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#176 |
Registered User
Join Date: Apr 2012
Location: Virginia Beach, Virginia
Posts: 219
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Re: 77 Cheyenne meets Ramjet 350 by N2TRUX
Ive been looking for an EFI engine to drop in my 86 GMC and this RAMJET 350 is looking better and better everyday. There is only one thing that has me on the edge. I was reading that this engine requires 92 Octane gas and with premium gas on the rise at $4.35/gallon I will have to pass this one up. Are you running 92 octane? Or is it possible to run it with 87 without upsetting the engine?
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1986 GMC K15 4.3V6/SM465/NP205 will be converting to 5.3LS E-ROD/AA adapter/SM465/NP205 10 Bolt Axle Rebuild Tutorial: http://67-72chevytrucks.com/vboard/s...d.php?t=536415 |
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#177 |
Happy to be here
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Location: Cypress, TX
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Welcome to the forum. Im not sure where that info came from, but it is not corre t. I have never ran 92 octane, and my motor runs great.
I did a LOT of research at the time of this install, and looked at several options. There simply wasnt a better "efi package" option on the market. With the ever decreasing cost of doing an LSx conversion, you need to consider that too. When this was done a cheap LSx install would run around 8k.
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Follow me on Facebook and Instagram @N2trux.com Articles- "Jake" the 84 to 74 crewcab "Elwood" the77_Remix 85 GMC Sierra "Scarlett" "Refining Sierra" |
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#178 |
Registered User
Join Date: Mar 2011
Location: Rio Grande Zacatecas, Mexico.
Posts: 41
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Re: 77 Cheyenne meets Ramjet 350 by N2TRUX
Lord let me tell you that your truck and those hills are my inspiration, I never tire of seeing them again and again unfortunately where I am very difficult to get new parts for my cheyenne but slowly advancing the project and once again congratulations delas has a square body trucks best in the world if not the best.
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#179 | |
Registered User
Join Date: Apr 2012
Location: Virginia Beach, Virginia
Posts: 219
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Re: 77 Cheyenne meets Ramjet 350 by N2TRUX
Quote:
I was under the under the impression that premium fuel was required. The link below contains the exact instructions from GM. If you go to page 5, which lists the engine specifications, it states: "Fuel: Premium unleaded - 92 (R+M/2)" Now you have this exact engine in your truck and ive seen youve been running for quite awhile now, and to hear you say you were running regular is a huge sigh of relief because i cant afford to get 10 miles/gallon and pay for premium on my daily driver. But with the GM Instructions stating that premium is required, would the regular 87 octane gas cause problems for the engine? And if it does cause problems, would there be any other EFI engine that would be an easy swap for less than $6000.00 that should be considered?
__________________
1986 GMC K15 4.3V6/SM465/NP205 will be converting to 5.3LS E-ROD/AA adapter/SM465/NP205 10 Bolt Axle Rebuild Tutorial: http://67-72chevytrucks.com/vboard/s...d.php?t=536415 |
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#180 |
Registered User
Join Date: Apr 2012
Location: Virginia Beach, Virginia
Posts: 219
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Re: 77 Cheyenne meets Ramjet 350 by N2TRUX
__________________
1986 GMC K15 4.3V6/SM465/NP205 will be converting to 5.3LS E-ROD/AA adapter/SM465/NP205 10 Bolt Axle Rebuild Tutorial: http://67-72chevytrucks.com/vboard/s...d.php?t=536415 |
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#181 | |
Registered User
Join Date: Apr 2001
Location: DALLAS,TX
Posts: 21,964
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Re: 77 Cheyenne meets Ramjet 350 by N2TRUX
Quote:
Most GM ECU's simply tweak the timing to adjust for fuel quality. In the 02 TransAm (LS1/6) I drove, you could run 87 w/o issue..... it just didn't have the same power it would if using 92.
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67SWB-B.B.RetroRod 64SWB-Recycle 89CCDually-Driver/Tow Truck 99CCSWB Driver All Fleetsides @rattlecankustoms in IG Building a small, high rpm engine with the perfect bore, stroke and rod ratio is very impressive. It's like a highly skilled Morrocan sword fighter with a Damascus Steel Scimitar..... Cubic inches is like Indiana Jones with a cheap pistol. |
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#182 |
Registered User
Join Date: Mar 2012
Location: harrisville, ms
Posts: 377
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Re: 77 Cheyenne meets Ramjet 350 by N2TRUX
super truck great info and pics .................. on another note your wife calling you anal well she was being nice lol just pickin i get that from your daughter sayin the air filter cover looks like an ant eater or ardvark something like that and you didnt see the humor in it. there again i am sure you saw some humor in it at least now anyway. i gree it looked like a armadillo head with the screws in it. welded with a bracket looks 100 times better.
beautiful truck. and the shield/ covers make that ram jet just plum sexy. thanks for the write up and shared info.
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#183 |
Registered User
Join Date: Apr 2012
Location: Virginia Beach, Virginia
Posts: 219
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Re: 77 Cheyenne meets Ramjet 350 by N2TRUX
Well that makes me feel good about this motor, those ECU's are pretty impressive. I really appreciate the info
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1986 GMC K15 4.3V6/SM465/NP205 will be converting to 5.3LS E-ROD/AA adapter/SM465/NP205 10 Bolt Axle Rebuild Tutorial: http://67-72chevytrucks.com/vboard/s...d.php?t=536415 |
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#184 |
Happy to be here
![]() Join Date: Mar 2000
Location: Cypress, TX
Posts: 39,023
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Re: 77 Cheyenne meets Ramjet 350 by N2TRUX
The info you linked may be newer than my motor, but I'm pretty sure that was not there when we did the install on mine. I know it was not listed on any of the information when I did the research. Regardless, I can attest that I have never ran premium unleaded in mine, and it runs great. It might run better with higher octane fuel as Scot mentions, but we will probably never know.
