MIGHTYMOUSE

iTrader: (59)

turns out the famed 'cas' regulator was a kirban regulator all along.

deadmanTA

iTrader: (7)

I should have asked here also. I just posted a similar question in the fueling/injection section. I asked about 1 or 2 pumps under 600rwhp and only 8 psi. Lonnie(sponser) basically said 1 for under 550, but several others are saying br fpr, return lines, BAP, and 2 pumps. After reading this I think I'll try an areomotive compact non-br with my hot wire kit and one GSSS340 pump. Then if it needs more I'll start adding.

kp

iTrader: (34)

I'm still running an aeromotive compact regulator with the big magnafuel pump, they say its good for 1000hp and I believe them.

Most regulators come with a boost reference port, if you dont hook it up it doesnt hurt anything.

A single pump and external regulator using the vent line as a return got me in the 9s, then I switched to dual intank pumps and that helped, then I switched out the stock feed to a -8 and used the stock feed line for a return and that helped more, then finally ended up with an aftermarket tank and big inline pump. I really hate to use rwhp numbers because some guy in colorado with a big correction factor and a 10 bolt M6 might make 750 corrected on a dynojet with a single pump and another guy with the same setup with a 9" and an auto at sea level may make 500 max on a single walbro. Use your injector DC, wideband and fuel pressure as a guide unless you just start with a killer fuel system to begin with.

frcefed98

iTrader: (16)

Thats why guys up here a mile high should never POST CORRECTED (False) numbers. On our local board damn near everyone lists corrected numbers in their sig

slow

iTrader: (7)

Ditto, a car makes what it makes, no correction.

especially since FI cars are not an accurate "correction" when you are talking altitude, since they provide thier own

Ryan

kp

iTrader: (34)

Yea, thats how guys make 800rwhp with 42lb injectors and single in-tank pumps. I go to bristol once a year when its 90 out (5000' DA or so) just to pay homage to our high altitude friends

onfire

iTrader: (17)

You're welcome anytime to the "House of Pain".

T A WS6 M6

iTrader: (1)

I feel compelled to put my opinion in here for some reason.......

<550 HP and you should be fine with a single intank and 42lb injectors.

I'm in FL, and my uncorrected numbers are around 500/525.

I'm using a single racetronix w/ the hotwire kit, and precision 42lb/hr injectors. Car makes just over 7.5psi at the intake w/ the APS TT kit. I have no problems w/ leaning out @ high RPM's and my tuner seemed to think it was a piece of cake to tune.

Just my .02

Lonnies Performance

iTrader: (16)

Here is my .02 as well.

First the 550rwhp is a safe number. Almost everyone can make it to 550rwhp & about half can see 600rwhp without a booster, but I cannot recommend this as it is my reputation if I sell an undersized pump.

As far as using RWHP, I do not like it, but in reality very few have their engines on an engine dyno... so there is not much other choice than to try & relate the pump size to RWHP. I take the dyno brand, geographical location, trans & rearend type into account when I discuss actual configurations with customers. Nitrous, supercharger & turbo cars are all different as well.

As far as boost referencing, it is less important with a large injector because there is ample reserve capacity. Using a smaller injector with high boost will surely limit the power capacity of an injector.

For example, a 60# injector (rated at 43.5psi) is a 70# flow equivalent at 58psi. Add 15# boost & you are back to the flow of a 60# injector without a boost reference. The boost reference will enable you to support roughly an additional 150hp with the same injector.

If you are running 96# injectors, you can run 43psi base pressure as well to make it easier on the fuel pump & still not worry about running out of injector until you are over 1000hp.

KP, since you are running one of those "red" regulators, I can understand your inconsistent results with it. (I'm trying to be gentle with my opinion, but trying to prevent others some unnecessary grief) I get about 1 call per month with boost reference problems when using that brand.... but don't blame me, I don't sell them. I've had very consistent results with Magnafuel & Weldon regulators in boost reference applications if anyone wants a recommendation.

Just a few items to think about.

onfire

iTrader: (17)

Many ways to do it. I'm using a Weldon FPR and it's dead on boost referenced. I've done it with/without boost reference, with high imp and low imp, with/without front mounted FPR.....boost reference works well, but is not necessary if you have plenty of injector.

kp

iTrader: (34)

Its possible, the compact regulator has a pretty small chamber and diaphragm and I'm probably beyond what it was made to do, but since I dont boost reference it really doesnt matter.

As far as the rwhp, even though you may take driveline and elevation into consideration when making a recommendation most dont when passing that recommendation on. So I'm just reminding people why throwing rwhp numbers around can hurt you sometimes with fuel systems, not implying you were doing anything wrong.

gametech

iTrader: (1)

I suppose since the OP's question was already answered, it's OK to keep this partly off-topic. You and KP are exactly right. I have seen some totally outlandish claims of what a fuel system can support because the dyno run was done at a stratospheric DA with 30 or 40% correction applied. This is particularly troubling with a lot of magazines, because some people treat magazine articles as gospel. A perfect example was a article about a GTO last year that claimed over 750rwhp with a stock pump and 42# injectors. This also applies to 1/4 mile corrections, as it is a lot easier to hook when you are significantly down on power, but correct to standard #'s.

94m6Z28

so simple..a boost ref regulator isent need in most aplications

ie
stock motor, 5-7psi, 42lbs injectors and a 255 intank

Lonnies Performance

iTrader: (16)

Yes,
For this level, boost referencing is hardly worthwhile. 7# boost only has an approx 6% effect on the injector flow in your application.

Project Dc2

iTrader: (4)

can a boost referenced regulator be used in conjunction with a stock 98 regulator in the tank ?

if so, how would one install the regulator ? on the return line in the rear section of the vehicle ?



currently my 98 has a built motor, cam, T70 turbo with 60 lb mototron and 255 hp racetronix fuel, and meth kit im trying to make sure i wont max the fuel setup out on the dyno.

Banshee Ben

iTrader: (4)

I have plenty of fuel from the pump. 60lb injecters, bigger fuel rail. Aiming for 11-14 psi boost. I have no regulater as of now so I need to buy one. Probally will just get a 1:1 unit and possible not use the boost hookup, I'll let my tuner decide. What are the problems with the "red" ones. I think I was gonig to get a red one....

Lonnies Performance

iTrader: (16)

You cannot use a front mount regulator in conjunction with a rear mount factory regulator.

Also, the reason to use a pressure regulator is to control the pressure where it matters.... at the engine. Mounting it at the rear of the car is not the way to do that. To work properly, it needs to be on the fuel rail.

I've had problems with the "red" ones boost referencing properly in the double digit boost levels.

Zombie

iTrader: (2)

If this GTO was in Vegas it makes the artical even funnier since the car is from make believe land. No one has ever seen the car run at the track or anywhere else for that matter. Not to mention none of his combo / track info matches.

gametech

iTrader: (1)

I'm sure we are talking about the same car with the fucked up looking flame paint job.

Zombie

iTrader: (2)

bingo. Pretty messed up that they ran the artical that is clearly BS and easily called out as such by looking at the fuel system/turbo stats and what the claimed ET/MPH are.