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Cuddles with his SR20s
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561 Posts
Discussion Starter #1 (Edited)
Ok guys here is a thread that will anwser most of if not all of your questions on popular bolt-ons for the SR20DE motor. Please try not to cloud this thread up with you should of done this or that. i did all of these on purpose with this specific inteniton of sharing my findings. if you have questions please dont hesitate to ask i will post them in the thread with an anwser. thanks for reading

Mac

First off this is a 1991 Sentra SER with roughly 169XXX miles. AC is still in and will be removed at a later date.

Modifacations in the thread include:
Aem Cold air intake
Ebay 2.5" header
Obx test pipe
Jim Wolf Technology S3 cams
JWT ecu tune
HKS Sport Exhaust
9lbs. Flywheel


Base line power

the 119 and 120hp pulls where in 4th
the 102 was in 4th with the ac on. i aways wondered what the Hp drop was with the ac on. now i know.







INTAKE
Here is the dyno with the AEM Cai installed. i used the my 119whp run as an overlay cause it doesnt have the dip the 120whp does and is more realisticly the accurate pull.

Most of you will laugh at the fact that i made almost 4whp over stock. but as you can see there is more to the gains then peak HP. and im sure that a few of you know that power band is more important then peak hp.

You can see in the graph that from 3300rpm to 5000rpms i am making more HP then on the stock pull. but from 5k rpms to 5.7k rpms i am making the same as stock. from 5.7k rpms to redline i am making much more then i was stock. in some parts around10-12whp more. also my peak hp is moved to almost 6.5krpms. about 300rpm later then stock. torque is almost not changed at all. this is a good thing and a bad thing but does not effect the feel of the car at all.


the over all feel of the car now is very smooth in the top end and feels much better. i can feel the car pull more but i am very aware that there is some mental aspect to that.

Exhaust

Here is the dyno with the hks exhaust and i must say i am very impressed with the findings. much better then i expected. in this its my base, Intake Installed, and intake and exhaust installed you can see the top end gained a very good amount of power as much as 20whp over stock. cant wait to get headers and see the gains. the exhaust is to quiet so im going to be installing a test pipe. well see if any gains are produced





JWT S3 CAMS, JWT ECU, AND TEST PIPE
Installed the JWT S3 cams and test pipe. i was very inpressed with the gains. the torque is unbeliveable. the intake exhaust run is the last dyno i had.Now the cam run is very impressive with the amount of torque it is making. you can also see that the line is much smoother then the blue run. this is due to a new cap , rotor and wires. the parts are not new but they are nissan where my car had cheap aftermarket set on them, so they are new to the car. the s3 cams with JWT ECU run is not bad at all raising the HP and TQ all through the power band. well some would take that flash as a waste of money but the car did make more power and idles much smoother now then it did with out it. the drivablity is also better with it.





HEADER
heres the dyno with a ebay header and a 2.5" outlet. The Blue Run is the header installed and the Red Run is the last run i did see above for more info on that run. the headers were a great complement to the whole setup i have going right now. you can see that every part of the rpm range has a gain, not one spot does not. the peak is only 7whp which is more then i was expecting. this doesnt exactly mean if you put just a header on it will provide this kind of HP i think with the cams intake ect they are a good compliment for it all.





FLYWHEEL

dyno with the flywheel only made 2whp and 2wtq at peak but like all the other mods its is through out the power band. the engine revs much smoother and faster. rev match is like breathing its super easy.





i installed my factory cat and looks like i lost alot of power through out. sucks but now i dont have any buzz in the exhaust anymore.



i will be installing S4s next week so stay tuned for that.
 

