Charged350

iTrader: (1)

i got a full forged 7.5:1 355 blower motor built for a lot of boost, im gettin a 177 for christmas and im wondering what kinda fuel do i have to throw at this thing to run right...i have the stock pump with a malory 4 way regulator with a boost port on it, should i do an inline add on pump or should i do the intank pump...let me know please...

flrtin1

You dont specify your delivery system......for every one I have done so far the Holley mechanical 130gph http://store.summitracing.com/partde...5&autoview=sku has worked fine for up to dual 650 cfm carbs on a 8-71/+.030 350 combo

leeperryracing

the edelbrock victor series mech. pump is a very good choice also...im using one on a built 355 with a 150 wet shot of nitrous and the fuel pressure guage doesn't move upon activation of the nitrous! and a return style fuel system is pretty the way to go, roots blowers are fun, im jealous.

Damon

Like Lee said, above, a remote fuel pressure gague mounted where you can actually see it while you drive is your best friend. If you can hold good fuel pressure all the way up through the gears for an entire run you've got enough fuel system. If you can't then you don't.

Even stock high pressure in-tank EFI pumps when used at carburetor-friendly pressures (~6PSI) can deliver a TON of volume. As line pressure drops the volume of fuel they can deliver goes up. A return-style regulator is a must with them, however. It might be enough to feed your motor, it might not. That's where the remote fuel pressure gague comes into play.

leeperryracing

on the subject of roots blowers, i'd listen to Damon

Charged350

iTrader: (1)

ok ...i have a remote gauge and the malory 4 way adjustable fuel press reg with the boost port on it which i do plan on using, so if i can make a run with the pressure not dropping during that time, i should have enough fuel then no?...if not i rather do a inline add on pump of some sort instead of doing the intank one ...pain in the ***....and by the way....no mechanical pumps...electric pumps only...

flrtin1

Since the fuel gauge w/isolator from autometer did not come out until about 6mo after I mounted my direct gauge in 1986 mine is out side the windshield next to my boost gauge......but it is very nice not having look away from the road when you are getting on it (as you will find out you will be other occupied lol) to see your fuel pressure.

http://www.youtube.com/watch?v=0OO5HRHxW5I

Damon

I don't like to see more than about 1/2 PSI pressure drop during the run. If it nose-dives it'll be obvious that you're outrunning your fuel system.

Confuzed1

iTrader: (4)

So - someone IS gonna try a 177 on a thirdgen! -Awesome! I was honestly considering the 177 myself since it's 1K less than the Magna Charger I'm getting, but from my rough measurements it seemed to me it might not even fit under a 5" cowl hood. But - If ya don't mind it sticking out of the hood, it's "open season"!

-I'm just the opposite from you when it comes to fuel pumps though...I'd assume run a mechanical pump myself if it'll satisfy the fuel requirements, instead of an electric pump.....why you say? -I've never been stranded by any mechanical fuel pump, but I've had 2 electrics go bad before.

Please post up the install and how it fits in a thirdgen!

Charged350

iTrader: (1)

yeah im gonna go for it, and as my i would wanna do a electric pump...its already runninng the stock electric pump and i would try and see if it will be enough to run the 177 and if i can jus get away with a inline addon pump if i need more....but in any case here is the car and my raim air 2 hood which im gonna try to make work with the 177...if not...6 inch cowl will be replacing it and if you know anyone that wants the ram air hood then please let them know....

flrtin1

This is where the 144 sits at, but I also had a 2" dual carb adapter on it....I think the 177 is a inch taller so with a single carb figure about an inch lower than this.
(sorry for the crappy pics but cameras were not as good 22yrs ago )

leeperryracing

at part to half throttle it may be ok but beyond that the stock electric pump is going cry out....remember you're not gonna be just motor anymore, you need adequate fuel delivery to now support the blower with the motor also. Do it right man, don't leave it chance and hope to get lucky.

flrtin1

The two worst things you can do to a blower motor is, not have enough fuel and wind up with a WOT full boost lean condition backfire or not have enough octane for your effective compression at full boost.....if you have either of these happen you will probably be repacing engine parts (especially with the low octane condition)
Another thing to pay attention to is air temp, you may be running enough octane when it is warm out (80*-90*) but when the temps drop to say 40*-50* you will feel a huge gain of power.....be carefull you have enough octane for the denser (colder) air or you will run into the detonation problem then also.

If you look on page 4 on this link http://www.holley.com/data/TechServi...ech%20Info.pdf it shows the effective compression chart....an example would be at 8.5:1 static compression and 10lbs boost your effective compression will be at 14.3:1 so you need to have enough octane to handle that without any detonation.

WheelsUp84z

iTrader: (2)

damn, that car looks alot like my old one.... it was totalled back in 04'

Charged350

iTrader: (1)

awsome thanx for the pics man, help a lot to see it and not imagine it lol....but as i was saying, im not gonna take a chance with a stock fuel pump on its own....what kinda inline pump can i add on so it can deliver the right fuel to this beast...what kinda pump are you runing on your blown cars guys?

leeperryracing

holley, mallory, edelbrock just to name a few offers mild to medium duty in-line electric pumps that will more than suit your needs. With your set up one rated at around 110-120gph(gallon per hr) added in with your stock pump should more than do the job....just find a jegs or summit catalog and go to town, they aren't expensive either.

Charged350

iTrader: (1)

thanx...i would really like to use a pump that sumone is using here with their supercharger...so at least i know it works for what its meant for...instead of using some new stuff and being a guinie pig lol....but all in all thanx for the help guys....now what to do with the hood, should i mold in another scoop in the middle and get a 5 inch cowl...i wanna do sumthing funky to the ram air hood and make it really custom....anyone have any scoops that would look good molded on the hood, or i can do a shaker on a ram air....any clues or pics would be awsome...thanx guys...

flrtin1

I currently have a 2.25 induction hood with the hole cut for the scoop.

WheelsUp84z

iTrader: (2)

Im running blowthough carb with a turbo... My setup consists of a Magnafuel Prostar 500, and Aeromotive 13202 regulator. I have a steve morrison pro series hat, super victor intake, 1" spacer, and a 6" cowl hood