Thread: finaly upgrates last dyno sheet

+ Reply To Thread

First

Last

Posts: 21-30 of 31

Search Thread

2011-05-25 15:35:40

#21

ivanorcan

Member

Join Date: 2009-10-21
Location: Alajuela, Costa Rica
Posts: 256
Trader Score: 1 (100%)

Nice numbers, but i have a question, why doesnt the power holds untill 8500rpms? i mean, i see a peak of 220+whp, but i have seen other SR20VEs with less power but the power curve keeps "flat" until 8500rpms then starts going down...

Would it be timing and the need of a more octane gas?

(sorry for my english)

0 Likes

Be the first to like this post.

1996 Nissan 200sx SER
3" WAI + K&N Filter, 20V Header, 3" Exhaust + 3" Glasspack +3" Dynomax Ultraflow silencer, SR20VE, Aeromotive FPR, 179whp & 146lb-ft. Wilwood 11" Brakes and SS Brake Lines. Front and Rear Strut Bars, KYB AGX+Road Magnet Springs, Rear Whiteline Adjustable Swaybar.
Proud member of the STRT and Shell croud.

Reply Reply With Quote

2011-05-25 23:26:45

#22

Saca Chispas Online/offline status of Saca Chispas is unknown

Member

Join Date: 2010-06-01
Location: Peru
Posts: 69
Trader Score: 0 (0%)

Originally Posted by STRATTON

looks good.

a few things you can do to improve power. wich depends on what you can due in your class.

1. run a higher octane fuel, something like 106 etc.
2. re-tune these motors really shine with aggressive timing.

also why did you not run a higher compression piston ? unless your limited in your class wich i understand.

stratton.

hello, yes we race with a rule book that we cant use more than 11.5:1 we also cant use more than 98 octane we really test alot with this engine we have gone many times to the dyno different changes and testing all with ITBS we got more torque but low RPM with N1 we got more RPM but lower torque so we decided to stay with the torque

0 Likes

Be the first to like this post.

Reply Reply With Quote

2011-05-25 23:30:32

#23

Saca Chispas Online/offline status of Saca Chispas is unknown

Member

Join Date: 2010-06-01
Location: Peru
Posts: 69
Trader Score: 0 (0%)

Originally Posted by cory

Yea good powered figures but they are falling off early. I've had those came making peak at 8.5 and holding till 9.5k. I would say maybe your intake or header are holding you back but your making good power so maybe you need to play with cam timing

we think its our header its the only thing we havent change or test...

0 Likes

Be the first to like this post.

Reply Reply With Quote

2011-05-25 23:49:32

#24

Saca Chispas Online/offline status of Saca Chispas is unknown

Member

Join Date: 2010-06-01
Location: Peru
Posts: 69
Trader Score: 0 (0%)

Originally Posted by alex_b13

Nice numbers... U went from 192whp 149tq to 221whp 170tq with kelford cams or u had other mods ??

no, we climb from 192 to 197 then to 206 then to 221 but we also went low numbers with some stupid changes... but at the end we test alot and we know what works what dosent work example we have done a complete comparation about exaust:

we did 8 run testing only exaust sizes and long. 2 runs per change.
2.5'' exaust to the back of the car = 217whp
2.5'' exaust to the door = +0.8 whp
3'' exaust to the door = +3whp
3'' exaust to the back of the car =+4whp

we have done many test like this one

I can tell that we also test a fuel cooler can that you can see it on the picture below the dyno sheet it gave us +3whp using ice with dry ice.

sorry about my english

0 Likes

Be the first to like this post.

Reply Reply With Quote

2011-05-26 00:00:22

#25

alex_b13

Member

Join Date: 2010-05-25
Location:
Posts: 233
Trader Score: 0 (0%)

Originally Posted by Saca
no, we climb from 192 to 197 then to 206 then to 221 but we also went low numbers with some stupid changes... but at the end we test alot and we know what works what dosent work example we have done a complete comparation about exaust:

we did 8 run testing only exaust sizes and long. 2 runs per change.
2.5'' exaust to the back of the car = 217whp
2.5'' exaust to the door = +0.8 whp
3'' exaust to the door = +3whp
3'' exaust to the back of the car =+4whp

we have done many test like this one

I can tell that we also test a fuel cooler can that you can see it on the picture below the dyno sheet it gave us +3whp using ice with dry ice.

sorry about my english

Nice, this is good to know thanks man. This was STD bore? And what headers u have?

0 Likes

Be the first to like this post.

The coward only threatens when he is safe.

Reply Reply With Quote

2011-05-26 00:00:50

#26

Saca Chispas Online/offline status of Saca Chispas is unknown

Member

Join Date: 2010-06-01
Location: Peru
Posts: 69
Trader Score: 0 (0%)

Originally Posted by doctor
what are the cams dialed at?

104 / 104 center lobe

Last edited by Saca Chispas on 2011-05-26 at 00-04-25.

0 Likes

Be the first to like this post.

Reply Reply With Quote

2011-05-26 00:03:23

#27

STRATTON

BLUE RAY PWNES ME

Join Date: 2007-12-15
Location:
Posts: 5,918
Trader Score: 8 (100%)

Originally Posted by Saca
hello, yes we race with a rule book that we cant use more than 11.5:1 we also cant use more than 98 octane we really test alot with this engine we have gone many times to the dyno different changes and testing all with ITBS we got more torque but low RPM with N1 we got more RPM but lower torque so we decided to stay with the torque

well then good job, thats good power for a 2 liter. im also gonna guess you cant increase cc's in your class either.

keep it up man, enjoyed the vids you posted, look foward to the new ones !!

stratton.

0 Likes

Be the first to like this post.

if ruled the world and everything in it, skys the limit id push the q 4 5 infinit....

Reply Reply With Quote

2011-05-26 00:13:16

#28

Saca Chispas Online/offline status of Saca Chispas is unknown

Member

Join Date: 2010-06-01
Location: Peru
Posts: 69
Trader Score: 0 (0%)

Originally Posted by POC

Is power not falling off very early for those cams?

Why those cams over the 184-D ?

who has does cams? are they good for try a buy? lol

0 Likes

Be the first to like this post.

Reply Reply With Quote

2011-05-26 00:16:34

#29

Saca Chispas Online/offline status of Saca Chispas is unknown

Member

Join Date: 2010-06-01
Location: Peru
Posts: 69
Trader Score: 0 (0%)

Originally Posted by STRATTON

our rule book permist max 2022cc so what we missing to do is use piston at 86.5mm and we gonna be at 2020cc now we are using 86mm piston 1998cc

With this change I hope we gain little more whp