[Syty] Fuel Pump

Wed Apr 19 08:31:32 CDT 2006

The fuel lines that are in the fuel pump hanger assembly are actually pretty easy to replace.  I did a "how to" years ago..

 http://www.sytyarchives.com/howto/viewarticle.php?article_name=fuel_line_repair.php&dir=engine

It doesnt cost much, you just need a little blue flame action, some solder and the fuel line...

Daron

-----Original Message-----
From: Jeffrey Smirz <jsmirz at comcast.net>
To: dalwine250 at comcast.net
Cc: syty at syty.org
Sent: Wed, 19 Apr 2006 07:37:43 -0400
Subject: Re: [Syty] Fuel Pump

Right you are Dave!  Had to loosen that strap just to get 'em OUT, much less back IN.  The sad part is that one of the tank-end fittings was frozen to it's tube.  The threaded connection broke loose easily but I twisted off the tank-end fitting, so now I have to replace that entire tank insert.

Jeff

On Apr 18, 2006, at 9:11 PM, dalwine250 at comcast.net wrote:

loosening the upper fuel tank straps buys some room to rethread those fuel lines .there is my 2 cents.nice to meet all of you .  
                                                        dave

-------------- Original message -------------- 
From: "DOlivares" <seravilo at netzero.net> 

OEM IS a Bosch.

Supposedly, legend has it, the Typhoon and TTA pumps were the best of the breed, but I can tell you from personal experience that my TTA pump was constantly starving out, even from the first day I drove it new in 1989.  All the eventual versions of adjustable-FPR never helped me on the top end.  

As for the Typhoon stock pump... I haven't driven it enough to give an impression....

Since you're gonna rewire that harness-- a bit of a romantic exercise in ultimate futility (like cc-ing your heads) unless you're installing a true high-amp pump(s) in a first-gen Grand National, which isn't necessary for street/strip-- you might want to consider the viable alternative of retaining the stock wiring and splicing-in one of those Boost-a-Volt (or whatever they call 'em nowdays) on-demand overdrivers for the FP.  I got one from Kennedy-Bell and it RESURRECTED my stock-schlock Bosch TTA FP.  Too bad I never got to drive it much before I tore the engine down again....
I'm tempted to install one (basically, a 13-to-18-volt DC-DC Converter which is enabled by a boost-switch) on my 'Clone but with that fat Walbro 255 in there now-- which never chokes or starves-- I'm not sure it will do much good for the cam and injectors I'm currently running.  Your plans might be different....  

Think about it,

D.O. 

----- Original Message ----- 
From: Jeffrey Smirz 
To: DOlivares 
Sent: Tuesday, April 18, 2006 8:11 AM
Subject: Re: [Syty] Fuel Pump

Thanx Dennis. 
I had originally thought the FPR to be the culprit, but confirmed the pump problem using the technique you (and the GM manual) describe.

You seem to be suggesting that the OEM pump is already a Bosch?  If so, I'll definitely go Walbro, but based on last year's flurry of messages on the subject, I'll likely spring for the extra bucks and wait-time to get Racetronix' plug-n-play harness as well.

Jeff

On Apr 18, 2006, at 8:19 AM, DOlivares wrote:

Thanx for the advance-vote of confidence, Jeff,

But so far my experience with Walbros versus stock-Bosches strongly favors the FORMER.  And now that I think about it, everystock-Bosch pump I ever owned has been high on longevity but POOR in providing that nice neck-snapping PRESSURE needed for smooth full-throttle response.

Price-wise, they don't compare well either:  Putting that Walbro 255 in the tank (sans "pulsator") this past Summer only cost me$69 delivered based on a lucky eBay purchase!  That thing will put out over 93psi with my FPR cranked-in all the way-- and before further diaphragm depression from turbo b oost!  I'll never go back to Bosch!!  I recommend you don't either.  Be not afraid!  That extra pressure/flow will be there when you most need it... and may well save your pistons during a full-throttle blast in peak-summer weather.  Check out the offerings on eBay under "Syclone Fuel Pump" for the best deals vis-a-vis regular Internet providers of Walbros....

Although I've yet to publish my unique troubles with my "fancy" FPR-- which went BAD on me at the onset of cold weather here last November-- you might want to VERIFY that it is in fact your FP and not the FPR that is causing your woes.  I was struggling to run with only 11psi when I finally broke down and rigged-up my fuel-pressure hose & remote gauge.  I was heartbroken.  All that grief pulling the tank and the Walbro let me down...?  But, the actual culprit was a collapsed FPR diaphragm.  As soon as I switched-in the old mechanically adjustable FPR I used on my T-Trans Am (never throw away your "obsolete" performance parts!) we were back in business... never a speck of trouble since then!  Check out your start-up/idle pressure (no need to start the engine) by CLAMPING THE FUEL-RETURN LI NE with a pair of needle-nosed vise-grips or something equally positive-gripping.  If you still get the same low readings IT IS THE PUMP.  But, if the pressure goes north of 40psi, you've just saved yourself a lot of money and/or acrobatic labor!

Good luck,

Dennis O. 

----- Original Message ----- 
From: Jeffrey Smirz
To: syty at syty.org
Sent: Monday, April 17, 2006 8:03 PM
Subject: [Syty] Fuel Pump

The Ty's OEM pump is down to about 25 psi.  The poor thing barely runs.  I'm pumping and pulling the tank tomorrow.  There was a lot of talk about Walbros in Feb. '05, but I'm not planning on racing, except the occasional stoplight Grand Prix.  I'm leaning towards a Bosch replacement pump.  Advice is welcome.....particularly if it comes from the one and only serovilo, grtyphoon, bullyhart, merk1993 or any of the other great contributors.

Jeff
Syclone #950 (totaled in '99)
Syclone #1654 (formerly Chris Pearson's)
Typhoon #1165
Indy, IN

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From: "DOlivares" <seravilo at netzero.net>
Date: April 18, 2006 8:02:06 PM EDT
To: "Jeffrey Smirz" <jsmirz at comcast.net>
Cc: syty at syty.org
Subject: Re: [Syty] Fuel Pump

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