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Follow me on Facebook and Instagram @N2trux.com Articles- "Jake" the 84 to 74 crewcab "Elwood" the77_Remix 85 GMC Sierra "Scarlett" "Refining Sierra" |
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#185 | |
Registered User
Join Date: Apr 2012
Location: Virginia Beach, Virginia
Posts: 219
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Re: 77 Cheyenne meets Ramjet 350 by N2TRUX
Quote:
__________________
1986 GMC K15 4.3V6/SM465/NP205 will be converting to 5.3LS E-ROD/AA adapter/SM465/NP205 10 Bolt Axle Rebuild Tutorial: http://67-72chevytrucks.com/vboard/s...d.php?t=536415 |
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#186 |
Registered User
Join Date: May 2012
Location: Florida
Posts: 5
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Re: 77 Cheyenne meets Ramjet 350 by N2TRUX
That is a beautiful truck! I am impressed with your desire for detail, it looks great!
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#187 |
Registered User
Join Date: Aug 2013
Location: Kentucky
Posts: 549
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Re: 77 Cheyenne meets Ramjet 350 by N2TRUX
Such a nice truck. One of my favorites!!
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#188 |
Registered User
Join Date: Aug 2013
Location: Kentucky
Posts: 549
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Re: 77 Cheyenne meets Ramjet 350 by N2TRUX
Do you have any pics of the interior?
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#189 |
Registered User
Join Date: Jan 2013
Location: Nacogdoches, Texas
Posts: 895
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Re: 77 Cheyenne meets Ramjet 350 by N2TRUX
I'm pretty sure this is the first time I have read this thread, I think I would remember it if i did.. lol I have always Loved the truck looking at it on instagram and on here.. but man, This thing is clean!
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Current Build 89 s10 ecsb 2wd 4.3/700r4 50k OG Miles Instagram- shaggin_s10 '86 Chevrolet C10 Custom Deluxe - Gen V 454 - 4l80e - welded 12 bolt (Build thread: http://67-72chevytrucks.com/vboard/s...d.php?t=611611 ) SOLD |
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#190 |
Still Learning
Join Date: Jul 2009
Location: Central Oklahoma
Posts: 10,108
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Re: 77 Cheyenne meets Ramjet 350 by N2TRUX
I think some update pictures would be nice Ken
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#191 |
Registered User
Join Date: Feb 2012
Location: Albuquerque NM
Posts: 3,053
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Re: 77 Cheyenne meets Ramjet 350 by N2TRUX
Interior pics perhaps...............
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SOLD -77 CHEYENNE SWB, LS SWAPPED -1976 SILVERADO YUBA GOLD/NEUTRAL (2-TONE) |
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#192 |
Registered User
Join Date: May 2012
Location: MacDill AFB\Tampa
Posts: 151
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Re: 77 Cheyenne meets Ramjet 350 by N2TRUX
Updated pics please.
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Science flies you to the moon; Religion flies you into buildings. LeMans Turbo build http://ls1tech.com/forums/forced-ind...rbo-build.html C10 build (twin-turbo) http://www.performancetrucks.net/for...didate-501987/ |
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#193 | |
Happy to be here
![]() Join Date: Mar 2000
Location: Cypress, TX
Posts: 39,023
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Re: 77 Cheyenne meets Ramjet 350 by N2TRUX
Quote:
I'm afraid update pics at this time would be pretty disappointing. I pulled the interior out to freshen things up. Then I bought an 84 GMC Sierra at the end of October, and I realized I had to make a choice. I could do the upgrades I wanted to the Sierra or the Cheyenne for Lonestar Throwdown, but there simply wasnt enough time in my schedule to do both. I opted to focus on the Sierra. I promise the 77 wont be neglected for long though. I am currently working with a group of vendors to make things fresh again. Stayed tuned for my plans. Until then take a look at my Sierra build thread - Refining "Sierra"
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Follow me on Facebook and Instagram @N2trux.com Articles- "Jake" the 84 to 74 crewcab "Elwood" the77_Remix 85 GMC Sierra "Scarlett" "Refining Sierra" |
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#194 |
Registered User
Join Date: Sep 2012
Location: Wa
Posts: 97
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Re: 77 Cheyenne meets Ramjet 350 by N2TRUX
Wow I'm behind on reading this thread but great looking engine bay. I'm just starting top coat paint on mine right now and am starting in the engine bay. Was agonizing over whether or not I should satin black a lot of it, glad I decided to go gloss after looking at yours.
Brian |
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#195 | |
Registered User
Join Date: Oct 2014
Location: Location:
Posts: 8,369
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Re: 77 Cheyenne meets Ramjet 350 by N2TRUX
.
. This swap turned out great - all the small details really came together to give the engine bay a really clean look! Is the Ramjet still performing well? . . Quote:
. Looking forward to following your interior updates for the '77 when the time comes. Having read all of your great threads here and seeing your attention to detail, it'll surely deliver when the time comes! Are you planning to keep the interior red? . .
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