Chevy Ram Jet 350 crate engine
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From: MI
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From: P'cola
Car: 1991 Z28 Camaro
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Originally posted by Gecz28
i think the ramjet is a good motor. but the only thing i dont like is that you cant modify it at all! it is what it is and thats that!
i think the ramjet is a good motor. but the only thing i dont like is that you cant modify it at all! it is what it is and thats that!
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the ramjet comes as a complte 'kit'. engine wiring and computer. its a sealed unit! you cant change the chip or modify it. if you wanna add parts to flow more air, its pointless cause the computer will only send enough fuel to feed the parts it was originally designed to work with.
Conclusion
Converting to electronic fuel injection can be a daunting proposition for a first-timer unsure of the intricacies of this “newfangled” technology. With its supplied computer and wiring harness, the Ramjet is a true turnkey, plug-and-play EFI crate engine. It fired up and ran flawlessly right out of the box with no tuning required. [B]However, the Ramjet’s computer control, developed for use in boats, is a completely sealed unit, and it’s not easily reprogrammable.[B] This means you can’t go in and change the cam or heads or add nitrous or a blower and reprogram the fuel and spark curves. The Ramjet is what it is and that’s that, which is a great crate package for anyone who wants the convenience and drivability of EFI without major cost and hassle.
Converting to electronic fuel injection can be a daunting proposition for a first-timer unsure of the intricacies of this “newfangled” technology. With its supplied computer and wiring harness, the Ramjet is a true turnkey, plug-and-play EFI crate engine. It fired up and ran flawlessly right out of the box with no tuning required. [B]However, the Ramjet’s computer control, developed for use in boats, is a completely sealed unit, and it’s not easily reprogrammable.[B] This means you can’t go in and change the cam or heads or add nitrous or a blower and reprogram the fuel and spark curves. The Ramjet is what it is and that’s that, which is a great crate package for anyone who wants the convenience and drivability of EFI without major cost and hassle.
Car Craft.....
Conclusion
Converting to electronic fuel injection can be a daunting proposition for a first-timer unsure of the intricacies of this “newfangled” technology. With its supplied computer and wiring harness, the Ramjet is a true turnkey, plug-and-play EFI crate engine. It fired up and ran flawlessly right out of the box with no tuning required. However, the Ramjet’s computer control, developed for use in boats, is a completely sealed unit, and it’s not easily reprogrammable. This means you can’t go in and change the cam or heads or add nitrous or a blower and reprogram the fuel and spark curves. The Ramjet is what it is and that’s that, which is a great crate package for anyone who wants the convenience and drivability of EFI without major cost and hassle.
Conclusion
Converting to electronic fuel injection can be a daunting proposition for a first-timer unsure of the intricacies of this “newfangled” technology. With its supplied computer and wiring harness, the Ramjet is a true turnkey, plug-and-play EFI crate engine. It fired up and ran flawlessly right out of the box with no tuning required. However, the Ramjet’s computer control, developed for use in boats, is a completely sealed unit, and it’s not easily reprogrammable. This means you can’t go in and change the cam or heads or add nitrous or a blower and reprogram the fuel and spark curves. The Ramjet is what it is and that’s that, which is a great crate package for anyone who wants the convenience and drivability of EFI without major cost and hassle.
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From: Cincinnati, OH
Car: '90 RS
Engine: 377 LSX
Transmission: Magnum T56
Originally posted by Gecz28
Car Craft.....
Conclusion
Converting to electronic fuel injection can be a daunting proposition for a first-timer unsure of the intricacies of this “newfangled” technology. With its supplied computer and wiring harness, the Ramjet is a true turnkey, plug-and-play EFI crate engine. It fired up and ran flawlessly right out of the box with no tuning required. However, the Ramjet’s computer control, developed for use in boats, is a completely sealed unit, and it’s not easily reprogrammable. This means you can’t go in and change the cam or heads or add nitrous or a blower and reprogram the fuel and spark curves. The Ramjet is what it is and that’s that, which is a great crate package for anyone who wants the convenience and drivability of EFI without major cost and hassle.
Car Craft.....
Conclusion
Converting to electronic fuel injection can be a daunting proposition for a first-timer unsure of the intricacies of this “newfangled” technology. With its supplied computer and wiring harness, the Ramjet is a true turnkey, plug-and-play EFI crate engine. It fired up and ran flawlessly right out of the box with no tuning required. However, the Ramjet’s computer control, developed for use in boats, is a completely sealed unit, and it’s not easily reprogrammable. This means you can’t go in and change the cam or heads or add nitrous or a blower and reprogram the fuel and spark curves. The Ramjet is what it is and that’s that, which is a great crate package for anyone who wants the convenience and drivability of EFI without major cost and hassle.
and i think its a little pricie for 350 hp. i know it is entirely complete! but almost 5000 buck for 350hp. i dont know? i mean for $2200 you can put the 350ho under your tpi, with a little modifiction. or you can pay $3200 and get the complete 350, carb to pan! thats easy! you can easily built a motor yourself cheaper and get the same results if not MORE power!
yeah the manufacture has to prgram the computer. sure the 430hp is great. but not the ramjet 350. still you cant modify the 430 either! you can get the engine with more power but YOU personally cant modify it!
