Thread: Sledgehammer build

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Is it possible to build the sledgehammer motor while using the stock fuel injection system? If not, what would I need to change.
I've bought a 5.7 vortec with computer, wiring, etc. Looking to get a flat 400+ torque curve all the way through the rpm range

Thanks

Originally Posted by whabamdo

Is it possible to build the sledgehammer motor while using the stock fuel injection system? If not, what would I need to change.
I've bought a 5.7 vortec with computer, wiring, etc. Looking to get a flat 400+ torque curve all the way through the rpm range

Thanks

I have a recipe for a 383 making 450 ft/lbs from 2000 to 4500 using a 650 carb if that would help.

that would be awesome, but this motor is in fantastic shape, so I really don't want to spend the money to stroke it, even though I would love to.
AND since I have the factory fuel injection, I would like to use it if possible.

Originally Posted by techinspector1

I have a recipe for a 383 making 450 ft/lbs from 2000 to 4500 using a 650 carb if that would help.

Mr. Techinspector I would like that recipe, please

You might want to review this link.EFI for every guy.It has some good stuff in it.

http://www.popularhotrodding.com/tec...guy/index.html

Originally Posted by Bruce lee

Mr. Techinspector I would like that recipe, please

Small block Chevy, 4.030" X 3.750"
6.000" rods. Scat makes a nice cast STEEL crank for use with 6" rods. Use a 400 damper and 400 flexplate for external balancing. Balance will need to be fine tuned at your machine shop.
http://www.summitracing.com/parts/SCA-935056/
KB164 19cc pistons (or anybody's 18-19cc pistons for use with a 6" rod and 3.750" stroke)
http://www.kb-silvolite.com/kb_car/p...tails&P_id=161
RHS 170 cast iron heads, 64cc chambers (makes 9.6:1 static comp ratio)
http://www.summitracing.com/parts/RHS-12410-01/
Use an Edelbrock 7101 or Weiand 8150 with 600/650 carb.
http://www.jegs.com/i/Edelbrock/350/7101/10002/-1
http://www.jegs.com/i/Weiand/925/8150/10002/-1
Use long-tube, equal-length 1 3/4" headers of your choice. And by the way, if the headers don't fit exactly on your application, use a Sawzall or cutting torch to cut away whatever is in the way, then weld the parts back in with altered pieces after you get the headers in. NOTHING SHOULD EVER GET IN THE WAY OF FITTING HEADERS. NEVER DENT OR TRY TO BEND A PIPE TO MAKE THEM FIT.
Custom cam. 208/213, 0.450"/0.450", Intake centerline 100.0, Exhaust centerline 108.5, Lobe separation angle 104.3, timing events 4/24/35/-2, overlap 2 degrees.
RPM HP TQ
1000 67 354
1500 119 416
2000 170 447
2500 214 449
3000 265 464
3500 314 471
4000 353 464
4500 385 449
5000 400 416
5500 369 353
Peak volumetric efficiency 84.0% @4000
Peak BMEP 185.6 @3500
This motor needs to be in a pickup truck with a 3.73 gear and a 2000 stall converter. It should rip the tires off in all gears stoplight to stoplight on pump gas. It would be ok with the stock converter and stock gear, I just think that to optimize the combo, it should have gears and converter. I see no reason this same combo wouldn't work with EFI. I know that normally, cams for EFI are ground with a wider LSA, so that would be something you would want to discuss with the cam grinder. Getting to this enormous torque at low rpm's required me to use a very short LSA.

So does anyone know if i can still use the stock fuel injection?

anyone know?

Originally Posted by whabamdo

So does anyone know if i can still use the stock fuel injection?

I suggest you couldn't use the stock fuel injection with out mods.It's kind of the reason behind the link I left for you.In that are companies that do use some of the stock parts that have been mod'ed.

I too would love to be able to afford a Edelbrock system.But I am convinced a EFI system can be had and effective for a 383 reasonably.That it worth the effort for the benefits it offers over carbs.

One tip I can give you is to be careful buying old Edelbrock systems that are not supported by them any longer.The other one is the Fast Systems is everytime I looked at that is seemed to get a complete system,it nickeled/dime you to the same costs or more than the ones that sold a complete system in the first place.

So the long and the short of it-please do review the link I left.

You can get 400 hp from a stock fuel injection system. But first we will need to know what engine/heads you have & what kind of fuel injection system is on the engine. You will probalay will need a custom tune whatever you do. Stock tunes tend to lean more to the emission & fuel mileage side.

I think you will find the answer to your question in this ref link.It's more than I can write myself and is easier to just post the link.Please review it and get back to us.

http://www.tbichips.com/305mods.htm

BTW-it does talk about HP ratings to 450 or more.

Is this a tbi engine or vortec. The tbi engine does have center bolt valve covers but it is not a vortec. The easiest way to tell is to count the intake bolts. If it has 8 bolts that go straight down then it has vortec heads on it. If it has 12 bolts that are at a angle then it is a gen I small block. The best thing to do is to establish what your base is. There are so many different tbi engine out there. Don't forget these engine have been around now for 20 + years. I would start by getting the cast numbers off the block, heads, intake, throttle body, & injectors

I did read that entire efi for every guy link. But most of it seemed to me to be all new systems. ? Most of them I had seen before, but there were many new ones I hadn't seen that were interesting. I'll go back and look at it again.

its a vortec. does the tbi article still apply or is this a diff type of fuel injection?

p.s. the build i was gonna try to duplicate WITH using my fuel injection instead of the carb http://www.popularhotrodding.com/fea...ine/index.html