PICTURES Exhaust Cost Benchmark, 16V USA to duals
02-28-2008, 05:30 AM
#1
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PICTURES Exhaust Cost Benchmark, 16V USA to duals
Job done. Pics added a few posts down.
Costs & learnings as follows, for use as a benchmark for others.
$380 Dual in/out short cat w/ integrated pipes (mail order delivered) (listed for 85/6 cars)
$186 (2)Magnaflow offset same side pair intermediates (Pick up at PepBoys)
$121 Magnaflow dual in/out (ditto)
$158 Unpolished stainless 304 pipe ---- 2 1/4" ID
$263 Labor/ovhd: sketch, mandrell bend pipe, create hanger system, weld, install
$ 15 Metal gaskets to manifold outlets
So, I think that figures to $1123 complete. Then add a Bosch O2 sensor from 90 Taurus, $47.
All welded, disconnect from manifold outlets + three bolts to drop as one piece.
For the most part, the pipes are run like on the stock later dual cars. Mids are a little lower than most of you would want. Rear cross pipe runs under the trans with some space, not behind. Its perfect for my use.
Once and for all....pipes made to bolt to an 85/early 86 32V do bolt-up EXACTLY to the USA 4.7 ...; if and only if you retain the old cast-iron manifold pipes of the 4.7 16V, as I did.
Only if you convert your 16V to the 32V manifolds will you then require the infamous spacer pipe. Someday I'll retrofit that.
Shop guys loved the sound. For some of you it clearly will be too quiet. Perfect for me, though. If an X instead of cats were used, or a header system, it would be beastly and more to some of your tastes perhaps.
Part number for direct cat set-up, Eastern 40435
Part number for 2 1/4 mids, # 14375
For 2 1/4 dual in/out Mag, # 14378
Hope this helps somebody.
Costs & learnings as follows, for use as a benchmark for others.
$380 Dual in/out short cat w/ integrated pipes (mail order delivered) (listed for 85/6 cars)
$186 (2)Magnaflow offset same side pair intermediates (Pick up at PepBoys)
$121 Magnaflow dual in/out (ditto)
$158 Unpolished stainless 304 pipe ---- 2 1/4" ID
$263 Labor/ovhd: sketch, mandrell bend pipe, create hanger system, weld, install
$ 15 Metal gaskets to manifold outlets
So, I think that figures to $1123 complete. Then add a Bosch O2 sensor from 90 Taurus, $47.
All welded, disconnect from manifold outlets + three bolts to drop as one piece.
For the most part, the pipes are run like on the stock later dual cars. Mids are a little lower than most of you would want. Rear cross pipe runs under the trans with some space, not behind. Its perfect for my use.
Once and for all....pipes made to bolt to an 85/early 86 32V do bolt-up EXACTLY to the USA 4.7 ...; if and only if you retain the old cast-iron manifold pipes of the 4.7 16V, as I did.
Only if you convert your 16V to the 32V manifolds will you then require the infamous spacer pipe. Someday I'll retrofit that.
Shop guys loved the sound. For some of you it clearly will be too quiet. Perfect for me, though. If an X instead of cats were used, or a header system, it would be beastly and more to some of your tastes perhaps.
Part number for direct cat set-up, Eastern 40435
Part number for 2 1/4 mids, # 14375
For 2 1/4 dual in/out Mag, # 14378
Hope this helps somebody.
Last edited by Landseer; 12-12-2009 at 07:30 AM. Reason: make one more point, add part nos
02-28-2008, 06:30 AM
#2
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Pics or it didn't happen. 
To use a well worn phrase from Sailing Anarchy http://www.sailinganarchy.com (NB forums not desperately office friendly especially on fridays). Seriously pics would be nice - maybe not for me as I don't have an 84 but for others and I wouldn't mind seeing the installed pics of Magnaflow as I am about to embark on that journey with the 88 SE.
To use a well worn phrase from Sailing Anarchy http://www.sailinganarchy.com (NB forums not desperately office friendly especially on fridays). Seriously pics would be nice - maybe not for me as I don't have an 84 but for others and I wouldn't mind seeing the installed pics of Magnaflow as I am about to embark on that journey with the 88 SE.
Last edited by jon928se; 02-28-2008 at 06:33 AM. Reason: screwed up the html links as usual - I'll get the hang of it one day
02-28-2008, 12:54 PM
#3
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If you grind out and smooth the cast iron manifold outlets to the size of the 32V gasket (51->55mm ID), you should get a further improvement, at least as good or better than using 85-86 logs.
02-28-2008, 06:54 PM
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Poor boy headers
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02-28-2008, 08:43 PM
#8
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02-28-2008, 10:24 PM
#9
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Listen to me now unt believe me later, you girlie men, with your girlie exhausts.
You'll need 2" down pipes, too. (Pulled from a 32V cat works well.)
Best I could with w/stock 1¾" down pipes and a nasty homemade 3" single was 190rwhp, or 220 rwtq. With bored out outlets, 2" down pipes, single stock 2½" pipe, into a stock, debaffeled pumkin, 214/277 rw sae.
(Read it unt weep, losers.) (Read the whole thing, maybe you learn somethinck, der.)
