that ball bearing turbos weren't as great as everyone makes out. He said the difference in reaching your boost threshold isn't massive. He said the only place where I'll notice it is on the transient response, so if coming out of a corner I'm on the throttle, then come off, then go back on again... time will tell.

I believe the gtir t28 uses a 0.86 a/r turbine vs 0.64(s14 t28)? I think that could be a lag monster! only difference between the t25g an t28 is the compressor.. How much worse can it be !

Ultimately if it is a lag monster and I don't like it, I can swap back to the old turbo kit!

 

[Sketchy]

But if I'm achieving 200+ whp, clutch and diff will not last long at all.

What diff you running pal? Yetidragon has been putting just shy of 270hp through his Torsen and it still works!
(although yes, your clutch will take a shit!)

 

[towelie]

But if I'm achieving 200+ whp, clutch and diff will not last long at all.

What diff you running pal? Yetidragon has been putting just shy of 270hp through his Torsen and it still works!
(although yes, your clutch will take a shit!)

Yeah forgot to mention, that I catestrophically exploded my 1.6 friction plate at ~180hp... hardish 1st to 2nd gear full of fuel and packed full of bags kaboom!

Changed the clutch an a month later my diff started behaving strangely and then some nice knocking noises from it!

Budget to change both!

 

[Driftmonkey]

Dead diff at only 180bhp, ah bugger, was hoping not having to change mine.
Yeah the t28 car is only a track toy, and that was his argument, it won't matter as will be driving it hard and keeping it in the right rev range. Whilst I think as he's not going forged he will only be able to go to 250bhp so will be a waste.
I keep trying to get one of my friends to sell me the t25g he has(he bought it off my mate) but wants to keep it with the hks manifold.
He's decided he wants a td05 of an evo fq wotsit and go forged.
By then I could of built 3 budget turbo builds and done loads of track days.

 

[towelie]

Dead diff at only 180bhp, ah bugger, was hoping not having to change mine.
Yeah the t28 car is only a track toy, and that was his argument, it won't matter as will be driving it hard and keeping it in the right rev range. Whilst I think as he's not going forged he will only be able to go to 250bhp so will be a waste.
I keep trying to get one of my friends to sell me the t25g he has(he bought it off my mate) but wants to keep it with the hks manifold.
He's decided he wants a td05 of an evo fq wotsit and go forged.
By then I could of built 3 budget turbo builds and done loads of track days.

I can give you the details of a guy on driftworks who is trying to sell me a t25G if you want.. although he wants £160 posted to the wirral!

I know what you mean about it possibly being a waste as I won't be forged. Having said that the stock turbo on an fm2 is the gt2560r, which is the same spec as a nissan s14a t28 and it makes 230 whp at 12 psi. I know you can push it harder an break the rods, but I think 230whp will be more than enough.

Adding power is a vicious circle! you add the power then the brakes aren't up to it, then the tyres are the limiting factor so you make them bigger/wider, then you have too much grip, so you add more power and the circle keeps going!

The setup atm with the 1.8 torsen, 1.8 brakes/yellowstuff, 15" michelin pe2s an meisterrs works well together, but i still has buckets of grip in hand

 

[alexevans]

But if I'm achieving 200+ whp, clutch and diff will not last long at all.

What diff you running pal? Yetidragon has been putting just shy of 270hp through his Torsen and it still works!
(although yes, your clutch will take a shit!)

Some interesting comments there, and as per usual has placed more onto my forecast budget. But I know the diff would need doing anyway.

Currently im running a 1.6 VLSD welded, and an OEM level Exedy clutch which may last better than the 20 year old original???

 

[Driftmonkey]

I'm going to be hopefully doing a group buy on uprated clutch plates in a month or so, it won't be a big group as they turn into a nightmare, probably only 5, you will need a 1.8 flywheel and cover but I bet JYD has them in stock.

 

[alexevans]

So today has been a good one, got a couple things off my list to do.

A bit of Driftmonkey Fabrication Ltd on my car, one VTPS in place.

A bit of general maintenance on the car, cleaned out the hood drain pipes. I hate being under my car, lets me see how rusted it has got since I last welded it up .

My main goal for the today was to fabricate my exhaust, 2.5" mild steel mounted to a 6" back box with a 4" tip.

To start I welded a new flange to the downpipe as I am using a 3 bolt type, not the best of welding but it was the morning.

The start of the exhaust, checking its level and good to go.

See I can weld.

A few tools of the day.

I had a problem with the pipe bender as I didn't have the correct size die, which causes the tube to crush and oval out. So I had to cut a slot, and then heat it up prior to bending.

There we go welded back up, also I cut the mounts off the original exhaust and re-used on this one.

This shows the bend, I had 2 on this length in different directions, and 1 on the cross over pipe.

I spent a lot of time making sure it wasn't to low, as I didn't want it crashing into everything.

This shows the cross over pipe, photos makes it look crap for some reason.

This is the can mounted on its own weight, I used the stainless wrap around straps you can buy.

By this time it was getting dark and my photos went to shit. But its done :banana: one exhaust system, I will add some extra photos went its light.

 

[alexevans]

I'm going to be hopefully doing a group buy on uprated clutch plates in a month or so, it won't be a big group as they turn into a nightmare, probably only 5, you will need a 1.8 flywheel and cover but I bet JYD has them in stock.

Cheers bud, I should be keen for one.

 

[Fizbne]

THAT EXHAUST MUST BE LOUD.