neverstop

I would think the f1a94 is the "procharger ysi" just based on the way cars seam to be reacting to it. I believe Fran96 put down something like 1200whp with one and there are renegade cars going 7s on that blower so maybe the cfm is deceptive on procharger specs. which would make sense since I am making 900whp (maybe 1k crank hp?) on an ancient D1SC which "should" only be capable of like 800 crank hp. I spoke with procharger and they said f1a94 it should have the lowest parastic drag per hp of capability of any procharger in that range and has very low IATs also.

if it were me I'd go with neither and do the f1a94 but there are a lot of very mean ysi cars on here too.

Milan

AFAIK there is not an F1X car out there that has gone as fast as the F1A-94. The F1A seems more reliable too from what I know, something to consider for sure...

neverstop

f1a is torque monster but pretty old tech and seems to run out of steam at higher rpm from what i can tell, I'd do a YSI over an f1a all day personally

Blue by U

Look s like f1a would be considerably less cfm compared to ysi-b..... like 1625 compared to 1950 cfm....

Unreal

Ratings and actual real world results are two different things.

algZO6

id like to see some back to back testing between a ysi-b and a f1a-94

neverstop

I wouldn't get too hung up on the peak cfm numbers these companies put out. Procharger doesn't release compressor maps and I don't think there is really a consistent process between the companies measuring it the same way. If you're looking for 1-1,100whp I'd do the f1a94 personally just because it's much newer tech than the ysi and procharger is on the cutting edge of centri blowers, but the ysi is very proven setup too.

Blue by U

How are the f1x that aren't over spun? Why are they any different than the other prochargers?

ripjr123

wow that gives me high hopes only thin g i am worried about is me being on stock ported ls3 heads. although i have heard that ported ls3 heads flow pretty decent but probaby nothing like those 255s! and what trans are you using ?

algZO6

we both run RPM level X 4l60s with FTI stalls.

ripjr123

nice 👍🏽 I am still running the stock a6 with a yank 2800 going to try to get on the a6 1 power adders record list!

RecMech

Not overspun (8"/4.25") my F1x pulled HARD up top.

11.5 seconds just in 6th gear peaking at 25 psi.

Now with a 4" pulley, it just pulls harder! 31.5 psi... Granted, if it fails it is my fault and I wont complain.

algZO6

whats your combo?

RecMech

Race only.. 427LSX, AllPro heads, Hi-ram, F1x, ECS 10rib, air-to-water, ProEFI

Frans96ss

F1A-94 works great on a 427

algZO6

any chance in telling us what pulley combo?

Frans96ss

Probably not haha.... Its over spun though i will say that.

algZO6

kinda figured you wouldn't spill the beans. overspinning or not, seems like its taking it well. your car is running unbelievable. do us vette boys proud at import vs domestic.

neverstop

hahah

seems like been reasonably reliably though just since you've had the combo for a long time now

EX1

I personally know of two F1Xs that have failed. Both were overspun to the moon though making well over 1400whp. I haven't seen one come apart that was kept at or below the max impeller rating although I'm sure some have. Mine occasionally exceeds the speed rating, but only for a second or two while trying to not shift into 5th as I cross the line at some events.