1998 k1500 5.7 350 to 383 stroker

Okay guys I'm wanting to do the swap. I'm going to either put a 0411 in or leave the black box for now. I realize they will have to be tuned but what EFI systems would be best for plug and play? I'm wanting to keep everything thing else stock so I don't have to change plugs and sensors. Also will a rebuilt stock trans hold up if the engine is pushing 400 hp?

your probably going to want to put a little extra work into the stock trans if your planning on 400hp especially if your rebuilding it anyway. 4l60's have a pretty good selection of aftermarket performance parts.

The stock trans ain't good for 250hp. and 400hp maybe out of the factory intake setup range

Jaydenluke44 said:

Okay guys I'm wanting to do the swap. I'm going to either put a 0411 in or leave the black box for now. I realize they will have to be tuned but what EFI systems would be best for plug and play? I'm wanting to keep everything thing else stock so I don't have to change plugs and sensors. Also will a rebuilt stock trans hold up if the engine is pushing 400 hp?

Click to expand...

Switching to a 0411 computer requires de-pinning and re-pinning correctly your harness to the new computer. It is not plug and play.

Only the stock based EFI system would be remotely plug and play. Nothing else is a drop in and go.

The factory injection system is good to approximately 400 hp, the injectors can only flow so much.

Wynjammer has different injection spiders available for more fuel flow in pounds per hour.

http://www.wynjammer.com/Vortec_Fuel_Injection_System.html

You WILL require custom programming based on what you want to do. Easier to keep the black box computer, Blackbear performance can tune it for you based on your input and combination.

http://blackbearperformance.com/

Sure you can rip out everything, go to a complete standalone system. This costs real money, and you will have to engineer solutions to other problems that crop up. If you aren't comfortable with a soldering iron and circuit schematics, and thinking on the fly, this is not for you.

A rebuilt transmission may or may not live behind that engine, it is dependent on many unknowns. 3-4 clutch packs are an issue with most all of these, the steels are far too thin and the cover flexes, forcing the discs into a cone shape.

THIS is a video of the above, at only 110 PSI apply pressure. 190+ will cause even greater deflection.


Sonnax makes a HD part.

www.sonnax.com/parts/2451-smart-tech-input-housing-kit


Sure, you can put a 300M Maraging steel output shaft in the transmission, and change all sorts of components to make it live behind a lightweight 1000 hp car. Put the same transmission behind a 5200+ pound truck and decide to trash on the skinny pedal with a load on the truck and a trailer.... it will not like that.

Factory manifolds and Y-pipe aren't going to help out. You will need headers and full exhaust.

By the time you realize that dumping $2G into the transmission, another ~ $800 into the exhaust, then tuning, upgraded fuel pump, ~ $7-800 on a spider, plus the motor and YOUR labor, it quickly lacks feasability.

Not to mention, I would install a new radiator and transmission cooler at the time of the upgrade.



Not trying to dissuade you from taking this path if you desire, but there are better options, you could take that $6-7000 dollars you will spend and put it towards a newer vehicle. `

411 is hands down better than the blackbox, I've tuned both and there is no comparison. Absolutely commit to that and I would highly recommend ponying up for the 4L80 swap. Nothing beats peace of mind as a built 4L60 is still a maypop.

If you go 0411 coil over plug the motor wont run as is you need a tune . Noway around it . You need spark tables from a fbody .
If you go 0411 with distributor your good to go.
The 0411 is better than the blackbox . If you go coil over plug you can use any ecm for the reluctor. . If I could choose again I would of went 58x gen4 ecm.
Depends on the manifold you choose . I used the assualt SBC efi intake for my setup with a ev1 /ls1 style injector but fast makes injectors extenders if you get the smaller 4.8/5.3/6.0 ls3 injectors.
If you choose another ecm do your self a favor get the injectors maf map & iat to that ecu. Pick and pulls are great for that.
If you have the money buy the tuning device you want. It gets expensive quick and no one will give you a mail order tune that right on the money. HP tuners starts at 400. That would be a tune and dyno time easy.