anyone run a ram jet 502?

[original balzer]

GM performance parts ram jet 502 i been looking at them for a friend when i realized the HP and TQ they make for the price and being a complete and NEW engine they are actualy realy appealing getting 500hp out of a big block is fairly easy but usualy cost alot and the ram jet 502 is built by GM cant get better than that can you?

balzer

 

[muddermilitia]

Well, they are like $9,000 right? and you get 500hp. My brother had a big block built up and it cost him a little over $6,000 and it makes an estimated 600-650hp. Everything but the heads and block were replaced so its almost brand new.

 

[Corey 78K5]

Yeah a big block could be built for 500+ HP for much less. On the flip side I'm sure a warranty is available with the GM engine.

 

[tiger9297]

I'm building a BBC right now for my K5. Dyno2000 says it should have about 390 HP and 525lb/ft. TQ. I'm going to have around $4200 in it. You could change the cam and up the HP I'm sure but I wanted LOTS of TQ.

 

[Leper]

Where does it make its power though? If it is at 5000 rpm, it wount do you much good climbing on rocks.

 

[beastofablaze]

a 502 will make tq like its going out of style no matter what the hell you do to it but you guys are forgeting one factor here. Fuel injection.

over 500 ft lbs from 2200 to 5200 rpm topping out at 565 ft lbs of tq at 3400 not to mention 502 ponies. not too shabby

All forged etc heres the link http://www.jegs.com/webapp/wcs/stores/servlet/CategoryDisplay?storeId=10001&catalogId=10002&catalogIdentifier=Jegs_Direct&categoryId=21351&parentCategoryId=10763

Yeah you might be able to build a 600 horse bb for 6g's but you forgot this thing is fuel injected and tuned just about perfectly from the factory. It'll run where carbs will stall, won't need constant tuning in different altitudes and get better gas mileage.

If the ram jet 502 is the same type of FI setup as the ram jet 350 then you can make minor mods to the fuel map with the existing setup but nothing major... infact your pretty much stuck with that unless you can program FI.

Put into factor the time, blood and sweat of finding the right efi stuff doing the research and figuring out how to tune(believe me its not for everyone, I'm in the middle of just that right now) and its not as horrible as it may sound but still a little pricey.

I'll have a mpfi 440 hp 475 ft lb N/A smog legal(yes i said smog legal) sb using afrs, edelbrock mpfi, a prominator, wideband, etc for about 7g's but its no joke. Efi is very complicated but your average joe can do it if they have the attention span to read through the stuff on thirdgen.org. It just takes alot of time. The ram jet is a badass motor but its hard to justify spending that kind of money on something that you can't modify without spending another grand or so on the efi then again its not like its low on power. As you can tell I'm on the fence.

If you got the money more power to you.

 

[dyeager535]

Ram jets aren't closed loop systems either. (no O2 sensor)

 

[tiger9297]

Where does it make its power though? If it is at 5000 rpm, it wount do you much good climbing on rocks.

Dyno2000 estimates:
2000- 523lb/ft
2500- 525lb/ft.

at 4000 it drops below 500lb/ft
4000- 490lb/ft.

peak HP is approx. 390 @ 4500 RPM

This will be a MPFI engine using the Howell MPFI. This is a relatively inexpensive MPFI unit but it's adequate for what I'm doing. I'm not looking for "race" quality parts. Just something reliable and decent power. I tow a 28 ft. camper with this truck quite a bit. I run 2400-2600 while towing. I wanted my peak TQ right there.