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slamed150
Joined
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1,380 Posts
91 se-r
2" ssac
2 pc pullys
2.5" vrs
cutout
custom 3" short ram with aem dryflow
clutchnet clutch
15deg timing
stock ecu


added bc stage 2's no s/r
still 15 deg' timing
overlayed with the no cams

 

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Baby Blue VVL
Joined
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3,202 Posts
99 SE-L 104k miles
2 power outputs on the same graph
1st
2.25in exhaust
PR CAI
'91 intake cam
G20ecu
Pacesetter Header

2nd
all of the above with JWT S4 cams (cams were put in at 104k miles)

 

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#TranceFamily
Joined
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598 Posts
99 G20 with 108xxx miles

1st Baseline Dyno run (03/2007):

Land & Sea Dyno

Injen CAI
OBX Header
2 1/4 Crush bent exhaust
Remus Muffler
Adv. Ign. @ 19*
Mautai916 Grounding Kit
Shell 91 octane gas
17" wheels



2nd Dyno Run (07/2007) with 90 degree weather:

DynoJet Dyno

Injen CAI
OBX Header
2 1/4 Crush bent exhaust
Remus Muffler
Brian Crower Stage 2 Cams
Greddy Cam gears (both set at 0)
Greddy rocker arm stoppers
Adv. Ign. @ 19*
Mautai916 Grounding Kit
NGK Wires
Some Copper NGK plugs
Shell 91 octane gas
16" wheels

All 3 runs"

Best Run (#3):


I'll be taking my car next month to the dyno again for newer mods. I wish I had the same torque numbers as you guys.

I have a question about dyno's. What does corrected dyno run uncorrected dyno run mean?
Can you guys school me on the air/fuel mixture graph? :)
 

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Up Yours Toad
Joined
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605 Posts
maybe it's just me but i thought this thread's purpose was more of a step-by-step of what you can expect from certain mods and less of a "post up your dyno sheets" sort of thing?
 

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Deviled Egg!
Joined
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6,321 Posts
Here are Mine...

EDIT: (6/21/07)
Dyno Scheduled for 6/21/07 - Changes: S3r's and CAI instead of WAI... We'll see... :eek2:

EDIT: (12/27/06)
Please check new results and video's below... ;)


The Car:
1998 SE-R w/ JDM Roller Rocker Swap from a Primera (Original DE spun a bearing)

Current Mods:
Full Mod List: http://sr20forum.com/showpost.php?p=1415772&postcount=2

Basically its just...
---Injen WAI (I took off the CAI Extension since winter is coming up)
---JWT Pop Charger (Stock Overemmisioned '98 ECU though)
---Hotshot Gen 3 Header (Thermocoated by me)
---VRS 2.5" Stainless Cat-Back (Stock Cat, w/ 14" Magnaflow Res, Magnaflow Muffler)
---Outlaw Engineering Thermoblock Spacers
---Thundervolt 50 Ignition Wires
---JWT S3R Camshafts

Here's a shot from some day...

Dyno & Other info:
---Mustang Dynometer (Product #: MD-IMP-SE) using Powerdyne Software
---Curb weight inputted was 2586lb's
---All runs were in 4th Gear
---Told him to Stop Testing at about 6.8k (RR and I don't really rev that high)
---Hood remained closed for each run...

Results???: (Check Post #2 for Graphs/Videos)
147whp 129ft-lb @ the wheels w/ Hotshot Gen 3
143whp 125ft-lb @ the wheels w/ Hotshot Gen 3

EDIT: (12/27/06)
154whp 136ft-lb @ the wheels w/ 2.5" SSAC
153whp 135ft-lb @ the wheels w/ 2.5" SSAC


EDIT: (xx/xx/xx)
156whp 135ft-lb @ the wheels w/ cam addition
(yeah, not sure why... haven't bothered to investigate much)

And lastly... I hit my speed governor in all my runs :( so Fuel Cut Owns me... YRMV :eek2:

Graphs/Pics :)

Same Mustang Dynometer

This was with stock cams when it was about 47 degrees outside, 60 or so in shop - 154whp/136ft-lb's


This was After the S3R's when it was 87 outside, 95 on the shop wall, 93 on the floor and muggy. 156.XXwhp/135ft-lb's


Disregarding the weather differences... :rolleyes: :::sigh::: I'll have to get another dyno when its cold outside with the cams...

