4.8L into 4th Gen FBody
4.8L into 4th Gen FBody I am just... curious, and this is going from a V6 to a V8, but What would a N/A 4.8L with full boltons (besides Cam and Heads) do power wise?
Also if later I upgraded the heads / cam, what kind of power could I make out of it?
And finally what would a procharged or turbo'd 4.8L do at about 8 PSI?
Also if later I upgraded the heads / cam, what kind of power could I make out of it?
And finally what would a procharged or turbo'd 4.8L do at about 8 PSI?
On The Tree
Joined: Jan 2010
Posts: 168
Likes: 1
From: Fort Campbell, KY
This question would be worth re-posting in an engine internal section, would get better feed-back there.
n/a 4.8 with full bolts ons could get up as high as 400hp without too much trouble, nice heads would be the key there. Force-fed set ups would get closer to 600hp. And for the same money as a procharger set up you could bore and stroke a 4.8 out to a 383 without too many issues. That's worth about 500hp.
Here's the real question, how much are you wanting to spend on your 4.8 on top of the install into your 4th gen? Your budget will give you a better idea of how much power you can build.
n/a 4.8 with full bolts ons could get up as high as 400hp without too much trouble, nice heads would be the key there. Force-fed set ups would get closer to 600hp. And for the same money as a procharger set up you could bore and stroke a 4.8 out to a 383 without too many issues. That's worth about 500hp.
Here's the real question, how much are you wanting to spend on your 4.8 on top of the install into your 4th gen? Your budget will give you a better idea of how much power you can build.
4.8 is very capable under boost, as is the 5.3.
NA? well.. I wouldn't bother really on a 4.8. 5.3... eh if you want close to ls1 stock power for a budget maybe. 6L would be the best bet for that route.
NA? well.. I wouldn't bother really on a 4.8. 5.3... eh if you want close to ls1 stock power for a budget maybe. 6L would be the best bet for that route.
Eh, decent 6.0L LQ4's are running about $1,200 these days. A 4.8L is only 1/3rd of the price at around $400. I might go with the 4.8L and have it stroked to a 383 later.
Thing is, my 3.8L is about to die and I've been planning on doing a V8 swap for a long time but I'm on a budget. A 6.0L will probably be slightly too expensive. A 5.3L can probably be done with ease but I noticed how inexpensive the 4.8's were and it got me to thinking.
Thing is, my 3.8L is about to die and I've been planning on doing a V8 swap for a long time but I'm on a budget. A 6.0L will probably be slightly too expensive. A 5.3L can probably be done with ease but I noticed how inexpensive the 4.8's were and it got me to thinking.
On The Tree
Joined: Jan 2010
Posts: 168
Likes: 1
From: Fort Campbell, KY
Being on a budget, this makes the most sense. Get the LSX installed and running, then later you can build up a long block for a swap.
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Hotrod mag did a 4.8 build not too long ago. Basically a stock 4.8, small cam, fast 92 intake and tb and boosted the **** out of it with twin 67mm ebay turbos and supporting mods and it held together at nearly 27 psi which is where the stock coilpacks couldnt maintain a spark and make upwards of 1200fwhp numerous times. Seems like u could dial the boost back and run 700-800 hp for a while for a relatively cheap price for the power made.
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Verdad Gallardo Hotrod mag did a 4.8 build not too long ago. Basically a stock 4.8, small cam, fast 92 intake and tb and boosted the **** out of it with twin 67mm ebay turbos and supporting mods and it held together at nearly 27 psi which is where the stock coilpacks couldnt maintain a spark and make upwards of 1200fwhp numerous times. Seems like u could dial the boost back and run 700-800 hp for a while for a relatively cheap price for the power made.
One thing I've wondered is where to mount Turbo's in an LSX powered 4th Gen F-Body.
If I had the extra money I would consider doing that right now but I'd have to put it off - Im also wondering what heads/cam will do.
TECH Fanatic
Joined: Oct 2011
Posts: 1,356
Likes: 2
From: Felton Pa
Hotrod mag did a 4.8 build not too long ago. Basically a stock 4.8, small cam, fast 92 intake and tb and boosted the **** out of it with twin 67mm ebay turbos and supporting mods and it held together at nearly 27 psi which is where the stock coilpacks couldnt maintain a spark and make upwards of 1200fwhp numerous times. Seems like u could dial the boost back and run 700-800 hp for a while for a relatively cheap price for the power made.
What about a Procharger? would that be a good addition to a 4.8L? What should I expect out of that?
I am very tempted to go for the Turbo but it's such a squeeze with the big V8 in there and all... I would have to go with a Tubular K-Member wouldnt I?
I am very tempted to go for the Turbo but it's such a squeeze with the big V8 in there and all... I would have to go with a Tubular K-Member wouldnt I?
