https://www.rx8club.com/ This is the place to discuss Super Chargers and Turbos, Nitrous, Porting, etc en Tue, 19 May 2026 04:59:17 GMT vBulletin 60 https://www.rx8club.com/images/misc/rss.jpg https://www.rx8club.com/ https://www.rx8club.com/series-i-major-horsepower-upgrades-93/pre-compressor-injection-276787/ Fri, 08 May 2026 05:15:33 GMT So then gents

I'm considering adding a small injector into the intake of my charger to get some cooling of the charger but mainly to improve the atomization of fuel to air which I would hope should improve power and economy

Surely you bunch of turbo nutters have already tried this ? Not with water / meth but gasoline in small amounts ?

biggest issue I know of for a turbo pre injector is you must target the injector so it sprays at the compressor nut,. this means the fuel doesn't smash into the blades at 100K rpm it hits the hot nut and evaporates to small enough droplets to not cause damage ( or at least rapid damage)

Not an issue with a roots charger as the blades are running so much slower and are much more substantial

surely this must have been done? ]]> Series I Major Horsepower Upgrades 350matt https://www.rx8club.com/series-i-major-horsepower-upgrades-93/pre-compressor-injection-276787/ https://www.rx8club.com/series-i-major-horsepower-upgrades-93/looking-information-studs-dowels-276779/ Sat, 02 May 2026 17:33:14 GMT Hi all,

I'm slowly starting to piece together what goes into a turbo build, and almost everyone recommends improving axial rigidity of the core. So far i've learned that the stiffer it is, the less stress there is on the dowel landings during high engine loads and/or a knock event, preventing cracking and catastrophic oil leaks, correct?

Now, there's a couple of solutions to achieve this, from what i've seen including;

Increase axial rigidity - Adding a single extra dowel like Brett did. Brett if you read this; do you bolt into that dowel from both ends using shorter tension-bolts or does the dowel allow a OEM bolt to run right through?

Increase axial rigidity - Adding multiple (4 to 5) extra dowels by machining out tension-bolt holes. Again has me wondering how you bolt into/through those.

Increase clamping force - Adding a few 10mm studs in strategically picked locations. These don't need machining of the holes, the drawback being they don't provide the same axial rigidity increase as a tight-fitting dowel.

Increase clamping force - Adding a complete 10mm stud kit all around. This again means relying completely on friction between plates to prevent micro-movements and stress on the original dowel landings.

Increase clamping foce AND axial rigidity - Adding a few / a complete oversized stud kit, (1/2"). This would require some serious machining as alignment of the holes between plates plays just as big a role as the accuracy of the hole diameters.

So now i'm kinda on the fence about what option to pick, and i'm hoping you guys can help me along a bit on this. Is just a decent increase in clamping force paired with properly prepared mating surfaces "enough" or would adding a dowel / dowels / oversized studs be a preferable option?

Thanks in advance! ]]> Series I Major Horsepower Upgrades Mazdarian https://www.rx8club.com/series-i-major-horsepower-upgrades-93/looking-information-studs-dowels-276779/