drain89

iTrader: (10)

I have searched everywhere and come up with multiple part numbers. I have never got a confirmation from a 1LE owner on what their part numbers are.
I got these numbers from an old post that claims they came out of an '89 Hot Rod Mag
10121026 Fuel Tank
25094804 Sending Unit
25121120 Strainer
The only place that I could pull up any of those numbers was from parts.com and it didn't say anything about 1LE or Performance Package. I didn't see any mention of them when I went through the parts files at the dealer. I found totally different numbers
12509285 Fuel Tank (replaced by PN 10269091)
25027221 Sending Unit
The computer at the dealer listed these as the same parts for all 90-92 F-bodies that have multi-port fuel injection (3.1, 5.0, 5.7). It was no longer 1LE specific. Does any one, especially someone who owns a 1LE, TTA, B4C, or works on them, know which are the right part numbers? Also, would the fuel tank and sending unit from a 4th Gen work as a good alternative? I heard that they were an improved design that didn't have fuel starvation problems during extreme cornering. Can anyone please provide some actual facts about this? Thanks Draino



[This message has been edited by drain89 (edited June 10, 2001).]

drain89

iTrader: (10)

btt

Drew

iTrader: (58)

Well I don't own any of the above, but I do own 3 91's and an 87, and used to own an 83... I've NEVER had a fuel starvation problem goign around corners in a thirdgen. The general concensus is that the 1LE's etc received the exact same tank as everything else. I don't doubt it at all. Why would GM make 2 different fuel tanks?

Mike-88CamaroTBI

You are lucky Drew .. "no fuel starvation problems". Under 1/4 tank I have had it on all my thirdgens. It is my understanding that 1LE's came with 18.5gal internally baffled fuel tanks. Reasons 1)More fuel due to racing and 2)baffled to stop the fuel from sloshing to the side and away from the pivoting tank mounted pickup under HARD cornering in low fuel situations.

The reason 2) was critical for road racing thridgens since racers put in "enough" fuel for a race and every gallon they leave out is 7 lbs saved.

There was a lot of discussion where 1LE owners reported putting up to 18 gallons fuel in their tanks. That is how they knew the tank was different since other thirdgens are 15.5 or 15.9 gallons.

Mike

Drew

iTrader: (58)

For reference the GM shop manual clearly states that all fuel tanks have a capacity of 15.5 gallons. Now this may or may not be accurate as 1LE's generally aren't covered. Personally I dont think the mythological "1LE gas tank" exists. If it did I can't see why GM wouldn't have used it on all the later thirdgens. Finally I don't think its even worth worrying about since I've NEVER experiance fuel starvation (throughout 6 years of beating on thirdgens) and have never seen a 1LE on the roads, much less in a salvage yard.

Guest

Both my 85 and my 86 starve for fuel below 1/4 tank in corners, its a common problem. The carbed cars dont experience it, you can guess why. The TBI cars are probably less prone to difficulties, but the TPI cars I have been in that dont have the extra baffling in the tank (and there are 2 different tanks) have starvation problems.

As for the 1LE tank, 18 gallons, and all that... It was illegal to race with anything other than a stock tank, ie:15.5 gal. That doesnt mean the tanks werent bigger due to being blown up by an air compressor or other means.... which I know for a fact happened because someone who was involved with racing them told me exactly that.

p.haze92

Sorry guys but my 1991 1LE only had the 15.5 gallon tank. I wish they were 18 gallons.

