OK so I'm getting ready to start pulling my motor apart on my 98 gm to rebuild and install my PI top end (which I am porting and polishing heads along with five angle valve job). I am curious as to what potential this set up will have with a proper tune and without the tune. I believe I will attain around 10.5 to 1 compression with this set up. Also I have installed custom dual exhaust and modified my stock intake plumbing to work with a 4" cone filter that I am fabbing a heat shield for at the moment. I also am installing a 3.27 gear set with a traction loc. Any suggestions while I'm in there? And guesses as to power it can obtain both per and post tune?
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I could be wrong so I hope some one else can verify this.
But I think a 10.5 to 1 compression ratio may require premium gas?
As for power, I can't say. But the gear change alone is going to be the best bang for the buck.Last edited by mcninetyone; 01-29-2014, 06:39 PM. -
Premium gas is no problem, I only run 93octane anyhow. And I know gear change will be nice just trying to find a helper to assist me with that. I'll rip apart an entire car all except a rear diff and transmission lolComment
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When I did my gear swap from 2:73 to 3:55 I just swapped out the whole rear end.
Of course I was also going for disc brakes as well.Comment
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Yeah I have disc brakes already, and unfortunately I got my diff from an explorerComment
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I installed just a PI intake on my non PI motor and noticed a pretty decent power gain.1985 LTD Crown Victoria - Currently restoring after she caught fire! CFI to SEFI to Carb swap, all custom wiring, Duraspark 2 ignition, Motorcraft 2100 Carb, slicktop, Shorty headers dumped before rear axle, 140 Speedo, 3G alt, And currently building an engine for her.
2000 Lincoln Town Car Signature Series - 165XXX, PI intake swap
, 30 MPG Easy on the Highway
, All options except dual exhaust. Currently looking for 2 front seats: Heated, Memory, and Light Graphite color!!Comment
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So no one can guest image potential?Comment
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I don't know of anyone whose done a head swap... only intake or complete engine swap. I'd imagine that it would be a little better than the intake swap alone, but tuning would be required.
Only two things are infinite, the universe and human stupidity, and I'm not sure about the former. -- Albert Einstein
rides: 93 Crown Vic LX (The Red Velvet Cake), 2000 Crown Vic base model (Sandy), 2003 Expedition (the vacation beast)
Originally posted by gadget73Originally posted by dmccaigComment
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With talking to my tuner he has told me it will be driveable pre tune but may run lean at higher rpms and will for sure need premiumComment
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I'm sure the visitor has some unrealized pictures but have no idea whatOriginally posted by wannabep71 View Post
Good luck
PeteOriginally posted by gadget73
2003 Grand Marquis Ultimate, the "Stealth Bomber": http://www.grandmarq.net/vb/showthre...-Grand-Marquis
1991 S-10, 'Bulldog', 2.5l 5 speed: http://www.grandmarq.net/vb/showthre...375#post698375
1985 Town Car, 'Faded Glory', gone but not forgotten. 84/87/91/97 MGMs too.Comment
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Woops, damn auto correct. Meant guesstimateComment
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