I recently ordered some injectors from GM using a part number off the archives here on thirdgen, thinking that they would be the yellow/brown Caprice police cruiser injectors. Instead I got the blue 454 injectors. Will these still work on a 350? I'm using a stock TBI unit, and will be making close to 300 horses, maybe a little more. My dealer charges a 20% return fee for special order parts, so I'd like to use them if I can!
Thanks

 

Yes, they can work.
They are not exactly perfectly sized.
They are not plug and play.
Some minor custom programing will be required to make them work in the car.

------------------
1988 T/A,
9" Ford, 3.50 gears, Auburn posi, 700r4 -w- 2100 converter, 360ci, 9.8:1 cr,
AFR 195 Heads, Weiand #7525 intake, Lunati roller 219/227, .479/.480, 112 LSA
Holley 700cfm 4bbl on TBI truck 7747 computer and chip by Howell-EFI

 

What part number did you order? We should correct the archive.

 

BTW, if anyone knows the CORRECT p/n for the caprice injectors, please, please let me know. I think that I'm going to go with them, since I already have a caprice chip
thanks

 

I'm pretty sure the P/N I used was 17112560 from snuf's injector chart. Check the archives. I'm not completely sure that this is the number I used, but I will check when I get home.

 

If they are too big for you, I'll buy them off of you if unused with warranty.

 

My notes show the 65lbs/hr Police injectors as part# 17112412. I believe the regular Caprice 55lbs/hr units are 17112493. You probably want to double check this at the dealership.

 

Snuf, wudyou do?

 

Fastbroker, I would want way more than you want to pay for them (most likely). If you can get me the caprice police injectors, I will definitely swap even.

 

uuhhhhhhhhhh?



how about we find out what the number is before we say its my fault. besides, i just went by what my parts guy gave me

wait a minute, i just checked, i dont even have that number labeled in my delco catalog.
which means, if thats the number from the chart, it was derived from somewhere else, from another chart that was partial etc..

thats not MY chart guys. its a comilation

but im sure you will be able to find a buyer if you cant use em.

 

Hey snuf, I didn't mean to implicate you in any wrongdoing. You've answered a lot of questions for me before, and always given some of the best advice on the board. I was just letting people know where they could find the chart in the archives so they know to watch out. I'm not peeved at all . I realize that things like this happen. Mistakes are made. In fact, it's my fault for not double-checking. So, if anyone wants to swap me some Caprice injectors for some 454 ones, e-mail me. I'll swap ya' even. They're brand new.

 

Normally I wouldnt say anything.

I dont know p/n's but most caprice 350's came with 61lb injectors.

55lb injectors can support 280hp after that BPW and injector cycle is 100% (which is bad). These are in all 305's

61lb injectors can support 360hp(same applies from above). These are in caprices

65lb injectors can support 400+hp
These are in most COP cars and trucks

68lb injectors can support alot of ponies.
These injectors are only in 454's.

Do you really need bigger injectors???

 

You left out the fuel pressure thats required to make that much HP. Those injectors mentioned will not support the numbers listed without increased FP.

 

Your right.

The 55lb can handle 18psi before your screens tear sometimes earlier.

61lb I've had mine to 15psi on 330hp easy

65lb Which I've used still set at 15psi seemed to be overkill. They were cycling at only 65% WOT

Now the 68's and 80's were used on big blocks by truck guys so I could'nt tell you w/o lying.

 

I was under the impression that the 454 injectors were 80 lbs. Now I'm really confused. If mine are only 68, then according to those above numbers, there's really not much difference between the 454 and the cop injectors. ??? Can someone help us out?

 

How did you make 330hp with less than 75lbs/hr per injector?

I'd like to see the BSFC sheet on that engine.

 

The 80lbers came in the Holley TBI.

And yes the 454TBI came wih 68lbers
and there is a difference between 65 & 68
One being pulse rate and secondly cycling duty is lower for 68 on the same engine.

 

I have my dyno sheet somewhere.
it was 330.6hp/374.8ftlbs torque
There was no build sheet. Just worked overed frankenstein parts.

 

So what would happen if I used the 454 injectors with a caprice cop chip? Would this be disastrous?

 

Sheesh. Someone's gotta have the right part number for the Caprice cop injectors. Does anyone out there have a set they want to let go?

 

Brake Specific Fuel Consumption

It will be listed on your dyno sheet. I'm curious as to the bsfc numbers around peak torque and around peak horsepower.

 

No. The chip really doesnt alter that much.
Its just the same as the 305chip just with a little different fuel/timing curves. no biggie.

Oh yeah the motor was out of the car when it was dyno'ed. So do the math on rear wheel hp.

 

So it would be ok then? To use the 454 injectors with the caprice chip? What would be better?

 

I've got a 454 TBI with Caprice injectors that I want to sell, but I want to get 200.00 for it.

Its in great shape.



------------------
Kelly 'GhoSSt' Rosato
1996 Impala SS, 383 LT4 (14.65 up here, 13.24 lower)
1984 Firebird, +.060 350 (Vortech Heads, HOT Cam, and schtuff)
1993 Caprice, 5.7 TBI (stock . . . FOR NOW)

"And if you wrong us, shall we not revenge? Revenge. The villany you
teach me, I will execute, and it shall go hard but I will better the
instruction."

Shylock in Act III, Scene I of 'Merchant of Venice' by William Shakespeare

 

If you use 80pph injectors with an OEM chip on a 350, you're in big trouble unless you turn your FP waaaaaaaaaaay down. You need at LEAST a 350hp motor to be able to run those injectors and, even then, can only run them with a custom PROM.

As far as I can tell, 55pph injectors came on GMC/Chevy 350cid pickups, not 65pph injectors, BTW.

 

But I thought the GM 454 injectors were 68 lb.???? This doesn't sound too far from the caprice cop injectors at 65. BTW, I'll be using a hypertech chip for a caprice cop car.

 

I don't when 68lbs/hr units were used in the BBC.

I do know these were used in the BBC. THe flow test ran at 10psi.

Late 17112560 Blue/Black are 75lbs/hr static

Early 17111784 DrkRed/DrkBlue are 90lbs/hr static

Credit goes to W. Sherwin for flow testing.

 

i have a 454tbi on my truck which is brand new from gm and they have the blue/black color codes for 80lbs.

Color code Application Flow rate part #

Black/White 1-3/8" bore 2bbl, from 2.8l truck ??? GM 5235430 *RPD

Yellow/Blue 4.3L ??? GM 5235203 *RPD

Green/White 5.0L 40 lb/hr GM 5235279 *RPD

Orange/Black 5.7L pickup 55 lb/hr GM 5235206 *RPD

Yellow/Brown 5.7L Cop Car 65 lb/hr ???

Blue/Black Late big block pickup 80 lb/hr GM 1708430 *RPD

Dark Red/Dark Blue big block pickup 90 lb/hr GM 5235231 *RPD


hope this helps.

i tuned my 383 to a 120bpw, i found 115 to be lean at mid range.