91B4C jacob

Mines only about a 15.5 gal tank. I know that the 1LE got a differnt fuel pick up (pivoting) and the tanks had baffels built in as said above BUT the B4Cs didnt get that we really only got a few things from the 1LE i.e. big front brakes(and only a hand full of late 91s got them) but B4C only got the stock tank I am prity sure on that (never been in there yet BUT Im sure I will be someday fun )
anyway im done blabin so later

jacob

------------------
Ya sure it is just an RS

B4Cyaa

1991 RS B4C
Former Nebraska Highway Patrol Car
305 TPI
WC T-5
Four Wheel Disk Brakes
Only Options
Rear Defrost
Am-Fm Radio
Red-int White-exe
One BA Of A 350 In The Works
Mods
Dynomax Cat Back (to hold me over till I got the $$$ for the Borla)
best 1/4mile Run of 14.92@94.83
with 145,000 on her

https://www.thirdgen.org/rides/index.tgo?action=view&rideid=2201
god speed dale

drain89

iTrader: (10)

Guys, I think that the early R7U cars and and early 1LE's (88 & some 89's) may have received the 18 gallon thank. I've heard some people attest over the years that theirs held over 16 gallons of fuel. Also John Heinricy (Cheif engineer for Vette and then Camaro's) stated in Motor Trend that they upgraded the fuel system with a baffled tank and special pickup on 1LE's. The ONLY way we can find out what was used and on what years is if we speak to Heinricy (unlikely) OR some 1LE owners like Carl Hunter or some of the guys over at 1LE.org. I hoped some owners of 88-89's and 90-92's would respond with their actual part numbers. Both of my EFI IROC's suffered from fuel cutout's on hard cornering. If their is a better tank that the factory offered I would love to have these parts. I think many others would too. I may have to swap in a 4th gen one (if it will fit) or build one.

Joel

According to the 1982-92 Chevrolet F-Body Parts and Illustration Catalog, there was a 1LE-specific fuel tank in 1988 and 1989, Part Number 12509285. The standard tank for all V6 and V8 applications in 1988 and 1989 was Part Number 12509205. The 12509285 1LE tank was found to work so well, that it was incorporated into all F-Body's from 1990 through 1992.

With regard to size, the catalog lists 59 liters (approximately 15.6 gallons) as the capacity for all tanks from 1986 through 1992. There were some minor capacity differences in 1982 through 1985. During these years, the capacity ranged from (53 to 64 liters) 14.0 to 16.9 gallons. Primarily, the cars intended for export received the larger tanks.

drain89

iTrader: (10)

Joel, you are the man! What part numbers did it list for the sending unit and the filer (in tank)? Where did you get your illistration guide and how much did it cost?

Joel

The sending unit for all TPI and MPFI applications from 1988 through 1992 is listed as Part Number 25027221, and is the same sender used in the 1LE. The TBI received Part Number 25094812.

The strainer applications are similar to the fuel tank situation; the 1988 and 1989 1LE received a special strainer, Part Number 25027354. The standard strainer for those years was Part Number 25055458. All 1990 through 1992 F-Body's also received Part Number 25027354.

I purchased the 1982-92 Chevrolet F-Body Parts and Illustration Catalog through the Camaro Enthusiast magazine (which I believe is now defunct) in 1993 for around $50.00. I'm not sure, but some savvy GM dealer may still have access to this publication.

drain89

iTrader: (10)

Thanks Joel. You are extremely helpful.

Kevin91Z

iTrader: (1)

Some guy on the thirdgen email list claims to have gotten 18 gallons into his 1991 or 92 1LE Formula. He says he ran it all down to empty and then filled it back up. Who knows tho?


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1991 Camaro Z28
5.7L 5-Speed (originally 305)
13.23 @ 107.62 MPH
Southern California
Member: SoCal 3rd Gen F-Bodies
Webmaster: SoCal F-Bodies
-=ICON Motorsports=-

Gregg1LE

I have never been able to get more than 15 gallons into my '91 Z28 1LE.The guys blowin' smoke.
Gregg
http://www.1le.org

super83Z

I have never heard of getting more fuel in 1LE tanks but I have heard of special baffles to keep the "rolling gas gauge" problem from occuring and also to cure the fuel starvation.

