NA 5.5/6MT 280whp... Comparisons of intakes and custom IM inside... Video and pics
02-18-2011, 06:44 PM
#1
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NA 5.5/6MT 280whp... Comparisons of intakes and custom IM inside... Video and pics
Well I must say I am very happy with the results. Hard work paid off!
Each run I will show is the best of 3 runs with each setup.
Exact power mod list from filter to exhaust then electronics:
Vias delete stock IM (later home-made IM)
3" intake and stock MAF (later LRMAF and 3.5" intake)
NWP IM spacers
Cattman V3 Headers/Y-pipe
Cattman 3" catback with extra resonator
UTEC with Tuner to 7000RPM redline
Two notes before I get into the meat of things.
1. The stock MAF/stock IM tune on my UTEC is a thing of beauty... over a year in the making with absolutely perfect AF doing a flat 13.5 from 3000-4000, then settling to 12.8-13.0 until redline. The 3.5" dynos are all done with a quick and dirty tune that ranges anywhere from 11.9 to 12.7 that could probably see several HP gains if I'd had time to sit down and tune it properly. Alas, I did not.
2. I ran on my 18" street wheels/tires and power steering was connected. I am rather convinced that my lightweight track wheels and DRs alone would gain 8-10whp, and anywhere from 3-8whp from power steering. This car may dyno queen up 300whp SAE after cam install
Before all the testing and results, here are the final numbers. SAE, this is 280whp 258wtq. Went with STD because it follows the 275whp line on the graph so beautifully.
First test:
Stock IM with vias delete, stock MAF, 3" intake vs Stock IM with vias delete, LRMAF, 3.5" intake.
It still gains power, all over the RPM range, even with a inferior tune. Take that, naysayers.
~So the 8.2@85 in my sig was done with 265whp and major power dropoff above 6000....
Second test:
Stock IM with vias delete, stock MAF, 3" intake vs "s"SSIM, LRMAF, 3.5" intake
Looks like with a proper tune, this new IM will lose no power ANYWHERE in the powerband vs the stock one!
18whp peak gains and 50whp at 7000 RPMs!
Closer view on SAE smoothing 5 of the top end gains.
Next test:
Super short intake (TB>MAF>FILTER) vs "length tuned" intake (TB>MAF>PIPE>FILTER) that was tuned for acoustic resonance at around 6000 rpms.
So... super short SRIs are not the best way to go! This intake was 31" in length, giving a resonant frequency around 100hz (6000RPMs). It's obviously the better way to go.
First run on the dyno vs last run on the dyno
50whp gains at 7000RPMs... 20whp peak gains. All from 3.5" intake/LRMAF and custom intake manifold!
And last but not least... Video! I must admit, this thing sounds beautiful. All the people from the neighboring body shop were trickling over to check it out and I was asked at least once if it was turbocharged.
One more note... The smoke at the end of most runs is due to a TIMING cut rev limiter from the N2MB WOT box. It's still dumping fuel in.
Custom intake manifold build thread: http://forums.maxima.org/all-motor/6...yno-gains.html
Each run I will show is the best of 3 runs with each setup.
Exact power mod list from filter to exhaust then electronics:
Vias delete stock IM (later home-made IM)
3" intake and stock MAF (later LRMAF and 3.5" intake)
NWP IM spacers
Cattman V3 Headers/Y-pipe
Cattman 3" catback with extra resonator
UTEC with Tuner to 7000RPM redline
Two notes before I get into the meat of things.
1. The stock MAF/stock IM tune on my UTEC is a thing of beauty... over a year in the making with absolutely perfect AF doing a flat 13.5 from 3000-4000, then settling to 12.8-13.0 until redline. The 3.5" dynos are all done with a quick and dirty tune that ranges anywhere from 11.9 to 12.7 that could probably see several HP gains if I'd had time to sit down and tune it properly. Alas, I did not.
2. I ran on my 18" street wheels/tires and power steering was connected. I am rather convinced that my lightweight track wheels and DRs alone would gain 8-10whp, and anywhere from 3-8whp from power steering. This car may dyno queen up 300whp SAE after cam install
Before all the testing and results, here are the final numbers. SAE, this is 280whp 258wtq. Went with STD because it follows the 275whp line on the graph so beautifully.
First test:
Stock IM with vias delete, stock MAF, 3" intake vs Stock IM with vias delete, LRMAF, 3.5" intake.
It still gains power, all over the RPM range, even with a inferior tune. Take that, naysayers.
~So the 8.2@85 in my sig was done with 265whp and major power dropoff above 6000....
Second test:
Stock IM with vias delete, stock MAF, 3" intake vs "s"SSIM, LRMAF, 3.5" intake
Looks like with a proper tune, this new IM will lose no power ANYWHERE in the powerband vs the stock one!
18whp peak gains and 50whp at 7000 RPMs!
Closer view on SAE smoothing 5 of the top end gains.
Next test:
Super short intake (TB>MAF>FILTER) vs "length tuned" intake (TB>MAF>PIPE>FILTER) that was tuned for acoustic resonance at around 6000 rpms.
So... super short SRIs are not the best way to go! This intake was 31" in length, giving a resonant frequency around 100hz (6000RPMs). It's obviously the better way to go.
First run on the dyno vs last run on the dyno
50whp gains at 7000RPMs... 20whp peak gains. All from 3.5" intake/LRMAF and custom intake manifold!
And last but not least... Video! I must admit, this thing sounds beautiful. All the people from the neighboring body shop were trickling over to check it out and I was asked at least once if it was turbocharged.
One more note... The smoke at the end of most runs is due to a TIMING cut rev limiter from the N2MB WOT box. It's still dumping fuel in.
Custom intake manifold build thread: http://forums.maxima.org/all-motor/6...yno-gains.html
Last edited by sparks03max; 02-19-2011 at 05:49 PM.
awesome numbers...wow 
02-18-2011, 07:58 PM
#8
ive got some things to do... im drawing up the gameplan on a drawing board... good number man... i love... time to revisit the LR intake and MAF, ill also be creating my own intake but i want to experiment a lil also... i know you compare JP's numbers but remember he doesnt have the LR maf or a bigger intake.... however this is still very impressive
02-18-2011, 08:06 PM
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ive got some things to do... im drawing up the gameplan on a drawing board... good number man... i love... time to revisit the LR intake and MAF, ill also be creating my own intake but i want to experiment a lil also... i know you compare JP's numbers but remember he doesnt have the LR maf or a bigger intake.... however this is still very impressive
02-18-2011, 08:16 PM
#11
Agreed... great times non the less..... sparks mind if I hit you up in the near futur to fab up an intake for me, not like the one you have but I have something in mind of how I want it...
02-19-2011, 06:11 AM
#23
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I owned a Kinetix and I can tell you this for sure. I would need 2+ hours of dyno time to compare it to a kinetix because the POS kinetix doesn't even remotely port match to the LIM (round vs oval), so you need a custom ported LIM and NWP spacer. Then, the Kinetix is just a much smaller plenum, smaller elbow version of what I've made. I sold it because I didn't like it.
Are suggesting that instead of what I built myself, I should have spent literally 20 times more money on ITBs?
Are suggesting that instead of what I built myself, I should have spent literally 20 times more money on ITBs?
02-19-2011, 07:43 AM
#26
02-19-2011, 07:45 AM
#27
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I retract my retort, then. Thanks!
02-19-2011, 08:01 AM
#28
Also, did you notice a difference in manifold pressure between the 2 manifolds?
02-19-2011, 08:04 AM
#30
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Yea, he's a good guy who's filled with knowledge and always there to give answers and advice to any questions you may have. Speaking of ITBs, a heads up comparison would be awsome between them and your IM. If you ever wanna set that up, contact him and see what you guys can do about it. It would be interesting to say the least.
Also, did you notice a difference in manifold pressure between the 2 manifolds?
Also, did you notice a difference in manifold pressure between the 2 manifolds?
02-19-2011, 03:34 PM
#35
i say you look past that and head for JP... he told me the samething too, i highly doubt it
02-19-2011, 03:39 PM
#36
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I'm aiming to do really well, but something tells me jaypee will keep himself a step ahead if I start to catch up. He was saying something about headwork before imp vs dom.
02-19-2011, 03:52 PM
#37
well this is good time to catch up... he dont seem like he's gonna be doing that lol... then again, knowing his sneeky **** he probebly will if he feels threatened im sure
