3" downpipe vs 3.5"

[87GN 98GTP]

Wandering if a swap would be worth it from any others with similar combos. 3.8 stroked 224/224 billet cam,pte 67/68 CEA turbo


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[007gn]

Wandering if a swap would be worth it from any others with similar combos. 3.8 stroked 224/224 billet cam,pte 67/68 CEA turbo


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Every body is gonna tell you that they need to know more about your combo ( heads converter engine rpm how much boost trans shift points et goals etc.. Then after all of that they're gonna tell you hell no such and such has gone 7s with a 3 inch down pipe with unported iron heads on drag radials...... and you should be running faster and your tune is off and you NEED a xfi. It'll fix everything. This board can be funny sometimes. Good luck

 

[87GN 98GTP]

Well I have big stuff version 1(eww not the best but its tuned and runs great) gn1s not ported 3200-3400 non lock


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[TT/Ameasap]

Mine sounds pretty mean at idle and very mean at WOT. No muffler...no drone.

 

[Chuck Leeper]

274" stage 2, 3" dp, etc, = 840 FWHP
3.5", same combo, same dyno, back to back, = 840FWHP.

Just like FOX News: We report, you decide.

 

[Flyin Brian]

Sometimes I wish I would have bought a 3" instead of a 3.5" just for clearance reasons. It does sound pretty cool with the dump open though.

 

[ijames]

274" stage 2, 3" dp, etc, = 840 FWHP
3.5", same combo, same dyno, back to back, = 840FWHP.

Just like FOX News: We report, you decide.

Chuck, what exhaust was after the downpipe? You say FWHP so I'm guessing an engine dyno, was the dp just connected to a larger pipe through the wall to the outside? Any data or guesses if dp size matters more or less with a moderately restrictive exhaust instead of an open pipe? I'm just wondering out loud .

 

[TTA976]

Didn't think it mattered till 800+hp...good 3" straight thru system is capable of high horsepower.

 

[fastblackracing]

274" stage 2, 3" dp, etc, = 840 FWHP
3.5", same combo, same dyno, back to back, = 840FWHP.

Just like FOX News: We report, you decide.

Chuck what turbo and boost pressure were you running at 840 FWHP?