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| 3800 SC - Trying to squeeze out a few more HP (Page 2/3) |
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Blacktree
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JAN 30, 09:05 PM
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Most people focus on porting the output side of the blower. But the input side is pretty restricted too. Porting the input side is pretty straightforward... just open it up. That should improve the efficiency of the blower.
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DimeMachine
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JAN 31, 09:06 PM
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| quote | Originally posted by La fiera:
Hey Dime!
Forgive Dennis, sometimes he speaks before he thinks, but he means well. Everyone including you are fixated in power to make your ride quick but how about making it lighter. You should look into getting rid of everything unnecessary in your Fiero. That's the problem with altering atmospheres to make power, we loose the ability to think.
The lighter your car is the faster it accelerate, stops and go through corners. In your case you are looking for acceleration so lightening your car is the best way to get quicker this coming summer.
Another thing you can try is the use of a 5th injector. Not for fuel but use it to take advantage of the cooling properties of E85.
Since the compressor heats up the air before entering the combustion chamber, how about injecting a mist of E85 right after the TB? The idea is to grab all the heat out of the incoming air so when the compressor squeezes the air and heats it up, the incoming air will not be as hot because most of the heat has been absorbed by the alcohol.
I had a 2.5L 4 cylinder 8 valve Dodge turbo and that's how I managed to do 415WHP and 465WTQ on 93 pump gas. In my case I use water injection, not meth injection, I did R&D for Snow Performance when he was working out if his garage! I used two injector nozzles, one before the TB and one on the intake manifold.
I hope you get quicker! |
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Dennis is just fine (:-). I did remove weight - took the low hanging fruit (same reason I love forced induction b/t/w) by taking out the AC compressor, lines, condenser and evaporator. I refuse to gut the interior because I think that looks trashy for a car that is on the street 99% of the time (vs the track). I would like to go with a little dry NOS kit at some point (instead of extra E85). Cool the intake charge way down and add a little oxygen at the same time. Thanks for taking the time to comment about my options!!
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DimeMachine
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JAN 31, 11:23 PM
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| quote | Originally posted by LFiero67:
Adding an intercooler took me from 11.8 to 11.4. Both with 2.6” pulley. They are way cheaper than they used to be. At your level, other than a turbo swap, it’s going to be tough to make significant gains.
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Nice vid!
For that 11.4 time - what fuel were you using?
I think we may have chatted a while back - wasn't a small Nitrous shot added as well?
Thanks for chiming in!
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RichLo1
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FEB 01, 09:11 AM
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Blacktree
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FEB 01, 09:49 AM
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Richard Holdener also did a "chemical intercooling" test on the 3800. Long story short, there's no replacement for an actual intercooler. The intercooler is designed to do one thing, and do it well. Things like water/meth injection and nitrous injection are good for other things. But they're not very effective as an intercooler.
Also, since you're already running E85, you're already getting the charge cooling from the ethanol. Any additional cooling from adding more chemicals is going to be minimal. Your bang-for-the-buck ratio will be better with an intercooler, even the expensive ones from ZZP.
OR you could take that intercooler money and put it toward a turbo build.  [This message has been edited by Blacktree (edited 02-01-2022).]
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olejoedad
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FEB 01, 11:15 AM
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Too bad you disconnected the A/C......use the intercooler as the evaporator for the A/C and really chill the air.
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Blacktree
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FEB 01, 01:08 PM
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oops [This message has been edited by Blacktree (edited 02-01-2022).]
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LFiero67
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FEB 02, 03:18 PM
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NO NITROUS HAS EVER BEEN ON MY CAR! LOL, no plans on ever using it.
94 octane with a bottle of NOS brand octane boost. Ice in intercooler tank. I don’t remember how much timing, but probably 21 degrees. 2.6” pulley, inlet ported gen 5 m90, zzp intercooler, xp cam, N* throttle body, headers, ported heads, 3.29 gears, 3500 zzp converter, 235/60R15 drag radials.------------------
10.007 @ 135.54MPH. <-- Video
Best 60' 1.42
Best mph 138.82
Billet 6262 Precision turbo, PT1001 intercooler, ST1 cam, 140lb springs, comp pushrods, HV3, stock L32 bottom end and heads.
Old M90 XP Cam time -
11.425 @115.60
1.543 60'
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DimeMachine
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FEB 03, 11:03 PM
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NO NITROUS HAS EVER BEEN ON MY CAR! LOL, no plans on ever using it.
94 octane with a bottle of NOS brand octane boost. Ice in intercooler tank. I don’t remember how much timing, but probably 21 degrees. 2.6” pulley, inlet ported gen 5 m90, zzp intercooler, xp cam, N* throttle body, headers, ported heads, 3.29 gears, 3500 zzp converter, 235/60R15 drag radials.
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Old M90 XP Cam time -
11.425 @115.60
1.543 60'
I was just studying your info and I think I figured out the difference.
You old supercharged setup 1.6 MPH quicker in the 1/4 than my current setup. My track is at about 1000 feet above sea level and if yours is similar, then the 1.6 extra MPH (which is indicative of Horsepower) is probably coming from the Gen 5 M90 and the XP cam vs my Gen 3 & lower duration VS cam. The bigger difference is your ET is almost 4 tenths quicker. You have the lower 3.29 ratio I have the steeper 2.93 ratio and you also have bigger/wider drag radials. I think I need to switch to the 3.29 ratio, combine that with the mods I am doing now and I think I will be right there with your old XP setup. Thanks for sharing the specs for analysis - I appreciate it!
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84/87 NB, 3800SC, E-85, VS Cam, 2.8 Pulley, 4T65E-HD, HP Tuners, AEM Wideband, Regal GS Gauges, S-10 Brake Booster. 1/4 mile -11.85 at 114mph[This message has been edited by DimeMachine (edited 02-03-2022).]
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olejoedad
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FEB 04, 12:06 AM
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Yeah, the ratio change should wake it right up!
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