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| 4.9 Caddy motor vs 3800 supercharged (Page 2/5) |
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va441975
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MAR 31, 01:03 PM
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Dennis LaGrua
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MAR 31, 01:52 PM
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I have driven both the 4.9L and 3800SC and my driving impression is that the 4.9L gives you a better 1/8 mile ET while the 3800SC.may edge it out in the 1/4 mile. Now if you use the higher FDR of the 4T60e tranny as Joe is using they might be comparable.
My 60K mile 4.9L powertrain will end up costing about half of what my 3800SC cost. Its also a much easier swap and in a cost per power comparison it wins out. The only thing that I dislike about the 4.9 swap is that the distance between the front firewall and the front exhaust manifold is very small, maybe an inch or so. This makes routing wires, fuel and and heater lines back there more difficult. ------------------
" THE BLACK PARALYZER" -87GT 3800SC Series III engine, custom ZZP /Frozen Boost Intercooler setup, 3.4" Pulley, Northstar TB, LS1 MAF, 3" Spintech/Hedman Exhaust, P-log Manifold, Autolite 104's, MSD wires, Custom CAI, 4T65eHD w. custom axles, Champion Radiator, S10 Brake Booster, HP Tuners VCM Suite.
"THE COLUSSUS"
87GT - ALL OUT 3.4L Turbocharged engine, Garrett Hybrid Turbo, MSD ign., modified TH125H
" ON THE LOOSE WITHOUT THE JUICE "
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olejoedad
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MAR 31, 02:58 PM
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| quote | Originally posted by va441975:
Thank you. What you mean by exhaust sound? |
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Think 4.3 S-10 with a hole in the muffler.
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olejoedad
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MAR 31, 03:01 PM
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| quote | Originally posted by Dennis LaGrua:
(snip)
The only thing that I dislike about the 4.9 swap is that the distance between the front firewall and the front exhaust manifold is very small, maybe an inch or so. This makes routing wires, fuel and and heater lines back there more difficult.
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Your engine is mounted too far forward. I have plenty of room between manifold and front firewall. Do your drive axles have a slight forward angle?
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Patrick
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MAR 31, 04:12 PM
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| quote | Originally posted by va441975:
What you mean by exhaust sound?
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If you've got to ask, I suspect it won't matter to you. 
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va441975
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MAR 31, 09:23 PM
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I like a good exhaust sound but that’s not the number one priority. I want to install a good reliable engine with plenty of horsepower.
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Spadesluck
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MAR 31, 10:05 PM
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Both motors are very reliable, that will not be a problem. HP wise, they are both above the stock motor.
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Patrick
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MAR 31, 10:44 PM
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| quote | Originally posted by va441975:
I like a good exhaust sound but that’s not the number one priority.
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If the #1 priority is power (hopefully with a reliable engine build), ask yourself how often you'll actually make use of all that power while puttering around town. 
Now ask yourself how often you'll be hearing your engine while doing the same puttering around town.
I'd say for a lot of us older guys who grew up with V8's, the sound of a 3800sc is... ummm... less than desirable. 
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va441975
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MAR 31, 10:52 PM
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Yeah both posts make sense. I’ll have to YouTube the sound of a 4.9. It also depends on the exhaust obviously. I have a flow master on my 2.8 and it sounds pretty good for a 6 cylinder.
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Patrick
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MAR 31, 11:19 PM
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| quote | Originally posted by va441975:
I have a flow master on my 2.8 and it sounds pretty good for a 6 cylinder.
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Oh, I agree. The 2.8 sounds remarkably nice, especially for a 6-banger. (I have a Formula I've autocrossed, and it sounds great.) However, the 3800 has a reputation (well deserved, IMO) for sounding awful. It has little to do with the exhaust system... it's the firing order of the cylinders. Add a whining super-charger to the mix, and... well, you get the picture.
Yes, listening to some engines on YouTube will help you understand what several of us have been referring to. Try and find some videos where the engines are actually under load. Revving the crap out of a parked car is useless for hearing the true exhaust note.
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