Dyno #1 of the day... 2.5" SSAC Header


Dyno #2 of the day... 2.5" SSAC Header


Information for 1/4 mile Simulation... 2.5" SSAC Header


Dyno Graph #1 w/ 2" Hotshot Generation 3 Header


Dyno Graph #2 w/ 2" Hotshot Generation 3 Header
 

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Cuddles with his SR20s
Joined
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561 Posts
Discussion Starter #9
I have a question about dyno's. What does corrected dyno run uncorrected dyno run mean?
Can you guys school me on the air/fuel mixture graph? :)
the dyno programs correct for altitude, temp, humidity, ect... in different countrys and some areas have a set correction factor. in the USA we use SAE. uncorrected shows the run with no correction for the above. usally less horse power.

the air fuel graph on your car looks good. its right around 13:1. its lean just before 3500rpms but its to low to really see any significant gains. you could gain maybe 1-2whp with leaning out the top end but once a gain not really worth it. you might need to change your timing or do a tune up. the dip in the top end is not a good thing. from 6200-6800rpms. it should look more like your base line only taller. like this: this is my base and final




macidcrook are you dynoing pullies for the car and can you see what steppin up to a 3in cold air intake like pr or hs can gain. great work by the way
Me and G Spec performance are in the middle of some pulley testing. ill post that stuff when ihave the info. i would love to do more parts changing but i dont have the access to those parts. if some one was to donate them for a bit for research i would gladly put them on.
 

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Up Yours Toad
Joined
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605 Posts
yeah if anybody wants to 'donate' parts to mee too i wouldn't mind...

seriously though, would it be hard to get 160 whp? what else would you need to do? it seems like you have done all the bolt-ons so i don't see how you could make 20 whp more when everything you've done has only amounted to 20 whp.
 

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Deviled Egg!
Joined
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6,321 Posts
yeah if anybody wants to 'donate' parts to mee too i wouldn't mind...

seriously though, would it be hard to get 160 whp? what else would you need to do? it seems like you have done all the bolt-ons so i don't see how you could make 20 whp more when everything you've done has only amounted to 20 whp.
160 whp is definitely attainable with a DE... its been broken down a few times.

Decent Header
2.25-2.5" Full Exhaust
Aftermarket Camshaft
CAI/WAI
Pop Charger
Intake Thermal Spacer
W/P & Crank Pullies
Throw in some Timing
Low Humidity Dyno Day

That should be it on a stock ECU

SAFC to squeeze more ponies if necessary

Throw a Flywheel in the mix for kicks...
 

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Up Yours Toad
Joined
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605 Posts
he has all of that minus the pullies, intake thermal spacer, SAFC. But he's got a JWT computer.

so you think those few mods and a low humidity day would give him 20whp more?

on a track only car he could upgrade the cams but not much more on a street car, maybe with S4's or S5's due to drive-ability issues.

Right?
 

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Canyon_Boogie
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6,667 Posts
he has all of that minus the pullies, intake thermal spacer, SAFC. But he's got a JWT computer.

so you think those few mods and a low humidity day would give him 20whp more?

on a track only car he could upgrade the cams but not much more on a street car, maybe with S4's or S5's due to drive-ability issues.

Right?
Also depends on the condition of the motor. Some are stronger than others... it all depends. So obviously having a good strong motor to start out with helps alot.
 

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Cuddles with his SR20s
Joined
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561 Posts
Discussion Starter #14
on a track only car he could upgrade the cams but not much more on a street car, maybe with S4's or S5's due to drive-ability issues.

Right?
drivability issues can be up to the driver. its much harder to drive a car that you have to get the revs up to get it to move alittle bit or a car that makes no torque low end. real lopey idles can be hard to start off with out reving the engine higher. but in some cases when the car is only driven on the weekend it can be acceptable.
 

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SE-R Geek / Nissan Tech
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814 Posts
anyone running 10:1? i have yet to go to the dyno, but its hopefully gonna get done this spring....

The Race Car

10:1 UK engine [highport]
head milled 8mm (max tolerance by FSM)
cometic .030" Head Gasket
JWT S3
Hotshot GenV ceramic coated
2.5" side exit (4x14" magnaflow round, 12" resonator)
AEM CAI
port matched manifolds/head
ported JDM intake manifold (no emissions ports)
no A/C or P/S
UR Crank, W/P, Alternator pullies
8.5 lb. flywheel
19* timing


anybody have anything similar?
 

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Registered
Joined
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1,005 Posts
Stock RR Nissan Primera 9,3 cr

Some more data from a stock p11....

stock p11 timing at 12.
Some more data from a stock p11....

stock p11 timing at 12.





 
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