turbotuner20v

I'd look at an f1a-94 or f1c-94 on a large displacement 4-bolt motor

EX1

On paper the R still looks like it flows more CFM. Are they just easier to spin or what else am I missing here?

turbotuner20v

The f1r just seems to be old tech and runs out of steam up top and has a max rpm of 68,000. The f1a-94 is a completely new blower design and makes big top end power. It's a little soft down low on my 365ci motor, but I think it'd be great on your 427+ci. The f1c-94 uses the same wheel as the A, but uses the old C cover rather than the new redesigned cover, but the new cover should be out soon making the f1c-94 better than the A

EX1

Looks like I will be "stuck" with an asthmatic F1R for a while then

The build isn't even done yet and I am already wanting to try out the new Procharger IC and a different head unit. No way I could do that and still be ready for 2K in March though.

turbotuner20v

I think you'll be good with the R and original IC, just don't plan on 7,000+ rpm.

ajrothm

Here is my F1R, 4.25"/8" pulley. 900 pull was with the velocity stack on the blower. This was a 402, mast 245s and a baby 226/238 cam. Blower is at 69120 rpm at 6800. It comes on hard and makes big midrange but my motor didn't seem to make as much power as it should have up top, even though the blower kept producing more boost, the engine wasn't making any more power with it. Our theory was the cam was just choking it up top.

To answer your question, a local guy that used the same dyno that I did about a week before had a 427/F1X, 4.5"/8" thru the air filter. We laid his dyno curve over mine and they were VERY close. I may have had 20hp on him before 5000 rpms, but from 5000 on up, his curve just took off. At 6000 when mine flattens out, his was making a straight up climb. At 7000 he was at 1143 rwhp with pretty aggressive timing..(18-19*). Then on shell MRT and more timing, no air filter he made right at 1200hp.
I would say at 6000 rpms when mine was at 900, he was like 950.. But that last 100 rpms, he gained 200hp.

I think if he had a 4.0" pulley, it would have had WAY more midrange power then mine, but he would have been way over 30 psi boost at 7k.

I can tell you this, when I change blowers, I'm going to the F1X, my car is an auto with a stall so I don't give a FK about power below 4500. F1X rules. I'd put a 4.0" pulley on it, then a wastegate to limit peak boost to whatever my motor can take. I will likely go to this setup later this year after I get my new motor back in.

turbotuner20v

This is my f1a-94 365ci dyno vs my 365ci f1a (old version) dyno. I just think the f1a94 has big potential on a larger ci motor

Attachment 48369488

EX1

Great info..... Thank ya'll.

Are either of you going to be at the roll event at TX2K?

turbotuner20v

Yup, the official and unofficial ones

EX1

Well I hope to get some official and unofficial runs in with you. Loved the video of your car that TRC did at 2K.

White_Lightning

It's pretty funny ( or sad) that you can search my thread and find a dyno for a bunch of different pro charger combos..
that being said im sure that going "full retard" as we call it you could squeeze more out of each of my combos.. all my tunes have been " conservative" to stand up to abuse.. all of my dynoes are with the Filter on and not with a Bell mouth or something like that..

i think you need to build the combo for the motor and powerband you want..

4 bolt.. AVOID the f1X.. i think the X or anything over 1000 rwhp is bad for a 4 bolt LS platform.. just my 2c.

i think if you have the R.. give it a try... worst case you sell it and get something different..

turbotuner20v

Lol, it's like a library of research papers so you don't have to do your own experiments

I'd agree on skipping the x on a 4 bolt, that thing just moves an insane amount of air.

Hell, maybe we could swap blowers in the off season so I could try the R on a small ci motor and you try the f1a/c-94

ajrothm

I won't be at Tx2k this year since the motor is out. When it goes back together, I have a MUCH bigger cam going in it, I will have the F1R back on it so I'll be curious to see if the small cam was choking it all this time. Unfortunately, with the auto I can't do the dyno queen shootout with you guys so I'll have to wait til I can get it back on the strip and see if it picks mph. I'm hoping for mid to high 150s in the 1/4.

I like the R blower, it's been very reliable and spools quick, so I hope I can keep it, however I know I'm maxed so in order to eventually get more HP/MPH, I'm gonna need a bigger blower.

EX1

I appreciate all of the info and threads you have supplied to the community. I think I am going to do just that and just try the R out
I would be down for that. It would actually be really interesting to see. Let's talk about it in Houston
TX2k is less dyno queen based now. The roll racing events make people line up and see who has the highest traps. It is a hell of a good time! The 1/4 track days are also a ton of fun and would be perfect for your auto. Let us know how that cam swap turns out!

Milan

I'm willing to bet you can hit 1k whp with the F1R. The problem with the F1R is that it's a heat monster, but if you are running E85 this won't be nearly as big of an issue. Don't be scared to throw timing at it.

EX1

I would be perfectly happy with anything north of 900 on boost. What I am most concerned with is the power falling off on the big end. I might be spraying a little bit on top to help out.

As for wheels and tires, these NT05Rs of course won't cut it. I have been eyeing the 17x11 Weld RTS wheels and 325 M&H Racemasters. This seems like a popular setup on our platform.

ajrothm

Haha.. Yeah I wasn't talking about dyno queens at tx2k, I'm talking about the dyno queens here at CF. Half the members here chase all these big dyno numbers and then don't do sh*t with the cars.. The other half actually run the cars at the track, mile and airport events.

One thing about the dyno queen cars, they don't break often..unlike all the rest of ours who are on our 2nd and 3rd engines..lol.

Good luck on your build man, I think you'll like the F1R and you won't "feel" it lose power up top, but it will likely nose over after 6k, especially on a big motor like yours on the chart. A little spray will help!

On meth I never see over 120* IATs on pulls to 160 mph on 90* days. M15/M10 nozzles. I normally don't beat on it if it's hotter then 90* outside.

Milan

The combustion on pump gas is still a lot hotter than E85. Even if you are able to remove a lot of the heat from the IATs it's only part of the equation.

As for your other comment, not all of us are fortunate to live in Texas where there are runway events every other week and the drags strips look the other way when it comes to half the rules. At my local track they enforce everything down to metal valve stems.

Then there is that whole winter thing....

lane_change

I'd be interested in testing setups against you as well...I'll be running a similar setup to your old car, All Bottle Full Throttle. I'll be at both the official and unofficial events. Be curious to see how the different setups do with similar power outputs.

EX1

We will need to get a gathering of CF members and their "fast" friends for a private group. I tried to roll out with a group last year and it was a cluster......