------------------
I WOULD RATHER PUSH A CAMARO THAN DRIVE AN IMPORT

1983Z28 350w/ edelbrock performer RPM power package , dynomax shorty headers, 700R-4 with shift kit, 750cfm carb, edelbrock 3" exhaust system, ASCD SS hood, 16" IROC rims.

future mods:
completely done over suspension, black paint with flames, Hurst shifter, dakota digital gauge package, procharger supercharger.

Eightyninef

There is only 1 part # for all 3rd gen replacement tanks. I had Dal order me a new gas tank, and only 1 # comes up for 1LE, TTA, and regular cars.

So all special tanks are not available anymore. mine is in transit right now

Eightyninef

This is the only tank available for any 3rd gen according to Dal.
10269091

Mine is leaking bad, so I ordered this one. It better be baffled

p.haze92

Larry, you should be able to have your tank replaced for free by the dealer if it is a 90-92 model. There was a safety recall on them for leaking at the filler necks. I had a 1991 Z28 where the recall was supposedly done but the dealer did it again after I stated that NHTSA website was informing people to let them(NHTSA) know about any trouble with dealers not wanting to comply with it. Anyway there website is nice that you can input your type of car and it lists any recalls.

Eightyninef

my car is a May 1989 that I factory ordered. Some how GM got away with not including my car in the 1990 recall.

If you know of anyway that I can fight them, pls let me know. I am not looking forward to cutting up my exhaust, and droping the rear end.

89 all orig Formula

Omar

Larry, I used that same number to get my baffled, 15.5 gallon tank.

------------------
1989 IROC-Z 5.7L
NOS 150HP kit
ProBuilt 700R4, PI Vigilante 2800 stall lockup
Baer Brakes 12" Sport System

Eightyninef

>>>Larry, I used that same number to get my >>baffled, 15.5 gallon tank.<<<

DID You have to get a new sending unit? and strainer thingy? or just reuse the old. I know some baffled tanks have a special sender, but I'm not sure about this one.

my present tank is NON-baffled and leaking. so I ordered that tank above, and will also do a fuel pump as well. 60,000miles and 12 years I figure I might as well.

It will hurt to hack out the OE exhaust to drop the tank, but I see no alterative.
1989 all original Formula
Larry

Jza

My 89 was always having problems cutting out on sharp turns at around a quarter-tank. I replaced it recently with a tank out of a 92 (10269091) any now I've gone down to where I had probably .4 gallons left (I know because that time I put in 15.1 gallons and can scan a recipt for it) without cutout problems.

And if you want proof of the differences between the 89 and 92 tanks at least, I have pics. Email me and I'll send em to you.
The baffling inside is the same, the difference is the size of the plastic "tub" that the pickup rests in. In the 89s (and most of the older pre-87) ones, and the non-performance ones until 91), the pickup bowl is shallow, only about an inch deep. The 92 tank I got had a tub in it about 4 or 5 inches deep. The people at the parts place said the part number applied to "91 and 92s, TTAs and cars with the performance package." (quote them, not me). I just know that I'm very happy with the swap.

Omar

I dont think i had to buy anything else to make it work. BUT, I could be wrong. I did the swap a while ago.

And I couldnt agree with Jza more. I can also get it down to .5 gallons before I start to bog on a HARD turn. But I try not to let it get that low on a habitual basis. Times are rough sometimes.

------------------
1989 IROC-Z 5.7L
NOS 150HP kit
ProBuilt 700R4, PI Vigilante 2800 stall lockup
Baer Brakes 12" Sport System

Guest

If you drop the rear diff down and disconnect or at least move the brake line so you dont kill it, you should be able to get the exhaust out of the car without cutting it up. Reason I say should is it works on cars without the dual cats, and I am pretty sure yours has dual cats... I would at least attempt it.

Jza

I reused the whole assembly, and I'm willing to bet the "swinging" pickup (if you were to get one) would fit right in as well.

Also, when I did mine, I had the a$$ end so high in the air the exhaust system would have slid right out the back, axle-hump and all. I didn't disconnect the brake lines either, just unbolted two of the brackets so it would come down with the rearend.