Full-Race Geoff

G30-770 with their 1.06 a/r twinscroll housing is an awesome combination. Will be over the moon with that on a properly configured RB25

this isnt the thread for this convo, but im becoming a believer of the xona turbos for high pressure ratios. i started testing them on S58 high boost setup and very impressed so far - especially considering their packaging

Air filter restriction on matchbot might come close in some instances at sea level but overall is inaccurate at simulating a Restriction orifice. We went through this with a rally team and BW engineering a few years back and they concluded there weren't enough people asking for this support to warrant further development of the software with a restriction orifice input. @discopotato03my understanding agrees with yours, singlescroll small turbos with restrictors and antilag gets it done. this got further compounded by the cracking of dividers in turbine housings compared to the convenience of a vband clamp. IMHO - with the quality of today's investment castings I think the conclusion might be different.

we have (2) 8474 in stock, dont know of any other distributor with inventory. Full Race has a couple 9280 and 8374 as well. Dont know how long until we see more

Full Race is getting these turbos in small amounts and we always keep the housings in stock. Let me know exactly what you are looking for - depending on the configuration we may be able to help in some capacity. Worth noting we have a good amount of EFR 7670, 8370 and 8374 (for the first time in 2 years)

yep, overspeed. a 3.1 or greater pressure ratio at 80+ lb/min corrected flow is off the G35-900 map (red X area) and right along with ya @Lithium

Can you please elaborate on your full setup? Im interested to see how the match plots -altitude -fuel used -exact engine displacement -max engine speed (RPM) -max boost target (2 bar or 2.5 bar?) -what rpm are you fully spooled and WG open -cyl head and cam spec -downpipe / exhaust size and config, muffler used, air filter setup, etc. . The g series are optimized for response and low inertia, while I have not blown up any of the G35-900 and i absolutely love the turbo, I saw (2) g25's die from high altitude overspeed many years ago and learned to respect turbo speed the same as any other high end piece of equipment. edit: @lithium - funny that the big drag race precision turbos have speed sensor ports now 😁

Which turbocharger exactly? Full Race has a very small supply of 8374 and 9274. *8474 arriving this week, not sure if theyre already reserved or available 8474 and 9274 are back in small batch production right now. the 9274 moves a little more air, the 8474 spools a little earlier. 800whp 2.8L match will largely depend on max engine speed, fuel used and elevation. turbine housing should be selected based on the boost target. they will fit the same downpipe. note - the 6870 downpipe will not fit the EFR turbos; precision outlet vbands are in a different location from garrett and BW

for what it's worth Scott K @ Emtron loves the 1.45 a/r - we supply him EFR turbos and almost always with 1.45 hotside Full Race has 9274 and 8374 in stock now if you're looking for something. the 6870 is a higher-inertia turbocharger (drag race oriented) in my experience a 4" downpipe with 3.5" exhaust is an excellent compromise. often times the larger diameter downpipe gets the job done and the smaller diameter exhaust keeps your eardrums intact worth noting the 9280 compressor actually has less inertia than the 9180 compressor. Scotty K @ emtron shared some logs with me that indicate virtually no loss of spool between the two. Although BW has not produced 9280 or 9180 in the last 2 years so it may be a bit more time until that changes.

Depending on how high you rev the 2.8, and your boost level - choking can happen with 1.05 a/r. If you can log turbo speed and backpressure it's insightful into making a change. The 1.45 a/r back to backs are deceiving - on the steady state dyno they look like identical spool. but on the street, its anywhere from 150-400rpm later spool depending on gear. I'd be happy to crunch the #s for a match if you wanted to know what the calculations show?

Full Race stocks the 1.45 a/r turbine housing, can ship immediately if you're in need.

EFR turbos have largely been unavailable for the last 18 months so until BW resumes production its likely going to be pretty quiet

one area to compare for genuine garrett vs pulsar is wheel to housing clearance. the smaller the gap the better. i saw a pulsar in person and it had one of the largest gaps ive seen for a ball bearing turbocharger

gtx3582R gen2 is a great turbo from the previous generation. i can understand why youd love it on that 2.7L but the g35-1050 is very different. you might be happier with the g35-900 or the g40 if youre targetting bigger power