Bringing TBI and Multi Port Fuel Injection to a New Level.     EFI Conversions and Tuning! Seattle to Portland! E-mail Tuning Consultant!
Page 2 of 2 FirstFirst 12
Results 16 to 24 of 24

Thread: GM TBI Injector size, color and part numbers

  1. #16
    Fuel Injected!
    Join Date
    Feb 2013
    Location
    Euless, TX
    Posts
    1,578
    Quote Originally Posted by mikeg205 View Post
    Orange / Black also came in Indmar Marine Application with 30PSI regulator in a 5.7 liter.
    I am guessing they are this part number?

    25170301

    Although they could just be normal 350 truck injectors. I ran a pair at up to 50 psi for thousands of miles. That was 20 psi base fuel pressure and a 4:1 rising rate regulator getting 7.5 psi of boost from under the Weiand 142. In about 1 year, I killed 3 well built 700r4s in about 20K with that setup.
    Last edited by Fast355; 11-28-2015 at 11:00 AM.

  2. #17
    Fuel Injected!
    Join Date
    Jul 2012
    Location
    Fresno, CA
    Posts
    422
    It looks like that's the correct number. I found a set on eBay: http://www.ebay.com/itm/Crusader-Mer...-/301647034737

    That's something I hadn't heard of before, thanks! I wonder why they went with the higher pressure and how much they flow?
    1973 K-5 Blazer, TBI 350, TH400, 1 ton axles & 38" SSRs'
    1975 280Z, TBI 350, 700R4
    1953 M-38A1, TBI Buick 231
    1951 Ford Panel, 5.3 with 4L80E

  3. #18
    Fuel Injected!
    Join Date
    Feb 2013
    Location
    Euless, TX
    Posts
    1,578
    Quote Originally Posted by fastacton View Post
    It looks like that's the correct number. I found a set on eBay: http://www.ebay.com/itm/Crusader-Mer...-/301647034737

    That's something I hadn't heard of before, thanks! I wonder why they went with the higher pressure and how much they flow?
    They run at higher pressure because they sit in a 454 TBI unit and feed 280-320 HP engines. Even the Marine 4.3s had a big block TBI on them making 210 hp.

  4. #19
    Electronic Ignition!
    Join Date
    Jul 2015
    Posts
    18
    I found info on these as I found these in my 1991 GMC Jimmy 5.7. The RIN-1001s are BWD Part number 57202P found here:

    http://www.oreillyauto.com/site/c/de...2521&ppt=C0024

    I can only assume since they are factory replacements for the "5235206 - Orange / Black - 61pph - 5.7L / 350 Cars/Trucks" they would flow about the same.

  5. #20
    Electronic Ignition!
    Join Date
    Jul 2015
    Posts
    18
    I did have one question for the group, why did they use the 170301 injector in the 94-95 454 for street application, and why did they use the same injector in the marine 5.7? Anyone know why they used larger injectors in the marine TBI?

    Are there any benefits to using the higher pressure TBI injectors? Any internal design differences that allowed the injectors to handle the higher pressure?

  6. #21
    Super Moderator Six_Shooter's Avatar
    Join Date
    Feb 2011
    Posts
    2,878
    The later 454 uses higher pressure (around 30 PSIG) than the early 454 (around 12 PSIG), so it may actually be that they are using the smaller injector in the 454, rather than the other way around. From a quick search those are about 45 PPH at 12 PSIG, which would make them flow quite a bit more at higher pressure.
    The man who says something is impossible, is usually interrupted by the man doing it.

  7. #22
    Fuel Injected!
    Join Date
    Feb 2013
    Location
    Euless, TX
    Posts
    1,578
    Quote Originally Posted by sfara002 View Post
    I did have one question for the group, why did they use the 170301 injector in the 94-95 454 for street application, and why did they use the same injector in the marine 5.7? Anyone know why they used larger injectors in the marine TBI?

    Are there any benefits to using the higher pressure TBI injectors? Any internal design differences that allowed the injectors to handle the higher pressure?
    The marine setups support and feed alot more powerful engines than the road going setups.

    One marine 350 I know of had L98/ZZ4 heads on it and was rated 315 HP with TBI feeding it. There was also a supercharged 502 that was around 600 HP and was dual TBI.

  8. #23
    Carb and Points!
    Join Date
    Jun 2016
    Location
    Topeka Kansas
    Age
    27
    Posts
    7
    I see conflicting data on the 5235206 Orange/Black. The truck 5.7 injectors, I am seeing fuel rates at 55 pph versus this forums listing of 61 pph. Is there an error.
    1988 V20 5.7tbi/Sm465/Dana60/14bff------1991 Z28 Camaro 5.7TPI/700r4-------1968 Mustang Coupe 302/c6

  9. #24
    Super Moderator dave w's Avatar
    Join Date
    Feb 2011
    Posts
    3,619
    Quote Originally Posted by zjlarson View Post
    I see conflicting data on the 5235206 Orange/Black. The truck 5.7 injectors, I am seeing fuel rates at 55 pph versus this forums listing of 61 pph. Is there an error.
    This forum has the correct flow for the 5235206 injector, 61 pph. When doing the math for Base Pulse Width (BPW), it's very clear that 61 pph is the correct flow for injector 5235206.

    dave w
    Last edited by dave w; 1 Week Ago at 04:41 PM.

Similar Threads

  1. Injector size vs HP = pressure math needed
    By EagleMark in forum GM EFI Systems
    Replies: 24
    Last Post: 03-18-2012, 06:27 AM
  2. Injector Pulsewidth
    By gregs78cam in forum GM EFI Systems
    Replies: 9
    Last Post: 07-12-2011, 10:14 PM
  3. Mr Injector and flow rates
    By EagleMark in forum Gear Heads
    Replies: 6
    Last Post: 05-03-2011, 11:27 AM

Tags for this Thread

Bookmarks

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •