lablackbeast

iTrader: (5)

wanted to kno what was the horsepower difference between these to blowers at same psi, same mods, and same motor....?? would a D1 with a 50 equal out with the F1a both on the same psi...??

Inspector12

iTrader: (29)

Its really not a question of better overall as it really depends on the setup. Motor size, HP, goals, because it plays into which one fits your needs best. On big CI setups 408 or larger the F series blowers are going to be a little more efficient not just an F1R mainly because of the step up ratios. But that is just a quick run down of it there is alot more to it than that. Hope that gives you a little better insight.

lablackbeast

iTrader: (5)

how about a 402...??

wilson34

iTrader: (7)

402/408 same thing still a big cube motor.

Basically what he was trying to say a stroker setup would be better suited with an f1

white01ss

iTrader: (37)

Lots of info on this topic to read into the wee hours of the morning. I think I've read it all, twice. In short, unless you have a built motor you have to run a D1. Without some tricks, an F1 can't be pullied down enough to run at a safe level on a stock short block.

KP ran low 9's with a D1/346 combo. He went to an F1 and didn't gain much. I run a D1 and love it, but if I was building a big cube motor I'd probably run an F1.

uphigh07

iTrader: (48)

False i have a 383 stroker and its great with the D1 i have. Ask bob at EPP
there is more torque with a stroker. base you decistion on the CI of you engine. also depends on your goals tell us what your goals are and we will help you out. It comes up every week there is tons of info if you use the search button.

Let us know what your goals are and we will help you out from there

lablackbeast

iTrader: (5)

well yea i have seen alot of big cubes running good with their D1 set ups and this is on a extended cab silverado.... and really dont have a goal yet .... but i am just asking if what is the difference between the D1 maxed out with like 17psi and a f1a not maxed out on 17psi to on the same motor/heads/ci etc etc...?

Wicked_C5

iTrader: (1)

I agree F-1 on a big blower car!

uphigh07

iTrader: (48)

most likley the F1 i think it spools faster so you would get into and have more boost faster. dont quote me on that tho

blue00ZZleeper

iTrader: (5)

It comes down to CFM. Like stated the F series blowers have a more agressive step up rate, can be spun to a higher rpm and flow more CFM all around. For example, if your motor with a d1 is making 600hp@ 13psi, it may only take the F series 8 or 9 psi to make the same power. The F series are better for larger engines seeing as how the flow more air. With larger engines, you will max out a D1 sooner and it wont make as much boost before hitting your blower rpm max. I've seen D1's on 402's plus and they still did dam well and made 700+ easy. All in all get a F series blower if avaible lol Hope that helped.

brandon619

iTrader: (1)

A F1A will be a better choice for anything with more than 400 cubic inches. Not to take anything away from the D1 which is a great blower but the F1 will make more power and torque and a lower psi.

wilson34

iTrader: (7)

So are you saying a 402 would be better with a D1 than a F1?

I mean I know itll run like hell with a D1, but a F1 would be better suited, plus be able to grow in the end.

Yea I know it all depends on goals which would be easier for us to give an opinion, heck I'm about run a D1sc on my vette with 416ci, but later upgrading to a larger F1 headunit

COPO9560

What knd of tricks would be required to keep a stock short block alive with a F1? Upgrading to a 402 is not cheap in itself, having to upgrade the head unit as well would add up very quickly.

Jimmy P

iTrader: (177)

I used to have a D1SC on my 402. It was a fun car, but way too torquey at low rpm's and seemd to run out of steam on top. I currently have a F1C which feels much better suited on the 402.

lablackbeast

iTrader: (5)

what was your set up .... like the cam heads etc etc ...?? and was the d1 maxed out ....?? what were you shifting at ...?? what pulleys you had ...?? and were exactly did it ran out of steam..??

BLNLS1/RX7

iTrader: (2)

My D1SC puts down 712 RWHP on 12lbs. of boost on an iron block built 406.

EPP

iTrader: (22)

The D-1SC can make good power, but on a 400+ cubic inch engine I would go with an F-1A, as it won't have to be worked as hard as the D-1SC. Check out this LS2/402 with an F-1A. http://www.exoticperformanceplus.com...Car.php?car=29 Bob

lablackbeast

iTrader: (5)

do you do trades bob....?? like say if i give you my d1 and cash for a new f1a...??

EPP

iTrader: (22)

No I don't, but thanks for asking. Bob

lablackbeast

iTrader: (5)

can you give me a price for just the head unit...?? and would the f1a unit fit on the d1 brakets...??