Anyone who's installed these on an edelbrock TPI base plate, do I have to grind downd the fuel rail mounting towers?

I just put the 24#'ers in and even though the 4 bolts that hold the fuel rails on are tight and the rails are flush with the mounts, the injectors aren't in tight and it leaks like a faucet. I can push the injectors up and down about 1/8-1/4 inch

Thanks for any advice... everything is in pieces now and I hate to have to put the stock ones back in...

 

Did you use the injector clips? The spring type clips that hold the injectors in the fuel rail?


Brendan

 

I didn't have to grind any on mine. Just make sure you reuse the clips...they are hard to install sometimes but they'll work! Are you using the real fat o-rings? that is what I had to use.

------------------
Dan
------
87 IROC-Z, 6.7 $uperram & cam, Eagle 5.7" rods, Dart 200cc Iron Eagle heads, auto w/ BTE 3000stall lockup, 3.27, leather, !cat, Holley fpr, K&N'S, SLP 1-3/4" headers, Edelbrock lower intake, Holley 52mm tb, Dynomax\Flowmaster catback.

1987 Camaro Z28 - 5.2tpi, auto, 3.73s, ram air, airfoil, ported plenum, !cat, !tbcoolant, !smog, !4th gear - FOR SALE

1989 Pontiac 20th Anniversary Turbo Trans Am - 161,000 miles, !cat, 9" K&N - SOLD

 

actually, there's not spot for the clips so I didn't use them. As for the O-rings - I reused the O-rings that were on my stock 22#'ers as they are only a year old and still in good shape.

It just seems that if the fuel rails mounted about 1/4" lower it would hold the injectors tight. They just wouldn't seat themselves all the way in the top AND bottom at the same time!

 

If you're not using injector retainer clips, then you'll never get it right. What kind of injectors are you using that won't accommodate clips? The clips are meant to hold the injector steady under the high pressure side so I wouldn't even think of putting it together without them. That should solve your problems.

------------------
1990 IROC 350
Mods: Too busy trying to make it run right to mod it.
Airfoil, Dynomax cat-back, Accel coil, 180 t-stat, Bald Eagle tires,
Hypertech fan switch, Accel 23# injectors, Holley AFPR, ported plenum,
Ruger P95DC, hot wife, new oil filter, thick rubber floormats, no cats.
18.0 @ 85MPH since I'm one big-a$$ MF
"It's better to have and not need than to need and not have."

 

I just installed a set of Accel 24# on my Edelbrock Hi-Flow TPI intake and it worked fine. Nice and tight. I used the clips as you are supposed to. Accel injectors have the groove for the clips. You have to push the injectors tightly up into the fuel rail, then install the clip so the injector won't work it's way back out.

------------------
'92 RS, ZZ4/LO5 10:1 350, Edelbrock 6085 heads, Crane 208/214* 467/482" 112* cam, GM/LT4 1.6 roller rockers, Edelbrock Hi-Flow TPI base, runners & 52mm TB, Accel 24#, SLP/Jet-Hot 1-5/8" headers, Catco 3" cat, Flowmaster 3" catback, Hughes 2500 stall converter, stock 700R4, 1LE driveshaft, SFC, Auburn Pro posi w/3.42, 17x9" ZR1 rims w/BFG tires, Medium Quasar Blue w/white SS stripes, Zaino...

 

Here's a pic of the injector. If the pic doesn't show up, Its blue and much skinnier than the stock one. Its supposed to be a 24# inj for tpi... At least I think it is.... the top part of the inj looks like the stocker, but the sray part is much different. the blue one has 4 tiny pinholes and the stocker's is recessed and its not really visible. I put the stockers back on with no problems and they don't leak, so I think these are not for tpi.





[This message has been edited by Bob M (edited July 28, 2001).]

 

Hmmm. I think you're right. They look way to skinny, no clip grooves and the spray nozzle is much different.

 

bob ive seen these used on mopar v-8s
they can be used but they have to be shimmed
airdeano

[This message has been edited by airdeano (edited July 28, 2001).]

