Engine Swap

[Magnumb]

I am replacing my engine due to a head gasket. Any sugestions on a plug and play engine for a 1995 5.7 Yukon? I would like a little more power than the stock 200 HP.

 

Thanks

Justin

[Genuinefine409]

I am replacing my engine due to a head gasket. Any sugestions on a plug and play engine for a 1995 5.7 Yukon? I would like a little more power than the stock 200 HP.

 

Thanks

Justin

 

 

I know of a local engine builder that used to do a 275hp/380tq 350 for the TBI engines. it would be for you to get a nice cam from lunati or comp and that would give you a nice power increase over stock. i've heard from the parts manager at a local gmc dealer that doing the vortec head swap is a real power boost on these trucks. somewhere around 35-45 hp if you have a good breathing exhuast and he's seen as much as 60hp increase on trucks that already had a aftermarket cam installed. Vortec heads are really good and cheap, I use vortec bowite heads on my race car, i stepped up from old ported double hump heads and gained 80hp and 600 rpm.

 

If you are looking at getting a new engine maybe you can just get a short block, nice cam or stock cam, and do the vortec heads and the intake is expensive though, almost $400 i think. You can get your engine rebuilt and jsut buy the vortec heads and intake and put on, maybe thatll save you some money. A local Napa did an engine for me for under $600 two years ago.

[Magnumb]

I am looking for about 275 HP. Since I decided to install my own engine I am going with a brand GM Goodwrench for about $1700. I might install a Crane cam and headers but I have not made the jump yet. I would rather not fine tune the computer.

[adz55]

Forget local engine rebuilders, when it's all said and done you'll have a $2,000 old, rebuilt motor that'll just wear out in 3 or 4 years. Go with a GMPP 350/290 and you'll be happy for years to come with a dependable NEW motor. It'll also be a better way to go than upgrading a goodwrench.

 

http://store.summitracing.com/partdetail.a...mp;autoview=sku

[Genuinefine409]

Forget local engine rebuilders, when it's all said and done you'll have a $2,000 old, rebuilt motor that'll just wear out in 3 or 4 years. Go with a GMPP 350/290 and you'll be happy for years to come with a dependable NEW motor. It'll also be a better way to go than upgrading a goodwrench.

 

http://store.summitracing.com/partdetail.a...mp;autoview=sku

 

 

Forget that engine unless you're going to get a custom program. That engine peaks hp at 5100rpm and would pull to probably close to 5600 maybe more. The '96 vortec's peaks power at 4400 and mine shifted at 52-5500. that peak HP is way to high for stock timing,fuel, and trans shift points. you'd also be swapping out some other parts. You'd need to change the heads so your warrenty would be gone. you'd also need a new plexplate. If you'd want to go GM, go with a shortblock so you can get whatever cam you want and reuse al the other parts from you current engine. summitracing is a good group of people and they can hook you up with almost anything you'd need.

[Nytemare]

I dunno...the hp peaks at a high rpm, but the torque is where you want it

The 350/290 delivers 290 hp @ 5100 rpm and a solid 326 lb.-ft. of torque at 3750 rpm.

 

 

Theres a nice flat torque curve and is over 300ft-lbs from 1500 on up. Thats what I'd be looking for is a suburban, lots of grunt. Sure its not a fast engine, but it can pull a house off its foundation.

 

Its a nice low compression replacement engine and only requires 87 octane. I'd be doing this if it were me and the price was right.

[Genuinefine409]

Peak tq at 3750rpm is not what i'd want in a suburban. I'd say with the new LS engines that would be fine but the older trucks don't shift that high. In an old TBI 5.7 3750 just seems about 1,000rpm too high. Its all upper RPM power. you need peak tq below 3000 for grunt. here is a curve for a 5.7 vortec engine.

 

 

I'd much rather have something like this. you can easily buy the TBI vortec intake and not have to worry about changing the heads like on the 290hp crate engine which doesn't have the 72 degree center bolts like you would need and you'd also need at least a flexplate for the 290hp crate engine because its 2-peice seal.

 

I'm sure the 290 crate engine would run good but not like a engine that makes bottom end tq. If you pull a trailer you'll really appreciate the bottom end power. I think shift points are around 4200-4500? I can't remember anymore but just as the engine starts to pull hard it'll shift and feel like you're loaded down.

 

Whatever you do good luck and let us know how you make out!

 

Here is a few other popular engines and their curves.

 

 

[Nytemare]

I agree...3750 is a little high...but it doesn't drop below 300 ft-lbs either. Any engine pushing 300 off idle is gonna have lots of balls without even winding it out.

 

MY point is that the torque on that motor isn't really a curve...more of a horizontal line. Plus...all he has to do is swap his TBI stuff over to it. Its basically a direct replacement for his engine. It would be the easiest of all the swaps he could do.

 

The graph shown is also a run shown with a 600 cfm carb. The addition of a TBI will bring the peaks down the band a bit anyway.

[Genuinefine409]

The 290hp crate engine is an old style engine. The heads would need replaced and he'd need to get a new flexplate. the flexplates changed in 86 along with the rear main seal. 87+ engines had 72 degree center bolts and this eninge doesn't so the heads would need replaced. I'm sure it would work, its just there are better options and being able to make more useable power for the same price without having to swap parts.

[Nytemare]

Oh yeah...forgot, the 87+ heads are center bolt.

 

still, one of these with Edelbrock torker package would be pretty slick. Or even a set of Fastburn vortec heads and an LT4 hot cam kit.

 

 

This would be my personal choice....

http://www.gmperformanceparts.com/EngineSh...4&engCat=bb

I am a big fan of the 454.

[Genuinefine409]

I love the 454. My cousin had a dually with a 454 and 4.56 gears. it wasn't good for top speed but it never died down on any hills with anything he ever pulled with it. awesome power.

[Magnumb]

Thanks for all the info. I am going to buy an engine next weekend. 454 is way more than I need. I am going to get a Jasper direct replacment with a hotter cam. I was going to get the NEW gm crate but I hear those are made in Mexico and I would like to avoid buying somthing from there.

 

Jasper 350 TBI- $1781

New starter- $170

Motor mounts- $50

Manifolds- $160

Water pump$ 45

Cherry picker $80

Edlebrock Manifold- $350

Power steering pump- $180

Total- $2820