Pre Build 998 Turbo Build ?'s 7 port head, stock internals
Turbo Mini Forums

Well, different RRs. But I know the clan ran on the RRs I ran the 7port on and both went on the Smart roller (when I had 5 ports), so I have comparable results with the same spec to make a reasonable comparison. also compares to other RRs I have used and got similar figures.

Also, significantly faster terminals at numerous events and I ran out of gears for the first time at a drag event. at Harewood I needed 4th for the firt time where we were hardly on the rev limit in 3rd before.

finally, there is a 'fudge' factor in there to compensate for a known value.

The car is a revalation on the 7-port, had I the money I'd have one on every car.

Edited by wil_h on 1st May, 2012.

Fastest 998 mini in the world? 13.05 1/4 mile 106mph

www.twin-turbo.co.uk

I don't doubt that it is doing around 20hp more, but surely half of that is attributable to extra boost.

Injection, done properly, will vastly improve the driveability of any engine.

Edited by Paul S on 1st May, 2012.

Saul Bellow - "A great deal of intelligence can be invested in ignorance when the need for illusion is deep."
Stephen Hawking - "The greatest enemy of knowledge is not ignorance, it is the illusion of knowledge."

Boost was 15psi on both engines with the stated gain. anything above that was extra boost.

Fastest 998 mini in the world? 13.05 1/4 mile 106mph

www.twin-turbo.co.uk

So we're talking marketing hyperbole again?

Saul Bellow - "A great deal of intelligence can be invested in ignorance when the need for illusion is deep."
Stephen Hawking - "The greatest enemy of knowledge is not ignorance, it is the illusion of knowledge."

Here's what's bothering me about these claims.

The TT2 5 Port was one of the best developed engines on this forum. The SOT & VE equalled the best, including the 16v K & KAD headed engines.

Add another 20hp and the SOT & VE values go out the roof into the realms of unbelievable.

Just so you know why I'm being a grumpy git.

Saul Bellow - "A great deal of intelligence can be invested in ignorance when the need for illusion is deep."
Stephen Hawking - "The greatest enemy of knowledge is not ignorance, it is the illusion of knowledge."

smirk

I don't think that it is all head. Lots of things changed during Wil's build. A new, and arguably better, intercooler for one. I think the fueling is much much better, it runs leaner and safer, hence the gains lower down. But there are so many little difference that need to be considered. The piping from turbo to throttle body involved less bends, the lack of the restrictor ring in the plenum, etc, etc. Yes the head is significant, but Paul you are probably right, not worth 20hp all on its own.

http://www.twin-turbo.co.uk
http://www.hillclimbandsprint.co.uk/default.asp

A man without a project is like a like a woman without a shopping list.

Very true :)

Saul Bellow - "A great deal of intelligence can be invested in ignorance when the need for illusion is deep."
Stephen Hawking - "The greatest enemy of knowledge is not ignorance, it is the illusion of knowledge."

Ok im ordering my head but i need to know the stock/standard oem piston bowl/dish size for a 998? Or does anyone have a suggestion or know what chamber size to run, i was thinking 9.5-10:1 compression. Did a quick search but only came up with aftermarket stuff

-1974 Mini 1000 - BRG Turbo Build Soon to come

-04.5 LLY Duramax - RC/LB - White - Built Trans - EFILive - Dropped 4/6

-2013 TDI Passat - SEL - White - Lowered on Coilovers - Daily Driver

-2003 Silverado SS - 408 Stroker - DP NO2 - Full Suspension ~900hp For Sale

Standard 998 is around 24, the open-chamber 295 head is 28cc.

Typical 998 piston dish is 6cc.

Fastest 998 mini in the world? 13.05 1/4 mile 106mph

www.twin-turbo.co.uk

Thanks wil, they are saying the last one they did for a 998 and boost was a 24cc chamber and I'm guessing it had forged parts b/c it made 170hp. This way I'll have room to grow for forged parts in the future. Any idea of what stock compression was on a 998?

-1974 Mini 1000 - BRG Turbo Build Soon to come

-04.5 LLY Duramax - RC/LB - White - Built Trans - EFILive - Dropped 4/6

-2013 TDI Passat - SEL - White - Lowered on Coilovers - Daily Driver

-2003 Silverado SS - 408 Stroker - DP NO2 - Full Suspension ~900hp For Sale

a series with dished pistons is 8.3:1 according to the haynes, later a plus with flat top pistons is 10.3:1

i think the one that produced 170bhp is wil_h's mini.

Edited by wez on 8th May, 2012.

one day boost will be mine!

Med are doing some nice forged pistons now for the 998 if you have the money !
See here: http://www.turbominis.co.uk/forums/index.php?p=vt&tid=467010

Might be wrong, but isn't Will_h''s mini running a reasonably standard bottom end?

