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| 3800 SC Exhaust System - Headers anyone?... I need another 20-40 HP!! (Page 1/4) |
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DimeMachine
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JAN 18, 06:01 PM
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Did a search and found some old posts.
Just looking for new info from anyone who has made the switch to a header setup in their 3800 SC fiero what their thoughts are. Before and after dyno or 1/4 mile times would be awesome info to have but I will settle for any info you have to provide. I have been stuck at 11.8 @114MPH for several years and looking for a mod (other than a turbo or N2O) to get about 20-40 more HP.
Thanks in advance.
Dime/Toys------------------
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
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fieroguru
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JAN 18, 07:22 PM
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Besides the typical ZZP P-Log, some have modified the W-body headers from ebay to work, some have modified the 3.8 mustang headers to work as well.
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hnthomps
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JAN 18, 08:34 PM
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I have TOG headers on a 3800 SC Series III engine and am satisfied with them but do not really know if they add 20-30 hp. You should note that I tuned conservatively for reliability instead of absolute max HP. The dyno run showed around 300 HP at the wheels with a Getrag 282 transmission. I suspect that I could get a bit more HP out of this engine with a pulley change and/or tune mod. The current SC pulley is a 3.4" diameter but I have 3.0" in my storage area if I want more boost.
Current engine mods are as follows:
TOG header
larger intake and exhaust piping
ZZP intercooler
ZZP fuel logs
Northstar TV
3.4" modular pulley
VS cam
85 mm SLP MAF
Ceramic coated exhaust
.JPG)
Nelson[This message has been edited by hnthomps (edited 01-24-2020).]
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La fiera
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JAN 18, 09:08 PM
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You may want to make your exhaust modular since your car is a street/track car. Have a set of short (18" inches or more) header extentions to use on the track and when your are done at the track install back the muffled set up. What kind of exhaust do you have? How long is it?
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OntarioKev
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JAN 18, 10:31 PM
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Bigger cam....
Slicks/Drag Radials.
Otherwise turbo/N20. I don't think you will get anywhere near the gains you want from the price of headers especially for the price
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olejoedad
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JAN 19, 07:58 AM
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sourmash
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JAN 19, 10:36 AM
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Will the full stack immediately result in 20-40 hp, or does it allow for more tuning which results in 20-40 more? Serious question.
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olejoedad
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JAN 19, 11:09 AM
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Cooler intake air allows more fuel and more ignition advance.
Dont know how many horse it will gain, but it opens the door....[This message has been edited by olejoedad (edited 01-19-2020).]
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La fiera
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JAN 19, 01:59 PM
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| quote | Originally posted by olejoedad:
Cooler intake air allows more fuel and more ignition advance.
Dont know how many horse it will gain, but it opens the door....
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He is already using E85 and that would give him plenty of cooling. What I would do if I had that set up to take advange of the cooling properties of E85,
I would install a 7th injector right after the TB. By spraying E85 in the upstrem it can absorb some heat from the incoming air before it gets compressed.
At the same time the cooler compressed air has the oxygen molecules packed closer together making the charge denser and even more so that it also
carries the extra oxygen and hydrocarbons from the E85 itself. It'll be like water/meth but with a punch.
But then again, he has to balance the extra intake volume with more exhaust flow.
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DimeMachine
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JAN 19, 08:35 PM
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| quote | Originally posted by sourmash:
Will the full stack immediately result in 20-40 hp, or does it allow for more tuning which results in 20-40 more? Serious question. |
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Keep the ideas coming - I appreciate them! Since I have E85 and can run 20 degrees timing no problem with a Gen 3 and 2.8, I think the intercooler would become an obstruction due to how small the area is under the supercharger. Think about all the space the intercooler heat exhhanger takes and It quickly makes sense that this would probably cost me HP. If the surface area could be made much larger, then the cooling effect would help. Concur?
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