I just bought JRinks DR500s and so now to take advantage of the bigger turbos I'm looking for bigger fuel injectors. I was wondering what the difference between the DSM 450 blue tops and black tops are?

Also, I've noticed many walboro fuel pumps, and a few Supra fuel pumps. Do they both fit well in the stock location, or is one easier than the other?

Thanks in advance.

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The blacktop 450s are from the 2Gs and have a dual spray pintel cap that aims the fuel at the valves vs the 1G (manual tranny) 450 bluetop injector's single spray pattern. (1g turbo automatics had 390cc grey top injectors)

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06 Blue EVO 9

Don't know much about the Supra pump, but the Walbro is a drop in pump and doesn't pose any installation problems, except (big caveat here) being able to successfully remove the fuel line coming out of the tank. It's a weird L shaped hard pipe that, even when using a line wrench, you likely will never pop loose. Best to remove the lines from underneath the car to minimize bending the shit out of that hardline. And unfortunately, you can't use a torch to loose everthing up. Replacing the pump on a rusted car (hell, even non-rusty) is a pain. Make SURE to use line wrenches and pb blaster and lots of cussing.

Seriously though, IF you get lucky and your fuel line breaks free, it can be changed out in under 40 minutes.

As for injectors. Unless you're trying to go budget class, jump to 550s instead of 450s. You can find used 550s for the mid $200 range and they'll allow you a little bit more oompfaloompfa than 450s. However, I'm not saying 450s won't do the job, they will, at least on the street. But if you wanted to hit the track and crank up boost with race gas and 19psi or so with the dr500s, 550s would be a better alternative.

Another option is to get 450s to save cash, then spend a Benjamin on a adjustable FPR so you can raise base pressure if necessary.

There's really no wrong answer, it's all personal preference. Then again, I guess swapping out your 360s for N/A injectors would be an example of a wrong answer.

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The Supra pump and Walbro are very similar. Both are drop in replacements. The Supra pump has a greater pumping capacity vs. the Walbro. The biggest downside with the Walbro is the "humming noise" that many experience (if you have an upgraded exhaust or use your radio all the time, you probably won't notice it). However, the Walbro costs about $100 and the Supra costs $200.

Brad

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Brad
92&93 RT TT

Mods:
TD04L 13T's | Alamo Side Mount Intercoolers | RC 550 cc injectors | Supra fuel pump | SBC DXD 6-puck | 3SX Poly Motor Mount | TySpeed DP w/ TP | custom Magnaflow exhaust | DSBC | S-AFC | + much more

it took me about a week to get mine off damn line was stuck on. i sprayed that line about 5 times a day for almost a week before i finally got it off. So if you are going to get a new pump, id suggest spraying that now. Just giving my 2

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-Out since June 05'
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1991 Stealth R/T Red
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-Came back to life on 8/04/07
-Blew the motor again on 11/25/07

The noise of the walbro isn't nearly as bad as people make it out to be. If it does bother you, an old DSMers trick is to wrap the pump in dynomat.

Here's a good site comparing a few pumps.

http://www.roadraceengineering.com/fuel ... wrates.htm

Note: The denso pump sold at DR is 310lph at 43psi (14volts). (this is the one I have in my car)

Thanks for the info.

I guess if the walbro pumps whine, and I already have toyota denso relays running the pump, why not get a toyota pump. I'm a little hesitant to buy a fuel pump off from e-bay, and if I head into the local toyota stealership to buy a pump they are going to ask me what year, model, and other fun stuff. Is there any specific pump that we want, or any pump that fed a 2JZ turbo supra works? Extra flow does not suck, as I would like to experiment with Nitrous this summer also. At least until I blow my engine up.

The reason that I was looking into DSM injectors is that I thought they were plug and play, and I don't know any 550 injectors that are. Greddy sells 550 injectors, and over half of the additons I've put on my car already have been greddy. I haven't had reason to complain about their quality yet. what do you guys think? Is the low resistance 2-3 ohm what is needed?

http://www.prostreetonline.com/buy/greddy_fuel_injectors/13500055/

I wouldn't mind buying new injectors just for peace of mind. If I did by used I would send them out to get cleaned and flowtested anyway.

As soon as the car comes out of storage I will begin spraying penetrating oil on the lines. (It's currently about 20 miles away in a storage shed with my cousin's kit car) I have already done the fuel pump re-wire, but will this require getting a different FPR anyway, or will the supra flow/pressure be around the same as the stock unit when at 10 volts? Or at least close enough that a new FPR isn't neccesary.

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It's a "good idea" but not required. It'll give you more or less feul if you need it and will not get "over run" like the stock one, but truthfully, you maybe fine without it. My car is fine without one. I know it would be better with one, but there's other things I'd rather spend the $$ on right now.

b.t.w. RC, Denso, DSR... all make injectors that are "plug-n-play" just like factory. How much are Greddy injectors -vs- Densos?

kk~

I believe Greddy injectors are Nippon Denso injectors. They all seem to be about the same price except the RC injectors are typically 30 dollars less. 110~120 vs. 80~95. Greddy injectors 90 bucks on e-bay... Just don't like ebay for some things.

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Bad decisions make good stories.
Look at it! LOOK AT MY @SS AND TELL ME IT'S PRETTY!