Race Car Update...

[Turbocoupe75]

Yep thought I would chuck up a few photos of the gunna setup for the race car...

So it's a D1 / E1 head EFI, VN throttle body with T28 water air intercooler and a very short intake path after I fabricate a 110 degree elbow.

Once the blocks back together some bigger injectors and sort out a ECU.
- next incarnation will be flat top pistons, closed chamber head and a T03 or GT series turbo.

Comments / critique are welcome as I still haven't worked out if I need a BOV or where to put it.

Cheers

[F3ARED]

Ive honestly never used a BOV, and never had any mechanical failures relating to a turbo. Fit one if you want, but personally i think they are a waste of time. If you had to fit one i think your only option would be on the alloy bend/elbow joining turbo to intercooler.

What bottom end are you using this thing on, and dont you have to use a restrictor to stay within IPRA rules?

[Jonno]

Cool!
Should update the build thread.

[Turbocoupe75]

Ive honestly never used a BOV, and never had any mechanical failures relating to a turbo. Fit one if you want, but personally i think they are a waste of time. If you had to fit one i think your only option would be on the alloy bend/elbow joining turbo to intercooler.

What bottom end are you using this thing on, and dont you have to use a restrictor to stay within IPRA rules?

D1 bottom end. Bit of a waste going 2.6 with a restrictor, which will be fitted when the car and driver are ready for some track time.

As for the BOV, after much internet exploring I am not going to use one, people who sell them have profit to make so they tell you there essential, but from what ive read mechanical failure is only an issue on high boost or larger turbos, ( impeller size stress would be proportionally greater with a diameter increase in the compressor wheel when it comes to compressor surge or stalling).
With a Restrictor it's unlikely I will make over 16-18psi at full noise.

[F3ARED]

Personally i think the whole thing is a bit bulls*#t. Put your finger through the impeller at 18psi, will your finger slow the impeller down? Didnt think so. lol Most modern turbos, OEM or otherwise, of reputable manufacture, have enough R&D behind them that this sort of thing wont phase them in the slightest.

While i remember, looking at your fuel rail - RB26 GTR injectors are a drop in swap.

[DR_GEM]

Agree re bov - infact in my experience you're introducing another potential failure point (for compressor surge / boost leaks)

One critique I have- piss off the t28 and don't even think about a t03. These turbos are so dinosaur you could make some oil if you covered them in dirt for a few nights.

Get a proper huffer - this and your head is where you make power.

Mick

[Jonno]

One critique I have- piss off the t28 and don't even think about a t03. These turbos are so dinosaur you could make some oil if you covered them in dirt for a few nights.
Get a proper huffer - this and your head is where you make power.
Mick

Lol I did think this but didn't want to say anything incase that's a requirement of his race class?

[DR_GEM]

Good point I didn't consider that but ipra rules aren't that restrictive

If it's a cost thing, grab a holset hx35 or borg warner s256 and be done with it
Mick

[Turbocoupe75]

Good point I didn't consider that but ipra rules aren't that restrictive

If it's a cost thing, grab a holset hx35 or borg warner s256 and be done with it
Mick

Ha, the T28 is "NEW" I bought it in 2008.... never used I can use any turbo that I want but will still need a restrictior to keep it IP Legal.
Plan is to get it going the change over to a larger item, this is a budget build for now but with a bit more power it will be great for hill climbing.

The RB26 injectors seem like a good choice, theres also a Mazda 13B 550cc option as well, hopefully there E85 compatible.

As for a larger Turbo I have NFI what would be suitable.

Cheers

[DR_GEM]

Fair enough

If it's a Garrett t28 ball bearing (so many variants of a t28 so would be good to know what specifically it is) then that's ok

I Have a spare set of 13b 550cc injectors you can have cheap if you like. They need new seals and pintles but they're pretty cheap to get

Mick

[DR_GEM]

Also happy to assist with turbo selection - tell me your restrictions and objectives and I will provide some guidance

[Turbocoupe75]

It's a bush bearing Garrett T28, was going on a draw through set up....
I'll let you know about the injectors in a couple of months..

Cheers

[DR_GEM]

Oh draw through - that changes things. I would stick to the t28 for now until you convert to injected.

[Turbocoupe75]

Nononono

Was.... once upon a time the t28 was going on a draw though setup, not anymore!! I'm much wiser now and it's going on the E1/d1 with injection and the water air intercooler.
I even had a carbon seal done... it will get me going for now.

[DR_GEM]

Ok that's good- do you know what type of t28 it is? Front wheel dimensions? Rear housing? Is it an ns111 turbine wheel or old school 28 t series turbine?

From there we can determine a few other things