 

Hmmmm... thats what I figured.... I was pretty bummed when they wouldn't fit! Anyways Thanks for the help, I did put the stock 22lb'ers back in so I can at least drive it again.

Tommorrow I have to hook the rest of the tpi, etc back up. Just for Shizzz and giggles, I'm gonna put the stock runners back on (it had the slp's on). I'm curious to see how it runs with those... I liked them better with the 350, see what happens on a 383

 

I put old style SVO #24 injectors in my Accel base. I had to add a small washer to the towers to quiet them down. So I think grinding material would be detrimental if this is the type injector you are using. I had stock LT1 GM 24lbs in before with no problems.

------------------
Rob P
89RSconvtZZ4TPI Edelbrock Intake
SLP Dual Cold Air Intake 1 5/8" Headers Semi-Siamesed Runners, IROC
suspension, alum shaft. Numerous mods.
92Z28convt5spd (stock)
71Impala convt 402BB
BETTER DRIVING THRU SUPERIOR HORSEPOWER!

[This message has been edited by Rob P (edited July 29, 2001).]

 

Rob, could you please explain the "washer to quiet them down" bit? I've got Ford 24# injectors in my TPI right now and am going to be swapping to the super ram base manifold in the next couple of weeks...

Thanks!

--andrew

 

Me too Rob! Very interested as I have SVO injectors and they are quite "clicky"!!!!

 

I have Accell 24# injectors and an Accell super ram intake, and my #3 injector keeps leaking. I replaced the O rings on it, and it still leaks (yes, I have the clips on them too).
If I push down on the injector, it stops leaking, so I was thinking of milling down the fuel rail mounting posts about a 1/16".

So what's with the washer theory? Put in a set of stainless washers on the fuel rail side and make the injectors a little taller?
Might be easier than milling down the mounting posts.

Follow this train of thought: Leaking injector = vacuum leak as well, right?
vacuum leak can account for a really ****ty idle, surging and such?

Would be nice if it were that simple.

 

I just installed Accel 24s in my C-4 with a stock base. I wouldn't think any modifications should be necessary on your base or fuel rail if the injectors are correct. I reused my old clips on the top groove of the Accels (the groove that goes all the way around) and they fit fine. If you are installing new injectors, you may want to bend up your O-rings and check to see that there isn't any excess plastic from where the two molds came together that made the injector. One of mine was leaking, so I pulled the fuel rail and that injector out. There was a tiny bit of plastic "flash" under the O-ring which made it leak. I scraped it off with my fingernail, put the O-ring back on and it's been fine.

Later,

Carl

 

Where can you get more of those clips?

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Mods: ZZ4 engine w/stock TPI, adj, fuel pres. reg., MSD 8.5, HI6S ign. w/ PS-91 coil, K&N filter, TPI air foil, Hooker comp. shorties, American Thunder flows. 160* stat., TB bypass.

 

Unfortunatly, the only place that has the clips is your local Bend ya over GM dealer. They aren't extremely expensive so its definatly worth it.

Brendan

 

I recently installed 24# Accel injectors and had the exact same problem as Carl. A small sliver of yellow plastic behind one of the o-rings causing a major leak.

------------------

1991 5.7L Z28
14.456 @ 92.78 MPH

 

Ok that's two. When I replaced the O ring, I looked the injector over, but I may have missed it.
My other problem with this injector is that
it bleeds down even when the car is shut off.
You can see the bottom of the injector is wet, and if you moce it around, it leaks even more. I emailed the guy I bought them from to see if there is any kind of warranty
with them.

I am not real hapy with them so far. They are more susceptible to clogging - I have already had one so clogged, it wouldn't even fire. I may go back to the stock 22# ones I still have.

 

I may have the answer for you guys with the accel injectors.I just bought the 30 lbs. injectors and used the clips.But when I bolted the rails on the injectors slid up and down.I put the clips in the same spot as the stock ones.The decieving thing about the accels is that there apears to be two mounting spots for the clips.I pulled the rail back off and moved the clips up.Then reinstalled the injectors on the rails.You will know if they are correct because they will not move one bit from the rail.Let me know if that does it. p.s. how many 6.6l tpi 3rd gens ya think is out there?