[Syty] Fuel Pump

Wed Apr 19 06:37:43 CDT 2006

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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>> Syty at syty.org
>> http://lists.syty.org/mailman/listinfo/syty
>
>
> 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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>

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