Yep, if it's SC you are talking to, then he's on about my car. 24cc chambers, cast pistons.

Fastest 998 mini in the world? 13.05 1/4 mile 106mph

www.twin-turbo.co.uk

Yep SC, so what compression are you at then? Since its a daily driver i really didnt want to be lower than 9.5 but if its 8.3 as it sits then low 9's or high 8's :1 might not be so bad. Im going to be running a t15 Charger so i dont think spooling will be much of an issue

-1974 Mini 1000 - BRG Turbo Build Soon to come

-04.5 LLY Duramax - RC/LB - White - Built Trans - EFILive - Dropped 4/6

-2013 TDI Passat - SEL - White - Lowered on Coilovers - Daily Driver

-2003 Silverado SS - 408 Stroker - DP NO2 - Full Suspension ~900hp For Sale

I run 8.5 ish (I can't 100% remember without looking at my notes, it's changed over the years).

But 9.5 will be good on a daily. You won't be running the boost I run on mine. My daily 998 turbo with a 5-port head runs close to 9:1.

Fastest 998 mini in the world? 13.05 1/4 mile 106mph

www.twin-turbo.co.uk

OK well it looks like i will only be able to get down to about 8.8 with their standard 22cc chamber. Maybe i can deck it some, if not a couple extra pounds of boost can make up for it

-1974 Mini 1000 - BRG Turbo Build Soon to come

-04.5 LLY Duramax - RC/LB - White - Built Trans - EFILive - Dropped 4/6

-2013 TDI Passat - SEL - White - Lowered on Coilovers - Daily Driver

-2003 Silverado SS - 408 Stroker - DP NO2 - Full Suspension ~900hp For Sale

Ok my turbo arrived but is it really big enough? Its a GT15 from cxracing. I went this route because it was well priced and some of you had suggested a gt15 of some kind. Its almost identical to a GT1544 from garret and here is just some comparison pictures. These are turbos that im use to and may be the reason why i feel its to small.

Next to a coke can


From left to right is my GT15 then a t76 and then a PT88, we use the 76's for twin setups and the PT88 is a really small single setup. Normally we run 90+mm turbos for a single

-1974 Mini 1000 - BRG Turbo Build Soon to come

-04.5 LLY Duramax - RC/LB - White - Built Trans - EFILive - Dropped 4/6

-2013 TDI Passat - SEL - White - Lowered on Coilovers - Daily Driver

-2003 Silverado SS - 408 Stroker - DP NO2 - Full Suspension ~900hp For Sale

Hi 408;
You plan are very interesting, and'll certainly a nice smooth rocket on the road.
Be aware you just bought a china pig as a turbocharger... Don't use this one, send it back as soon as you can.
U have a lot of turbo-options these days, look closely at turbine designs and match closely your compresor to YOUR specs.

regards

How can you tell it's chinese Fab?

It may look small, but it will pump as much air as you need.

Fastest 998 mini in the world? 13.05 1/4 mile 106mph

www.twin-turbo.co.uk

Garrett units all have garret specs etc mouled in the housing casting. look at it precisely this one is a fake.

I know a gt15 will moove plenty of air, kkk have grone a lot with their associassion with borg warner industrie, and their latest developpement are gooood.

Oh i know its a fake, but for $200 new i think its worth a shot. I also dont think that garret would put that much time and effort into a oem turbo that goes on a Ototsan (whatever that is), so im willing to find out if the Chinese really messed this one up. Plus ive been through the whole "china turbo beware" thing before. The shop i work for built a truck with some Chinese turbos and everyone told them it would not make power and they wouldn't last and hes been making 1300 RWHP for over 2 years now so they arnt all bad. So if it turns out to be junk then it is what it is and ill buy a garret unit and sell this one.

-1974 Mini 1000 - BRG Turbo Build Soon to come

-04.5 LLY Duramax - RC/LB - White - Built Trans - EFILive - Dropped 4/6

-2013 TDI Passat - SEL - White - Lowered on Coilovers - Daily Driver

-2003 Silverado SS - 408 Stroker - DP NO2 - Full Suspension ~900hp For Sale

i've tried some and so it isns't and internet sound that coming back here,
the most impredictable thing that arrived is the lost of the waste gate valve into the turbine hsg,
two turbo's didn't want to product any boost past 4 psi's, waste gates were cracking opens.. ;
it's not sure that yours will give troubles, but considering the buy of a good second hand one, as could have been an iveco k03 from a 2.7d ( 50/100$)..

-1974 Mini 1000 - BRG Turbo Build Soon to come

-04.5 LLY Duramax - RC/LB - White - Built Trans - EFILive - Dropped 4/6

-2013 TDI Passat - SEL - White - Lowered on Coilovers - Daily Driver

-2003 Silverado SS - 408 Stroker - DP NO2 - Full Suspension ~900hp For Sale