Author Topic: engine swap??  (Read 3930 times)

Offline Captkaos

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Re: engine swap??
« Reply #15 on: September 26, 2008, 10:51:34 AM »
Which motor swap are you talking about?
Most likely it will be 2 bolt, for a street vehicle, that is plenty strong.
Any Heads will work on the TBI motor, Vortecs will pick you up a good 50hp over the stockers.  The only Downside it you MUST get a Vortec intake.  Not a big deal though.  GMPP makes a Vortec TBI Intake.
Are you willing to get some chips burnt or are you wanting to stay within stock operating parameter?

For a TBI crate, I would look at this one: http://paceperformance.com/index.asp?PageAction=VIEWPROD&ProdID=42937

« Last Edit: September 26, 2008, 10:59:46 AM by Captkaos »

Offline lawdog49

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Re: engine swap??
« Reply #16 on: September 26, 2008, 11:02:39 AM »
upon researching via several forums- seems the TBI is somewhat limited on HP capability, so maybe the 383 idea won't work so well without substantial tbi mods. ideas on that?  i suppose i could always find a vortec motor- or buy a crate vortec motor, and put the vortec/tbi manifold on there, get a few tbi mods from CFM, and get a chip burned (from where i don't know).

ahh, the choices are endless- could rebuild my 350/add vortec heads/torque-y cam/prob require a chip too i suppose.......
1991 GMC Suburban 1500   -   5.7/AT/4x4/TBI

Offline Captkaos

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Re: engine swap??
« Reply #17 on: September 26, 2008, 12:47:14 PM »
You can realistically get 300hp out of one, heck 400 probably, but after that you are pushing your limit.
A 300hp 383 could be achieve with some good heads, intake and a chip.

http://www.streetperformance.com/part-showcase/blueprint-engines/2990-383-tbi-engine.html
http://www.goingfaster.com/spo/spo_technology_central.html
http://tbichips.com/truckmods.htm

Third Gen has a TON of info on the TBI's
http://www.thirdgen.org/techboard/tbi/391406-budget-tbi-buildup.html

Offline lawdog49

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Re: engine swap??
« Reply #18 on: September 26, 2008, 02:29:24 PM »
Thanks Chris- that is some really good info on the 3rdgen site.  tryin to wrap my brain around all the ecm talk gave me a headache though!  that motor you linked is the caprice engine- any idea on hp/torque for it, i thought i had read they were pretty weak on the torque end.  kinda like the looks of this motor tho---

http://paceperformance.com/index.asp?PageAction=VIEWPROD&ProdID=225981

wonder how the cam in it compares to the LT4 cam?
1991 GMC Suburban 1500   -   5.7/AT/4x4/TBI

Offline Captkaos

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Re: engine swap??
« Reply #19 on: September 26, 2008, 03:21:40 PM »
The stock LT4 has more lift and duration with a wider lobe seperation.
Truck ypu listed:  191@ .414/ 196@ .428 (1.5RR)--- 111 LSA
Stock LT4:          203@ .476/ 210@ .480 (1.6RR)--- 115 LSA

I didn't know about that motor, but that is isn't that bad with Vortec's...