Best I could with w/stock 1¾" down pipes and a nasty homemade 3" single was 190rwhp, or 220 rwtq. With bored out outlets, 2" down pipes, single stock 2½" pipe, into a stock, debaffeled pumkin, 214/277 rw sae.
02-28-2008, 10:58 PM
#10
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Thread Starter
Nice work. Read that when I first joined-up Renn. I contemplated buying a welder and DIY instead , but figured it would take forever to master it.
Actually marked the ends of the pipes to grind like you did, but wimped out. Just wanted to get it onto the road. Been laying underneath 928 for 5 months and hadn't logged more than 20 lifetime miles in one (until last night). Wave file tomorrow.
One bad note, unrelated. Exhaust smells as sweet as it sounds. Figured that would happen. Needle just starting to creep up. Hopefully there will be little pitting and erosion. There goes Saturday.
Actually marked the ends of the pipes to grind like you did, but wimped out. Just wanted to get it onto the road. Been laying underneath 928 for 5 months and hadn't logged more than 20 lifetime miles in one (until last night). Wave file tomorrow.
One bad note, unrelated. Exhaust smells as sweet as it sounds. Figured that would happen. Needle just starting to creep up. Hopefully there will be little pitting and erosion. There goes Saturday.
02-29-2008, 01:56 AM
#12
Rest in Peace
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So what is the mailing address to send you a set of cast irons to modify and update?
Job done. Pics added a few posts down.
Costs & learnings as follows, for use as a benchmark for others.
$380 Dual in/out short cat w/ integrated pipes (mail order delivered)
$186 Magnaflow offset same side pair intermediates (Pick up at PepBoys)
$121 Magnaflow dual in/out (ditto)
$158 Unpolished stainless 304 pipe ---- 2 1/4" ID
$263 Labor/ovhd: sketch, mandrell bend pipe, create hanger system, weld, install
$ 15 Metal gaskets to manifold outlets
So, I think that figures to $1123 complete. Then add a Bosch O2 sensor from 90 Taurus, $47.
All welded, disconnect from manifold outlets + three bolts to drop as one piece.
For the most part, the pipes are run like on the stock 32V 85. Mids are a little lower than most of you would want. Rear cross pipe runs under the trans with some space, not behind. Its perfect for my use.
Once and for all....pipes made to bolt to an 85/early 86 32V do bolt-up EXACTLY to the USA 4.7 ...; if and only if you retain the old cast-iron manifold pipes of the 4.7 16V, as I did.
Only if you convert your 16V to the 32V manifolds will you then require the infamous spacer pipe. Someday I'll retrofit that.
Shop guys loved the sound. For some of you it clearly will be too quiet. Perfect for me, though. If an X instead of cats were used, or a header system, it would be beastly and more to some of your tastes perhaps.
Part number for direct cat set-up, Eastern 40435
Part number for 2 1/4 mids, # 14375
For 2 1/4 dual in/out Mag, # 14378
Hope this helps somebody.
Costs & learnings as follows, for use as a benchmark for others.
$380 Dual in/out short cat w/ integrated pipes (mail order delivered)
$186 Magnaflow offset same side pair intermediates (Pick up at PepBoys)
$121 Magnaflow dual in/out (ditto)
$158 Unpolished stainless 304 pipe ---- 2 1/4" ID
$263 Labor/ovhd: sketch, mandrell bend pipe, create hanger system, weld, install
$ 15 Metal gaskets to manifold outlets
So, I think that figures to $1123 complete. Then add a Bosch O2 sensor from 90 Taurus, $47.
All welded, disconnect from manifold outlets + three bolts to drop as one piece.
For the most part, the pipes are run like on the stock 32V 85. Mids are a little lower than most of you would want. Rear cross pipe runs under the trans with some space, not behind. Its perfect for my use.
Once and for all....pipes made to bolt to an 85/early 86 32V do bolt-up EXACTLY to the USA 4.7 ...; if and only if you retain the old cast-iron manifold pipes of the 4.7 16V, as I did.
Only if you convert your 16V to the 32V manifolds will you then require the infamous spacer pipe. Someday I'll retrofit that.
Shop guys loved the sound. For some of you it clearly will be too quiet. Perfect for me, though. If an X instead of cats were used, or a header system, it would be beastly and more to some of your tastes perhaps.
Part number for direct cat set-up, Eastern 40435
Part number for 2 1/4 mids, # 14375
For 2 1/4 dual in/out Mag, # 14378
Hope this helps somebody.
02-29-2008, 08:46 AM
#13
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Having both styles of manifolds in my garage. The 1985 SS manifold is the way to go. First of all the tubes are ROUND. The cast iron manifold inside path is so oval its almost rectangle.
What I discoved with the 4.5L using the blower is the cast irons hold heat and get very hot under boost. Proably so restrictive they contribute to detonation. You can have the cast irons if you like, just be prepared to pay $$ in shipping as the things could anchor a row boat.
Having said that, I did dyno 330 HP using them. I think cast irons are fine for a N/A engine up to 300 HP.
Tony
What I discoved with the 4.5L using the blower is the cast irons hold heat and get very hot under boost. Proably so restrictive they contribute to detonation. You can have the cast irons if you like, just be prepared to pay $$ in shipping as the things could anchor a row boat.
Having said that, I did dyno 330 HP using them. I think cast irons are fine for a N/A engine up to 300 HP.
Tony