Joined: Feb 2001
Posts: 13,756
Likes: 560
From: Cincinnati, OH
Car: '90 RS
Engine: 377 LSX
Transmission: Magnum T56
Originally posted by Gecz28
yeah the manufacture has to prgram the computer. sure the 430hp is great. but not the ramjet 350. still you cant modify the 430 either! you can get the engine with more power but YOU personally cant modify it!
yeah the manufacture has to prgram the computer. sure the 430hp is great. but not the ramjet 350. still you cant modify the 430 either! you can get the engine with more power but YOU personally cant modify it!
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From: las vegas
Car: '92 droptop bird
Engine: 5.7L,mild cam etc.
Transmission: modded 700r4 w/2600
you can have the small ecu reprogramed by arizona speed and marine for a veriety of combos,went through this a year ago,the factory setting has it running rich so A.S.M. has an o2 mod,can also tune for larger cams,bigger valves etc....the yellow r/s with that 350/6spd and 4.10s ran a 13.10 not bad in my book,only drawback NO EGR provisions....
Last edited by gen3z; Jan 22, 2004 at 11:36 PM.
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From: Charleston, SC
Car: 91 Camaro Vert
Engine: 02 LS1, HX40
Transmission: 2002 LS1 M6
btw, nothings stopping any of you from sticking the ramjet manifold, fuel rails, ect on a car and using a TPI ECM.......
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That topic was discussed a couple of years ago, if memory serves (someone was doing it). There are some sensor issues. And lack of EGR. But, you're looking at PROM tuning, anyway.
I don't know anything about the RamJet except what I've read. I've read it's an open-loop system, so if ASM is making a feed-back system, that would be a big improvement. If it is open-loop as-delivered, the mag was pretty irresponsible passing it off as a viable street engine (can you say emissions testing?).
I've also read the ECM programming is not friendly to changes, so as mentioned, you change something (like cam or head flow), you go get a different ECM. Perhaps ASM has also addressed that.
I don't know anything about the RamJet except what I've read. I've read it's an open-loop system, so if ASM is making a feed-back system, that would be a big improvement. If it is open-loop as-delivered, the mag was pretty irresponsible passing it off as a viable street engine (can you say emissions testing?).
I've also read the ECM programming is not friendly to changes, so as mentioned, you change something (like cam or head flow), you go get a different ECM. Perhaps ASM has also addressed that.
Supreme Member

Joined: Jun 2001
Posts: 9,550
Likes: 4
From: Charleston, SC
Car: 91 Camaro Vert
Engine: 02 LS1, HX40
Transmission: 2002 LS1 M6
Originally posted by five7kid
That topic was discussed a couple of years ago, if memory serves (someone was doing it). There are some sensor issues. And lack of EGR. But, you're looking at PROM tuning, anyway.
I don't know anything about the RamJet except what I've read. I've read it's an open-loop system, so if ASM is making a feed-back system, that would be a big improvement. If it is open-loop as-delivered, the mag was pretty irresponsible passing it off as a viable street engine (can you say emissions testing?).
I've also read the ECM programming is not friendly to changes, so as mentioned, you change something (like cam or head flow), you go get a different ECM. Perhaps ASM has also addressed that.
That topic was discussed a couple of years ago, if memory serves (someone was doing it). There are some sensor issues. And lack of EGR. But, you're looking at PROM tuning, anyway.
I don't know anything about the RamJet except what I've read. I've read it's an open-loop system, so if ASM is making a feed-back system, that would be a big improvement. If it is open-loop as-delivered, the mag was pretty irresponsible passing it off as a viable street engine (can you say emissions testing?).
I've also read the ECM programming is not friendly to changes, so as mentioned, you change something (like cam or head flow), you go get a different ECM. Perhaps ASM has also addressed that.
yea you have to burn a PROM for the EGR delete.. but as far as i recall, thats it...
there was a thread a few weeks ago with someone trying to do this.. apparently, the manifold isnt that much at all from GM..
ASM is making a closed loop version and conversion kits... i also understand they will do custom tuning for that ECM...
the magazine and GM point out several times that this engine is NOT for "emissions controled vehicles"... so technicly, its a "illegal" swap.. like the stealthram.
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